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Institute
- Medizinische Klinik und Poliklinik I (624) (remove)
Sonstige beteiligte Institutionen
- Zentraleinheit Klinische Massenspektrometrie (3)
- Johns Hopkins School of Medicine (2)
- Johns Hopkins School of Medicine, Baltimore, MD, U.S. (2)
- Apotheke, Universitätsklinikum Würzburg (1)
- Center for Interdisciplinary Clinical Research, Würzburg University, Würzburg, Germany (1)
- Datenintegrationszentrum Würzburg (DIZ) (1)
- Hospital Augsburg, Augsburg, Germany (1)
- Interdisziplinäre Biomaterial- und Datenbank Würzburg (ibdw) (1)
- Johns Hopkins University School of Medicine (1)
- Joslin Diabetes Center (Harvard Medical School) (1)
Background: The Global initiative for chronic Obstructive Lung Disease (GOLD) defines COPD as a fixed postbronchodilator ratio of forced expiratory volume in 1 second and forced vital capacity (FEV1/FVC) below 0.7. Agedependent cut-off values below the lower fifth percentile (LLN) of this ratio derived from the general population have been proposed as an alternative. We wanted to assess the diagnostic accuracy and prognostic capability of the GOLD and LLN definition when compared to an expert-based diagnosis. Methods: In a prospective cohort study, 405 patients aged ≥ 65 years with a general practitioner’s diagnosis of COPD were recruited and followed up for 4.5 (median; quartiles 3.9; 5.1) years. Prevalence rates of COPD according to GOLD and three LLN definitions and diagnostic performance measurements were calculated. The reference standard was the diagnosis of COPD of an expert panel that used all available diagnostic information, including spirometry and bodyplethysmography. Results: Compared to the expert panel diagnosis, ‘GOLD-COPD’ misclassified 69 (28%) patients, and the three LLNs misclassified 114 (46%), 96 (39%), and 98 (40%) patients, respectively. The GOLD classification led to more false positives, the LLNs to more false negative diagnoses. The main predictors beyond the FEV1/FVC ratio for an expert diagnosis of COPD were the FEV1 % predicted, and the residual volume/total lung capacity ratio (RV/TLC). Adding FEV1 and RV/TLC to GOLD or LLN improved the diagnostic accuracy, resulting in a significant reduction of up to 50% of the number of misdiagnoses. The expert diagnosis of COPD better predicts exacerbations, hospitalizations and mortality than GOLD or LLN. Conclusions: GOLD criteria over-diagnose COPD, while LLN definitions under-diagnose COPD in elderly patients as compared to an expert panel diagnosis. Incorporating FEV1 and RV/TLC into the GOLD-COPD or LLN-based definition brings both definitions closer to expert panel diagnosis of COPD, and to daily clinical practice.
Die vorliegende Arbeit beschreibt Konzept, Umsetzung, sowie Überprüfung und Evaluation einer neuen Lehrmethode im Bereich der geriatrischen Lehre und Ausbildung von Medizinstudenten des neunten Semesters an der Universität Würzburg. Ziel der Arbeit war es, ein neues Lehrinstrument zu etablieren, dieses zu überprüfen und damit dessen Berechtigung zu belegen sowie den zukünftigen Einsatz im Rahmen der medizinischen Ausbildung zu ermöglichen. Das Hauptanliegen bestand darin, das Verständnis der teilnehmenden Studenten für das Leben in höherem Alter zu fördern. Unter dem Begriff „Instant Aging“ – Selbsterfahrung des Alterns sollten die Teilnehmer die Möglichkeit haben, innerhalb eines 90-minütigen Praktikums die Perspektive eines älteren oder chronisch kranken Menschen einzunehmen. Dabei wurden die Teilnehmer mit vier häufigen Erkrankungen des Alters konfrontiert und konnten diese am eigenen Körper empfinden. Als Vergleich diente das bisher eingesetzte Praktikum der medizinisch-geriatrischen Lehre – stellvertretend für das Konzept der „darbietenden Lehre“. Somit nahmen 125 Teilnehmer sowohl am „Instant Aging“-Praktikum als auch am bisherigen Praktikum der „darbietenden Lehre“ teil und beurteilten im Anschluss an die jeweilige Veranstaltung ihre Erfahrungen hinsichtlich der erlernten Fähigkeit, das Leben in höherem Alter besser nachvollziehen zu können sowie die körperliche Situation eines älteren Menschen nun besser nachempfinden zu können. Die Hypothese, dass das neue Lehrkonzept des „Instant Aging“ diese Fähigkeit in höherem Maße als das bisher eingesetzte Praktikum fördert, wurde bestätigt. Neben der erhöhten Fähigkeit der Empathie und des Verständnisses für die Situation älterer Menschen stieg ebenso der Grad der Betroffenheit der Teilnehmer, wobei der Bedarf der Nachbesprechung dieser Betroffenheit in beiden Praktikums-gruppen niedrig war. Neben der vergleichenden Evaluation wurde im Praktikum des „Instant Aging“ eine Bewertung der Durchführung des Praktikums bezüglich Auswahl und Anzahl der dargestellten Krankheitsbilder, Kompetenz und Anzahl der Tutoren sowie der Zeiteinteilung vorgenommen, die sehr positiv ausfiel. Das Praktikum des „Instant Aging“ findet im Rahmen des „Skills Lab“, einem medizinischen Ausbildungs- und Simulationszentrum der medizinischen Fakultät der Universität Würzburg seit der Anfertigung dieser Arbeit innerhalb der geriatrischen Lehre statt. Anregungen und Ideen der Teilnehmer zur weiteren Verbesserung des Praktikums werden ständig integriert und umgesetzt.
Growth, ageing and atherosclerotic plaque development alter the biomechanical forces acting on the vessel wall. However, monitoring the detailed local changes in wall shear stress (WSS) at distinct sites of the murine aortic arch over time has been challenging. Here, we studied the temporal and spatial changes in flow, WSS, oscillatory shear index (OSI) and elastic properties of healthy wildtype (WT, n = 5) and atherosclerotic apolipoprotein E-deficient (Apoe\(^{−/−}\), n = 6) mice during ageing and atherosclerosis using high-resolution 4D flow magnetic resonance imaging (MRI). Spatially resolved 2D projection maps of WSS and OSI of the complete aortic arch were generated, allowing the pixel-wise statistical analysis of inter- and intragroup hemodynamic changes over time and local correlations between WSS, pulse wave velocity (PWV), plaque and vessel wall characteristics. The study revealed converse differences of local hemodynamic profiles in healthy WT and atherosclerotic Apoe\(^{−/−}\) mice, and we identified the circumferential WSS as potential marker of plaque size and composition in advanced atherosclerosis and the radial strain as a potential marker for vascular elasticity. Two-dimensional (2D) projection maps of WSS and OSI, including statistical analysis provide a powerful tool to monitor local aortic hemodynamics during ageing and atherosclerosis. The correlation of spatially resolved hemodynamics and plaque characteristics could significantly improve our understanding of the impact of hemodynamics on atherosclerosis, which may be key to understand plaque progression towards vulnerability.
Anxiety disorders and depression are common comorbidities in cardiac patients. Mice lacking the serotonin transporter (5-HTT) exhibit increased anxiety-like behavior. However, the role of 5-HTT deficiency on cardiac aging, and on healing and remodeling processes after myocardial infarction (MI), remains unclear. Cardiological evaluation of experimentally naïve male mice revealed a mild cardiac dysfunction in ≥4-month-old 5-HTT knockout (−/−) animals. Following induction of chronic cardiac dysfunction (CCD) by MI vs. sham operation 5-HTT−/− mice with infarct sizes >30% experienced 100% mortality, while 50% of 5-HTT+/− and 37% of 5-HTT+/+ animals with large MI survived the 8-week observation period. Surviving (sham and MI < 30%) 5-HTT−/− mutants displayed reduced exploratory activity and increased anxiety-like behavior in different approach-avoidance tasks. However, CCD failed to provoke a depressive-like behavioral response in either 5-Htt genotype. Mechanistic analyses were performed on mice 3 days post-MI. Electrocardiography, histology and FACS of inflammatory cells revealed no abnormalities. However, gene expression of inflammation-related cytokines (TGF-β, TNF-α, IL-6) and MMP-2, a protein involved in the breakdown of extracellular matrix, was significantly increased in 5-HTT−/− mice after MI. This study shows that 5-HTT deficiency leads to age-dependent cardiac dysfunction and disrupted early healing after MI probably due to alterations of inflammatory processes in mice.
Early healing after myocardial infarction (MI) is characterized by a strong inflammatory reaction. Most leukotrienes are pro-inflammatory and are therefore potential mediators of healing and remodeling after myocardial ischemia. The enzyme 5-lipoxygenase (5-LOX) has a key role in the transformation of arachidonic acid in leukotrienes. Thus, we tested the effect of 5-LOX on healing after MI. After chronic coronary artery ligation, early mortality was significantly increased in 5-LOX\(^{−/−}\) when compared to matching wildtype (WT) mice due to left ventricular rupture. This effect could be reproduced in mice treated with the 5-LOX inhibitor Zileuton. A perfusion mismatch due to the vasoactive potential of leukotrienes is not responsible for left ventricular rupture since local blood flow assessed by magnetic resonance perfusion measurements was not different. However, after MI, there was an accentuation of the inflammatory reaction with an increase of pro-inflammatory macrophages. Yet, mortality was not changed in chimeric mice (WT vs. 5-LOX\(^{−/−}\) bone marrow in 5-LOX\(^{−/−}\) animals), indicating that an altered function of 5-LOX\(^{−/−}\) inflammatory cells is not responsible for the phenotype. Collagen production and accumulation of fibroblasts were significantly reduced in 5-LOX\(^{−/−}\) mice in vivo after MI. This might be due to an impaired migration of 5-LOX\(^{−/−}\) fibroblasts, as shown in vitro to serum. In conclusion, a lack or inhibition of 5-LOX increases mortality after MI because of healing defects. This is not mediated by a change in local blood flow, but through an altered inflammation and/or fibroblast function.
Context: Patients with primary adrenal insufficiency (PAI) or congenital adrenal hyperplasia (CAH) are at a high risk of adrenal crisis (AC). Glucocorticoid sensitivity is at least partially genetically determined by polymorphisms of the glucocorticoid receptor (GR).
Objectives: To determine if a number of intercurrent illnesses and AC are associated with the GR gene polymorphism \(Bcl\)I in patients with PAI and CAH.
Design and patients: This prospective, longitudinal study over 37.7 ± 10.1 months included 47 PAI and 25 CAH patients. During the study period, intercurrent illness episodes and AC were documented.
Results: The study period covered 223 patient years in which 21 AC occurred (9.4 AC/100 pat years). There were no significant differences between \(Bcl\)I polymorphisms (CC (n=29), CG (n=34) and GG (n=9)) regarding BMI, hydrocortisone equivalent daily dose and blood pressure. We did not find a difference in the number of intercurrent illnesses/patient year among \(Bcl\)I polymorphisms (CC (1.5±1.4/pat year), CG (1.2±1.2/pat year) and GG (1.6±2.2/pat year)). The occurrence of AC was not significantly different among the homozygous (GG) genotype (32.5 AC/100 pat years), the CC genotype (6.7 AC/100 pat years) and the CG genotype (4.9 AC/100 pat years). Concomitant hypothyroidism was the highest in the GG genotype group (5/9), compared to others (CC (11/29) and CG (11/34)).
Conclusions: Although sample sizes were relatively small and results should be interpreted with caution, this study suggests that the GR gene polymorphism \(Bcl\)I may not be associated with the frequencies of intercurrent illnesses and AC.
Background
Solitary metastases to the pancreas are rare. Therefore the value of resection in curative intention remains unclear. In the literature there are several promising reports about resection of solitary metastasis to the pancreas mainly of renal origin.
Case presentation
Here we report for the first time on the surgical therapy of a 1.5 cm solitary pancreatic metastasis of an adrenocortical carcinoma. The metastasis occurred almost 6 years after resection of the primary tumor. A partial pancreatoduodenectomy was performed and postoperatively adjuvant mitotane treatment was initiated. During the follow-up of 3 years after surgery no evidence of tumor recurrence occurred.
Conclusion
Resection of pancreatic tumors should be considered, even if the mass is suspicious for metastatic disease including recurrence of adrenocortical cancer.
Female patients affected by Fabry disease, an X-linked lysosomal storage disorder, exhibit a wide spectrum of symptoms, which renders diagnosis, and treatment decisions challenging. No diagnostic test, other than sequencing of the alpha-galactosidase A gene, is available and no biomarker has been proven useful to screen for the disease, predict disease course and monitor response to enzyme replacement therapy. Here, we used urine proteomic analysis based on capillary electrophoresis coupled to mass spectrometry and identified a biomarker profile in adult female Fabry patients. Urine samples were taken from 35 treatment-naive female Fabry patients and were compared to 89 age-matched healthy controls. We found a diagnostic biomarker pattern that exhibited 88.2% sensitivity and 97.8% specificity when tested in an independent validation cohort consisting of 17 treatment-naive Fabry patients and 45 controls. The model remained highly specific when applied to additional control patients with a variety of other renal, metabolic and cardiovascular diseases. Several of the 64 identified diagnostic biomarkers showed correlations with measures of disease severity. Notably, most biomarkers responded to enzyme replacement therapy, and 8 of 11 treated patients scored negative for Fabry disease in the diagnostic model. In conclusion, we defined a urinary biomarker model that seems to be of diagnostic use for Fabry disease in female patients and may be used to monitor response to enzyme replacement therapy.
Adrenocortical carcinoma (ACC) is a rare tumor and prognosis is overall poor but heterogeneous. Mitotane (MT) has been used for treatment of ACC for decades, either alone or in combination with cytotoxic chemotherapy. Even at doses up to 6 g per day, more than half of the patients do not achieve targeted plasma concentration (14–20 mg L\(^{-1}\)) even after many months of treatment due to low water solubility, bioavailability, and unfavorable pharmacokinetic profile. Here a novel MT nanoformulation with very high MT concentrations in physiological aqueous media is reported. The MT‐loaded nanoformulations are characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, and powder X‐ray diffraction which confirms the amorphous nature of the drug. The polymer itself does not show any cytotoxicity in adrenal and liver cell lines. By using the ACC model cell line NCI‐H295 both in monolayers and tumor cell spheroids, micellar MT is demonstrated to exhibit comparable efficacy to its ethanol solution. It is postulated that this formulation will be suitable for i.v. application and rapid attainment of therapeutic plasma concentrations. In conclusion, the micellar formulation is considered a promising tool to alleviate major drawbacks of current MT treatment while retaining bioactivity toward ACC in vitro.
Background: Adequate anticoagulation is prerequisite for effective hemodialysis to prevent clotting in the extracorporeal circuit. We aimed providing first data on the efficacy and safety of the low-molecular-weight heparin certoparin in this setting.
Methods: Multicenter, open-label, 8-week trial. Patients received a single dose of 3,000 IU certoparin i.v. with additional titration steps of 600 IU and/or continuous infusion if necessary.
Results: 120 patients were screened, 109 enrolled (median age 71; range 26-90 years) and 106 available for efficacy analyses. The percentage of unsatisfactory dialysis results at 8 weeks due to clotting or bleeding, was 1.9% (n = 2/106; 95% confidence interval [CI] 0.23-6.65%); no major bleeding. 1.9% had moderate/severe clotting in the lines/bubble catcher and 2.8% in the dialyser at week 8.15.7 +/- 14.3% of the dialysis filters' visual surface area was showing redness. In subgroups of patients receiving median doses of 3000 +/- 0, 3000 (2400-6000) and 4200 (3000-6600) IU, plasma aXa levels at baseline, 4 and 8 weeks were 0.24 [ 95% CI 0.21-0.27], 0.33 [0.27-0.40] and 0.38 [0.33-0.45] aXa IU/ml at 2 h. C-48h was 0.01 [0.01-0.02] aXa IU at all visits. At baseline and 4 weeks AUC(0-48h) was 2.66 [2.19-3.24] and 3.66 [3.00-4.45] aXa IU*h/ml. In 3.0% of dialyses (n = 83/2724) prolonged fistula compression times were documented. Eight patients (7.34%) had at least one episode of minor bleeding. 4) 85.3% of patients had any adverse event, 9.2% were serious without suspected drug relation; and in 32 patients a drug-relation was suspected.
Conclusions: Certoparin appears effective and safe for anticoagulation in patients undergoing maintenance hemodialysis.
Background
Adequate anticoagulation is prerequisite for effective hemodialysis to prevent clotting in the extracorporeal circuit. We aimed providing first data on the efficacy and safety of the low-molecular-weight heparin certoparin in this setting.
Methods
Multicenter, open-label, 8-week trial. Patients received a single dose of 3,000 IU certoparin i.v. with additional titration steps of 600 IU and/or continuous infusion if necessary.
Results
120 patients were screened, 109 enrolled (median age 71; range 26–90 years) and 106 available for efficacy analyses. The percentage of unsatisfactory dialysis results at 8 weeks due to clotting or bleeding, was 1.9% (n = 2/106; 95% confidence interval [CI] 0.23–6.65%); no major bleeding. 1.9% had moderate/severe clotting in the lines/bubble catcher and 2.8% in the dialyser at week 8. 15.7 ± 14.3% of the dialysis filters’ visual surface area was showing redness. In subgroups of patients receiving median doses of 3000 ± 0, 3000 (2400–6000) and 4200 (3000–6600) IU, plasma aXa levels at baseline, 4 and 8 weeks were 0.24 [95%CI 0.21–0.27], 0.33 [0.27–0.40] and 0.38 [0.33–0.45] aXa IU/ml at 2 h. \(C_{48h}\) was 0.01 [0.01–0.02] aXa IU at all visits. At baseline and 4 weeks \(AUC_{0-48h}\) was 2.66 [2.19–3.24] and 3.66 [3.00–4.45] aXa IU*h/ml. In 3.0% of dialyses (n = 83/2724) prolonged fistula compression times were documented. Eight patients (7.34%) had at least one episode of minor bleeding. 4) 85.3% of patients had any adverse event, 9.2% were serious without suspected drug relation; and in 32 patients a drug-relation was suspected.
Conclusions
Certoparin appears effective and safe for anticoagulation in patients undergoing maintenance hemodialysis.
No studies have carried out an extensive analysis of the possible association between non-syndromic pheochromocytomas and paragangliomas (PPGLs) and other malignancies. To assess >the risk of additional malignancy in PPGL, we retrospectively evaluated 741 patients with PPGLs followed-up in twelve referral centers in Italy. Incidence of second malignant tumors was compared between this cohort and Italian patients with two subsequent malignancies. Among our patients, 95 (12.8%) developed a second malignant tumor, which were mainly prostate, colorectal and lung/bronchial cancers in males, breast cancer, differentiated thyroid cancer and melanoma in females. The standardized incidence ratio was 9.59 (95% CI 5.46–15.71) in males and 13.21 (95% CI 7.52–21.63) in females. At multivariable analysis, the risk of developing a second malignant tumor increased with age at diagnosis (HR 2.50, 95% CI 1.15–5.44, p = 0.021 for 50–59 vs. <50-year category; HR 3.46, 95% CI 1.67–7.15, p < 0.001 for >60- vs. <50-year). In patients with available genetic evaluation, a positive genetic test was inversely associated with the risk of developing a second tumor (HR 0.25, 95% CI 0.10–0.63, p = 0.003). In conclusion, PPGLs patients have higher incidence of additional malignant tumors compared to the general population who had a first malignancy, which could have an impact on the surveillance strategy.
Ruxolitinib (RUX) is approved for the treatment of steroid-refractory acute and chronic graft versus host disease (GvHD). It is predominantly metabolized via cytochrome P450 (CYP) 3A4. As patients with GvHD have an increased risk of invasive fungal infections, RUX is frequently combined with posaconazole (POS), a strong CYP3A4 inhibitor. Knowledge of RUX exposure under concomitant POS treatment is scarce and recommendations on dose modifications are inconsistent. A physiologically based pharmacokinetic (PBPK) model was developed to investigate the drug–drug interaction (DDI) between POS and RUX. The predicted RUX exposure was compared to observed concentrations in patients with GvHD in the clinical routine. PBPK models for RUX and POS were independently set up using PK-Sim\(^®\) Version 11. Plasma concentration-time profiles were described successfully and all predicted area under the curve (AUC) values were within 2-fold of the observed values. The increase in RUX exposure was predicted with a DDI ratio of 1.21 (C\(_{max}\)) and 1.59 (AUC). Standard dosing in patients with GvHD led to higher RUX exposure than expected, suggesting further dose reduction if combined with POS. The developed model can serve as a starting point for further simulations of the implemented DDI and can be extended to further perpetrators of CYP-mediated PK-DDIs or disease-specific physiological changes.
No abstract available
Aims
It has been hypothesized that cardiac decompensation accompanying acute heart failure (AHF) episodes generates a pro-inflammatory environment boosting an adaptive immune response against myocardial antigens, thus contributing to progression of heart failure (HF) and poor prognosis. We assessed the prevalence of anti-myocardial autoantibodies (AMyA) as biomarkers reflecting adaptive immune responses in patients admitted to the hospital for AHF, followed the change in AMyA titres for 6 months after discharge, and evaluated their prognostic utility.
Methods and results
AMyA were determined in n = 47 patients, median age 71 (quartiles 60; 80) years, 23 (49%) female, and 24 (51%) with HF with preserved ejection fraction, from blood collected at baseline (time point of hospitalization) and at 6 month follow-up (visit F6). Patients were followed for 18 months (visit F18). The prevalence of AMyA increased from baseline (n = 21, 45%) to F6 (n = 36, 77%; P < 0.001). At F6, the prevalence of AMyA was higher in patients with HF with preserved ejection fraction (n = 21, 88%) compared with patients with reduced ejection fraction (n = 14, 61%; P = 0.036). During the subsequent 12 months after F6, that is up to F18, patients with newly developed AMyA at F6 had a higher risk for the combined endpoint of death or rehospitalization for HF (hazard ratio 4.79, 95% confidence interval 1.13–20.21; P = 0.033) compared with patients with persistent or without AMyA at F6.
Conclusions
Our results support the hypothesis that AHF may induce patterns of adaptive immune responses. More studies in larger populations and well-defined patient subgroups are needed to further clarify the role of the adaptive immune system in HF progression.
Background
The role of a healthy dietary pattern in the prevention of abdominal aortic aneurysms (AAA) is unknown. We aimed to evaluate the relationship between adherence to a Dietary Approaches To Stop Hypertension‐style dietary pattern and the risk of incident AAAs.
Methods and Results
Dietary intake was assessed via a 66‐item food frequency questionnaire at baseline (1987–1989) and at visit 3 (1993–1995) in 13 496 participants enrolled in the ARIC (Atherosclerosis Risk in Communities) study without clinical AAA (mean age, 54 years). A dietary scoring index based on food times was constructed to assess self‐reported adherence to a dietary approaches to stop hypertension‐style dietary pattern. Participants were followed for incident clinical AAAs using hospital discharge diagnoses, Medicare inpatient and outpatient diagnoses, or death certificates through December 31, 2011. Cox proportional hazards models with covariate adjustment were used to estimate hazard ratios with 95% confidence intervals. During a median follow‐up of 23 years, there were 517 incident AAA cases. Individuals with a Dietary Approaches To Stop Hypertension‐style diet score in the highest quintile had a 40% lower risk of hospitalization for AAA than those in the lowest quintile (hazard ratio\(_{Q5}\) vs \(_{Q1}\): 0.60; 95% confidence intervals: 0.44, 0.83; P\(_{trend}\)=0.002). In detailed analyses, higher consumption of fruits, vegetables, whole grains, low‐fat dairy, and nuts and legumes was related to a lower risk for AAA.
Conclusions
Greater adherence to a Dietary Approaches To Stop Hypertension‐style dietary pattern was associated with lower risk for AAA. Higher consumption of fruits, vegetables, whole grains, low‐fat dairy as well as nuts and legumes may help to decrease the burden of AAAs.
Adjuvant platinum-based chemotherapy in radically resected adrenocortical carcinoma: a cohort study
(2021)
Background
After radical resection, patients with adrenocortical carcinoma (ACC) frequently experience recurrence and, therefore, effective adjuvant treatment is urgently needed. The aim of the study was to investigate the role of adjuvant platinum-based therapy.
Methods
In this retrospective multicentre cohort study, we identified patients treated with adjuvant platinum-based chemotherapy after radical resection and compared them with patients without adjuvant chemotherapy. Recurrence-free and overall survival (RFS/OS) were investigated in a matched group analysis and by applying a propensity score matching using the full control cohort (n = 268). For both approaches, we accounted for immortal time bias.
Results
Of the 31 patients in the platinum cohort (R0 n = 25, RX n = 4, R1 n = 2; ENSAT Stage II n = 11, III n = 16, IV n = 4, median Ki67 30%, mitotane n = 28), 14 experienced recurrence compared to 29 of 31 matched controls (median RFS after the landmark at 3 months 17.3 vs. 7.3 months; adjusted HR 0.19 (95% CI 0.09-0.42; P < 0.001). Using propensity score matching, the HR for RFS was 0.45 (0.29-0.89, P = 0.021) and for OS 0.25 (0.09-0.69; P = 0.007).
Conclusions
Our study provides the first evidence that adjuvant platinum-based chemotherapy may be associated with prolonged recurrence-free and overall survival in patients with ACC and a very high risk for recurrence.
Background: The clinical signs of adrenal cortical insufficiency (incidence, ca. 25 per million per year; prevalence, ca. 400 per million) are nonspecific, and misdiagnoses are therefore common. Glucocorticoid substitution therapy has been in use for 50 years but is not a wholly adequate treatment. Our understanding of this disease remains incomplete in many ways.
Methods: We selectively searched the Medline database for publications on adrenal cortical insufficiency, with particular attention to studies from the year 2000 onward (search terms: "adrenal insufficiency" or "Addison's disease" or "hypopituitarism"). Results: Hydrocortisone substitution therapy is often given in doses of 10-25 mg/day, timed according to the circadian rhythm. Gastrointestinal and other, febrile infections account for 30-50% of life-threatening adrenocortical crises. Such crises affect 8 of 100 persons with adrenal cortical insufficiency per year and must be treated by the immediate administration of glucocorticoids and fluids. When persons with adrenal cortical insufficiency are acutely ill or are otherwise under unusual stress, they may need additional amounts of hydrocortisone, often in the range of 5-10 mg but occasionally as high as 200 mg. The sustained administration of excessive amounts of steroid can shorten patients' lives by several years. Inappropriate substitution therapy can cause other major medical conditions, such as metabolic syndrome and osteoporosis.
Conclusion: Important measures for the prevention of adrenocortical crises include improved care by treating physicians, education of patients and their families, the provision of emergency identifying documents, and the prescription of glucocorticoid emergency kits.
Background
Adrenalectomies are rare procedures especially in childhood. So far, no large cohort study on this topic has been published with data on to age distribution, operative procedures, hospital volume and operative outcome.
Methods
This is a retrospective analysis of anonymized nationwide hospital billing data (DRG data, 2009-2017). All adrenal surgeries (defined by OPS codes) of patients between the age 0 and 21 years in Germany were included.
Results
A total of 523 patient records were identified. The mean age was 8.6 ± 7.7 years and 262 patients were female (50.1%). The majority of patients were between 0 and 5 years old (52% overall), while 11.1% were between 6 and 11 and 38.8% older than 12 years. The most common diagnoses were malignant neoplasms of the adrenal gland (56%, mostly neuroblastoma) with the majority being younger than 5 years. Benign neoplasms in the adrenal gland (D350) account for 29% of all cases with the majority of affected patients being 12 years or older. 15% were not defined regarding tumor behavior. Overall complication rate was 27% with a clear higher complication rate in resection for malignant neoplasia of the adrenal gland. Bleeding occurrence and transfusions are the main complications, followed by the necessary of relaparotomy. There was an uneven patient distribution between hospital tertiles (low volume, medium and high volume tertile). While 164 patients received surgery in 85 different “low volume” hospitals (0.2 cases per hospital per year), 205 patients received surgery in 8 different “high volume” hospitals (2.8 cases per hospital per year; p<0.001). Patients in high volume centers were significant younger, had more extended resections and more often malignant neoplasia. In multivariable analysis younger age, extended resections and open procedures were independent predictors for occurrence of postoperative complications.
Conclusion
Overall complication rate of adrenalectomies in the pediatric population in Germany is low, demonstrating good therapeutic quality. Our analysis revealed a very uneven distribution of patient volume among hospitals.
Adrenocortical tumors are rare in children. This systematic review summarizes the published evidence on pediatric adrenocortical carcinoma (ACC) to provide a basis for a better understanding of the disease, investigate new molecular biomarkers and therapeutic targets, and define which patients may benefit from a more aggressive therapeutic approach. We included 137 studies with 3680 ACC patients (~65% female) in our analysis. We found no randomized controlled trials, so this review mainly reflects retrospective data. Due to a specific mutation in the TP53 gene in ~80% of Brazilian patients, that cohort was analyzed separately from series from other countries. Hormone analysis was described in 2569 of the 2874 patients (89%). Most patients were diagnosed with localized disease, whereas 23% had metastasis at primary diagnosis. Only 72% of the patients achieved complete resection. In 334 children (23%), recurrent disease was reported: 81% — local recurrence, 19% (n = 65) — distant metastases at relapse. Patients < 4 years old had a different distribution of tumor stages and hormone activity and better overall survival (p < 0.001). Although therapeutic approaches are typically multimodal, no consensus is available on effective standard treatments for advanced ACC. Thus, knowledge regarding pediatric ACC is still scarce and international prospective studies are needed to implement standardized clinical stratifications and risk-adapted therapeutic strategies.
The prevalence of cardiovascular diseases (CVD) increases dramatically with age. Nevertheless, most of the basic research in cardiology has been conducted on young healthy animals which may not necessarily reflect the situation observed in the clinic. The heart undergoes profound changes in elderly, including molecular alterations, myocardial hypertrophy, interstitial fibrosis and functional decline. To date, numerous approaches exist to explain mechanisms of the cardiac aging process whereupon inflammation and immune activity are of increasing interest. Myocardial aging is temporally associated with chronic low-grade systemic inflammation and accumulation of memory T-cells. However, a possible causal relationship between these two phenomena has not yet been investigated. Thus, aim of the present study was to assess how immunological mechanisms contribute to the myocardial aging process.
Herein, the healthy murine heart was found to harbor all major resident leukocyte populations, including macrophages (CD45+CD11b+Ly6G-), granulocytes (CD45+ CD11b+Ly6G+), T-cells (CD45+CD11b-CD3e+), B-cells (CD45+CD11b-B220+) at frequencies that largely surpass those found in skeletal muscles. Age-related structural alterations and functional impairment occur simultaneously with significant shifts of the tissue resident leukocyte composition. Gene expression analyses performed on bulk myocardial samples revealed higher expression levels of TNF and INF- suggesting that in situ inflammation plays a role in the myocardial aging process. Aging was furthermore accompanied by a significant increase in size and cellularity of mediastinal, heart draining lymph nodes (med LN). Moreover, the med LNs harvested from aged mice showed a strong accumulation of effector-memory T-cells (CD44+CD62L-), mainly exhibiting a pro-inflammatory phenotype (Foxp3-, TNF+, IFN- γ+). None of these alterations were observed in popliteal lymph nodes of aged mice, indicating that they might be site-specific.
Next, to go beyond mere associative evidence and examine underlying mechanisms, the myocardial aging process was comprehensively characterized in mice lacking B- (µMT) or CD4+ T-cells (CD4ko). Our analyses revealed that aged CD4+ T-cell-deficient, but not B-cell-deficient mice, exhibit a lower in situ inflammatory tone and preserved ventricular function, as compared to age-matched wild type controls. No differences in the expression levels of genes related to fibrosis were observed in the groups.
Taken together, the results of this study indicate that heart-directed immune responses may spontaneously arise in the elderly, even in the absence of a clear tissue damage or concomitant infection. The T-cell-mediated immunosenescence profile might be particularly associated with age-related myocardial inflammation and functional decline, but not with tissue remodeling. These observations might shed new light on the emerging role of T cells in myocardial diseases, which primarily affect the elderly population.
Dialysepatienten weisen eine hohe Anzahl kardiovaskulärer Ereignisse auf. Betrachtet man die häufigsten Todesursachen von Dialysepatienten, so fällt ein großer Teil in den kardiovaskulären Bereich. In dieser Arbeit wurde der Einfluss von Aldosteron und Cortisol auf kardiale und vaskuläre Ereignisse bei Dialysepatienten mit Diabetes mellitus untersucht. Dazu wurden Daten von 1255 Dialysepatienten mit Diabetes mellitus aus der Deutschen Diabetes Dialyse Studie analysiert.
In der vorliegenden Arbeit konnte gezeigt werden, dass mit erhöhten Aldosteronkonzentrationen ein signifikanter Anstieg des Risikos für plötzlichen Herztod (HR: 1.69; 95% CI: 1.06–2.69) einhergeht. Das Risiko an plötzlichem Herztod zu versterben war bei hohen Konzentrationen von Aldosteron und gleichzeitig vorliegenden hohen Konzentrationen von Cortisol noch deutlicher erhöht (HR: 2.86, 95% CI: 1.32–6.21). Ebenso war die Gesamtsterblichkeit signifikant erhöht bei Patienten, die hohe Aldosteron- und Cortisolkonzentrationen aufwiesen im Vergleich zu Patienten mit niedrigen Spiegeln beider Hormone (HR: 1.62, 95% CI: 1.01–2.62).
In dieser Arbeit konnte somit ein deutlicher Zusammenhang hoher Aldosteron- und Cortisolkonzentrationen mit plötzlichem Herztod und Gesamtsterblichkeit gezeigt werden.
Background: Sudden cardiac death is common and accounts largely for the excess mortality of patients on maintenance dialysis. It is unknown whether aldosterone and cortisol increase the incidence of sudden cardiac death in dialysis patients.
Methods and results: We analysed data from 1255 diabetic haemodialysis patients participating in the German Diabetes and Dialysis Study (4D Study). Categories of aldosterone and cortisol were determined at baseline and patients were followed for a median of 4 years. By Cox regression analyses, hazard ratios (HRs) were determined for the effect of aldosterone, cortisol, and their combination on sudden death and other adjudicated cardiovascular outcomes. The mean age of the patients was 66 ± 8 years (54% male). Median aldosterone was <15 pg/mL (detection limit) and cortisol 16.8 µg/dL. Patients with aldosterone levels >200 pg/mL had a significantly higher risk of sudden death (HR: 1.69; 95% CI: 1.06–2.69) compared with those with an aldosterone <15 pg/mL. The combined presence of high aldosterone (>200 pg/mL) and high cortisol (>21.1 µg/dL) levels increased the risk of sudden death in striking contrast to patients with low aldosterone (<15 pg/mL) and low cortisol (<13.2 µg/dL) levels (HR: 2.86, 95% CI: 1.32–6.21). Furthermore, all-cause mortality was significantly increased in the patients with high levels of both hormones (HR: 1.62, 95% CI: 1.01–2.62).
Conclusions: The joint presence of high aldosterone and high cortisol levels is strongly associated with sudden cardiac death as well as all-cause mortality in haemodialysed type 2 diabetic patients. Whether a blockade of the mineralocorticoid receptor decreases the risk of sudden death in these patients must be examined in future trials.
We report on 499 patients with severe aplastic anemia aged >= 50 years who underwent hematopoietic cell transplantation (HCT) from HLA-matched sibling (n = 275, 55%) or HLA-matched (8/8) unrelated donors (n =187, 37%) between 2005 and 2016. The median age at HCT was 57.8 years; 16% of patients were 65 to 77 years old. Multivariable analysis confirmed higher mortality risks for patients with performance score less than 90% (hazard ratio HR], 1.41; 95% confidence interval [CI], 1.03 to 1.92; P= .03) and after unrelated donor transplantation (HR, 1.47; 95% CI,1 to 2.16; P = .05). The 3-year probabilities of survival for patients with performance scores of 90 to 100 and less than 90 after HLA-matched sibling transplant were 66% (range, 57% to 75%) and 57% (range, 47% to 76%), respectively. The corresponding probabilities after HLA-matched unrelated donor transplantation were 57% (range, 48% to 67%) and 48% (range, 36% to 59%). Age at transplantation was not associated with survival, but grades II to IV acute graft-versus-host disease (GVHD) risks were higher for patients aged 65 years or older (subdistribution HR [sHR], 1.7; 95% confidence interval, 1.07 to 2.72; P= .026). Chronic GVHD was lower with the GVHD prophylaxis regimens calcineurin inhibitor (CNI) + methotrexate (sHR, .52; 95% CI, .33 to .81; P= .004) and CNI alone or with other agents (sHR, .27; 95% CI, .14 to .53; P < .001) compared with CNI + mycophenolate. Although donor availability is modifiable only to a limited extent, choice of GVHD prophylaxis and selection of patients with good performance scores are key for improved outcomes. (C) 2018 American Society for Blood and Marrow Transplantation. Published by Elsevier Inc. All rights reserved.
Im Rahmen der Suche nach genetischen Korrelaten für die Suszeptibilität für Herzrhythmusstörungen wurde man auf die Genfamilie mit der sogenannten Popey-Domäne aufmerksam.
Ein Gen aus dieser Familie ist das Popdc2-Gen, welches für Transmembranproteine codiert, die möglicherweise eine Rolle in der Zell-Adhäsion und Zell-Interaktion spielen. Diese fanden sich sowohl in adulten Mäusen als auch im Reizleitungssystem des menschlichen Herzens in höherer Dichte. Eine systemische elektrophyiologische Charakterisierung der Podpc2-Nullmutanten erbrachte normale AV-Überleitungseigenschaften und Sinusknotenerholzeit. Im Vergleich zu den Wildtyp-Mäusen zeigten die transgenen Tiere eine erhöhte ektope Aktivität im Ventrikel nach Katecholamin-Stimulation(z.B. Kammerflimmern), sowie öfter Vorhofflimmern nach Burstmanövern.
Arrhythmien konnten signifikant häufiger bei Popdc2-Knockout-Mäusen > 9 Monaten nachgewiesen werden, dies könnte auf eine altersabhängige Alteration hindeuten. Möglicherweise spielt das Popdc2-Gen eine wichtige Rolle in der Pathogenese des plötzlichen Herztods durch ventrikuläre Arrhythmien.
Hintergrund und Fragestellung
Die Entwöhnung von Beatmungsgeräten wird nicht immer auf der primär behandelnden Intensivstation abgeschlossen. Die Weiterverlegung in andere Behandlungseinrichtungen stellt einen sensiblen Abschnitt in der Behandlung und Rehabilitation des Weaningpatienten dar. Ziel der vorliegenden Studie war die Untersuchung des Überleitungsmanagements und des Interhospitaltransfers von Weaningpatienten unter besonderer Berücksichtigung der Dokumentationsqualität.
Methodik
Es erfolge eine retrospektive Datenanalyse eines Jahrs (2018) auf 2 Intensivstationen eines Universitätsklinikums. Eingeschlossen wurden alle beatmeten Patienten mit folgenden Tracerdiagnosen: COPD, Asthma, Polytrauma, Pneumonie, Sepsis, ARDS und Reanimation (Beatmung > 24 h).
Ergebnisse
Insgesamt konnten 750 Patienten in die Untersuchung eingeschlossen werden (Alter 64 [52, 8–76; Median, IQR]; 32 % weiblich). Davon waren 48 (6,4 %) Patienten zum Zeitpunkt der Verlegung nicht entwöhnt (v. a. Sepsis und ARDS). Die Routinedokumentation war bei den Abschnitten „Spontaneous Breathing Trial“, „Bewertung der Entwöhungsbereitschaft“ und „vermutete Entwöhnbarkeit“ ausreichend, um die Erfüllung der Parameter der S2k-Leitlinie „Prolongiertes Weaning“ adäquat zu beurteilen. Vorwiegend wurden diese Patienten mit Tracheostoma (76 %) in Rehabilitationskliniken (44 %) mittels spezialisierten Rettungsmitteln des arztbegleiteten Patiententransports verlegt (75 %).
Diskussion
Die Verlegung nicht entwöhnter Patienten nach initialem Intensivaufenthalt ist ein relevantes Thema für den Interhospitaltransfer. Die Routinedokumentation eines strukturierten Weaningprozesses ist in Kernelementen ausreichend, um den Weaningprozess lückenlos zu beschreiben. Dies ist für die Kontinuität in der Weiterbehandlung dieser Patienten von großer Bedeutung.
Kollagen Typ I, als wesentlicher Bestandteil der ECM, spielt eine entscheidende Rolle in der Wundheilung nach Myokardinfarkt. Zum einen ist eine ausreichende Narbenbildung zur Gewährleistung der Ventrikelstabilität notwendig, zum anderen führt eine überschießende Kollagensynthese mit interstitieller Fibrose des Myokards zu einer kontraktilen Dysfunktion des Ventrikels. Inwiefern sich eine Verminderung oder das Fehlen an Kollagen Typ I auf die Wundheilung und das Remodeling auswirkt, untersuchten wir am Modell der Osteogenesis Imperfecta Maus (OIM). 12-16 Wochen alte homozygote OIM Tiere, sowie heterozygote und homozygote Kontrollen, wurden einer Unterbindung der linken Koronararterie mit konsekutiven Myokardinfarkt (AMI) oder einer „Schein“- Infarzierung unterzogen. Echokardiographische Kontrollen der Ventrikelfunktion erfolgten am Tag vor, am Tag 1, Tag 8 und 8 Wochen nach AMI und „Schein“- Infarzierung, bevor wir die Tiere opferten. Das experimentelle Protokoll ex vivo zur Analyse der mechanischen Eigenschaften des Gewebes und des Kontraktionsverhaltens umfasste die Bestimmung der isometrischen Kraft und der Kraft- Frequenz- Beziehung. Außerdem wurden alle Herzen unabhängig vom Zeitpunkt des Todes histologisch aufgearbeitet 1. zur Infarktgrößenbestimmung, 2. zur immunhistologischen Bestimmung des Kollagengehalts und 3. zur Untersuchung der Todesursache bei vorzeitigem Tod. Vor Beginn der Studie fanden wir keine Unterschiede zwischen den OIM-/- und den Kontrollgruppen in ihrer Ventrikelfunktion. In der frühen Phase (Tag 3 bis 7) nach AMI war die Sterblichkeitsrate der OIM-/- aufgrund von Ventrikelrupturen signifikant erhöht verglichen mit den Kontrollen (54% OIM-/- vs. 13% WT). Wir konnten keine Abhängigkeit von der Infarktgrösse als ursächlichen Faktor auf das Entstehen einer Ruptur beobachten, da auch Tiere ohne makro- und mikroskopischen Nachweis eines Infarktes aus diesem Grund verstarben. Nach 8 Wochen präsentierten die OIM-/- eine signifikant niedrigere Dilatation des linken Ventrikels, sowie einen geringeren linksventrikulären Durchmesser verglichen mit den Kontrollgruppen. In den muskelphysiologischen Versuchen der isometrischen Kraftentwicklung konnte sowohl in der Infarkt- als auch in der Sham- Gruppe eine höhere maximale Kraft der OIM-/- verglichen mit den heterozygoten und homozygoten Kontrollen beobachtet werden. Zum Erreichen vergleichbarer Kraftniveaus war bei den homozygoten OIM eine signifikant grössere Vordehnung notwendig, was indirekt für eine höhere Gewebecompliance spricht. Der Kollagengehalt in der Infarktnarbe der OIM-/- war gegenüber den OIM+/- und WT Tieren signifkant erniedrigt. Keine Unterschiede in den drei Gruppen fanden sich in der Infarktgrössenentwicklung nach AMI.
One of the main problems we face with PPGL is the lack of molecular markers capable of predicting the development of metastases in patients. Telomere-related genes, such as TERT and ATRX, have been recently described in PPGL, supporting the association between the activation of immortalization mechanisms and disease progression. However, the contribution of other genes involving telomere preservation machinery has not been previously investigated. In this work, we aimed to analyze the prognostic value of a comprehensive set of genes involved in telomere maintenance. For this study, we collected 165 PPGL samples (97 non-metastatic/63 metastatic), genetically characterized, in which the expression of 29 genes of interest was studied by NGS. Three of the 29 genes studied, TERT, ATRX and NOP10, showed differential expression between metastatic and non-metastatic cases, and alterations in these genes were associated with a shorter time to progression, independent of SDHB-status. We studied telomere length by Q-FISH in patient samples and in an in vitro model. NOP10 overexpressing tumors displayed an intermediate-length telomere phenotype without ALT, and in vitro results suggest that NOP10 has a role in telomerase-dependent telomere maintenance. We also propose the implementation of NOP10 IHC to better stratify PPGL patients.
Morbus Fabry betrifft als lysosomale Speicherkrankheit viele Organsysteme durch die Ablagerung von Gb3 in verschiedenen Geweben. Besonders durch die Beteiligung von Nieren und Herz, wird die Lebenszeit von den Patienten häufig verkürzt. Eine Beschreibung konkreter klinischer Symptome, welche auch durch Allgemeinmediziner oder Zahnärzte erkannt werden könnten, könnte eine frühzeitigere Diagnose und damit frühzeitige Therapie ermöglichen. Besonders extraorale gesichtsspezifische Merkmale können von verschiedensten Gruppen von Ärzten erkannt werden.
Die extraorale Auswertung zeigte, wie in der Literatur beschrieben, das Vorkommen von periorbitaler Fülle, prominente Arcus superciliaris, eine kürzere und bullösere Nase. Die Auffälligkeiten waren besonders bei den Männern zu beobachten.
Die intraorale Auswertung wurde in dentale Auffälligkeiten und Ereignisse des Hart- und Weichgewebes eingeteilt. Bei den dentalen Ereignissen zeigte sich eine Diskrepanz zwischen der Kiefergröße und dem Zahnmaterial. So neigte das Patientenkollektiv eher zu einem Breitkiefer, was eine Erklärung für die multiplen Lücken im Frontzahnbereich der Patienten darstellt. An der Mundschleimhaut und perioral konnten vermehrt Angiokeratome und Teleangiektasien festgestellt werden, sowie das vermehrte Vorkommen von Exostosen. Speziell die Zunge der Patienten zeigte auch Auffälligkeiten in Form von einer subjektiven Makroglossie, einer Furchenzunge und Veränderungen der Papillen.
Die Auffälligkeiten in der Mundhöhle und im Kopf-Hals Bereich der Morbus Fabry Patienten sind, wie der Literatur beschrieben, vorhanden, jedoch stellen sie keine Schlüsselrolle in der Diagnose dar, da sie in allen Bereichen nur leichte Abweichungen oder Auffälligkeiten zeigen, welche nicht immer Auftreten und daher schwer zu diagnostizieren sind.
Background. Fast progression of the transaortic mean gradient (P-mean) is relevant for clinical decision making of valve replacement in patients with moderate and severe aortic stenosis (AS) patients. However, there is currently little knowledge regarding the determinants affecting progression of transvalvular gradient in AS patients. Methods. This monocentric retrospective study included consecutive patients presenting with at least two transthoracic echocardiography examinations covering a time interval of one year or more between April 2006 and February 2016 and diagnosed as moderate or severe aortic stenosis at the final echocardiographic examination. Laboratory parameters, medication, and prevalence of eight known cardiac comorbidities and risk factors (hypertension, diabetes, coronary heart disease, peripheral artery occlusive disease, cerebrovascular disease, renal dysfunction, body mass index >= 30 Kg/m(2), and history of smoking) were analyzed. Patients were divided into slow (P-mean < 5 mmHg/year) or fast (P-mean >= 5 mmHg/year) progression groups. Results. A total of 402 patients (mean age 78 +/- 9.4 years, 58% males) were included in the study. Mean follow-up duration was 3.4 +/- 1.9 years. The average number of cardiac comorbidities and risk factors was 3.1 +/- 1.6. Average number of cardiac comorbidities and risk factors was higher in patients in slow progression group than in fast progression group (3.3 +/- 1.5 vs 2.9 +/- 1.7; P = 0.036). Patients in slow progression group had more often coronary heart disease (49.2% vs 33.6%; P = 0.003) compared to patients in fast progression group. LDL-cholesterol values were lower in the slow progression group (100 +/- 32.6 mg/dl vs 110.8 +/- 36.6 mg/dl; P = 0.005). Conclusion. These findings suggest that disease progression of aortic valve stenosis is faster in patients with fewer cardiac comorbidities and risk factors, especially if they do not have coronary heart disease. Further prospective studies are warranted to investigate the outcome of patients with slow versus fast progression of transvalvular gradient with regards to comorbidities and risk factors.
Association of Autoimmune Addison's Disease with Alleles of STAT4 and GATA3 in European Cohorts
(2014)
Background: Gene variants known to contribute to Autoimmune Addison's disease (AAD) susceptibility include those at the MHC, MICA, CIITA, CTLA4, PTPN22, CYP27B1, NLRP-1 and CD274 loci. The majority of the genetic component to disease susceptibility has yet to be accounted for.
Aim: To investigate the role of 19 candidate genes in AAD susceptibility in six European case-control cohorts.
Methods: A sequential association study design was employed with genotyping using Sequenom iPlex technology. In phase one, 85 SNPs in 19 genes were genotyped in UK and Norwegian AAD cohorts (691 AAD, 715 controls). In phase two, 21 SNPs in 11 genes were genotyped in German, Swedish, Italian and Polish cohorts (1264 AAD, 1221 controls). In phase three, to explore association of GATA3 polymorphisms with AAD and to determine if this association extended to other autoimmune conditions, 15 SNPs in GATA3 were studied in UK and Norwegian AAD cohorts, 1195 type 1 diabetes patients from Norway, 650 rheumatoid arthritis patients from New Zealand and in 283 UK Graves' disease patients. Meta-analysis was used to compare genotype frequencies between the participating centres, allowing for heterogeneity.
Results: We report significant association with alleles of two STAT4 markers in AAD cohorts (rs4274624: P = 0.00016; rs10931481: P = 0.0007). In addition, nominal association of AAD with alleles at GATA3 was found in 3 patient cohorts and supported by meta-analysis. Association of AAD with CYP27B1 alleles was also confirmed, which replicates previous published data. Finally, nominal association was found at SNPs in both the NF-kappa B1 and IL23A genes in the UK and Italian cohorts respectively.
Conclusions: Variants in the STAT4 gene, previously associated with other autoimmune conditions, confer susceptibility to AAD. Additionally, we report association of GATA3 variants with AAD: this adds to the recent report of association of GATA3 variants with rheumatoid arthritis.
Family studies suggest a genetic component to the etiology of chronic kidney disease (CKD) and end stage renal disease (ESRD). Previously, we identified 16 loci for eGFR in genome-wide association studies, but the associations of these single nucleotide polymorphisms (SNPs) for incident CKD or ESRD are unknown. We thus investigated the association of these loci with incident CKD in 26,308 individuals of European ancestry free of CKD at baseline drawn from eight population-based cohorts followed for a median of 7.2 years (including 2,122 incident CKD cases defined as eGFR < 60ml/min/1.73m(2) at follow-up) and with ESRD in four case-control studies in subjects of European ancestry (3,775 cases, 4,577 controls). SNPs at 11 of the 16 loci (UMOD, PRKAG2, ANXA9, DAB2, SHROOM3, DACH1, STC1, SLC34A1, ALMS1/NAT8, UBE2Q2, and GCKR) were associated with incident CKD; p-values ranged from p = 4.1e-9 in UMOD to p = 0.03 in GCKR. After adjusting for baseline eGFR, six of these loci remained significantly associated with incident CKD (UMOD, PRKAG2, ANXA9, DAB2, DACH1, and STC1). SNPs in UMOD (OR = 0.92, p = 0.04) and GCKR (OR = 0.93, p = 0.03) were nominally associated with ESRD. In summary, the majority of eGFR-related loci are either associated or show a strong trend towards association with incident CKD, but have modest associations with ESRD in individuals of European descent. Additional work is required to characterize the association of genetic determinants of CKD and ESRD at different stages of disease progression.
1. Einleitung 2. Ziele der Untersuchung 3. Methodik 3.1. Versuchsvorbereitung 3.1.1. Narkose und Beatmung 3.1.2. Präparation 3.1.3. Koronarperfusion 3.2. Versuchsdurchführung 3.2.1. Versuchsprotokoll 3.2.2. Messparameter 3.3. Versuchsauswertung 3.3.1. Datenanalyse 3.3.2. Statistik 4. Versuchsergebnisse 4.1. Koronargefäße 4.1.1. Koronarer Blutfluß FRIVA 4.1.2. Koronarer Perfusionsdruck PCOR 4.1.3. Koronare Leitfähigkeit C 4.2. Myokardiale Kontraktilität 4.2.1. Zeitlich differenzierte maximale linksventrikuläre Druckänderung dP/ dtmax 4.2.2. Prozentuale myokardiale Segmentlängenverkürzung SL 4.3. Hämodynamik, Herzfrequenz und Erregungsausbreitung 4.3.1. Hämodynamik 4.3.2. Erregungsausbreitung 4.3.3. Herzfrequenz 5. Diskussion 5.1. Herzstimulation bei normaler Koronarperfusion 5.2. Herzstimulation bei reduzierter Koronarperfusion 5.3. Klinische Bedeutung 5.4. Limitationen 6. Zusammenfassung 7. Anhang 7.1. Abkürzungen 7.2. Tabellen 7.3. Abbildungsverzeichnis 8. Literaturverzeichnis Wir untersuchten die Auswirkungen linksventrikulärer Stimulationsorte und atrioventrikulärer Verzögerungszeiten auf die Herzfunktion unter normaler und reduzierter Koronarperfusion. An acht vollnarkotisierten herzgesunden Hunden wurde hierzu eine atrioventrikuläre Stimulation des rechten Vorhofs und linken Ventrikels mit einem kurzen (50 ms) und einem langen (80 ms) Stimulationsintervall knapp oberhalb der Eigenfrequenz durchgeführt. Die Stimulation erfolgte an zwei endokardialen linksventrikulären Stimulationsorten (basolateral und apikoseptal). In einem akuten Ischämiemodell wurde der Perfusionsdruck des RIVA extern graduell reduziert, um eine leichte (45-50 mmHg) und schwere Myokardischämie (35-40 mmHg) zu erzielen. Die regionale myokardiale Kontraktilität des RIVA-Versorgungsgebietes (SL) wurde mittels Ultraschallmeßkristallen und die globale myokardiale Kontraktilität (dP/dtmax) mittels Meßkatheter mit beiden AV-Stimulationsintervallen und Stimulationsorten unter normalen und ischämischen Bedingungen bestimmt. Zudem wurden der koronare Blutfluß des RIVA, die koronare Leitfähigkeit, linksventrikuläre und systemische Druckwerte sowie die QRS-Dauer ermittelt. Unter normaler Myokardperfusion zeigte sich trotz fehlender signifikanter Veränderungen tendentiell die stärkste regionale und globale myokardiale Kontraktilitätszunahme während der basolateralen Stimulation mit einem langen AV-Intervall, wohingegen für die übrigen Stimulationseinstellungen nur eine Abnahme der prozentualen Veränderung nachgewiesen werden konnte. Bei einer apikoseptalen Stimulation wurden unter einem langen AV-Intervall die geringsten Einschränkungen der Kontraktilität registriert. Signifikante Unterschiede hinsichtlich des koronaren Blutflusses, der Hämodynamik oder QRS-Dauer waren nicht nachweisbar. Bei leichter und schwerer Myokardischämie im RIVA-Perfusionsgebiet konnte durch eine basolaterale Stimulation mit einem kurzen AV-Intervall eine signifikante Zunahme der regionalen und globalen Kontraktion erzielt werden. Dieser Trend wurde durch entsprechende Ergebnisse des koronaren Blutflusses und der Hämodynamik bestätigt. Insbesondere ein Anstieg der enddiastolischen Drücke wies auf eine effiziente Steigerung der linksventrikulären Vorlast unter dieser Stimulation hin. Eine apikoseptale Stimulation hingegen, insbesondere mit kurzem AVIntervall, sollte nach unseren Ergebnissen vermieden werden. Als Ursache für die unterschiedlichen Auswirkungen der linksventrikulären Stimulation und reduzierten Koronarperfusion wurden Effekte der kardialen Erregungsleitung und Asynchronie, der AV-Synchronizität, der koronaren Flußreserve und Autoregulationsmechanismen der Koronargefäße diskutiert. Zusammenfassend konnte im Rahmen dieser Untersuchung nachgewiesen werden, dass die Auswahl des linksventrikulären Stimulationsortes und des AVsequentiellen Stimulationsintervalls relevante Auswirkungen auf die myokardiale Kontraktilität, den koronaren Blutfluß, die Hämodynamik und Erregungsausbreitung unter normaler und reduzierter Koronarperfusion hat. Bei normaler Koronarperfusion wurde die größte prozentuale Zunahme der regionalen und globalen myokardialen Kontraktilität unter basolateraler Stimulation mit langem AV-Intervall und bei reduzierter Koronarperfusion mit kurzem AV-Intervall gemessen. Unter apikoseptaler Stimulation führte hingegen ein längeres AV-Intervall zur geringeren Kontraktionsabnahme. Daher sollte in Abhängigkeit vom linksventrikulären Stimulationsort ein geeignetes AV-Intervall gewählt werden, um die linksventrikuläre Funktion unter ischämischen Bedingungen möglichst gut zu erhalten. Dies ist vor allem für Patienten, die an einer koronaren Herzerkrankung mit Linksherzinsuffizienz leiden und ein System zur linksventrikulären Stimulation erhalten sollen, von besonderer Bedeutung.
Die Todesrezeptoren Fas, TRAILR1 und TRAILR2 werden seit einigen Jahren aufgrund ihrer Fähigkeit, Apoptose zu induzieren, als therapeutisch interessantes Ziel bei der Therapie maligner Tumoren angesehen. Gleichzeitig werden immer mehr Entitäten von Tumoren beschrieben, die eine Resistenz gegen die Todesrezeptor-induzierte Apoptose aufweisen. In dieser Konstellation können neben den blockierten proapoptotischen Signalen insbesondere auch Todesrezeptor-assoziierte, protumoral wirksame Signalwege sichtbar werden, die unter anderen Umständen durch die Apoptose maskiert werden. In dieser Arbeit wurde die von FasL- und TRAIL-induzierte Signaltransduktion in einer apoptoseresistenten Variante der kolorektalen Karzinomzelllinie HCT116 untersucht. Eine aktivierende Mutation des PIK3CA-Gens protektiert diese Zellen aufgrund der konstitutiven Aktivierung des onkogenen PI3K/Akt-Signalweges gegenüber Todesrezeptor-vermittelter Apoptose. Durch Vergleich isogener Zelllinien, welche für den PIK3CA-Locus funktionell haploid waren und entweder ein Wildtyp oder ein mutiertes Allel trugen, konnte die Signaltransduktion von Fas und der TRAIL-Todesrezeptoren in apoptoseresistenten Tumorzellen, sowie deren Zusammenspiel mit dem PI3K/Akt-Signalweg im Detail untersucht werden. So wurde in dieser Arbeit gezeigt, dass nach Stimulation der HCT116 PIK3CA-mut protektierten Zellen mit FasL oder TRAIL die initialen Schritte der Apoptoseinduktion durch Todesrezeptoren bis hin zur Bildung des DISC und der Aktivierung von Caspase-8 ungestört vonstatten gehen. Der durch die PIK3CA-Mutation induzierte Schutzmechanismus muss deshalb unterhalb dieser frühen apoptoseinduzierenden Ereignisse wirksam werden. Darüber hinaus zeigte sich, dass Todesliganden in HCT116 PIK3CA-mut Zellen den proinflammatorischen NFκB-Signalweg aktivieren, wohingegen dieser Signalweg in HCT116 PIK3CA-wt Zellen durch die ablaufende Apoptose inhibiert wurde. Während HCT116 PIK3CA-wt Zellen nach Stimulation von Fas oder den TRAIL-Todesrezeptoren morphologisch die klassischen Anzeichen des apoptotischen Zelltods zeigten, veränderten die HCT116 PIK3CA-mut protektierten Zellen ihre Morphologie von einer mesenchymal-länglichen hin zu einer amöboid-abgerundeten Form, die Zellen blieben jedoch vital. Die Änderung der Zellmorphologie konnte mit dem Vorhandensein enzymatisch aktiver Casapse-8 verknüpft werden, generiert durch den Todesrezeptor-assoziierten DISC. Caspase-8 vermittelte die Reorganisation des Aktinzytoskeletts durch Spaltung und der damit einhergehenden Aktivierung von ROCK-1. Blockade der Caspase-8 Aktivierung in HCT116 PIK3CA-mut Zellen durch pharmakologische Inhibitoren oder ektope Überexpression von cFLIPS verhinderte entsprechend den FasL- oder TRAIL-induzierten Übergang zur amöboid-abgerundeten Zellform. Funktionell zeigten die amöboid-abgerundeten HCT116 PIK3CA-mut Zellen im Vergleich zu unstimulierten HCT116 PIK3CA-mut Zellen eine erhöhte Invasivität, was anhand erhöhter Spiegel an Urokinase im Überstand nachgewiesen werden konnte. Diese Arbeit beschreibt mit der Induktion einer amöboid-abgerundeten Zellmorphologie erstmals eine nicht-apoptotische Funktion von Caspase-8 im Kontext der Todesrezeptor-Signaltransduktion, die von der enzymatischen Aktivität abhängig ist. Weiterhin konnte ROCK-1 als Caspase-8 Substrat identifiziert werden. Ob durch die Aktivierung von ROCK-1 und die Reorganisation des Aktinzytoskeletts neben der Ausbildung einer amöboiden Zellmorphologie auch der amöboide Typ der Zellmigration in Gang gesetzt wird, müssen zukünftige Studien zeigen.
Der kathetergestützte Aortenklappenersatz nimmt auch bei Patienten mit niedrigem OP-Risiko einen zunehmend größeren Stellenwert zur Behandlung der hochgradigen Aortenklappenstenose ein.45 Umso wichtiger ist es, die einzelnen Schritte der Intervention zu optimieren. In einigen Arbeiten wurde bereits die Vordilatation als obsolet bezeichnet, da sie lediglich die OP-Zeit verlängere und Komplikationen wie Schlaganfälle und AV-Blockierungen begünstige.22,52,53,57,59 Ziel dieser Studie war es, die Vor- und Nachteile der Vordilatation zu untersuchen. Hierzu wurden 625 Patienten, die im Zeitraum von 2016-2020 eine TAVI am UKW erhielten, retrospektiv analysiert (323 mit, 302 ohne Vordilatation). Es wurden demographische sowie prä-, peri- und post-interventionelle Daten analysiert. Statistisch signifikante Unterschiede wurden bei den Schlaganfällen beobachtet (p=0,01), die mit 2,2% lediglich bei Patienten mit Vordilatation auftraten, sodass bei einem hohen Schlaganfallrisiko hierauf verzichtet werden sollte. Zusätzlich war in der Gruppe mit Vordilatation die passagere Schrittmacherabhängigkeit signifikant häufiger (p=0,01). Alle anderen Komplikationen waren nicht signifikant. In beiden Gruppen zeigte sich zu >95% ein Device-Success, sodass der Verzicht auf eine Prädilatation nicht mit einem schlechteren Outcome assoziiert und somit sicher ist.53,57,58,59,61
Die Auswertung der TTE-Daten zeigte, dass eine Prädilatation durchgeführt wurde, wenn die Klappe signifikant höhergradig stenosiert war (Pmean 50,17 vs. 46,79mmHG). Ferner wurde bei leichtgradigen Aortenklappeninsuffizienzen signifikant häufiger auf eine Vordilatation verzichtet (p=0,04). Eine Vordilatation kann also bei komplexeren anatomischen Verhältnissen sinnvoll sein, um einen optimalen Klappensitz zu gewährleisten.52,53 Nach TAVI zeigte sich die LV-EF in der Gruppe mit Prädilatation signifikant höher (p=0,002). Höhergradige Aortenklappeninsuffizienzen scheinen nicht durch eine Vordilatation begünstigt zu sein, die AI°II wurde nur bei 4 Patienten ohne Vordilatation beobachtet. In den postinterventionellen EKG-Daten zeigten sich in der Gruppe ohne Vordilatation signifikant häufiger Linksschenkelblöcke sowie ein AVB °II, Typ II, was vermutlich durch die fehlende Vorbereitung der Klappe und den damit assoziierten ungünstigeren Prothesensitz zu erklären ist.53 Die Nachdilatation wurde nicht durch eine vorausgegangene Vordilatation beeinflusst. Bezüglich der implantierten Klappenarten wurde die S3 Ultra signifikant häufiger bei Patienten ohne Vordilatation eingesetzt. Die in vielen Arbeiten beschriebene kürzere OP-Dauer ließ sich in dieser Studie nicht bestätigen.52,53,56 Stattdessen war bei TAVIs ohne Vordilatation die Eingriffsdauer im Schnitt 4min länger (p=0,11). Es bestätigte sich, dass bei einer Prädilatation signifikant mehr Kontrastmittel verwendet wurde (p=0,001) und die Strahlenbelastung höher war. Dies ist insbesondere für Patienten mit einer Niereninsuffizienz von Bedeutung.42 Ob eine Vordilatation durchgeführt wird, sollte also individuell aufgrund der Begleiterkrankungen und Risikofaktoren entschieden werden.
A deep integration of routine care and research remains challenging in many respects. We aimed to show the feasibility of an automated transformation and transfer process feeding deeply structured data with a high level of granularity collected for a clinical prospective cohort study from our hospital information system to the study's electronic data capture system, while accounting for study-specific data and visits. We developed a system integrating all necessary software and organizational processes then used in the study. The process and key system components are described together with descriptive statistics to show its feasibility in general and to identify individual challenges in particular. Data of 2051 patients enrolled between 2014 and 2020 was transferred. We were able to automate the transfer of approximately 11 million individual data values, representing 95% of all entered study data. These were recorded in n = 314 variables (28% of all variables), with some variables being used multiple times for follow-up visits. Our validation approach allowed for constant good data quality over the course of the study. In conclusion, the automated transfer of multi-dimensional routine medical data from HIS to study databases using specific study data and visit structures is complex, yet viable.
The first description of neuromyelitis optica by Eugène Devic and Fernand Gault dates back to the 19th century, but only the discovery of aquaporin-4 autoantibodies in a major subset of affected patients in 2004 led to a fundamentally revised disease concept: Neuromyelits optica spectrum disorders (NMOSD) are now considered autoantibody-mediated autoimmune diseases, bringing the pivotal pathogenetic role of B cells and plasma cells into focus. Not long ago, there was no approved medication for this deleterious disease and off-label therapies were the only treatment options for affected patients. Within the last years, there has been a tremendous development of novel therapies with diverse treatment strategies: immunosuppression, B cell depletion, complement factor antagonism and interleukin-6 receptor blockage were shown to be effective and promising therapeutic interventions. This has led to the long-expected official approval of eculizumab in 2019 and inebilizumab in 2020. In this article, we review current pathogenetic concepts in NMOSD with a focus on the role of B cells and autoantibodies as major contributors to the propagation of these diseases. Lastly, by highlighting promising experimental and future treatment options, we aim to round up the current state of knowledge on the therapeutic arsenal in NMOSD.
Purpose
Inhomogeneities of the static magnetic B\(_{0}\) field are a major limiting factor in cardiac MRI at ultrahigh field (≥ 7T), as they result in signal loss and image distortions. Different magnetic susceptibilities of the myocardium and surrounding tissue in combination with cardiac motion lead to strong spatio‐temporal B\(_{0}\)‐field inhomogeneities, and their homogenization (B0 shimming) is a prerequisite. Limitations of state‐of‐the‐art shimming are described, regional B\(_{0}\) variations are measured, and a methodology for spherical harmonics shimming of the B\(_{0}\) field within the human myocardium is proposed.
Methods
The spatial B\(_{0}\)‐field distribution in the heart was analyzed as well as temporal B\(_{0}\)‐field variations in the myocardium over the cardiac cycle. Different shim region‐of‐interest selections were compared, and hardware limitations of spherical harmonics B\(_{0}\) shimming were evaluated by calibration‐based B0‐field modeling. The role of third‐order spherical harmonics terms was analyzed as well as potential benefits from cardiac phase–specific shimming.
Results
The strongest B\(_{0}\)‐field inhomogeneities were observed in localized spots within the left‐ventricular and right‐ventricular myocardium and varied between systolic and diastolic cardiac phases. An anatomy‐driven shim region‐of‐interest selection allowed for improved B\(_{0}\)‐field homogeneity compared with a standard shim region‐of‐interest cuboid. Third‐order spherical harmonics terms were demonstrated to be beneficial for shimming of these myocardial B\(_{0}\)‐field inhomogeneities. Initial results from the in vivo implementation of a potential shim strategy were obtained. Simulated cardiac phase–specific shimming was performed, and a shim term‐by‐term analysis revealed periodic variations of required currents.
Conclusion
Challenges in state‐of‐the‐art B\(_{0}\) shimming of the human heart at 7 T were described. Cardiac phase–specific shimming strategies were found to be superior to vendor‐supplied shimming.
Balanced hydroxyethylstarch (HES 130/0.4) impairs kidney function in-vivo without inflammation
(2015)
Volume therapy is a standard procedure in daily perioperative care, and there is an ongoing discussion about the benefits of colloid resuscitation with hydroxyethylstarch (HES). In sepsis HES should be avoided due to a higher risk for acute kidney injury (AKI). Results of the usage of HES in patients without sepsis are controversial. Therefore we conducted an animal study to evaluate the impact of 6% HES 130/0.4 on kidney integrity with sepsis or under healthy conditions Sepsis was induced by standardized Colon Ascendens Stent Peritonitis (sCASP). sCASP-group as well as control group (C) remained untreated for 24 h. After 18 h sCASP+HES group (sCASP+VOL) and control+HES (C+VOL) received 50 ml/KG balanced 6% HES (VOL) 130/0.4 over 6h. After 24h kidney function was measured via Inulin- and PAH-Clearance in re-anesthetized rats, and serum urea, creatinine (crea), cystatin C and Neutrophil gelatinase-associated lipocalin (NGAL) as well as histopathology were analysed. In vitro human proximal tubule cells (PTC) were cultured +/- lipopolysaccharid (LPS) and with 0.1–4.0% VOL. Cell viability was measured with XTT-, cell toxicity with LDH-test. sCASP induced severe septic AKI demonstrated divergent results regarding renal function by clearance or creatinine measure focusing on VOL. Soleley HES (C+VOL) deteriorated renal function without sCASP. Histopathology revealed significantly derangements in all HES groups compared to control. In vitro LPS did not worsen the HES induced reduction of cell viability in PTC cells. For the first time, we demonstrated, that application of 50 ml/KG 6% HES 130/0.4 over 6 hours induced AKI without inflammation in vivo. Severity of sCASP induced septic AKI might be no longer susceptible to the way of volume expansion
Die ETiCS-Studie (Etiology, Titre-Course, and effect on Survival) ist die bisher größte prospektive europäische Studie, die Ursachen und Entstehungsmechanismen kardialer Autoimmunphänomene untersucht. Ziel dieser Dissertation war die umfassende Charakterisierung der beiden prospektiven ETiCS-Kollektive sowie der Vergleich ihrer demographischen, klinischen, laborchemischen und apparativen Charakteristika zum Zeitpunkt des Studieneinschlusses. Die prospektive ETiCS-Studie umfasste im FAMI-Kollektiv (erster akuter Myokardinfarkt) insgesamt n=180 Patienten und im AMitis-Kollektiv (erste akute Myokarditis) n=96 Patienten. Die demographischen Daten, das kardiovaskuläre Risikoprofil sowie die klinische Symptomatik unserer Patienten entsprachen im Wesentlichen den in der Literatur bereits beschriebenen ähnlichen Vergleichskollektiven, mit dem interessanten Unterschied, dass unsere Infarkt-Patienten deutlich jünger waren (57 ± 8 Jahre), als der Durchschnittspatient mit erstmaligem Myokardinfarkt. Als Schlussfolgerung dieser Arbeit für die klinische Praxis lässt sich durch akribische Erhebung der Anamnese und des kardiovaskulären Risikoprofils eines Patienten mit unklaren kardialen Beschwerden mit einer gewissen Wahrscheinlichkeit ein akuter Myokardinfarkt oder eine akute Myokarditis vorhersagen. Das führende klinische Symptom ist mit Thoraxschmerz und Dyspnoe bei beiden Krankheitsbildern recht ähnlich, jedoch sollte bei führender Belastungsdyspnoe und zeitgleich typischen Nebenkriterien (Fieber, Palpitationen, Infektanamnese) primär an eine Myokarditis gedacht werden. Anhand der Ischämiemarker ist der Ausschluss einer akuten Myokardischämie oder einer akuten Herzmuskelentzündung zwar mit großer Sicherheit möglich, bei erhöhten Werten muss jedoch für eine weitere Differenzierung auch die Klinik, die EKG-Diagnostik und die Echokardiographie mit betrachtet werden. Auch bei nicht eindeutigem EKG-Befund sollte die Indikation zur Koronarangiographie nur in Zusammenschau der genannten Befunde gestellt werden. Sobald sich jedoch der Verdacht auf ein akutes Infarktgeschehen erhärtet, sollte ohne Zeitverzögerung eine invasive Diagnostik erfolgen.
Die lysosomale Speichererkrankung Morbus Fabry wird X-chromosomal rezessiv vererbt und führt durch eine Mutation des α-Galactosidase A-Gens zu einer fehlerhaften Kodierung des α-Galactosidase A Enzyms. Die folgliche Akkumulation von Glykosphingolipiden, vorwiegend Gb-3 und Lyso-Gb-3 in den Lysosomen der Zellen verschiedener Organe sorgen dort für irreversible Schädigungen. Klinisch werden von klassisch betroffenen Männern, bis zu nicht klassisch und teilweise völlig asymptomatischen Frauen, eine Vielzahl an unterschiedlichen Phänotypen detektiert. Insbesondere die Zellen des Herzens, der Niere, des Gefäßsystems, des Nervensystems und auch der Cornea sind betroffen. Deshalb stellen die Krankheitsbilder der Herzinsuffizienz, fortschreitendes Nierenversagen und cerebrovaskuläre Ereignisse keine Seltenheit dar. Neben der im Jahr 2001 zugelassenen Enzymersatztherapie, besteht seit 2016 die Möglichkeit einer Chaperontherapie mit Migalastat für bestimmte Genotypen. Aktuell sind für die ERT die Produkte Agalsidase alfa (Replagal) mit einer Dosis von 0,2 mg/kg KG und Agalsidase beta (Fabrazyme) mit einer Dosis von 1,0 mg/kg KG beziehungsweise 0,3 mg/kg KG verfügbar. Der perfekte Therapiebeginn und die optimale Dosis sind Gegenstand aktueller Forschung. Nachdem von 2009 bis 2012 ein Agalsidase beta Lieferengpass bestand, mussten viele Patienten unter Agalsidase beta Therapie auf Agalsidase alfa umgestellt werden. Bisherige Studien deuteten bei einem Wechsel zu Agalsidase alfa auf eine Abnahme der eGFR und eine Zunahme Fabry bezogener Schmerzen hin. Außerdem wurde bei einem Zurückwechseln zu Agalsidase beta ein Sinken der Plasma Lyso-Gb-3 Spiegel beobachtet. Da jedoch die Langzeiteffekte dieser Therapieumstellung noch unbeleuchtet waren, war es nun an der Zeit, mit dieser Arbeit Langzeitfolgen klinischer Stabilität und Sicherheit bei Patienten unter Dosisumstellung von Agalsidase alfa zu Agalsidase beta („switch“) und solchen mit folgendem Zurückwechseln auf Agalsidase beta („re-switch“) zu untersuchen. Von den 89 Studienteilnehmern aus drei verschiedenen Fabry Zentren in Deutschland zu Beginn konnten 78 Patienten am Ende des > 80 monatigen Bobachtungszeitraumes mit einer Baseline und zwei Follow-up Untersuchungen analysiert werden. Die Zuteilung zu den drei Gruppen „re-switch“, „switch“ und „regular Agalsidase beta“ erfolgte je nach individuellem Therapieplan. Der Fokus der Studie lag auf den Langzeitdaten der Nierenfunktion, klinischen Symptomen und Ereignissen und der Plasma Lyso-Gb-3 Entwicklung. Patienten der „re-switch“ Gruppe starteten zur Baseline mit den schlechtesten eGFR Werten. Während die eGFR der Teilnehmer mit regulärer Dosis stabil schien, verzeichnete sich in den „switch“ und „re-switch“ Gruppen eine signifikante Abnahme. Der eGFR-Rückgang war dabei bei den „switch“ Patienten am stärksten. Im Geschlechtervergleich zeigten die Männer aller drei Gruppen jährlich signifikante eGFR Einbußen zum zweiten Follow-up. Unterschiede in ernsthaften klinischen Ereignissen der Gruppen wurden nicht beobachtet. Gastrointestinale Beschwerden und Fabry bezogene Schmerzen verschlimmerten sich in der „re-switch“ Gruppe nach Wechsel zu Agalsidase alfa und konnten durch Zurückwechseln zu Agalsidase beta wieder gebessert werden. Nachdem die Lyso-Gb-3 Spiegel der „switch“ Gruppe konstant am höchsten waren, konnten diese bei den „re-switch“ Patienten nach einem Zurückwechseln zu Agalsidase beta signifikant gesenkt werden. Korrespondierend mit den vorherigen Studien konnte bestätigt werden, dass ein Wechsel von Agalsidase beta zu Agalsidase alfa im Allgemeinen sicher ist. Da aus den Daten nicht geschlussfolgert werden kann, dass Agalsidase beta das bessere Medikament ist, sollte die Wahl des Enzympräparates nach wie vor auf individueller Basis erfolgen. Dennoch suggerieren die Daten eine bessere biochemische Antwort unter höheren Enzymdosen, nach einem Zurückwechseln zu Agalsidase beta. Eine repräsentative Optimierung der Nierenfunktion vor allem bei den Männern gelang nicht. Die Symptomverbesserung war am ehesten auf einen dosisabhängigen Enzymeffekt für die Beseitigung von Gb-3 Einschlüssen zurückzuführen. Obwohl auch für die Reinigung von Gb-3 Einschlüssen der Niere eine solche Wirkung nachgewiesen wurde, deutet der signifikante Verlust der Nierenfunktion der Männer auf einen bereits gestarteten inflammatorischen Prozess hin, welcher auch durch höhere Dosen unbeeinflusst blieb. Eine Lösung könnte eine frühere, noch vor dem Beginn der Inflammation startende ERT-Initiierung sein. Diese Überlegung und mögliche anti-inflammatorische Therapiestrategien sollten mit zukünftigen Studien geklärt werden.
Bei den primär herzgesunden Tieren wurde durch Frequenz-Überstimulation mit Hilfe eines implantierten biventrikulären Herzschrittmachers eine chronische Herzinsuffizienz induziert. Im Rahmen der Verlaufsbeobachtungen wurde in-vivo die Druckanstiegsgeschwindigkeit dP/dtmax, der enddiastolische sowie endsystolische Druck durch einen implantierten Drucksensor gemessen. Anhand der gemessen dP/dtmax-, EDP- und ESP-Werte konnte der Bowditcheffekt dargestellt werden. Mit Ausprägung einer chronischen Herzinsuffizienz fiel dieser im Verlauf deutlich geringer aus, blieb aber stets nachweisbar.
Im Rahmen dieser Studie haben wir untersucht, ob die bei der diagnostischen Koronarangiographie gewählten Projektionen eine adäquate Darstellung der ostialen Gefäßabschnitte ermöglichen. Hierzu wurde im Rahmen einer retrospektiven Studie ein Patientenkollektiv von 54 Probanden eingeschlossen, bei denen sowohl ein Kardio-CT als auch eine diagnostische Herzkatheteruntersuchung durchgeführt worden war. Mithilfe des Kardio-CTs wurde die Line of Perpendicularity (LoP) der ostialen Koronargefäßabschnitte der LCA und der RCA ermittelt. Hieraus können die optimalen Angulationen für die angiographische Darstellung der ostialen Gefäßabschnitte abgeleitet werden. Im nächsten Schritt wurde überprüft, ob die während der diagnostischen Koronarangiographie gewählten Projektionen auf dieser LoP (mit einer Divergenz von ± 10°) lagen. Zusätzlich haben wir untersucht, ob interventionell erfahrenen Kardiologen in der Lage sind, die Koronarangiographie im Hinblick auf die Qualität der Darstellung des Ostiums zu beurteilen. Ferner wurde verglichen, ob die in der Literatur empfohlenen Standardprojektionen eine optimale Darstellung der ostialen Segmente erlauben. Bei 81% aller Patienten wurde der ostiumnahe Abschnitt der linken Koronararterie unverkürzt dargestellt, wohingegen die Darstellung der rechten Koronararterie nur bei 44% der Patienten adäquat war.
Der Vergleich der LoP zeigte, dass es große interindividuelle Unterschiede der Koronarostiumanatomie gibt. Daraus kann abgeleitet werden, dass mit sog. „Standardprojektionen“ nur bei einem Teil der Patienten eine optimale und somit unverkürzte Darstellung der ostialen Koronarsegmente möglich wird. Bei einem beträchtlichen Anteil der Patienten muss man diese Projektionen variieren, um das Ostium bestmöglich darzustellen. Eine CT-basierte Bestimmung der Line of Perpendicularity kann dazu beitragen, die geeigneten Projektionen während einer Herzkatheteruntersuchung einzustellen und so die interindividuellen Verhältnisse der Koronaranatomie zu berücksichtigen.
Einleitung: Die linksventrikuläre diastolische Dysfunktion (LVDD) ist bei Diabetikern noch vor Entwicklung einer klinisch apparenten Herzinsuffizienz eines der ersten Anzeichen einer kardialen Beteiligung. Daher soll in dieser Studie untersucht werden, ob die LVDD mit ECG-gated F-18-FDG PET in einem Diabetes-Rattenmodell dargestellt werden kann.
Methodik: Es wurden F-18-FDG PET Scans in einem Typ-2-Diabetes Rattenmodell (ZDF fa/fa, n=6) und in ZL Kontrollen (n=6) vorgenommen (Alter, jeweils 13 Wochen). Unter Hyperinsulinemic-Euglycemic Clamp-Technik wurden 37 MBq 18F-FDG über die Schwanzvene appliziert. 15-35 Minuten nach Tracergabe wurden mittels eines Kleintier-PET-Scanners sowie unter EKG-Ableitung PET Scans angefertigt (16 frames/cardiac cycle). Die linksventrikuläre Ejektionsfraktion (EF) und die Peak Füllrate (PFR) wurden mittels einer geeigneten Software (Heart Function View) gemessen, wobei die Software an die Größe des Rattenherzes angepasst wurde.
Ergebnisse: Im Alter von 13 Wochen entwickeln ZDF Diabetes-Ratten eine im Vergleich zu Kontrolltieren eine signifikante myokardiale Hypertrophie, bestätigt durch post-mortem Analyse des Herzgewichtes (994±78mg vs. 871±44mg in ZDF Diabetes-Ratten vs. ZL Kontrollen, p<0.01). ECG-gated PET zeigte eine signifikante Abnahme der LV diastolischen PFR (10.4±0.5 vs. 11.8±0.4 EDV/sec in ZDF Diabetes-Ratten vs. ZL Kontrollen, p<0.001), jedoch zeigte sich kein signifikanter Unterschied zwischen LVEF und der Herzfrequenz in den untersuchten ZDF Diabetes-Ratten und Kontrollen (LVEF: 60.0±4.5 vs. 63.7±4.1%, n.s. und HR: 305±25 vs. 323±24 bpm, n.s.).
Schlussfolgerung: Im Diabetes-Ratten-Modell kann unter Verwendung eines ECG-gated FDG-PET Protokolls die diastolische Dysfunktion als Parameter der frühen diabetischen Kardiomyopathie nachgewiesen werden.
Protein binding prevents uremic toxins from removal by conventional extracorporeal therapies leading to accumulation in maintenance dialysis patients. Weakening of the protein binding may enhance the dialytic elimination of these toxins. In ultrafiltration and equilibrium dialysis experiments, different measures to modify the plasma binding affinity and capacity were tested: (i), increasing the sodium chloride (NaCl) concentration to achieve a higher ionic strength; (ii), increasing the temperature; and (iii), dilution. The effects on the dissociation constant K-D and the protein bound fraction of the prototypical uremic toxin indoxyl sulfate (IS) in plasma of healthy and uremic individuals were studied. Binding of IS corresponded to one site binding in normal plasma. K-D increased linearly with the NaCl concentration between 0.15 (K-D = 13.2 +/- 3.7 mu M) and 0.75 M (K-D = 56.2 +/- 2.0 mu M). Plasma dilution further reduced the protein bound toxin fraction by lowering the protein binding capacity of the plasma. Higher temperatures also decreased the protein bound fraction of IS in human plasma. Increasing the NaCl concentration was effective to weaken the binding of IS also in uremic plasma: the protein bound fraction decreased from 89% +/- 3% to 81% +/- 3% at 0.15 and 0.75 M NaCl, respectively. Dilution and increasing the ionic strength and temperature enhance the free fraction of IS allowing better removal of the substance during dialysis. Applied during clinical dialysis, this may have beneficial effects on the long-term outcome of maintenance dialysis patients.
Background: Eosinophils appear to contribute to the efficacy of immunotherapy and their frequency was suggested as a predictive biomarker. Whether this observation could be transferred to patients treated with targeted therapy remains unknown. Methods: Blood and serum samples of healthy controls and 216 patients with advanced melanoma were prospectively and retrospectively collected. Freshly isolated eosinophils were phenotypically characterized by flow cytometry and co-cultured in vitro with melanoma cells to assess cytotoxicity. Soluble serum markers and peripheral blood counts were used for correlative studies. Results: Eosinophil-mediated cytotoxicity towards melanoma cells, as well as phenotypic characteristics, were similar when comparing healthy donors and patients. However, high relative pre-treatment eosinophil counts were significantly associated with response to MAPKi (p = 0.013). Eosinophil-mediated cytotoxicity towards melanoma cells is dose-dependent and requires proximity of eosinophils and their target in vitro. Treatment with targeted therapy in the presence of eosinophils results in an additive tumoricidal effect. Additionally, melanoma cells affected eosinophil phenotype upon co-culture. Conclusion: High pre-treatment eosinophil counts in advanced melanoma patients were associated with a significantly improved response to MAPKi. Functionally, eosinophils show potent cytotoxicity towards melanoma cells, which can be reinforced by MAPKi. Further studies are needed to unravel the molecular mechanisms of our observations.
Spiroergometrische Dauerbelastung von Probanden mit Morbus Addison, Diabetes mellitus Typ 1, Polyglandulärem Autoimmunsyndrom Typ 2 (erkrankt sowohl an Mb. Addison als auch an Diabetes mellitus Typ1) und gesunden Kontrollen. Blutzuckerverlauf, hormonelle Gegenregulation und kognitive Leistungsfähigkeit vor und nach Belastung wurden gemessen.
Während einer spiroergometrischen Dauerbelastung von 23 Minuten zeigte sich bei keinem der 10 Probanden mit ausschließlich Morbus Addison eine Neigung zur Hypoglykämie trotz fehlender Einnahme der mittäglichen Glukokortikoiddosis. Die Blutzucker blieben bei sämtlichen Probanden stabil und es zeigte sich sogar ein leichter Anstieg in der der Ergometrie anschließenden Nachbeobachtungsphase, eventuell als Hinweis auf eine mögliche Entwicklung einer Inulin-Resistenz.
Auf die erwartungsgemäße Mindersekretion von Adrenalin zeigte sich eine ame ehesten kompensatorisch leicht höhere Sekretion von Noradrenalin als bei den nebennierengesunden Gruppen. Die übrige Sekretion gegenregulatorischer Hormone entsprach den Vergleichsgruppen.
Die geleistete Arbeit am Fahrradergometer war bei den Probandengruppen mit Morbus Addison und APS 2 nahezu identisch, die Morbus Addison – Probanden traten sogar minimal weniger Ergometerwiderstand über die 15 Minuten Dauerbelastung. Dennoch zeigten die Probanden mit ausschließlich M. Addison einen adäquaten Anstieg der gegenregulatorischen Hormone ohne starke Schwankungen der Plasmaglukose, wohingegen es bei den Probanden mit APS 2, zu einem deutlichen Abfall der Plasmaglukose kam trotz deutlich niedrigerer Insulinkonzentrationen im Vergleich zur Probandengruppe mit ausschließlich Diabetes mellitus Typ 1. Die unzureichende Sekretion von Adrenalin, sowie der geringste Konzentrationsanstieg von Noradrenalin und dieser Untersuchung auch Wachstumshormon aller Probandengruppen verhinderte einen adäquaten Wiederanstieg des Blutzuckers.
Die Probanden mit Nebennierenrindeninsuffizienz verzeichneten teils signifikant schlechtere Ergebnisse bei einem Konzentrations- und einem Kurzzeitgedächtnistest im direkten Anschluss an die Ergometrie im Vergleich mit den anderen Probandengruppen.
Es gab keine relevanten Unterschiede der Testergebnisse in Ruhe. Die nebenniereninsuffizienten Probanden verbesserten sich jedoch signifikant weniger nach der Ergometrie bzw. zeigten nach dem Dauertest teils sogar schlechtere Leistungen. Die Probandengruppen mit Diabetes mellitus Typ 1 und die Kontrollgruppe zeigten eine erwartungsgemäße Verbesserung ihrer Leistung als Reaktion auf die vorherige körperliche Aktivität. Die Unterschiede in der kognitiven Performance sind am ehesten mit der unzureichenden Adrenalinsekretion und einem fehlenden akuten Cortisolanstieg der nebenniereninsuffizienten Probanden zu erklären.
Die Probanden mit Nebennierenrindeninsuffizienz wurden mit signifikant niedrigeren Widerständen am Fahrradergometer belastet als die nebennierengesunden Probanden. Ein möglicher Erklärungsansatz hierfür könnte eine gewisse cortisonbedingte Myopathie sein. Dies verdeutlicht nochmals die Notwendigkeit der Optimierung der Glukokortikoidsubstitutionstherapie. Neue Substitutionsregime sollten möglichst die physiologische circadiane Sekretionsrhythmik besser imitieren und im Optimalfall die Tagesdosis an Hydrocortison reduzieren, um glukokortikoidbedingte Nebenwirkungen wie Myopathie und Insulin-Resistenz zu reduzieren.
Die Probanden mit polyglandulärem Autoimmunsyndrom Typ 2, welche sowohl an Morbus Addison als auch an Diabetes mellitus Typ 1 leiden, müssen im Rahmen von Patientenschulungen besonders auf das Risiko von Hypoglykämien bei vermehrter körperlicher Aktivität hingewiesen werden. Patienten mit Insulinpumpe sollten das Ausschalten währenddessen erwägen und darüber hinaus besondere Aufmerksamkeit auf die Einnahme einer zusätzlichen Kohlenhydrateinheit für den Sport walten lassen. Eine zusätzliche Einnahme des Glukokortikoids ist in diesem Zusammenhang nicht sinnvoll. [31]
Ein vor dem Sport beispielsweise inhalativ appliziertes Epinephrinpräparat wäre eine mögliche Strategie zur Verbesserung des Plasmaglukose-Outcomes nach sportlicher Betätigung auf moderatem bzw. hohem Anstrengungslevel bei Patienten mit Morbus Addison und Diabetes mellitus Typ 1 und sollte Gegenstand weiterführender Studien sein.
Patients affected by gastroenteropancreatic–neuroendocrine tumors (GEP–NETs) have an increased risk of developing osteopenia and osteoporosis, as several factors impact on bone metabolism in these patients. In fact, besides the direct effect of bone metastasis, bone health can be affected by hormone hypersecretion (including serotonin, cortisol, and parathyroid hormone-related protein), specific microRNAs, nutritional status (which in turn could be affected by medical and surgical treatments), and vitamin D deficiency. In patients with multiple endocrine neoplasia type 1 (MEN1), a hereditary syndrome associated with NET occurrence, bone damage may carry other consequences. Osteoporosis may negatively impact on the quality of life of these patients and can increment the cost of medical care since these patients usually live with their disease for a long time. However, recommendations suggesting screening to assess bone health in GEP–NET patients are missing. The aim of this review is to critically analyze evidence on the mechanisms that could have a potential impact on bone health in patients affected by GEP–NET, focusing on vitamin D and its role in GEP–NET, as well as on factors associated with MEN1 that could have an impact on bone homeostasis.