Klinik und Poliklinik für Psychiatrie, Psychosomatik und Psychotherapie
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Institute
- Klinik und Poliklinik für Psychiatrie, Psychosomatik und Psychotherapie (492)
- Graduate School of Life Sciences (29)
- Institut für Psychologie (27)
- Klinik und Poliklinik für Kinder- und Jugendpsychiatrie, Psychosomatik und Psychotherapie (26)
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- Lehrstuhl für Molekulare Psychiatrie (9)
- Institut für Klinische Epidemiologie und Biometrie (6)
- Physiologisches Institut (6)
Sonstige beteiligte Institutionen
- Clinical Trial Center (CTC) / Zentrale für Klinische Studien Würzburg (ZKSW) (2)
- Department of Nuclear Medicine, Kanazawa University (1)
- Institut für Biopsychologie, Universität Dresden (1)
- Institut für Neurowissenschaften der Universität Mailand (1)
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- Johns Hopkins School of Medicine, Baltimore, MD, U.S. (1)
- Johns Hopkins University School of Medicine (1)
- Maastricht University, Department of Psychiatry and Neuropsychology (1)
- Translationale soziale Neurowissenschaften (1)
ResearcherID
- N-8985-2015 (1)
Behavioral variant frontotemporal dementia (bvFTD) is characterized by deep alterations in behavior and personality. Although revised diagnostic criteria agree for executive dysfunction as most characteristic, impairments in social cognition are also suggested. The study aimed at identifying those neuropsychological and behavioral parameters best discriminating between bvFTD and healthy controls. Eighty six patients were diagnosed with possible or probable bvFTD according to Rascovsky et al. (2011) and compared with 43 healthy age-matched controls. Neuropsychological performance was assessed with a modified Reading the Mind in the Eyes Test (RMET), Stroop task, Trail Making Test (TMT), Hamasch-Five-Point Test (H5PT), and semantic and phonemic verbal fluency tasks. Behavior was assessed with the Apathy Evaluation Scale, Frontal Systems Behavioral Scale, and Bayer Activities of Daily Living Scale. Each test’s discriminatory power was investigated by Receiver Operating Characteristic curves calculating the area under the curve (AUC). bvFTD patients performed significantly worse than healthy controls in all neuropsychological tests. Discriminatory power (AUC) was highest in behavioral questionnaires, high in verbal fluency tasks and the RMET, and lower in executive function tests such as the Stroop task, TMT and H5PT. As fluency tasks depend on several cognitive functions, not only executive functions, results suggest that the RMET discriminated better between bvFTD and control subjects than other executive tests. Social cognition should be incorporated into diagnostic criteria for bvFTD in the future, such as in the International Classification of Diseases (ICD)-11, as already suggested in the Diagnostic and Statistical Manual for Mental Disorders (DSM)-5.
Nalmefene is approved for as-needed pharmacological treatment in alcohol use disorder (AUD) by the European Medicines Agency. While the cellular effects of nalmefene have been thoroughly investigated, data are very limited on how this agent influences neural signals associated with inhibitory control and the visual analysis of environmental cues. This double-blind crossover study assessed the behavioral and neural effects of acute nalmefene administration in patients diagnosed with AUD. In experiment 1, we validated our experimental paradigm (electroencephalography combined with a modified Go/NoGo task using images of alcoholic and nonalcoholic drinks as prime stimuli) in 20 healthy adults to ensure that our protocol is suitable for assessing the behavioral and neural aspects of executive control. In experiment 2, we recruited 19 patients with AUD, and in a double-blind crossover design, we investigated the effects of nalmefene versus placebo on task performance (response accuracy, the sensitivity index, and reaction times), visual responses to appetitive cues (occipital P1, N1, and P2 components), and electrophysiological markers of conflict detection and response inhibition (frontal N2 and P3 waveforms). Under placebo, patients produced faster reaction times to alcohol-primed Go stimuli, an effect that was weak despite being statistically significant. However, the effect of alcoholic cues on the speed of response initiation disappeared after receiving nalmefene. We found no placebo versus nalmefene difference regarding our patients’ ability to accurately inhibit responses to NoGo stimuli or for occipital and frontal event-related potentials. Our results suggest that nalmefene might be potent in reducing the vigor to act upon alcoholic cues in AUD patients, but this effect is most probably mediated via subcortical (rather than cortical) neural circuits.
FKBP5 stellt im Stresssystem der HPA-Achse ein zentrales Gen bei der Regulation der Sensitivität des Glukokortikoidrezeptors und somit der Reaktion auf Stress dar. Zur Adaptation an Umwelteinflüsse ist es selbst in ein komplexes System von Regulationsmechanismen eingebettet, die unter anderem epigenetische Modifikationen in Form von DNA-Methylierung umfassen. Bisherige Studien legen eine starke Assoziation von FKBP5 zu stressinduzierten psychischen Erkrankungen nahe und weisen auf eine Dysregulation der HPA-Achse als möglichen Pathomechanismus hin. Für die enge klinische Interaktion von Depression und Herzinsuffizienz sowie eine ebenfalls vermutete Rolle der HPA-Achse in der Pathogenese letzterer, könnte FKBP5 daher ein entscheidendes Bindeglied darstellen. Gleichzeitig bietet die Identifikation einer über FKBP5 ausgedrückten Dysregulation der HPA-Achse einen biologischen Befund, der als Marker für das Ansprechen einer antidepressiven Therapie herangezogen werden könnte. Ziel dieser Arbeit war daher die Untersuchung eines möglichen Einflusses regulatorischer Parameter von FKBP5 auf die Herzinsuffizienz sowie eine Prüfung dieser als mögliche Biomarker für einen Erfolg der antidepressiven Therapie.
Dazu wurden Blutproben von ProbandInnen der GEParD- bzw. DaCFail-Studie mit Depression, Herzinsuffizienz sowie gesunde Kontrollen untersucht. Durch Pyrosequenzierung bisulfitkonvertierter DNA erfolgte die Bestimmung der Methylierung regulatorischer CpGs. Die Messung der relativen mRNA-Expression erfolgte durch den Einsatz einer qPCR.
In der Auswertung fand sich keine differentielle mRNA-Expression oder Methylierung zwischen den vier Untersuchungsgruppen. Allerdings reagierten depressive PatientInnen verglichen mit der Kontrollgruppe mit einer geringeren Zunahme der mRNA-Expression als Reaktion auf den mDST. Das Therapieansprechen in der Depressionsgruppe wiederum war mit einer niedrigeren Methylierung auf CpG7 sowie einer höheren mRNA-Expression zu Therapiebeginn assoziiert. Im Behandlungsverlauf führte eine Abnahme der mRNA-Expression bei den Respondern zu einer Annäherung beider Gruppen.
Diese Arbeit konnte keine Hinweise für eine Rolle von FKBP5 in der Pathogenese der Herzinsuffizienz finden. Allerdings zeigten die Befunde zur Regulation des Gens bei Glukokortikoidstimulation eine hohe Konstanz zu vorherigen Ergebnissen. In diesen Kontext reihen sich auch die Ergebnisse für das Therapieansprechen ein, die aufgrund einer Herabregulation der HPA-Achse im Therapieverlauf die Idee einer ursächlichen HPA-Dysregulation in der Gruppe der Responder bekräftigen. Für sich allein genommen lassen sich mRNA-Expression und Methylierung aufgrund mangelnder Sensitivität und Spezifität nicht als Biomarker für das Therapieansprechen einsetzen. Die bisherigen Befunde bestärken aber eine mögliche Rolle in einer Batterie unterschiedlicher Biomarker auf verschiedenen Ebenen, wie Klinik, Psychometrie und Physiologie.
Obsessive-compulsive disorder (OCD) is a common neuropsychiatric disease affecting about 2% of the general population. It is characterized by persistent intrusive thoughts and repetitive ritualized behaviors. While gene variations, malfunction of cortico-striato-thalamo-cortical (CSTC) circuits, and dysregulated synaptic transmission have been implicated in the pathogenesis of OCD, the underlying mechanisms remain largely unknown. Here we show that OCD-like behavior in mice is caused by deficiency of SPRED2, a protein expressed in various brain regions and a potent inhibitor of Ras/ERK-MAPK signaling. Excessive self-grooming, reflecting OCD-like behavior in rodents, resulted in facial skin lesions in SPRED2 knockout (KO) mice. This was alleviated by treatment with the selective serotonin reuptake inhibitor fluoxetine. In addition to the previously suggested involvement of cortico-striatal circuits, electrophysiological measurements revealed altered transmission at thalamo-amygdala synapses and morphological differences in lateral amygdala neurons of SPRED2 KO mice. Changes in synaptic function were accompanied by dysregulated expression of various pre- and postsynaptic proteins in the amygdala. This was a result of altered gene transcription and triggered upstream by upregulated tropomyosin receptor kinase B (TrkB)/ERK-MAPK signaling in the amygdala of SPRED2 KO mice. Pathway overactivation was mediated by increased activity of TrkB, Ras, and ERK as a specific result of SPRED2 deficiency and not elicited by elevated brain-derived neurotrophic factor levels. Using the MEK inhibitor selumetinib, we suppressed TrkB/ERK-MAPK pathway activity in vivo and reduced OCD-like grooming in SPRED2 KO mice. Altogether, this study identifies SPRED2 as a promising new regulator, TrkB/ERK-MAPK signaling as a novel mediating mechanism, and thalamo-amygdala synapses as critical circuitry involved in the pathogenesis of OCD.
Panic disorder (PD) is characterized by recurrent and unexpected panic attacks, subsequent anticipatory anxiety, and phobic avoidance. Recent epidemiological and genetic studies have revealed that genetic factors contribute to the pathogenesis of PD. We performed whole-exome sequencing on one Japanese family, including multiple patients with panic disorder, which identified seven rare protein-altering variants. We then screened these genes in a Japanese PD case–control group (384 sporadic PD patients and 571 controls), resulting in the detection of three novel single nucleotide variants as potential candidates for PD (chr15: 42631993, T>C in GANC; chr15: 42342861, G>T in PLA2G4E; chr20: 3641457, G>C in GFRA4). Statistical analyses of these three genes showed that PLA2G4E yielded the lowest p value in gene-based rare variant association tests by Efficient and Parallelizable Association Container Toolbox algorithms; however, the p value did not reach the significance threshold in the Japanese. Likewise, in a German case–control study (96 sporadic PD patients and 96 controls), PLA2G4E showed the lowest p value but again did not reach the significance threshold. In conclusion, we failed to find any significant variants or genes responsible for the development of PD. Nonetheless, our results still leave open the possibility that rare protein-altering variants in PLA2G4E contribute to the risk of PD, considering the function of this gene.
Selective serotonin reuptake inhibitors are among the most prescribed antidepressants. Fluoxetine is the lead molecule which exerts its therapeutic effects, at least in part, by promoting neuroplasticity through increased brain-derived neurotrophic factor (BDNF)/tropomyosin-related receptor kinase B (TrkB) signalling. It is unclear however, to which extent the neuroplastic effects of fluoxetine are solely mediated by the inhibition of the serotonin transporter (5-HTT). To answer this question, the effects of fluoxetine on neuroplasticity were analysed in both wild type (WT) and 5-Htt knock-out (KO) mice. Using Western blotting and RT-qPCR approaches, we showed that fluoxetine 10 µM activated BDNF/TrkB signalling pathways in both CD1 and C57BL/6J mouse primary cortical neurons. Interestingly, effects on BDNF signalling were observed in primary cortical neurons from both 5-Htt WT and KO mice. In addition, a 3-week in vivo fluoxetine treatment (15 mg/kg/d; i.p.) increased the expression of plasticity genes in brains of both 5-Htt WT and KO mice, and tended to equally enhance hippocampal cell proliferation in both genotypes, without reaching significance. Our results further suggest that fluoxetine-induced neuroplasticity does not solely depend on 5-HTT blockade, but might rely, at least in part, on 5-HTT-independent direct activation of TrkB.
In dieser Arbeit wurde der Einfluss sozialer Stresserfahrung sowie des 5-Htt-Genotyps auf die neuronale Morphologie bestimmter Hirnregionen anhand eines Mausmodells untersucht. Es wurde in mit Golgi-Cox gefärbten Gehirnen der 5-HTT-KO-Linie in der lateralen Amygdala (LA) die Apikal- und Basaldendriten pyramidenzellähnlicher Neurone und die Apikaldendriten der Pyramidenzellen der Cornu ammonis (CA)3-Region des Hippocampus mithilfe des Neurolucidasystems rekonstruiert und die so gewonnenen Daten anschließend statistisch ausgewertet.
Die erzielten Ergebnisse belegen, dass vor allem die Erfahrung von sozialem Verteidigungsstress aber auch der 5-Htt-Genotyp (WT, HET, KO) im Mausmodell signifikanten Einfluss auf die Morphologie der Neurone der LA und der CA3-Region besitzen. Um die in dieser Arbeit mit allen drei 5-Htt-Genotypen erzielten Ergebnisse der LA-Neurone besser mit den Ergebnissen von Nietzer und Bonn (nur WT, KO) vergleichen zu können (Nietzer et al., 2011), wurden die von mir erhobenen Daten nicht nur in einem 3er-Vergleich, sondern auch einem 2er-Vergleich (WT vs. KO) statistisch analysiert. Untersuchungen der LA-Neurone aller drei 5-Htt-Genotypen zeigen, dass sozialer Stress zu einer Zunahme der Komplexität der Dendritenbäume durch längere und auch stärker verzweigte Dendriten vor allem in der Gruppe der WT-Mäuse führt. HET- und KO-Mäuse zeigten keinen entsprechenden Stress-Effekt. Darüber hinaus zeigten sich deutliche Genotypeffekte. Unabhängig vom Stresserleben besitzen HET-Mäuse längere Dendriten als WT-Mäuse sowie eine höhere Spinedichte als WT- und KO-Mäuse. Die Hypothese, die in der Arbeit von Nietzer et al. aufgestellt wurde, dass eine vollständige 5-HTT-Defizienz zu mehr Spines führt, ließ sich hier weder durch den 3er- noch durch den 2er-Vergleich replizieren. Die Pyramidenzellen der CA3-Region, die in dieser Studie zum ersten Mal analysiert wurden, zeigen in Bezug auf die durch den Stress ausgelösten Veränderungen ein im Vergleich zu den LA-Neuronen entgegengesetzten Effekt. Der soziale Stress führt hier zu einer Dendritenatrophie in der WT-Gruppe mit kürzeren und weniger komplexen Dendriten. Außerdem führte er zu einer geringeren Spinedichte bei den HET-Mäusen. Es zeigten sich klare Genotypeffekte, unabhängig von der Stresserfahrung, mit einer reduzierten Spinedichte der KO-Mäuse gegenüber den WT-Mäusen und einer nur in den Kontrollen detektierten, reduzierten Spinedichte der KO-Mäuse im Vergleich zu den WT- und HET-Mäusen. Sowohl in der LA als auch in der CA3-Region lassen sich Kompensationsmechanismen des 5-HTT-Defizits der HET-Tiere vermuten, über die die KO-Tiere nicht verfügen.
Die in LA und CA3 gezeigten gegensätzlichen Auswirkungen des sozialen Stresses weisen auf die unterschiedlichen Funktionen dieser beiden Regionen im Furchtkreislauf und/oder bei der Verarbeitung von Stress hin. Darüber hinaus deutet diese Arbeit darauf hin, dass Arbeiten mit ähnlichen Untersuchungsmethoden und sogar gleichem Untersuchungsmaterial unterschiedliche Ergebnisse liefern können.
Increased sympathetic noradrenergic signaling is crucially involved in fear and anxiety as defensive states. MicroRNAs regulate dynamic gene expression during synaptic plasticity and genetic variation of microRNAs modulating noradrenaline transporter gene (SLC6A2) expression may thus lead to altered central and peripheral processing of fear and anxiety. In silico prediction of microRNA regulation of SLC6A2 was confirmed by luciferase reporter assays and identified hsa-miR-579-3p as a regulating microRNA. The minor (T)-allele of rs2910931 (MAFcases = 0.431, MAFcontrols = 0.368) upstream of MIR579 was associated with panic disorder in patients (pallelic = 0.004, ncases = 506, ncontrols = 506) and with higher trait anxiety in healthy individuals (pASI = 0.029, pACQ = 0.047, n = 3112). Compared to the major (A)-allele, increased promoter activity was observed in luciferase reporter assays in vitro suggesting more effective MIR579 expression and SLC6A2 repression in vivo (p = 0.041). Healthy individuals carrying at least one (T)-allele showed a brain activation pattern suggesting increased defensive responding and sympathetic noradrenergic activation in midbrain and limbic areas during the extinction of conditioned fear. Panic disorder patients carrying two (T)-alleles showed elevated heart rates in an anxiety-provoking behavioral avoidance test (F(2, 270) = 5.47, p = 0.005). Fine-tuning of noradrenaline homeostasis by a MIR579 genetic variation modulated central and peripheral sympathetic noradrenergic activation during fear processing and anxiety. This study opens new perspectives on the role of microRNAs in the etiopathogenesis of anxiety disorders, particularly their cardiovascular symptoms and comorbidities.
Preclinical studies point to a pivotal role of the orexin 1 (OX1) receptor in arousal and fear learning and therefore suggest the HCRTR1 gene as a prime candidate in panic disorder (PD) with/without agoraphobia (AG), PD/AG treatment response, and PD/AG-related intermediate phenotypes. Here, a multilevel approach was applied to test the non-synonymous HCRTR1 C/T Ile408Val gene variant (rs2271933) for association with PD/AG in two independent case-control samples (total n = 613 cases, 1839 healthy subjects), as an outcome predictor of a six-weeks exposure-based cognitive behavioral therapy (CBT) in PD/AG patients (n = 189), as well as with respect to agoraphobic cognitions (ACQ) (n = 483 patients, n = 2382 healthy subjects), fMRI alerting network activation in healthy subjects (n = 94), and a behavioral avoidance task in PD/AG pre- and post-CBT (n = 271). The HCRTR1 rs2271933 T allele was associated with PD/AG in both samples independently, and in their meta-analysis (p = 4.2 × 10−7), particularly in the female subsample (p = 9.8 × 10−9). T allele carriers displayed a significantly poorer CBT outcome (e.g., Hamilton anxiety rating scale: p = 7.5 × 10−4). The T allele count was linked to higher ACQ sores in PD/AG and healthy subjects, decreased inferior frontal gyrus and increased locus coeruleus activation in the alerting network. Finally, the T allele count was associated with increased pre-CBT exposure avoidance and autonomic arousal as well as decreased post-CBT improvement. In sum, the present results provide converging evidence for an involvement of HCRTR1 gene variation in the etiology of PD/AG and PD/AG-related traits as well as treatment response to CBT, supporting future therapeutic approaches targeting the orexin-related arousal system.
That the human brain contains magnetite is well established; however, its spatial distribution in the brain has remained unknown. We present room temperature, remanent magnetization measurements on 822 specimens from seven dissected whole human brains in order to systematically map concentrations of magnetic remanence carriers. Median saturation remanent magnetizations from the cerebellum were approximately twice as high as those from the cerebral cortex in all seven cases (statistically significantly distinct, p = 0.016). Brain stems were over two times higher in magnetization on average than the cerebral cortex. The ventral (lowermost) horizontal layer of the cerebral cortex was consistently more magnetic than the average cerebral cortex in each of the seven studied cases. Although exceptions existed, the reproducible magnetization patterns lead us to conclude that magnetite is preferentially partitioned in the human brain, specifically in the cerebellum and brain stem.
Amantadine: reappraisal of the timeless diamond—target updates and novel therapeutic potentials
(2021)
The aim of the current review was to provide a new, in-depth insight into possible pharmacological targets of amantadine to pave the way to extending its therapeutic use to further indications beyond Parkinson’s disease symptoms and viral infections. Considering amantadine’s affinities in vitro and the expected concentration at targets at therapeutic doses in humans, the following primary targets seem to be most plausible: aromatic amino acids decarboxylase, glial-cell derived neurotrophic factor, sigma-1 receptors, phosphodiesterases, and nicotinic receptors. Further three targets could play a role to a lesser extent: NMDA receptors, 5-HT3 receptors, and potassium channels. Based on published clinical studies, traumatic brain injury, fatigue [e.g., in multiple sclerosis (MS)], and chorea in Huntington’s disease should be regarded potential, encouraging indications. Preclinical investigations suggest amantadine’s therapeutic potential in several further indications such as: depression, recovery after spinal cord injury, neuroprotection in MS, and cutaneous pain. Query in the database http://www.clinicaltrials.gov reveals research interest in several further indications: cancer, autism, cocaine abuse, MS, diabetes, attention deficit-hyperactivity disorder, obesity, and schizophrenia.
C9ORF72 mutations are the most common cause of familial frontotemporal lobar degeneration (FTLD) and amyotrophic lateral sclerosis (ALS). MRI studies have investigated structural changes in C9ORF72-associated FTLD (C9FTLD) and provided first insights about a prominent involvement of the thalamus and the cerebellum. Our multicenter, 18F-fluorodeoxyglucose positron-emission tomography study of 22 mutation carriers with FTLD, 22 matched non-carriers with FTLD, and 23 cognitively healthy controls provided valuable insights into functional changes in C9FTLD: compared to non-carriers, mutation carriers showed a significant reduction of glucose metabolism in both thalami, underscoring the key role of the thalamus in C9FTLD. Thalamic metabolism did not correlate with disease severity, duration of disease, or the presence of psychotic symptoms. Against our expectations we could not demonstrate a cerebellar hypometabolism in carriers or non-carriers. Future imaging and neuropathological studies in large patient cohorts are required to further elucidate the central role of the thalamus in C9FTLD.
Psychiatric disorders are thought to have a complex genetic pathology consisting of interplay of common and rare variation. Traditionally, pedigrees are used to shed light on the latter only, while here we discuss the application of polygenic risk scores to also highlight patterns of common genetic risk. We analyze polygenic risk scores for psychiatric disorders in a large pedigree (n ~ 260) in which 30% of family members suffer from major depressive disorder or bipolar disorder. Studying patterns of assortative mating and anticipation, it appears increased polygenic risk is contributed by affected individuals who married into the family, resulting in an increasing genetic risk over generations. This may explain the observation of anticipation in mood disorders, whereby onset is earlier and the severity increases over the generations of a family. Joint analyses of rare and common variation may be a powerful way to understand the familial genetics of psychiatric disorders.
Universal prevention for non-suicidal self-injury in adolescents is scarce - A systematic review
(2023)
Non-suicidal self-injury (NSSI) during adolescence is a high-risk marker for the development and persistence of mental health problems and has been recognized as a significant public health problem. Whereas targeted prevention has indeed shown to be effective in reducing NSSI and improve mental health problems, access to such programs is limited. By face validity, universal prevention of NSSI seems an ideal starting point for a stepped-care model to circumvent a lack of resources in the medical care system. However, it is yet unclear how effective such approaches are. Here, we provide a summary of existing work on universal prevention of NSSI in adolescents younger than 21 years based on a systematic literature search. We found that only seven studies are available. None of the programs evaluated was found to be effective in reducing the incidence or frequency of NSSI. After providing a comprehensive summary of the existing work, we evaluate the fact that existing work primarily focusses on selected/targeted prevention and on psychoeducational methods. We derive implications for future directions in the field of universal prevention of NSSI.
Background
Cognitive impairment is a major comorbidity in patients with chronic heart failure (HF) with a wide range of phenotypes. In this study, we aimed to identify and compare different clusters of cognitive deficits.
Methods
The prospective cohort study “Cognition.Matters-HF” recruited 147 chronic HF patients (aged 64.5 ± 10.8 years; 16.2% female) of any etiology. All patients underwent extensive neuropsychological testing. We performed a hierarchical cluster analysis of the cognitive domains, such as intensity of attention, visual/verbal memory, and executive function. Generated clusters were compared exploratively with respect to the results of cardiological, neurological, and neuroradiological examinations without correction for multiple testing.
Results
Dendrogram and the scree plot suggested three distinct cognitive profiles: In the first cluster, 42 patients (28.6%) performed without any deficits in all domains. Exclusively, the intensity of attention deficits was seen in the second cluster, including 55 patients (37.4%). A third cluster with 50 patients (34.0%) was characterized by deficits in all cognitive domains. Age (p = 0.163) and typical clinical markers of chronic HF, such as ejection fraction (p = 0.222), 6-min walking test distance (p = 0.138), NT-proBNP (p = 0.364), and New York Heart Association class (p = 0.868) did not differ between clusters. However, we observed that women (p = 0.012) and patients with previous cardiac valve surgery (p = 0.005) prevailed in the “global deficits” cluster and the “no deficits” group had a lower prevalence of underlying arterial hypertension (p = 0.029). Total brain volume (p = 0.017) was smaller in the global deficit cluster, and serum levels of glial fibrillary acidic protein were increased (p = 0.048).
Conclusion
Apart from cognitively healthy and globally impaired HF patients, we identified a group with deficits only in the intensity of attention. Women and patients with previous cardiac valve surgery are at risk for global cognitive impairment when suffering HF and could benefit from special multimodal treatment addressing the psychosocial condition.
Alien limb phenomenon is a rare syndrome associated with a feeling of non-belonging and disowning toward one's limb. In contrast, anarchic limb phenomenon leads to involuntary but goal-directed movements. Alien/anarchic limb phenomena are frequent in corticobasal syndrome (CBS), an atypical parkinsonian syndrome characterized by rigidity, akinesia, dystonia, cortical sensory deficit, and apraxia. The structure function relationship of alien/anarchic limb was investigated in multi centric structural magnetic resonance imaging (MRI) data. Whole-group and single subject comparisons were made in 25 CBS and eight CBS-alien/anarchic limb patients versus controls. Support vector machine was used to see if CBS with and without alien/anarchic limb could be distinguished by structural MRI patterns. Whole-group comparison of CBS versus controls revealed asymmetric frontotemporal atrophy. CBS with alien/anarchic limb syndrome versus controls showed frontoparietal atrophy including the supplementary motor area contralateral to the side of the affected limb. Exploratory analysis identified frontotemporal regions encompassing the pre-/and postcentral gyrus as compromised in CBS with alien limb syndrome. Classification of CBS patients yielded accuracies of 79%. CBS-alien/anarchic limb syndrome was differentiated from CBS patients with an accuracy of 81%. Predictive differences were found in the cingulate gyrus spreading to frontomedian cortex, postcentral gyrus, and temporoparietoocipital regions. We present the first MRI-based group analysis on CBS-alien/anarchic limb. Results pave the way for individual clinical syndrome prediction and allow understanding the underlying neurocognitive architecture. (C) 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Background
Performance anxiety is the most frequently reported anxiety disorder among professional musicians. Typical symptoms are - on a physical level - the consequences of an increase in sympathetic tone with cardiac stress, such as acceleration of heartbeat, increase in blood pressure, increased respiratory rate and tremor up to nausea or flush reactions. These symptoms can cause emotional distress, a reduced musical and artistical performance up to an impaired functioning. While anxiety disorders are preferably treated using cognitive-behavioral therapy with exposure, this approach is rather difficult for treating music performance anxiety since the presence of a public or professional jury is required and not easily available. The use of virtual reality (VR) could therefore display an alternative. So far, no therapy studies on music performance anxiety applying virtual reality exposure therapy have investigated the therapy outcome including cardiovascular changes as outcome parameters.
Methods
This mono-center, prospective, randomized and controlled clinical trial has a pre-post design with a follow-up period of 6 months. 46 professional and semi-professional musicians will be recruited and allocated randomly to an VR exposure group or a control group receiving progressive muscle relaxation training. Both groups will be treated over 4 single sessions. Music performance anxiety will be diagnosed based on a clinical interview using ICD-10 and DSM-5 criteria for specific phobia or social anxiety. A behavioral assessment test is conducted three times (pre, post, follow-up) in VR through an audition in a concert hall. Primary outcomes are the changes in music performance anxiety measured by the German Bühnenangstfragebogen and the cardiovascular reactivity reflected by heart rate variability (HRV). Secondary outcomes are changes in blood pressure, stress parameters such as cortisol in the blood and saliva, neuropeptides, and DNA-methylation.
Discussion
The trial investigates the effect of VR exposure in musicians with performance anxiety compared to a relaxation technique on anxiety symptoms and corresponding cardiovascular parameters. We expect a reduction of anxiety but also a consecutive improvement of HRV with cardiovascular protective effects.
Trial registration
This study was registered on clinicaltrials.gov. (ClinicalTrials.gov Number: NCT05735860)
Single nucleotide polymorphisms (SNPs) in the ADGRL3 gene have been significantly associated with the development of ADHD, the aetiology of which remains poorly understood. The rs1397547 SNP has additionally been associated with significantly altered ADGRL3 transcription. We therefore generated iPSCs from two wild type ADHD patients, and two ADHD patients heterozygous for the risk SNP. With this resource we aim to facilitate further investigation into the complex and heterogenous pathology of ADHD. Furthermore, we demonstrate the feasibility of using magnetic activated cell sorting to allow the unbiased selection of fully reprogrammed iPSCs.
Anxious depression represents a subtype of major depressive disorder and is associated with increased suicidality, severity, chronicity and lower treatment response. Only a few studies have investigated the differences between anxious depressed (aMDD) and non-anxious depressed (naMDD) patients regarding treatment dosage, serum-concentration and drug-specific treatment response. In our naturalistic and prospective study, we investigated whether the effectiveness of therapy including antidepressants (SSRI, SNRI, NaSSA, tricyclics and combinations) in aMDD patients differs significantly from that in naMDD patients. In a sample of 346 patients, we calculated the anxiety somatization factor (ASF) and defined treatment response as a reduction (≥50%) in the Hamilton Depression Rating Scale (HDRS)-21 score after 7 weeks of pharmacological treatment. We did not observe an association between therapy response and the baseline ASF-scores, or differences in therapy outcomes between aMDD and naMDD patients. However, non-responders had higher ASF-scores, and at week 7 aMDD patients displayed a worse therapy outcome than naMDD patients. In subgroup analyses for different antidepressant drugs, venlafaxine-treated aMDD patients showed a significantly worse outcome at week 7. Future prospective, randomized-controlled studies should address the question of a worse therapy outcome in aMDD patients for different psychopharmaceuticals individually.
Hintergrund: Depressionen zählen zu den häufigsten psychischen Erkrankungen. Depressive Symptome umfassen beeinträchtigte kognitive Funktionen, vegetative Beschwerden und ein verändertes emotionales Erleben. Die defizitäre Wahrnehmung interner körperlicher Signale wird sowohl mit der Pathogenese der Depression als auch mit Angststörungen in Verbindung gebracht. Interozeptive Genauigkeit (IAc) beschreibt dabei die Fähigkeit, körperliche Empfindungen wie den eigenen Herzschlag akkurat wahrzunehmen und wird mit einer Herzwahrnehmungsaufgabe erfasst. In bildgebenden Verfahren wie der funktionellen Magnetresonanztomografie (fMRT) war eine niedrigere IAc mit einer verringerten Inselaktivität assoziiert. Während der Ruhezustandsmessung des Gehirns (resting-state fMRT) kann in Abwesenheit einer Aufgabe die intrinsische Aktivität des Gehirns gemessen werden. Dies ermöglicht die Identifizierung von kortikalen Netzwerken. Depressive Patienten weisen eine veränderte funktionelle Konnektivität innerhalb und zwischen einzelnen Netzwerken wie dem Salience Network (SN), welchem die Insel zugerechnet wird, und dem Default Mode Network (DMN) auf. Bisherige Studien, in denen überwiegend jüngere depressive Patienten untersucht wurden, kamen jedoch hinsichtlich der IAc und den kortikalen Netzwerken zu inkonsistenten Ergebnissen. Insbesondere ist unklar, inwieweit sich die IAc nach einem Therapieansprechen verändert, von der Herzratenvariabilität (HRV) moduliert wird und welche Auswirkungen dies auf die funktionelle Konnektivität kortikaler Netzwerke hat.
Ziele: Eine veränderte IAc und HRV wie auch funktionelle Konnektivitätsunterschiede im DMN und SN könnten Biomarker der Depression darstellen. Im Rahmen einer Längsschnittuntersuchung wurde getestet, ob ältere depressive Patienten über eine verringerte IAc, eine geringere HRV und über eine veränderte funktionelle Konnektivität im SN sowie DMN verfügen. Darüber hinaus sollte erforscht werden, in welchem Ausmaß sich Patienten, die auf die Behandlung ansprachen (Responder), von sogenannten Non-Respondern in Bezug auf die IAc, die HRV, das SN und das DMN unterschieden.
Methoden: In Studie 1 (Baseline) wurden 30 größtenteils medizierte, schwer depressive Patienten (> 50 Jahre) und 30 gesunde Kontrollprobanden untersucht. Die IAc wurde in einer Herzwahrnehmungsaufgabe ermittelt und die HRV bestimmt. Zusätzlich wurde eine resting-state fMRT durchgeführt. Eine funktionelle Konnektivitätsanalyse für Saatregionen im SN und DMN wurde mit einem saatbasierten Ansatz (seed-to-voxel) durchgeführt. Für eine Subgruppenanalyse wurde die Patientengruppe in ängstlich-depressive und nicht-ängstlich depressive Patienten unterteilt.
In Studie 2 (sechs Monate Follow-up) wurde die Studienkohorte nochmals untersucht. Es nahmen 21 Personen der Patientengruppe und 28 Probanden der Kontrollgruppe teil. Wiederum wurden die IAc und die HRV bestimmt. Außerdem fand eine resting-state fMRT-Messung statt. Die Patientengruppe wurde unterteilt in depressive Responder und Non-Responder.
Ergebnisse: In Studie 1 zeigten depressive Patienten eine funktionelle Hypokonnektivität zwischen einzelnen Saatregionen der Insel (SN) und Teilen des superioren frontalen Gyrus, des supplementärmotorischen Cortex, des lateralen okzipitalen Cortex sowie des Okzipitalpols. Zudem wiesen depressive Patienten zwischen der Saatregion im anterioren Teil des DMN und der Insel sowie dem Operculum eine erhöhte funktionelle Konnektivität auf. Die Gruppen unterschieden sich nicht in der IAc und der HRV. Ängstlich-depressive Patienten zeigten eine höhere funktionelle Konnektivität innerhalb der Insel als nicht-ängstlich depressive Patienten, jedoch zeigten sich keine Unterschiede in der IAc und der HRV.
In Studie 2 wiesen depressive Non-Responder im Vergleich zu Respondern eine Hyperkonnektivität zwischen dem posterioren DMN und dem Frontalpol sowie zwischen dem posterioren DMN und temporalen Arealen im SN auf. Keine funktionellen Konnektivitätsunterschiede zeigten sich für die Saatregionen im SN. Depressive Responder, Non-Responder und die Kontrollprobanden unterschieden sich in ihrer IAc und HRV nicht.
Schlussfolgerungen: Die Ergebnisse der Studien unterstreichen, dass bei depressiven Patienten, Respondern und Non-Respondern Unterschiede in der intrinsischen Gehirnaktivität funktioneller Netzwerke bestehen, jedoch nicht in der akkuraten Wahrnehmung des eigenen Herzschlages und der HRV. Therapeutische Interventionen, die auf eine Verbesserung der IAc abzielen, könnten insbesondere für Non-Responder dennoch eine zusätzliche Behandlungsmöglichkeit darstellen. Für eine personalisierte Medizin könnte die weitere Erforschung von kortikalen Netzwerken einen wesentlichen Beitrag leisten, um ein individuelles Therapieansprechen zu prädizieren.