@article{WunschCaspellKuertenetal.2015,
  author    = {Wunsch, Marie and Caspell, Richard and Kuerten, Stefanie and Lehmann, Paul V. and Sundararaman, Srividya},
  title     = {Serial measurements of apoptotic cell numbers provide better acceptance criterion for PBMC quality than a single measurement prior to the T cell assay},
  series = {Cells},
  volume    = {4},
  journal   = {Cells},
  number    = {1},
  doi       = {10.3390/cells4010040},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-150213},
  pages     = {40-55},
  year      = {2015},
  abstract  = {As soon as Peripheral Blood Mononuclear Cells (PBMC) are isolated from whole blood, some cells begin dying. The rate of apoptotic cell death is increased when PBMC are shipped, cryopreserved, or stored under suboptimal conditions. Apoptotic cells secrete cytokines that suppress inflammation while promoting phagocytosis. Increased numbers of apoptotic cells in PBMC may modulate T cell functions in antigen-triggered T cell assays. We assessed the effect of apoptotic bystander cells on a T cell ELISPOT assay by selectively inducing B cell apoptosis using α-CD20 mAbs. The presence of large numbers of apoptotic B cells did not affect T cell functionality. In contrast, when PBMC were stored under unfavorable conditions, leading to damage and apoptosis in the T cells as well as bystander cells, T cell functionality was greatly impaired. We observed that measuring the number of apoptotic cells before plating the PBMC into an ELISPOT assay did not reflect the extent of PBMC injury, but measuring apoptotic cell frequencies at the end of the assay did. Our data suggest that measuring the numbers of apoptotic cells prior to and post T cell assays may provide more stringent PBMC quality acceptance criteria than measurements done only prior to the start of the assay.},
  language  = {en}
}
@phdthesis{Saleh2019,
  author    = {Saleh, Ahmed},
  title     = {The emerging role of stress speckle tracking in viability world},
  doi       = {10.25972/OPUS-18053},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-180536},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2019},
  abstract  = {Introduction: Speckle-tracking echocardiography has recently emerged as a quantitative ultrasound technique for accurately evaluating myocardial function by analyzing the motion of speckles identified. Speckle-tracking obtained under stress may offer an opportunity to improve the detection of dynamic regional abnormalities and myocardial viability. Objective: To evaluate stress speckle tracking as tool to detect myocardial viability in comparison to cardiac MRI in post-STEMI patients. Methods: 49 patients were prospectively enrolled in our 18-month's study. Dobutamin stress echocardiography was performed 4 days post-infarction accompanied with automated functional imaging (Speckle tracking) analysis of left ventricle during rest and then during low dose stress. All patients underwent a follow up stress echocardiography at 6 weeks with speckle tracking analysis. Cardiac MRI took place concomitantly at 4 days post-infarction and 6 weeks. We carried out an assessment of re-admission with acute coronary syndrome (ACS) after one year of enrollment. Results: Investigating strain rate obtained with stress speckle tracking after revascularization predicted the extent of myocardial scar, determined by contrast-enhanced magnetic resonance imaging. A good correlation was found between the global strain and total infarct size (R 0.75, p< 0.001). Furthermore, a clear inverse relationship was found between the segmental strain and the transmural extent of infarction in each segment. (R -0.69, p<0.01). Meanwhile it provided 81.82\% sensitivity and 82.6\% specificity to detect transmural from non-transmural infarction at a cut-off value of -10.15. Global stress strain rate showed 80\% sensitivity and 77.5\% specificity at a cut-off value of -9.1 to predict hospital re-admission with ACS. A cut-off value of -8.4 had shown a 69.23\% sensitivity and 73.5\% specificity to predict the re-admission related to other cardiac symptoms. Conclusion: Strain rate obtained from speckle tracking during stress is a novel method of detecting myocardial viability after STEMI .Moreover it carries a promising role in post-myocardial infarction risk stratification with a reasonable prediction of reversible cardiac-related hospital re-admission.},
  language  = {en}
}
@phdthesis{Saleh2021,
  author    = {Saleh, Ahmed},
  title     = {The emerging role of stress speckle tracking in viability world},
  doi       = {10.25972/OPUS-22344},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-223447},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2021},
  abstract  = {Introduction: Speckle-tracking echocardiography has recently emerged as a quantitative ultrasound technique for accurately evaluating myocardial function by analyzing the motion of speckles identified. Speckle-tracking obtained under stress may offer an opportunity to improve the detection of dynamic regional abnormalities and myocardial viability. Objective: To evaluate stress speckle tracking as tool to detect myocardial viability in comparison to cardiac MRI in post-STEMI patients. Methods: 49 patients were prospectively enrolled in our 18-month's study. Dobutamin stress echocardiography was performed 4 days post-infarction accompanied with automated functional imaging (Speckle tracking) analysis of left ventricle during rest and then during low dose stress. All patients underwent a follow up stress echocardiography at 6 weeks with speckle tracking analysis. Cardiac MRI took place concomitantly at 4 days post-infarction and 6 weeks. We carried out an assessment of re-admission with acute coronary syndrome (ACS) after one year of enrollment. Results: Investigating strain rate obtained with stress speckle tracking after revascularization predicted the extent of myocardial scar, determined by contrast-enhanced magnetic resonance imaging. A good correlation was found between the global strain and total infarct size (R 0.75, p< 0.001). Furthermore, a clear inverse relationship was found between the segmental strain and the transmural extent of infarction in each segment. (R -0.69, p<0.01). Meanwhile it provided 81.82\% sensitivity and 82.6\% specificity to detect transmural from non-transmural infarction at a cut-off value of -10.15. Global stress strain rate showed 80\% sensitivity and 77.5\% specificity at a cut-off value of -9.1 to predict hospital re-admission with ACS. A cut-off value of -8.4 had shown a 69.23\% sensitivity and 73.5\% specificity to predict the re-admission related to other cardiac symptoms. Conclusion: Strain rate obtained from speckle tracking during stress is a novel method of detecting myocardial viability after STEMI .Moreover it carries a promising role in post-myocardial infarction risk stratification with a reasonable prediction of reversible cardiac-related hospital re-admission.},
  language  = {en}
}
@phdthesis{Waltermann2021,
  author    = {Waltermann, Leopold-Maximilian Johannes},
  title     = {Charakterisierung und Standardisierung eines in-vitro Modells der oralen Mukosa f{\"u}r die pr{\"a}klinische Forschung},
  doi       = {10.25972/OPUS-22203},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-222032},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2021},
  abstract  = {Bisherige per Tissue Engineering hergestellte Testsysteme der Mundschleimhaut basieren in der Regel auf allogenen und teils dysplastischen Keratinozyten. Dies schm{\"a}lert die Aussagekraft der gewonnenen Ergebnisse hinsichtlich des Anspruchs, Nativgewebe bestm{\"o}glich nachzubilden. In der vorliegenden Arbeit sollte daher ein am Lehrstuhl f{\"u}r Tissue Engineering und Regenerative Medizin entwickeltes Protokoll zur Herstellung dreidimensionaler epidermaler Oralmukosa{\"a}quivalente auf Basis autologer Keratinozyten auf seine Eigenschaften und Einsatzm{\"o}glichkeit als in-vitro Testsystem untersucht werden. Nach erfolgreicher Isolierung und Kultivierung im Monolayer konnten insgesamt 420 Modelle zu drei verschiedenen Zeitpunkten (Passagen) aufgebaut werden. Die Untersuchung von Histologie, Viabilit{\"a}t und Barrierefunktion mittels MTT, TEER und Natriumfluoresceinpermeabilit{\"a}t konnte einen suffizienten Aufbau von verhorntem, mehrschichtigen oralen Plattenepithel nachweisen. Gleichzeitig konnte eine Abnahme der Epithelqualit{\"a}t mit steigendem Keratinozytenalter festgestellt werden. Eine sich anschließende Untersuchung von 14 Cytokeratinen sowie Apoptosemarkern per effizienzkorrigierter und normalisierter RT-qPCR konnte die {\"U}berlegenheit der dreidimensionalen autologen Oralmukosa{\"a}quivalente gegen{\"u}ber der zweidimensionalen Monolayerkultur auf Genebene zeigen.},
  subject      = {Tissue Engineering},
  language  = {de}
}