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Spatial behavior of the rat in non-stationary environments:role of the posterior parietal cortex
Svoboda, Jan ; Stuchlík, Aleš (advisor) ; Hort, Jakub (referee) ; Rokyta, Richard (referee)
Better understanding of cognitive functions and their underlying neural substrate requires appropriate behavioral testing methods. Studying spatial cognition of rat has taken advantage from plethora of tests examining spatial capabilities in stationary environments. However, an animal obviously daily faces situations in which it must response to ever changing elements in its environment. Thus this thesis was aimed to contribute to understanding how an animal represent these non-stationary environments and to elucidating of the role of some brain structures such as posterior parietal cortex or hippocampus.
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Neuroregeneration after spinal cord injury and in amyotrophic lateral sclerosis -possibilities for stem cell therapy
Forostyak, Serhiy ; Syková, Eva (advisor) ; Rokyta, Richard (referee) ; Mazanec, Radim (referee)
Adipose-derived MSC could be used as an alternative for bone marrow MSC in the treatment of acute SCI. We used the intraspinal grafting of rat adipose-derived naïve and predifferentiated MSC to improve motor function after a balloon-induced compression lesion of the rat spinal cord. Grafted cells survived for seven weeks after transplantation, improved motor activity and integrated into the host tissue. They expressed the oligodenrocyte precursor marker NG2 and, occasionally, the astrocytic marker GFAP, but did not transdifferentiate into a neuronal phenotype. Bone marrow MSC may change the disease course and extend lifespan in a rat model of ALS. Combined intraspinal and intravenous transplantation of rat BMSC was performed in symptomatic rats overexpressing the SOD1 G93A gene. Cell-treated animals lived longer compared with sham-treated rats and displayed significantly improved motor activity and grip strength. Rat BMSC survived until the end stage of the disease and were migrating along the white matter of the spinal cord. Grafted cells increased the number of host cells displaying positive staining for neurofilaments and significantly increased the number and also the size of the remaining spinal motoneurons 10-11 weeks after delivery, compared with vehicle-injection. The defragmentation of DNA, a sign...
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Radial approach to coronary catheterizations and interventions
Bernat, Ivo ; Rokyta, Richard (advisor) ; Vojáček, Jan (referee) ; Ošťádal, Petr (referee)
Radial approach in coronary catheterizations and interventions has been only an alternative of the femoral approach. But due to some important advantages radial approach has a chance to become the first choice in majority of catheterized patients. The most important advantage is the reduction of vascular access site bleeding complications. Additonal benefits are patient satisfaction, cost reduction, shorter hospital stay and possibility of the same-day discharge catheterizations and interventions. The aim of our work was to try to answer three open questions: 1. is it possible to catheterize majority of our patients from the left radial artery when 90% of them are right-handed ? 2. what is the optimal care for the radial artery after the procedure in prevention and treatment of radial artery occlusion? 3. is it effective to implement radial approach in primary PCI as a first approach for STEMI patients? The first part relates the left radial approach. After construction of our special variable support for the left arm and forearm we succesfully used this approach in our studies in almost 90% of patients. The second part of this work contains our randomized trial comparing two different doses of unfractionated heparin in prevention of radial artery occlusion after diagnostic cardiac catheterizations....
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The therapeutical effect of rTMS on symptomatology in schizophrenia
Baláková, Lucie ; Horáček, Jiří (advisor) ; Rokyta, Richard (referee) ; Anders, Martin (referee)
The RTMS is a new noninvasive method has the potential to both therapeutic and experimental level. The research presented in this work was dedicated to the application of repetitive transcranial magnetic stimulation (rTMS) in psychiatry. We focused also on a deeper understanding of the mechanisms of action using methods of functional imaging methods and sensing electrical activity of the brain. The experimental part of the research include the testing of cognitive function and their potential effects by stimulating the cerebral cortex district, which is regarded as the seat of that particular modality. We discuss neurobiological factors that may explain the ineffectiveness of therapy and other options are designed to test the use of rTMS in this indication. This is the Reversible stimulation (right) or bilateral stimulation, rTMS targeting the coil at the bottom of the parietal cortex, extending the total period of stimulation and the use of individual navigation based on EEG or functional imaging.
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Genetic Aspects of Sporadic Ovarian Cancer
Jančárková, Natalia ; Freitag, Pavel (advisor) ; Rokyta, Richard (referee) ; Kohoutová, Milada (referee)
58 9. SUMMARY Molecular biological parameters, including genetic alterations, present new and perspective direction in diagnostics, prediction of prognosis, monitoring and possible therapeutic approaches in oncological disease. The results presented have to do with the project, which is concentrated upon chromosomal rearrangements in ovarian and cervical cancer and their correlations with available parameters of both molecular biological and clinical characteristics. Sixty patients with ovarian cancer and twenty patients manifesting cervical cancer were included into the study. The histological type and grade, MIB-1 and p53 (using immunohistochemical method) were estimated by histopathologist. Both conventional karyotyping and molecular-cytogenetic methods (fluorescent in situ hybridization and comparative genomic hybridization) were applied to reveal chromosomal aberrations. The results were subjected to statistical evaluation, using analysis of variances and χ2 test. There were correlated parameters of quantitative and qualitative character - age, stage, histological type, grade, CA 125 before and after treatment, MIB-1, p53, surgical residuum, lymphadenectomy, response rate, chromosomal rearrangements. Analyses accomplished in ovarian cancer group revealed typical amplifications on chromosomes 1q, 3q and...
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Elecrophysiological correlates in childhood autism
Kulísek, Robert ; Komárek, Vladimír (advisor) ; Rokyta, Richard (referee) ; Krajča, Vladimír (referee) ; Drtílková, Ivana (referee)
Dětský autismus jako hlavní představitel skupiny pervazivních vývojových poruch (dále PVP) představuje i po více než 60 letech probíhajícího výzkumu stále velkou výzvu pro odborníky jak z oblasti základního výzkumu tak i pro klinické pracovníky. Závažnost této skupiny poruch byla dlouhou dobu podceňována, autismus byl zpočátku považován za velmi vzácné onemocnění . Po sjednocení a ustálení diagnostických kritérií a především díky zefektivnění diagnostických metod se však ukazuje, že se jedná o mnohem častější, navíc klinicky velmi závažné postižení. Včasná terapeutická intervence je podmíněna rozpoznáním prvních příznaků , přesnou diagnózou včetně stanovení prognózy a pečlivým dlouhodobým sledováním vývoje. Péče o pacienta s autismem je komplexní a vyžaduje pozornost celého týmu specialistů z různých medicínských oborLl. Dosavadní léčebné možnosti jsou však nadále neuspokojivé. Významnou a dosud kontroverzní otázkou je vzájemný vztah mezi pervazivními vývojovými porucham i, epilepsií a EEG epileptiformními abnormitami , které jsou s autismem ve vysoké míře asociovány. Je zvažován jejich patogenetický podíl na nepříznivém regresivním vývoji u některých pacientů , případný negativní vliv na intelektové funkce a behaviorální profil pacientů. Zdrojem inspirujících poznatkůjsou také některé epileptické syndromy...
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název v anglickém jazyce není uveden
Pospíšilová, Eva ; Paleček, Jiří (advisor) ; Kršiak, Miloslav (referee) ; Rokyta, Richard (referee)
Tissue injury leads to increased sensitivity to noxious and innocuous stimuli due to mechanisms of peripheral sensitisation of primary nociceptors and central sensitization of neurons in the spinal dorsal horns. The subpopulation of capsaicin - sensitive sensory neurons plays an important role in this process. The capsaicin - sensitive neurons express capsaicin TRPV1 receptors (transient receptor potential 1) on their peripheral and central terminals, local high concentration capsaicin treatment can induce regional destruction of these endings. It is well estabilished that TRPV1 receptors play the key role in neural transmission of nociceptive information and its modulation. The aims of this study were to investigate the role of capsaicin - sensitive primary afferent fibers and the involvement of peripheral and central TRPV1 receptors in the development of hypersensitivity after surgical tissue trauma, to test the effect of high concentration capsaicin and the specific TRPV1 antagonist treatment on postoperative pain and to enlighten the function of central TRPV1 receptors in the neural mechanisms of nociception. Using behavioral testing methods, the responses to mechanical (Von Frey filaments) and thermal stimuli (radiant heat source) were tested on the rat plantar incision model of surgical pain...
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