National Repository of Grey Literature 4 records found  Search took 0.01 seconds. 
Protein profiling, metabolic enzymes and transmembrane signaling in the heart of spontaneously hypertensive SHR-Tg19 rat
Manakov, Dmitry ; Novotný, Jiří (advisor) ; Kuncová, Jitka (referee) ; Kalous, Martin (referee)
Cardiovascular diseases account for the majority of deaths both worldwide and in the Czech Republic. Main factors contributing heart disease development, aside age and sex, are obesity, high blood pressure and high blood cholesterol and triglyceride levels. Spontaneously hypertensive rat (SHR) was developed and used for search of genetic determinants of these traits. This commonly used rat model develops hypertension, dyslipidemia, and insulin resistance naturally which is caused by aberrant Cd36 fatty acid translocase gene. Previous studies have shown that rescue of Cd36 performed in the transgenic SHR-Tg19 strain enhances cardiac beta-adrenergic system, slightly increases heart mass and leads to higher susceptibility to arrhythmias. The present thesis had two main aims: 1) To investigate whether and how a transgenic rescue of Cd36 in SHR affects protein composition, mitochondrial function and activity of selected metabolic enzymes of the heart. 2) To study the expression and distribution of selected components of beta-adrenergic signaling system in lipid raft isolated form membranes using the TX-100 detergent. We set to compare two commonly used proteomic approaches, 2D electrophoresis with MALDI-TOF mass spectrometry and label-free LC-MS. The results did not reveal any overlap between...
Pharmacological and metabolic influence on liver mitochondrial functions
Sobotka, Ondřej ; Červinková, Zuzana (advisor) ; Kuncová, Jitka (referee) ; Žurmanová, Jitka (referee)
Liver mitochondria play a crucial role in intermediary metabolism and main metabolic pathways. We evaluated the pharmacological effect on liver mitochondria in vitro using two novel anticancer drugs: 3-bromopyruvate and α-tocopheryl succinate. Metabolic influence on liver mitochondria was performed in vivo by high fat and high cholesterol diet. Toxicity of both drugs was evaluated in cell cultures of hepatocytes isolated from rat and mouse liver. The effect of anticancer drugs on liver mitochondrial functions in vitro was studied on suspensions of isolated liver mitochondria, tissue homogenate and permeabilized hepatocytes. Mitochondrial respiration was measured using high-resolution respirometry. 3-bromopyruvate caused morphological and functional damage of primary rat and mouse hepatocytes in cell cultures; this toxic effect was accompanied by an increase of reactive oxygen species production and mitochondrial dysfunction. 3-bromopyruvate decreased the oxygen consumption of mitochondria energized by substrates for complex I and complex II. α-Tocopheryl succinate caused a decrease of succinate-dependent respiration in all experimental models both in coupled and in uncoupled states. The most pronounced effect of α-tocopheryl succinate was apparent in isolated mitochondria and the least pronounced...
Regulace receptorů spřažených s G proteiny Studie muskarinových a β-adrenergních receptorů u M2KO myší
Beneš, Jan ; Mysliveček, Jaromír (advisor) ; Kuncová, Jitka (referee) ; Nováková, Marie (referee)
(in English): The aim of the work was to perform in-depth analysis of M2KO mice both at baseline and upon a challenge with a cold stress and to explore the role of opposing receptors (i.e. adrenoceptors) in adaptation to lacking M2-receptors in the heart. We have performed receptor binding studies, study of receptor gene expression, echocardiography, telemetric monitoring of heart rate, body temperature and activity, heart rate variability and biorhythm analysis, analysis of heart rate response to the application of drugs (carbachol, atropine, isoprenaline, propranolol), assessment of adenylyl cyclase and NO synthase activity, measurement of catecholamine blood concentration and gene expression of catecholamine-synthesizing enzymes. We have found that the disruption of M2-receptor gene caused a compensatory decrease of cardiostimulatory β1-adrenoceptors and β2-adrenoceptors with corresponding down-regulation of the gene expression, M3-receptors were down-regulated as well. Missing M2-receptors were functionally replaced by the main cardioinhibitory β3-adrenoceptors that were up-regulated, not by cardioinhibitory M4-receptors. β3-adrenoceptors were found to signal through adenylyl cyclase instead of NO synthase. All these changes were found in the left ventricle only, so heterologous regulation is...
Expression of CD44 molecules in urothelial bladder cancer
Kuncová, Jitka ; Mandys, Václav (advisor) ; Smetana, Karel (referee) ; Hes, Ondřej (referee) ; Záťura, František (referee)
The main aim of presented work was to contribute to clarify the significance of changes in expression of adhesion molecules and CD44 in the malignant behavior of urothelial carcinomas of the urinary bladder. The individual stages to meet this goal were: 2.1 Detailed determination of expression of CD44s and CD44v6 protein in urothelial carcinomas of the urinary bladder in relation to the degree of tumor differentiation. 2.2 Determine the relationship of CD44 protein expression changes depending on the characteristics histomorphologic urothelial carcinoma of the urinary bladder, and other indicators of biological behavior of tumor (proliferative activity, p53 expression). 2.3 Evaluation of expression of CD44s and CD44v6 protein in two phenotypically distinct cell lines, urothelial carcinomas (HT1197 and 5637) and determine relationships CD44 expression on morphological and growth characteristics of tumor cells of these lines.

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4 Kuncová, Jana
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