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Examination of the genes DNM2, GARS, MORC2, TRPV4 and SOD1 among Czech patients with hereditary neuropathy axonal type
Neupauerová, Jana ; Laššuthová, Petra (advisor) ; Vlčková, Eva (referee) ; Vasovčák, Peter (referee)
Examination of the genes DNM2, GARS, MORC2, TRPV4 and SOD1 among Czech patients with hereditary neuropathy axonal type For my PhD thesis I chose to work with patients with axonal form of CMT, because at that time axonal forms were less likely to be clarified by classical methods of molecular genetics. For further examination in patients with unclear cause of the axonal CMT, the genes DNM2, GARS and TRPV4 were selected. The aim was to determine the significance of pathogenic mutations in these genes as the cause of CMT2 in Czech patients. In the course, we identified causal variants in the genes MORC2 and SOD1 with WES. Therefore, we have tested additional CMT2 patients for the presence of these variants. Using Sanger sequencing, I examined a representative set of patients for the DNM2 (37), GARS (10) and TRPV4 (24) genes without finding a causal mutation, then we investigated genes SOD1 (43 patients) and MORC2 (161 patients). The cohort (50 patients) was also subjected to MLPA analysis using a P406-A1 CMT2 duplication and deletion detection kit for genes RAB7A, GARS, HSPB1, HSBP8 and SPTLC1 (kit P406-A1 CMT2). At that time, massively parallel sequencing (MPS) was becoming important. We compared the cost of classical sequencing versus MPS, and accordingly, we decided that the genes DNM2, GARS, MORC2, TRPV4...
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The role of dynamin in human pathologies
Zavadilová, Kristýna ; Macůrková, Marie (advisor) ; Voleman, Luboš (referee)
Dynamin (DNM) belongs to the family of large GTPases, which are characterized by their ability to hydrolyse GTP. Although DNM participates in many cell processes such as synaptic recycling, Golgi transport or regulation of cytoskeletal dynamics, its most imporant function is membrane scission during vesicle budding from the plasma during clathrin-mediated endocytosis. Human DNM is encoded by three different genes. DNM1 and DNM3 are most expressed in the nervous system, particularly in the brain, whereas DNM2 is expressed ubiquitously. Mutations in this gene cause two congenital neuromuscular diseases. One of them is autosomal dominant type of Centronuclear myopathy, manifested by skeletal muscle atrophy, the other is dominant intermediate type of Charcot-Marie-Tooth neuropathy, which affects myelination and neurotransmission in the peripheral nervous system. Myopathy mutations may increase GTPase activity and higher DNM2 oligomerization, while neuropathy mutations may cause decreased GTPase activity and loss of phospholipid binding properties of DNM2. Despite these findings, the mechanism by which DNM2 cause these two diseases is still unknown. By understanding the function of DNM in cell processes can help in outlining therapeutic approaches for the aforementioned diseases.
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Examination of the genes DNM2, GARS, MORC2, TRPV4 and SOD1 among Czech patients with hereditary neuropathy axonal type
Neupauerová, Jana ; Laššuthová, Petra (advisor) ; Vlčková, Eva (referee) ; Vasovčák, Peter (referee)
Examination of the genes DNM2, GARS, MORC2, TRPV4 and SOD1 among Czech patients with hereditary neuropathy axonal type For my PhD thesis I chose to work with patients with axonal form of CMT, because at that time axonal forms were less likely to be clarified by classical methods of molecular genetics. For further examination in patients with unclear cause of the axonal CMT, the genes DNM2, GARS and TRPV4 were selected. The aim was to determine the significance of pathogenic mutations in these genes as the cause of CMT2 in Czech patients. In the course, we identified causal variants in the genes MORC2 and SOD1 with WES. Therefore, we have tested additional CMT2 patients for the presence of these variants. Using Sanger sequencing, I examined a representative set of patients for the DNM2 (37), GARS (10) and TRPV4 (24) genes without finding a causal mutation, then we investigated genes SOD1 (43 patients) and MORC2 (161 patients). The cohort (50 patients) was also subjected to MLPA analysis using a P406-A1 CMT2 duplication and deletion detection kit for genes RAB7A, GARS, HSPB1, HSBP8 and SPTLC1 (kit P406-A1 CMT2). At that time, massively parallel sequencing (MPS) was becoming important. We compared the cost of classical sequencing versus MPS, and accordingly, we decided that the genes DNM2, GARS, MORC2, TRPV4...
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