National Repository of Grey Literature 5 records found  Search took 0.01 seconds. 
Axon, in development and injury
Polčanová, Zuzana ; Kárová, Kristýna (advisor) ; Novák, Ondřej (referee)
The cytoskeletal structure of growth cones plays an important role in both the development of the nervous system and during periods of axon re- generation. The growth cone is a highly dynamic structure located at the tip of growing axons, providing navigation and movement. Signalling cascades are activated that lead to the regulation of the growth cone cytoskeleton, defining its displacement, rotation, or collapse. Despite advances in under- standing guidance cues and their mechanisms of action, knowledge of what happens to the nervous system after injury is lacking. Unlike axons in the peripheral nervous system (PNS), that are able to regenerate after neuronal injury, axons in the central nervous system (CNS) loose regenerative ability as they mature. Unravelling the mechanisms of axon guidance, together with their behaviour after axotomy and regeneration, is extremely important for the understanding of CNS injuries and to provide treatment of these injuries in the future.
: Investigation of lymphocyte populations in the porcine small intestine
Kárová, Kristýna ; Šinkora, Marek (advisor) ; Javorková, Eliška (referee)
8 ABSTRACT Historically pig is allocated to a group of animals which use certain parts of their small intestine to acquire a fully developed primary B cell reperoire. Development of such primary repertoire is independent on the antigen presence and resembles the primary lymphopoietic activity of avian bursa of Fabricius. However, some findings concernig the pig's alignment in the above mentioned group suggest otherwise. This graduation thesis is focused on the investigtion of lymphocyte populations and subpopulations in the small intestine of germ-free and conventional piglets. The aim is to determine whether the percentage amounts of lymphocyte populations is dependent on the intestinal colonization. Using Flow Cytometry the significant differences between individual samples were assesed allowing us to conclude which parts of the small intestine could possibly be used for the development of B cell repertoire. Moreover, the status of isotype switching of B lymphocytes isolated from different intestinal parts was determined by the means of PCR analysis. Our data suggest that the small intestine colonization has a crucial role in development of all the main lymphocyte populations as well as some of their subpopulations. The greatest influence of colonization was observed concerning B lymphocytes and their...
Anti-inflammatory compounds and stem cells in treatment of spinal cord injury
Kárová, Kristýna ; Jendelová, Pavla (advisor) ; Sameš, Martin (referee) ; Chvátal, Alexandr (referee)
Despite intense scientific efforts, spinal cord injury (SCI) remains to be a severe neurological condition that has no treatment. Currently, therapy is based on alleviating pressure by surgical spinal cord decompression, administration of methylprednisolone and physical therapy. In this study, therapeutic effects of anti-inflammatory compounds and of three types of stem cells were tested in a balloon compression model of spinal cord injury in rats. Natural compounds epigallocatechin-3-gallate (EGCG) or curcumin were administered in situ and then intraperitoneally every day for up to 28 days. Human bone marrow mesenchymal stem cells (MSCs), human spinal neural precursors (SPC-01) and neural precursors derived from human induced pluripotent stem cells (iPS-NPs) were transplanted intrathecally (MSCs) or via spinal injection into immunosuppressed rats 7 days after induction of SCI. To determine effects of therapies, changes in motor function was tested by open field test BBB, flat beam test and score, Plantar test and rotarod. Morphometric analysis was used to assess gray/matter sparing and cavity size. Immunohistochemistry was used to determine survival and differentiation of transplanted cells, activation of classical pathway of NFκB (p65 nuclear translocation), astroglial activation (GFAP) and...
Anti-inflammatory compounds and stem cells in treatment of spinal cord injury
Kárová, Kristýna ; Jendelová, Pavla (advisor) ; Sameš, Martin (referee) ; Chvátal, Alexandr (referee)
Despite intense scientific efforts, spinal cord injury (SCI) remains to be a severe neurological condition that has no treatment. Currently, therapy is based on alleviating pressure by surgical spinal cord decompression, administration of methylprednisolone and physical therapy. In this study, therapeutic effects of anti-inflammatory compounds and of three types of stem cells were tested in a balloon compression model of spinal cord injury in rats. Natural compounds epigallocatechin-3-gallate (EGCG) or curcumin were administered in situ and then intraperitoneally every day for up to 28 days. Human bone marrow mesenchymal stem cells (MSCs), human spinal neural precursors (SPC-01) and neural precursors derived from human induced pluripotent stem cells (iPS-NPs) were transplanted intrathecally (MSCs) or via spinal injection into immunosuppressed rats 7 days after induction of SCI. To determine effects of therapies, changes in motor function was tested by open field test BBB, flat beam test and score, Plantar test and rotarod. Morphometric analysis was used to assess gray/matter sparing and cavity size. Immunohistochemistry was used to determine survival and differentiation of transplanted cells, activation of classical pathway of NFκB (p65 nuclear translocation), astroglial activation (GFAP) and...
: Investigation of lymphocyte populations in the porcine small intestine
Kárová, Kristýna ; Šinkora, Marek (advisor) ; Javorková, Eliška (referee)
8 ABSTRACT Historically pig is allocated to a group of animals which use certain parts of their small intestine to acquire a fully developed primary B cell reperoire. Development of such primary repertoire is independent on the antigen presence and resembles the primary lymphopoietic activity of avian bursa of Fabricius. However, some findings concernig the pig's alignment in the above mentioned group suggest otherwise. This graduation thesis is focused on the investigtion of lymphocyte populations and subpopulations in the small intestine of germ-free and conventional piglets. The aim is to determine whether the percentage amounts of lymphocyte populations is dependent on the intestinal colonization. Using Flow Cytometry the significant differences between individual samples were assesed allowing us to conclude which parts of the small intestine could possibly be used for the development of B cell repertoire. Moreover, the status of isotype switching of B lymphocytes isolated from different intestinal parts was determined by the means of PCR analysis. Our data suggest that the small intestine colonization has a crucial role in development of all the main lymphocyte populations as well as some of their subpopulations. The greatest influence of colonization was observed concerning B lymphocytes and their...

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