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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Immunomodulatory potential of Sertoli cell progenitors during heart regeneration after injury in Xenopus
 Žabková, Světlana ; Krylov, Vladimír (advisor) ; Procházka, Jan (referee)
The high percentage of mortality associated with cardiovascular diseases shows the importance of studying cardiac muscle regeneration. An interesting approach for heart regeneration may be the use of a cell culture of Sertoli progenitor cells and peritubular myoid cells derived from juvenile testes of Xenopus tropicalis that was named XtiSC. These cells were found to share a number of characteristics which are typical for mesenchymal stem cells. Mesenchymal stems cells are well-known for their immunomodulatory and anti-inflammatory abilities that promote heart regeneration. The goal of this master thesis was to test the immunomodulatory potential of Sertoli progenitor cells during heart regeneration after heart apex amputation in Xenopus tropicalis without macrophages. The reason for macrophages depletion was the assumption that XtiSC behave like macrophages in many aspects. Clodronate encapsulated in liposomes was chosen as a tool for macrophage depletion. It was confirmed that XtiSC can positively influence heart regeneration in a classic model of heart regeneration, but also in a model with depletion of macrophages. It was revealed that Xenopus tropicalis adults without macrophages injected with XtiCS into the hindlimb skeletal muscle 3 days before apical resection showed reduced fibronectin...
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Immunomodulatory potential of Sertoli cell progenitors in Xenopus tadpoles during the healing of amputated tail
 Mertová, Irem ; Krylov, Vladimír (advisor) ; Procházka, Jan (referee)
A cell culture of common Sertoli and peritubular myoid cells progenitors derived from the testes of male X. tropicalis, called XtiSC, was established in the Laboratory of Developmental Biology. XtiSCs exhibit similar properties as more well-known mesenchymal stem cells that are used in cell therapy for their immunomodulatory and proregenerative properties. Microinjection of XtiSC into the dorsal vein of the tail of the tadpoles has increased macrophage numbers 7 days after tail amputation (dpa), both in controls and in tadpoles after depletion of macrophages by the application of clodrosomes. Macrophage depletion also reduces the migratory ability of XtiSC to the site of tail amputation. Macrophage depletion also led to a reduction in the number of satellite cells 1 dpa. On the seventh day after tail amputation and XtiSC injection, there was a significant increase in their number compared to the control group without XtiSC injection. Using DAF-2DA probe, nitric oxide production was confirmed by injected XtiSC and at the injury site. For future research of the proliferation, differentiation and migration of satellite cells in vivo, a vector expressing EGFP under endogenous Pax7 promoter and Katushka-RFP under gama-crystalline promoter was created and integrated into the X. tropicalis genome using...
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