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...
Mechanism and risk factors for the development of monozygotic twins in mammals
Žabková, Světlana ; Krylov, Vladimír (advisor) ; Petr, Jaroslav (referee)
Monozygotic twins result from the splitting of one embryo in early embryonic development. The developmental stage, in which the splitting occurs, is the main factor determining the degree of sharing fetal sacs. The etiology and mechanism of monozygotic twinning are still unknown. The human and two species of armadillo, Dasypus novemcinctus and Dasypus hybridus are the only mammals that regularly produce monozygotic multiple pregnancies. The spontaneous occurrence of monozygotic twinning is 0,45 % of all births. The monozygotic twin pregnancies have been reported to occur at a higher rate following the increasing interest of assisted reproduction technologies. In certain consideration, we understand them as a side effect of infertility treatment because monozygotic twins result in a higher rate of prenatal mortality, premature birth and congenital anomalies than singleton pregnancies. This bachelor thesis aims to summarize knowledge about the formation of monozygotic twins in mammals. Also, it tries to discuss potential mechanisms and risk factors which could influence their formation. Monozygotic twins are an important model for explaining the genetic predisposition of some diseases. The thesis also introduces the ways of experimental production of monozygotic twins. Keywords: monozygotic twins,...

See also: similar author names
1 Žabková, Sandra
1 Žabková, Simona
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