Мобілізація Cа2+ із внутрішньоклітинних депо ооцитов Sus scrofa domesticus після вітрифікації та відігріву

• Datum: 2018
• Hauptverfasser: Denisenko, Vitaliy Yu., Kuzmina, Tatiana I.
• Format: Artikel
• Sprache: English
• Veröffentlicht: Publishing House ‘Akademperiodyka’ of the National Academy of Sciences of Ukraine; Institute for Problems of Cryobiology and Cryomedicine 2018
• Schlagworte: кальцій; вітрифікація; ооцити; Sus Scrofa Domesticus
• Online Zugang: https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1430
• Назва журналу: Problems of Cryobiology and Cryomedicine

Despite a significant progress in cryopreservation of embryos and male gametes, the vitrification of animal oocytes has been still a complicated and not fully resolved task due to a high sensitivity of female gamete cell compartments to the effects of ultralow temperatures and osmotic stress. This study was aimed to identify the intracellular mechanisms, determining the cryoresistance of animal oocytes. The features of Ca2 + mobilization from intracellular stores in vitrified porcine oocytes were studied using the fluorescent probe chlortetracycline. In these cells the relationship between different intracellular Ca2+ stores (IP3 and ryanodine sensitive), provided by microfilament participation, was established to be destroyed, and that between various intracellular Ca2+ stores, formed by microtubules, underwent certain changes. The guanosine triphosphate in vitrified oocytes became incapable of forming the bond between different intracellular stores, whereas the nanoparticles of highly dispersed silica preserved it. The bond between different intracellular Ca2+ stores in the oocytes, subjected to vitrification and thawing, was established to be provided not only by microtubules, but protein kinase C as well.Probl Cryobiol Cryomed 2018; 28(2): 120-130