[Involvement of protein kinase C in the regulation of Ca2+ exit from intracellular stores of prolactin stimulated pig oocytes].
Involvement of protein kinase C in the regulation of Ca2+ exit from intracellular stores of pig oocytes activated by prolactin was investigated, using the fluorescent dye chlortetracycline. In the presence of extracellular calcium, the inhibitor of protein kinase C Ro 31-8220 increased calcium exit from intracellular stores in pig oocytes after prolactin treatment. In calcium-free medium, Ro 31-8220 exerted effect on calcium release from intracellular stores. In calcium-free medium, prolactin did not stimulate calcium release from intracellular stores of oocytes in the presence of thimerosal, while in the presence of protein kinase C inhibitor, prolactin increased Ca2+ content from intracellular stores in such oocytes. These data suggest a direct involvement of protein kinase C in the processes of regulation of Ca2+ exit from intracellular stores of pig oocytes stimulated by prolactin.
Denisenko
V Iu
VIu
Research Institute of Farm Animal Genetics and Breeding, St. Petersburg, Pushkin.
Kuz'mina
T I
TI
D000818:Animals; D002118:Calcium / Q000378:metabolism* / Q000494:pharmacology; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005260:Female; D007211:Indoles / Q000494:pharmacology; D009865:Oocytes / Q000187:drug effects / Q000378:metabolism*; D011388:Prolactin / Q000494:pharmacology; D011493:Protein Kinase C / Q000037:antagonists & inhibitors / Q000378:metabolism*; D013552:Swine; D013849:Thimerosal
D004791:Enzyme Inhibitors; D007211:Indoles; D013849:Thimerosal; D011388:Prolactin; D011493:Protein Kinase C; D002118:Calcium; C064758:Ro 31-8220