Effects of Guanine Nucleotides and Protein Kinase C on Prolactin-Stimulated Release of Ca2+ from Intracellular Stores of Pig Oocytes

Effects of Guanine Nucleotides and Protein Kinase C on Prolactin-Stimulated Release of Ca2+ from... The effects of guanine nucleotides and protein kinase C on prolactin-stimulated Ca2+ release from intracellular stores of pig oocytes were studied using the fluorescent dye chlorotetracycline. The effect of prolactin was related to the protein kinase C activation. Inhibition of protein kinase C stimulated Ca2+ release from intracellular stores of the pig oocytes treated with 5 ng/ml prolactin in the presence of extracellular Ca2+ and inhibited Ca2+ release from intracellular stores of the pig oocytes treated with 50 ng/ml prolactin. In a Ca2+-free medium, prolactin did not stimulate Ca2+ release from intracellular stores of the oocytes treated with GDP in the presence of GDP. GTP inhibition of protein kinase C activated Ca2+ release from intracellular stores of the pig oocytes treated with 5 ng/ml prolactin and inhibited Ca2+ release from intracellular stores of the pig oocytes treated with 50 ng/ml prolactin. These data suggest the influence of guanine nucleotides and protein kinase C on calcium metabolism, stimulated by prolactin. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Developmental Biology Springer Journals

Effects of Guanine Nucleotides and Protein Kinase C on Prolactin-Stimulated Release of Ca2+ from Intracellular Stores of Pig Oocytes

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Publisher
Nauka/Interperiodica
Copyright
Copyright © 2005 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Developmental Biology; Animal Anatomy / Morphology / Histology
ISSN
1062-3604
eISSN
1608-3326
D.O.I.
10.1007/s11174-005-0025-7
Publisher site
See Article on Publisher Site

Abstract

The effects of guanine nucleotides and protein kinase C on prolactin-stimulated Ca2+ release from intracellular stores of pig oocytes were studied using the fluorescent dye chlorotetracycline. The effect of prolactin was related to the protein kinase C activation. Inhibition of protein kinase C stimulated Ca2+ release from intracellular stores of the pig oocytes treated with 5 ng/ml prolactin in the presence of extracellular Ca2+ and inhibited Ca2+ release from intracellular stores of the pig oocytes treated with 50 ng/ml prolactin. In a Ca2+-free medium, prolactin did not stimulate Ca2+ release from intracellular stores of the oocytes treated with GDP in the presence of GDP. GTP inhibition of protein kinase C activated Ca2+ release from intracellular stores of the pig oocytes treated with 5 ng/ml prolactin and inhibited Ca2+ release from intracellular stores of the pig oocytes treated with 50 ng/ml prolactin. These data suggest the influence of guanine nucleotides and protein kinase C on calcium metabolism, stimulated by prolactin.

Journal

Russian Journal of Developmental BiologySpringer Journals

Published: Jun 21, 2005

References

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