1,2‐diacylglycerols mimic phorbol 12‐myristate 13‐acetate activation of the sea urchin egg
- 1 May 1986
- journal article
- research article
- Published by Wiley in Journal of Cellular Physiology
- Vol. 127 (2), 330-340
- https://doi.org/10.1002/jcp.1041270222
Abstract
Phorbol diesters have been reported to stimulate the Na+/H+ antiport of a variety of cells including sea urchin eggs. Since stimulation of the Na+/H+ antiport is necessary for metabolic derepression during fertilization and protein kinase C is a target of phorbol diesters, enhanced Na+/H+ exchange during fertilization may be a result of protein kinase C activity. Protein kinase C is probably physiologically activated by diacylglycerols, which are derived from hydrolysis of phosphatidylinositol. Treatment of sea urchin eggs with 1,2‐diacylglycerols was found to stimulate the Na+/H+ antiport. The 1,3‐isomers were without effect. Further, the effects of 1,2‐diacylglycerol and phorbol diester are not additive with respect to Na+/H+ exchange. While a direct participation of protein kinase C activity during fertilization remains to be demonstrated, these data support the hypothesis that protein kinase C activity plays a role in fertilization. However, the cytotoxic effect of protein kinase C activators suggests effects associated with their pleiotropic nature.This publication has 49 references indexed in Scilit:
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