No synergism between ionomycin and phorbol ester in fatty acid synthesis by isolated rat hepatocytes |
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Authors: | W J Vaartjes C Bijleveld M J Geelen S G van den Bergh |
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Institution: | 1. Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College, Jimei University, Xiamen 361021, China;2. Calysta (China) Ltd., Shanghai 200041, China;3. Calysta (UK) Ltd., Redcar, Cleveland, UK |
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Abstract: | With hepatocytes in suspension, freshly isolated from meal-fed rats, no significant effect of ionomycin on the rate of de novo fatty acid synthesis was observed, whereas phorbol myristate acetate (PMA) was strongly stimulatory. The combination of ionomycin and PMA produced the same stimulation as was seen with PMA alone. Stimulation of fatty acid synthesis by vasopressin was comparable and not additive to that observed with PMA, indicating that activation of protein kinase C is solely responsible for this metabolic effect of vasopressin. Both vasopressin and PMA increased acetyl-CoA carboxylase activity in isolated rat hepatocytes. |
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