Diacylglycerol fatty acid composition is related to activation of protein kinase C in cultured cardiomyocytes.
Using cultures of beating neonatal rat cardiomyocytes we have studied the fatty acid composition of the diacylglycerol produced after different stimulation times with an alpha 1-agonist (phenylephrine) and we have related it to the previously reported time course of the activation of particulate protein kinase C, in control cells and in cells grown in a medium supplemented with docosahexaenoic acid. Gas chromatography of the diacylglycerol produced after stimulation revealed significant differences between control cells and cells treated with docosahexanoic acid. In the cells treated with docosahexanoic acid, the more persistent activation of the membrane-bound protein kinase C might be sustained by an enrichment of diacylglycerol with docosahexanoic acid. The modification of the fatty acid composition of diacylglycerol can cause an alteration in the response of the cells to alpha 1-adrenoceptor stimulation.
Bordoni
A
A
Department of Biochemistry G Moruzzi, University of Bologna, Italy.
Biagi
P L
PL
Turchetto
E
E
Rossi
C A
CA
Hrelia
S
S
D000818:Animals; D002478:Cells, Cultured; D002849:Chromatography, Gas; D004075:Diglycerides / Q000032:analysis*; D004281:Docosahexaenoic Acids / Q000494:pharmacology; D004789:Enzyme Activation; D005227:Fatty Acids / Q000032:analysis*; D009206:Myocardium / Q000201:enzymology / Q000378:metabolism*; D010656:Phenylephrine / Q000494:pharmacology; D011493:Protein Kinase C / Q000378:metabolism*; D051381:Rats; D017208:Rats, Wistar
D004075:Diglycerides; D005227:Fatty Acids; D010656:Phenylephrine; D004281:Docosahexaenoic Acids; D011493:Protein Kinase C