Phospholipase C activation and diacylglycerol kinase inactivation lead to an increase in diacylglycerol content in spontaneously hypertensive rat.

Abstract:

:Activities of three kinases, phosphatidylinositol (PI), phosphatidylinositol 4-phosphate (PIP), and diacylglycerol (DG) kinases, and phospholipase C were measured in erythrocyte ghosts from spontaneously hypertensive rats (SHR) and normotensive Wistar Kyoto rats (WKY). PI kinase activity was significantly higher in SHR than WKY but there was no significant difference in PIP kinase activity between SHR and WKY. The activity of phospholipase C, which hydrolyzes PIP2, was also increased in SHR. However, DG kinase activity was, on the contrary, decreased in SHR. These results suggest that there is a tendency to accumulate DG in SHR. Indeed, DG content in erythrocytes of SHR increased 1.7-fold compared to that of WKY. Such DG accumulation may cause the sustained activation of protein kinase C in SHR, since DG is a physiological activator for protein kinase C.

authors

Kato H,Takenawa T

doi

10.1016/0006-291x(87)90808-4

subject

Has Abstract

pub_date

1987-08-14 00:00:00

pages

1419-24

issue

3

eissn

0006-291X

issn

1090-2104

pii

0006-291X(87)90808-4

journal_volume

146

pub_type

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