Alteration of 1,2-diacylglycerol Content in Ischemic and Reperfused Heart

Overview

Journal Mol Cell Biochem

Publisher Springer

Specialty Biochemistry

Date 1990 Dec 3

PMID 2280765

Citations 1

Authors

T Kawai

K Okumura

H Hashimoto

T Ito

T Satake

Affiliations

Soon will be listed here.

Abstract

The myocardial 1,2-diacylglycerol (DG) and phospholipid levels during ischemia and reperfusion were studied in open-chest dogs by means of sequential epicardial minibiopsies, followed by quantification based on mass measurement technique. 1,2-DG level increased as early as 5 min after coronary ligation but decreased at 30 min. Also as early as 2 min after postischemic (35 min) reperfusion, 1,2-DG level increased transiently compared to pre-reperfusion level. Prazosin inhibited these changes significantly. A significant change in the incidence of reperfusion-induced ventricular tachycardia (VT) was not obtained in the prazosin-treated group. However, the 1,2-DG level 2 min after reperfusion was significantly higher in the ischemic myocardium developed reperfusion-induced VT than in the undeveloped one. Phospholipid levels remained unchanged during ischemia and reperfusion. These results suggest that alpha 1-adrenergic stimulation occurs early in ischemia and reperfusion and leads to 1,2-DG accumulation, which may be involved in the pathogenesis of ischemic and reperfusion injury.

Citing Articles

Changes in phosphoinositide-specific phospholipase C and phospholipase A2 activity in ischemic and reperfused rat heart.

Schwertz D, Halverson J Basic Res Cardiol. 1992; 87(2):113-27.

PMID: 1590734 DOI: 10.1007/BF00801959.

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