What question did this study set out to answer?

To determine whether inhibiting phospholipid degradation and arachidonic acid liberation prevents sarcolemmal membrane defects during metabolic ATP depletion in cultured myocardial cells.

October 1, 1988Journal of Clinical InvestigationOpen Access

Inhibition of the release of arachidonic acid prevents the development of sarcolemmal membrane defects in cultured rat myocardial cells during adenosine triphosphate depletion.

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Authors

ASA SenCardiovascular Institute of the South JMJames C. MillerIndiana University Health RRRobert D. ReynoldsBrigham and Women's Hospital

Discussion

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Implication

In vitro study demonstrates that blocking arachidonic acid release preserves sarcolemmal integrity in ATP-depleted rat myocardial cells, indicating phospholipid degradation causes membrane damage.

Key Points

To determine whether inhibiting phospholipid degradation and arachidonic acid liberation prevents sarcolemmal membrane defects during metabolic ATP depletion in cultured myocardial cells.
Cultured rat myocardial cells were exposed to the metabolic inhibitor iodoacetate to induce ATP depletion and arachidonic acid liberation.
Cells were pretreated with the synthetic steroidal diamine phospholipase inhibitor U26,384.
Assessed labeled phosphatidylcholine breakdown, arachidonic acid release, sarcolemmal membrane defects, creatine kinase leakage, and cellular ATP concentrations.
Pretreatment with U26,384 blocked the degradation of labeled phosphatidylcholine and completely suppressed arachidonic acid release during ATP depletion.
Inhibition of phospholipid degradation with U26,384 prevented the formation of sarcolemmal membrane defects and blocked the release of creatine kinase from myocardial cells.
U26,384 exerted its membrane-protective effects without altering the rate or extent of iodoacetate-induced ATP depletion.

Cite This Study

Sen et al. (1988) studied this question.

synapsesocial.com/papers/6a7d62a83575152c8237e1d6 https://doi.org/10.1172/jci113735

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Implication

In vitro study demonstrates that blocking arachidonic acid release preserves sarcolemmal integrity in ATP-depleted rat myocardial cells, indicating phospholipid degradation causes membrane damage.

Inhibition of the release of arachidonic acid prevents the development of sarcolemmal membrane defects in cultured rat myocardial cells during adenosine triphosphate depletion.

Discussion

Member takes

Implication

Key Points

Cite This Study

Inhibition of the release of arachidonic acid prevents the development of sarcolemmal membrane defects in cultured rat myocardial cells during adenosine triphosphate depletion.

Discussion

Member takes

Implication

Key Points

Cite This Study

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