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Differential response of postischemic diabetic myocardium to a thromboxane-mimetic.

Abstract
The postischemic response of control, acute diabetic (48 h) and chronic diabetic (60 days) hearts was studied in isovolumically-perfused rat hearts. Isolated hearts were subjected to 20 min of total global ischemia with reperfusion at preischemic flow rates in the presence or absence of the thromboxane analogue, U-46619. A low concentration (30 nM) of U-46619 which did not produce significant hemodynamic responses prior to ischemia caused significant decreases in isovolumic left ventricular developed pressure and increases in coronary vascular resistance during reperfusion of control but not acute or chronic diabetic hearts. Simultaneously, U-46619 stimulated an additional increment of prostacyclin release during reperfusion of control but not diabetic hearts. Thus, while diabetic hearts may be resistant to certain stimuli of postischemic injury, a caveat results in that the diabetic heart may be jeopardized by a failure to counter other potentially thrombotic or vasospastic factors in vivo by an inadequate compensatory increase in prostacyclin.
AuthorsG M Pieper, G J Gross
JournalEicosanoids (Eicosanoids) Vol. 3 Issue 3 Pg. 127-33 ( 1990) ISSN: 0934-9820 [Print] Germany
PMID2242272 (Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Prostaglandin Endoperoxides, Synthetic
  • 15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid
  • Epoprostenol
Topics
  • 15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid
  • Animals
  • Blood Pressure (drug effects)
  • Diabetes Mellitus, Experimental (physiopathology)
  • Epoprostenol (metabolism)
  • Heart (drug effects)
  • Hemodynamics (drug effects)
  • Male
  • Myocardial Reperfusion
  • Prostaglandin Endoperoxides, Synthetic (pharmacology)
  • Rats
  • Rats, Inbred Strains
  • Time Factors

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