Fructose 1,6-diphosphate administration attenuates post-ischemic ventricular dysfunction

Jeffrey E. Cohen, Pavan Atluri, Matthew D. Taylor, Todd J. Grand, George P. Liao, Corinna M. Panlilio, Erik E. Suarez, Suzanne E. Zentko, Vivian M. Hsu, Mark F. Berry, Maximillian J. Smith, Timothy J. Gardner, H. Lee Sweeney, Y. Joseph Woo

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Background: Cardiomyocyte energy production during ischemia depends upon anaerobic glycolysis inefficiently yielding two ATP per glucose. Substrate augmentation with fructose 1,6-diphosphate (FDP) bypasses the ATP consuming steps of glucokinase and phosphofructokinase thus yielding four ATP per FDP. This study evaluated the impact of FDP administration on myocardial function after acute ischemia. Methods: Male Wistar rats, 250-300 g, underwent 30 min occlusion of the left anterior descending coronary artery followed by 30 min reperfusion. Immediately prior to both ischemia and reperfusion, animals received an intravenous bolus of FDP or saline control. After 30 min reperfusion, myocardial function was evaluated with a left ventricular intracavitary pressure/volume conductance microcatheter. For bioenergetics studies, myocardium was isolated at 5 min of ischemia and assayed for ATP levels. Results: Compared to controls (n = 8), FDP animals (n = 8) demonstrated significantly improved maximal left ventricular pressure (100.5 ± 5.4 mmHg versus 69.1 ± 1.9 mmHg; p < 0.0005), dP/dt (5296 ± 531 mmHg/s versus 2940 ± 175 mmHg/s; p < 0.0028), ejection fraction (29.1 ± 1.7% versus 20.4 ± 1.4%; p < 0.0017), and preload adjusted maximal power (59.3 ± 5.0 mW/μL2 versus 44.4 ± 4.6 mW/μL2; p < 0.0477). Additionally, significantly enhanced ATP levels were observed in FDP animals (n = 5) compared to controls (n = 5) (535 ± 156 nmol/g ischemic tissue versus 160 ± 9.0 nmol/g ischemic tissue; p < 0.0369). Conclusions: The administration of the glycolytic intermediate, FDP, by intravenous injection, resulted in significantly improved myocardial function after ischemia and improved bioenergetics during ischemia.

Original languageEnglish (US)
Pages (from-to)119-123
Number of pages5
JournalHeart Lung and Circulation
Volume15
Issue number2
DOIs
StatePublished - Apr 2006

Keywords

  • ATP
  • Fructose 1,6-diphosphate
  • Glycolysis
  • Myocardial ischemia
  • Ventricular function

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine
  • Cardiology and Cardiovascular Medicine

Fingerprint Dive into the research topics of 'Fructose 1,6-diphosphate administration attenuates post-ischemic ventricular dysfunction'. Together they form a unique fingerprint.

Cite this