RT Journal Article
SR Electronic
T1 STUDIES ON THE MECHANISM OF THE POSITIVE INOTROPIC ACTION OF MALONATE
JF Journal of Pharmacology and Experimental Therapeutics
JO J Pharmacol Exp Ther
FD American Society for Pharmacology and Experimental Therapeutics
SP 443
OP 450
VO 117
IS 4
A1 Covin, Jerome M.
A1 Berman, David A.
YR 1956
UL http://jpet.aspetjournals.org/content/117/4/443.abstract
AB The effect of substrates on the positive inotropic action of malonate on electrically stimulated rat ventricle strips was investigated. Malonate exerted a marked positive inotropic effect in substrate-free and glucose-containing media, but not when pyruvate was employed as a substrate. The positive inotropic action of malonate was inhibited by iodoacetate. The magnitude and time course of the positive inotropic effect of malonate was similar to the positive inotropic action of pyruvate. A working hypothesis for the mechanism of the positive inotropic action of malonate is that malonate by an action on the Embden-Meyerhof pathway eliminates a rate limiting step in the conversion of glycogen and glucose to pyruvate.