Positive Lusitropic Effect of Quercetin on Isolated Ventricular Myocardia from Normal and Streptozotocin-Induced Diabetic Mice

Shogo Hamaguchi; Kohei Abe; Momoka Komatsu; Jun Kainuma; Iyuki Namekata; Hikaru Tanaka

doi:10.1248/bpb.b21-00580

Notes

Positive Lusitropic Effect of Quercetin on Isolated Ventricular Myocardia from Normal and Streptozotocin-Induced Diabetic Mice

Shogo Hamaguchi , Kohei Abe, Momoka Komatsu, Jun Kainuma, Iyuki Namekata, Hikaru Tanaka

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Keywords: quercetin, myocardium, lusitropy, sarco–endoplasmic reticulum Ca²⁺-ATPase

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2021 Volume 44 Issue 12 Pages 1894-1897

DOI https://doi.org/10.1248/bpb.b21-00580

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Abstract

The lusitropic effect of quercetin was examined on isolated ventricular myocardial tissue preparations from normal and streptozotocin-induced diabetic mice. The time required for 90% relaxation of the myocardium, which was prolonged in the diabetic mice, was shortened by quercetin in both normal and diabetic myocardia. This effect of quercetin was completely inhibited by cyclopiazonic acid but not by SEA0400. These results indicated that quercetin accelerates myocardial relaxation through activation of the sarco–endoplasmic reticulum Ca²⁺-ATPase.

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