Upregulation of Bradykinin B1-receptor Expression After Myocardial Infarction

Overview

Journal Br J Pharmacol

Publisher Wiley

Specialty Pharmacology

Date 2000 Apr 26

PMID 10780955

Citations 9

Authors

C Tschope

S Heringer-Walther

M Koch

F Spillmann

M Wendorf

E Leitner

H P Schultheiss

T Walther

Affiliations

Soon will be listed here.

Abstract

To determine the influence of the myocardial infarction (MI) on bradykinin B1-receptor (B1R) regulation, we studied its expression in the left ventricle (LV) after MI. Rats were submitted to a permanent occlusion of the left coronary artery. Six hours, 24 h and 6 days after MI or after sham operation, left ventricular pressure (LVP) and dP/dt(max) were measured. LV-total RNA was extracted and B1R expression was analysed by a RNase-protection assay (each group n = 6). LVP and dP/dt(max) were impaired at all time points after MI. Basal B1R expression was not detectable in controls. Six hours after MI, the B1R expression was upregulated and reached a maximum 24 h after MI (4 fold vs. 6 h). Six days post-MI, B1R expression returned to levels found 6 h after MI. These data are the first demonstration for an induced myocardial B1R expression in an in vivo model of MI.

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