Abstract

Treatment of rats with indomethacin, 1.5 mg/kg per day, for one week, significantly reduced the number of β-adrenoceptors in the heart without altering their affinity for the specific β-adrenergic ligand. In indomethacin-treated rats there was a reduction in the cardiac response to epinerphrine in vivo as indicated by a shift to the right of the epinephrine dose-heart rate response curve. These results support a possibl interference by indomethacin in β-adrenoceptor-mediated effects.

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