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- W2266556603 abstract "Several lines of evidence suggest a paracrine regulatory role for endothelin (ET) in the release of atrial natriuretic peptide (ANP). To investigate this possibility, we used the ET A-type receptor (ETA-R) competitive inhibitor cyclo(D-Asp-Pro-D-Val-Leu-D-Trp) (BQ-123) in isolated perfused atria to determine the effect of endogenously produced ET on the release of ANP. Initially, we found that high pressure (8-10 mmHg) increased the mean ANP secretion rate by 117.3 +/- 21.2% (P < 0.05). Next, we found that at high pressure 50 nM of exogenously applied ET significantly augmented the stretch-induced release of ANP (P < 0.05) and that this response could be significantly attenuated in a dose-dependent manner by 1 and 3 microM BQ-123 (P < 0.05). These experiments proved the efficacy of the inhibitor in our model. Subsequently, we found that the stretch-induced release of ANP was significantly reduced to 51.5 +/- 13.0 and 22.3 +/- 11.8% by 1 and 3 microM BQ-123, respectively (P < 0.05). Because the perfused atria model eliminates systemic cardiovascular effects, allows control and direct recording of the intra-atrial pressure, and preserves the potential endothelium-myocyte control system, we conclude that the stretch-induced release of ANP is partially regulated by ET and that the ET is locally produced and constitutes a paracrine control system." @default.
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- W2266556603 date "1995-11-01" @default.
- W2266556603 modified "2023-09-26" @default.
- W2266556603 title "Endothelin acts as a paracrine regulator of stretch-induced atrial natriuretic peptide release" @default.
- W2266556603 doi "https://doi.org/10.1152/ajpregu.1995.269.5.r1093" @default.
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