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[Antagonizing effects of novel multipeptid analogues on endothelin receptors and their pharmacological characteristics in cardiovascular system]. | LitMetric

AI Article Synopsis

Article Abstract

Aim: To investigate the antagonistic effects of the novel compounds on vasoconstriction induced by ET-1 and the effect on the blood pressure of stroke-prone spontaneously hypertensive rats.

Methods: Organ bath experiment and whole cardiac function experiment were used.

Results: The analogues of o-CPhe-D-Trp-D-Phe(-X)-OH showed good ability against endothelin biological effects. When X was displaced by 3-F, 3-Cl or 4-Cl, the novel compounds inhibit the vascular constriction induced by ET-1 in a concentration-dependent manner, the IC50 +/- L95 were (0.09 +/- 0.05), (0.15 +/- 0.06) or (0.11 +/- 0.03) mumol.L-1 respectively. The blood pressure of stroke-prone spontaneously hypertensive rats was decreased. No significant effect on cardiac function of rats was discovered.

Conclusion: The results demonstrate that among the six kinds of compounds, those with o-CPhe-D-Trp-D-Phe (-X)-OH configuration showed good biological effects.

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