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In perfused human umbilical arteries both angiotensin I and II induced vasoconstriction with a monophasic response. Angiotensin I and II induced vasoconstrictions at doses ≥10?8M and 10?9 M respectively. Captopril inhibited the angiotensin I response while the angiotensin II receptor blocker Sar1-Ala8 AII inhibited the effect of both angiotensins. PGI2 attenuated the angiotensin II response in a dose dependent pattern. PGE2 and PGF2α in concentrations below the critical levels for creating pressure responses , also attenuated the angiotensin II response. The cyclooxygenase inhibitor indomethacin potentiated the angiotensin II response indicating that endogenous production of prostanoids is of importance in the modulation of angiotensin effects. 相似文献
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K Bj?ro 《Prostaglandins》1985,30(6):989-998
In perfused human umbilical arteries both angiotensin I and II induced vasoconstriction with a monophasic response. Angiotensin I and II induced vasoconstrictions at doses greater than or equal to 10(-8) M and 10(-9) M respectively. Captopril inhibited the angiotensin I response while the angiotensin II receptor blocker Sar1-Ala8 AII inhibited the effect of both angiotensins. PGI2 attenuated the angiotensin II response in a dose dependent pattern. PGE2 and PGF2 alpha in concentrations below the critical levels for creating pressure responses per se, also attenuated the angiotensin II response. The cyclooxygenase inhibitor indomethacin potentiated the angiotensin II response indicating that endogenous production of prostanoids is of importance in the modulation of angiotensin effects. 相似文献