The influence of candesartan and PD123319 on responses to angiotensin II in the hindquarters vascular bed of the rat

Hunter C. Champion; Trinity J. Bivalacqua; David G. Lambert; Dennis B. McNamara; Philip J. Kadowitz

The influence of candesartan and PD123319 on responses to angiotensin II in the hindquarters vascular bed of the rat

Hunter C. Champion, Trinity J. Bivalacqua, David G. Lambert, Dennis B. McNamara, Philip J. Kadowitz

Research output: Contribution to journal › Article › peer-review

Abstract

The effects of the AT₁ and AT₂ receptor blockers candesartan and PD123319 on hemodynamic responses to angiotensin II (AngII) were investigated in the anesthetized rat. Injections of AngII caused dose-related increases in systemic arterial and in hindquarters perfusion pressure that were reduced by candesartan. The inhibitory effects of candesartan were insurmountable, and a vasodepressor or vasodilator response to AngII was not unmasked. The AT₂ receptor antagonist PD123319 had no effect on increases in systemic arterial and hindquarters perfusion pressure in response to AngII. The present results suggest that pressor responses to AngII are mediated by the activation of AT₁ receptors, and that AT₂ receptors do not appear to modulate hemodynamic responses to AngII in the anesthetized rat.

Original language	English (US)
Pages (from-to)	S95-S97
Journal	Journal of the American Society of Nephrology
Volume	10
Issue number	1 SUPPL. 11
State	Published - Jan 1 1999
Externally published	Yes

ASJC Scopus subject areas

Nephrology

Cite this

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title = "The influence of candesartan and PD123319 on responses to angiotensin II in the hindquarters vascular bed of the rat",

abstract = "The effects of the AT1 and AT2 receptor blockers candesartan and PD123319 on hemodynamic responses to angiotensin II (AngII) were investigated in the anesthetized rat. Injections of AngII caused dose-related increases in systemic arterial and in hindquarters perfusion pressure that were reduced by candesartan. The inhibitory effects of candesartan were insurmountable, and a vasodepressor or vasodilator response to AngII was not unmasked. The AT2 receptor antagonist PD123319 had no effect on increases in systemic arterial and hindquarters perfusion pressure in response to AngII. The present results suggest that pressor responses to AngII are mediated by the activation of AT1 receptors, and that AT2 receptors do not appear to modulate hemodynamic responses to AngII in the anesthetized rat.",

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AU - Champion, Hunter C.

AU - Bivalacqua, Trinity J.

AU - Lambert, David G.

AU - McNamara, Dennis B.

AU - Kadowitz, Philip J.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - The effects of the AT1 and AT2 receptor blockers candesartan and PD123319 on hemodynamic responses to angiotensin II (AngII) were investigated in the anesthetized rat. Injections of AngII caused dose-related increases in systemic arterial and in hindquarters perfusion pressure that were reduced by candesartan. The inhibitory effects of candesartan were insurmountable, and a vasodepressor or vasodilator response to AngII was not unmasked. The AT2 receptor antagonist PD123319 had no effect on increases in systemic arterial and hindquarters perfusion pressure in response to AngII. The present results suggest that pressor responses to AngII are mediated by the activation of AT1 receptors, and that AT2 receptors do not appear to modulate hemodynamic responses to AngII in the anesthetized rat.

AB - The effects of the AT1 and AT2 receptor blockers candesartan and PD123319 on hemodynamic responses to angiotensin II (AngII) were investigated in the anesthetized rat. Injections of AngII caused dose-related increases in systemic arterial and in hindquarters perfusion pressure that were reduced by candesartan. The inhibitory effects of candesartan were insurmountable, and a vasodepressor or vasodilator response to AngII was not unmasked. The AT2 receptor antagonist PD123319 had no effect on increases in systemic arterial and hindquarters perfusion pressure in response to AngII. The present results suggest that pressor responses to AngII are mediated by the activation of AT1 receptors, and that AT2 receptors do not appear to modulate hemodynamic responses to AngII in the anesthetized rat.

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The influence of candesartan and PD123319 on responses to angiotensin II in the hindquarters vascular bed of the rat

Abstract

ASJC Scopus subject areas

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