Journal article

Losing control: Positive and negative feedback in the renin angiotensin system

MC Thomas, C Tikellis

Current Hypertension Reviews | Published : 2009

Abstract

The renin angiotensin system (RAS) is a key homeostatic regulator that relies on feedback regulation to achieve and sustain the delicate balance required for healthy physiological function. A number of negative feedback loops exist within the RAS that counterbalance the effects of conventional RAS blockade. Indeed, instead of reducing levels of Ang II and aldosterone, exaggerated feedback responses lead to a paradoxical elevation in many patients treated with RAS blockers. This 'escape' has been used to explain a number of clinically-relevant phenomena including progressive left ventricular hypertrophy, deteriorating cardiac and renal function in the face of full-dose RAS blockade. Escape ha..

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University of Melbourne Researchers

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