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In hypertension, the kidney breaks your heart

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Abstract

The renin-angiotensin system (RAS) is a master regulator of blood pressure and fluid homeostasis. Because RAS components are expressed in several tissues that may influence blood pressure, studies using conventional gene targeting to globally interrupt the RAS have not determined the contributions of angiotensin II receptor type 1 (AT1) receptors in specific tissue pools to blood pressure regulation and tissue injury. Recent experiments using kidney cross-transplantation and mice lacking the dominant murine AT1 receptor isoform, AT 1A, have demonstrated that 1) AT1 receptors inside and outside the kidney make equivalent contributions to normal blood pressure homeostasis, 2) activation of renal AT 1 receptors is required for the development of angiotensin II-dependent hypertension, and 3) this blood pressure elevation rather than activation of AT1 receptors in the heart drives angiotensin II-induced cardiac hypertrophy. These findings, together with previous experiments, confirm the kidney’s critical role in the pathogenesis of hypertension and its complications.

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  1. MSRB II, Room 2018, Duke University Medical Center, 106 Research Drive, Durham, NC, 27710, USA

    Steven D. Crowley

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  1. Steven D. Crowley
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  2. Thomas M. Coffman
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Correspondence to Steven D. Crowley.

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Crowley, S.D., Coffman, T.M. In hypertension, the kidney breaks your heart. Curr Cardiol Rep 10, 470–476 (2008). https://doi.org/10.1007/s11886-008-0074-5

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