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    J Clin Invest. 2000 Aug;106(3):R25-9.

    Evidence for angiotensin II type 2 receptor-mediated cardiac myocyte enlargement during in vivo pressure overload.

    Senbonmatsu T, Ichihara S, Price E Jr, Gaffney FA, Inagami T.

    Source

    Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0146, USA.

    Abstract

    The pathophysiological roles of the angiotensin II type 2 receptor (AT(2)) in cardiac hypertrophy remain unclear. By the targeted deletion of mouse AT(2) we were able to prevent the left ventricular hypertrophy resulting from pressure overload, while cardiac contractile functions remained normal. This implies that AT(2) is a mediator of cardiac hypertrophy in response to increased blood pressure. The effects of AT(2) deletion were independent of activation of embryonic genes for cardiac hypertrophy. However, p70(S6k), one of the key factors in cardiac hypertrophy, was markedly and specifically reduced in the ventricles of Agtr2(-)/Y mice. We propose that p70(S6k) plays a major role in AT(2)-mediated ventricular hypertrophy. This article may have been published online in advance of the print edition. The date of publication is available from the JCI website, http://www.jci.org.

    PMID:
    10930448
    [PubMed - indexed for MEDLINE]
    PMCID: PMC314331
    Free PMC Article

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