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Angiotensin II stimulates both aldosterone secretion and DNA synthesis via type 1 but not type 2 receptors in bovine adrenocortical cells

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Abstract

Angiotensin II (Ang II) type 2 receptor (AT2) has been shown to counteract the type 1 receptor (AT1)-mediated biological actions of Ang II in the cardiovascular system. The biological significance of AT2 receptor in the adrenals however remains unknown. In the present study, we investigated the roles of ATI and AT2 receptor subtypes in the regulation of aldosterone secretion and DNA synthesis in bovine adrenocortical zona glomerulosa cells in vitro. Ang II (1 µmol/l)-stimulated aldosterone secretion was completely suppressed by AT1 antagonist CV-11974 but not affected by AT2 receptor antagonist PD-123319. Effects on DNA synthesis were investigated by determining the incorporation of BrdU into the nuclei of the cultured zona glomerulosa cells. Ang II (1 µmol/l)-stimulated DNA synthesis of the cells was also completely suppressed by CV-11974 but not by PD-123319. These results suggest that AT1 receptor but not AT2 receptor is the predominant receptor subtype which mediates the Ang II-stimulated aldosterone secretion and cell growth in bovine adrenocortical cells.

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Authors and Affiliations

  1. Department of Medicine, Tokyo Women’s Medical University, Tokyo, Japan

    Akiyo Tanabe MD, M. Naruse, K. Arai, K. Naruse, T. Yoshimoto, T. Seki, T. Imaki & H. Demura

  2. Department of Pathology, Tokyo Women’s Medical University, Tokyo, Japan

    M. Kobayashi

  3. Institute of Applied Biochemistry, Gene Experiment Center, University of Tsukuba, Ibaraki, Japan

    H. Miyazaki

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  1. Akiyo Tanabe MD
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  2. M. Naruse
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Tanabe, A., Naruse, M., Arai, K. et al. Angiotensin II stimulates both aldosterone secretion and DNA synthesis via type 1 but not type 2 receptors in bovine adrenocortical cells. J Endocrinol Invest 21, 668–672 (1998). https://doi.org/10.1007/BF03350796

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  • DOI: https://doi.org/10.1007/BF03350796

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