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Aldosterone news

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By Elizabeth Cordova I am a Peruvian MD pursuing the USMLE steps
Murim Choi, Ute I Scholl, Peng Yue, Peyman Björklund, Bixiao Zhao, Carol Nelson-Williams, Weizhen Ji, Yoonsang Cho, Aniruddh Patel, Clara J Men, Elias Lolis, Max V Wisgerhof, David S Geller, Shrikant Mane, Per Hellman, Gunnar Westin, Göran Åkerström, Wenhui Wang, Tobias Carling, Richard P Lifton
Endocrine tumors such as aldosterone-producing adrenal adenomas (APAs), a cause of severe hypertension, feature constitutive hormone production and unrestrained cell proliferation; the mechanisms linking these events are unknown. We identify two recurrent somatic mutations in and near the selectivity filter of the potassium (K(+)) channel KCNJ5 that are present in 8 of 22 human APAs studied. Both produce increased sodium (Na(+)) conductance and cell depolarization, which in adrenal glomerulosa cells produces calcium (Ca(2+)) entry, the signal for aldosterone production and cell proliferation...
February 11, 2011: Science
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