K+ channel mutations in adrenal aldosterone-producing adenomas and hereditary hypertension.

K+ channel mutations in adrenal aldosterone-producing adenomas and hereditary hypertension.
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DOI:
10.1126/science.1198785
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发表时间:
2011-02-11
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Lifton RP
Lifton RP
中科院分区:
其他
文献类型:
--
作者:
Choi M;Scholl UI;Yue P;Björklund P;Zhao B;Nelson-Williams C;Ji W;Cho Y;Patel A;Men CJ;Lolis E;Wisgerhof MV;Geller DS;Mane S;Hellman P;Westin G;Åkerström G;Wang W;Carling T;Lifton RP

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内分泌肿瘤如产生醛固酮的肾上腺腺瘤(APA)是严重高血压的一个原因,其特征是组成性激素产生和无限制的细胞增殖;这些事件的机制尚不清楚。我们确定了两个经常性的体细胞突变和附近的钾(K+)通道KCNJ 5的选择性过滤器,存在于8的22人APA研究。两者都产生增加的钠(Na+)电导和细胞去极化,这在肾上腺肾小球细胞中产生钙(Ca 2+)内流,这是醛固酮产生和细胞增殖的信号。同样,我们确定了一种遗传性KCNJ 5突变,该突变在严重醛固酮增多症和大量双侧肾上腺增生的孟德尔形式中产生增加的Na+电导。这些发现解释了一部分严重高血压患者的发病机制,并暗示了组成性细胞增殖和激素产生中K+通道选择性的丧失。
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 (Ca2+) entry, the signal for aldosterone production and cell proliferation. Similarly, we identify an inherited KCNJ5 mutation that produces increased Na+ conductance in a Mendelian form of severe aldosteronism and massive bilateral adrenal hyperplasia. These findings explain pathogenesis in a subset of patients with severe hypertension and implicate loss of K+ channel selectivity in constitutive cell proliferation and hormone production.
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