BK channels and a new form of hypertension.
BK channels and a new form of hypertension.
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DOI:
10.1038/ki.2010.272
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发表时间:
2010-11
影响因子:
19.6
通讯作者:
Sansom, Steven C.
中科院分区:
文献类型:
--
作者:
Grimm, P. Richard;Sansom, Steven C.
Large, Ca-activated K channels (BK) are comprised of an alpha pore (BKα) and one of four beta subunits (BKβ1-4). When the gene for BKβ1 is knocked out (BKβ1-KO) the result is increased myogenic tone of vascular smooth muscle and hypertension. We re-examined whether the hypertension is entirely due to increased vascular tone because most monogenic forms of hypertension have renal origins and BKβ1 resides in renal connecting tubule (CNT) cells. Moreover, BKβ1 is localized in the adrenal glands where it may control production of aldosterone. This review will summarize our report that a majority of the hypertension of BKβ1-KO is the result of insufficient handling of dietary K, resulting in increased plasma K and hyperaldosteronism, the latter promoting Na and fluid retention. The fluid retention and hypertension are exacerbated by a high K diet and reduced by eplerenone, an aldosterone receptor inhibitor. Genetic knock out of the BKβ4 (BKβ4-KO), which resides in intercalated cells, also exhibit deficient K excretion, fluid retention and mild hypertension that is not exacerbated when animals are treated a high K diet. These results show that the hypertension associated with BKβ1-KO occurs because of enhanced fluid retention as well as the previously described vascular dysfunction.
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DOI:
10.1073/pnas.0904635106
发表时间:
2009-07-14
影响因子:
11.1
作者:
Grimm, P. Richard;Irsik, Debra L.;Sansom, Steven. C.
通讯作者:
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影响因子:
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作者:
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影响因子:
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作者:
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通讯作者:
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DOI:
10.1152/ajprenal.00018.2007
发表时间:
2007-07-01
影响因子:
4.2
作者:
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通讯作者:
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影响因子:
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作者:
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通讯作者:
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