Ouabain modulation of endothelial calcium signaling in descending vasa recta.
Ouabain modulation of endothelial calcium signaling in descending vasa recta.
复制标题
哇巴因对直肠降血管内皮钙信号传导的调节。
DOI:
10.1152/ajprenal.00326.2005
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发表时间:
2006
期刊:
影响因子:
--
通讯作者:
Pallone,ThomasL
中科院分区:
文献类型:
--
作者:
Pittner,Janos;Rhinehart,Kristie;Pallone,ThomasL
Using fura 2-loaded vessels, we tested whether ouabain modulates endothelial cytoplasmic calcium concentration ([Ca2+]CYT) in rat descending vasa recta (DVR). Over a broad range between 10−10and 10−4M, ouabain elicited biphasic peak and plateau [Ca2+]CYTelevations. Blockade of voltage-gated Ca2+entry with nifedipine did not affect the response to ouabain mitigating against a role for myo-endothelial gap junctions. Reduction of extracellular Na+concentration ([Na+]o) or Na+/Ca2+exchanger (NCX) inhibition with SEA-0400 (10−6M) elevated [Ca2+]CYT, supporting a role for NCX in the setting of basal [Ca2+]CYT. SEA-0400 abolished the [Ca2+]CYTresponse to ouabain implicating NCX as a mediator. The transient peak phase of [Ca2+]CYTelevation that followed either ouabain or reduction of [Na+]owas abolished by 2-aminoethoxydiphenyl borate (5 × 10−5M). Cation channel blockade with La3+(10 μM) or SKF-96365 (10 μM) also attenuated the ouabain-induced [Ca2+]CYTresponse. Ouabain pretreatment increased the [Ca2+]CYTelevation elicited by bradykinin (10−7M). We conclude that inhibition of ouabain-sensitive Na+-K+-ATPase enhances DVR endothelial Ca2+store loading and modulates [Ca2+]CYTsignaling through mechanisms that involve NCX, Ca2+release, and cation channel activation.
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影响因子:
12.3
作者:
Blaustein, MP;Juhaszova, M;Golovina, VA
通讯作者:
Golovina, VA
影响因子:
9.3
作者:
J. Hamlyn
通讯作者:
J. Hamlyn
影响因子:
3.3
作者:
Zhaokan Yuan;T. Cai;Jiang Tian;A. Ivanov;D. Giovannucci;Zijian Xie
通讯作者:
Zhaokan Yuan;T. Cai;Jiang Tian;A. Ivanov;D. Giovannucci;Zijian Xie
影响因子:
3.9
作者:
A. Mobasheri;R. Errington;S. Golding;A. Hall;J. Urban
通讯作者:
J. Urban
DOI:
10.1073/pnas.94.5.1800
发表时间:
1997-03-04
影响因子:
11.1
作者:
Juhaszova, M;Blaustein, MP
通讯作者:
Blaustein, MP