Hypotonicity-induced TRPV4 function in renal collecting duct cells: modulation by progressive cross-talk with Ca2+-activated K+ channels.
Hypotonicity-induced TRPV4 function in renal collecting duct cells: modulation by progressive cross-talk with Ca2+-activated K+ channels.
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DOI:
10.1016/j.ceca.2011.11.011
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发表时间:
2012-02
期刊:
影响因子:
4
通讯作者:
O'Neil RG
中科院分区:
文献类型:
--
作者:
Jin M;Berrout J;Chen L;O'Neil RG
The mouse cortical collecting duct (CCD) M-1 cells were grown to confluency on coverslips to assess the interaction between TRPV4 and Ca2+-activated K+ channels. Immunocytochemistry demonstrated strong expression of TRPV4, along with the CCD marker, aquaporin-2, and the Ca2+-activated K+ channels, the small conductance SK3 (KCa2.3) channel and large conductance BKα channel (KCa1.1). TRPV4 overexpression studies demonstrated little physical dependency of the K+ channels on TRPV4. However, activation of TRPV4 by hypotonic swelling (or GSK1016790A, a selective agonist) or inhibition by the selective antagonist, HC-067047, demonstrated a strong dependency of SK3 and BK-α activation on TRPV4-mediated Ca2+ influx. Selective inhibition of BK-α channel (Iberiotoxin) or SK3 channel (apamin), thereby depolarizing the cells, further revealed a significant dependency of TRPV4-mediated Ca2+ influx on activation of both K+ channels. It is concluded that a synergistic cross-talk exists between the TRPV4 channel and SK3 and BK-α channels to provide a tight functional regulation between the channel groups. This cross-talk may be progressive in nature where the initial TRPV4-mediated Ca2+ influx would first activate the highly Ca2+-sensitive SK3 channel which, in turn, would lead to enhanced Ca2+ influx and activation of the less Ca2+-sensitive BK channel.
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影响因子:
3.7
作者:
Jin M;Wu Z;Chen L;Jaimes J;Collins D;Walters ET;O'Neil RG
通讯作者:
O'Neil RG
影响因子:
5.2
作者:
Guilak F;Leddy HA;Liedtke W
通讯作者:
Liedtke W
DOI:
10.1073/pnas.1005333107
发表时间:
2010-11-02
影响因子:
11.1
作者:
Everaerts, Wouter;Zhen, Xiaoguang;Voets, Thomas
通讯作者:
Voets, Thomas
DOI:
10.1152/ajprenal.00057.2007
发表时间:
2007-07-01
影响因子:
4.2
作者:
Liu, Wen;Morimoto, Tetsuji;Satlin, Lisa M.
通讯作者:
Satlin, Lisa M.
影响因子:
13.6
作者:
Holtzclaw, J. David;Grimm, P. Richard;Sansom, Steven C.
通讯作者:
Sansom, Steven C.