Regulation of a Human Chloride Channel
Regulation of a Human Chloride Channel
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人氯通道的调节
DOI:
--
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发表时间:
2001
影响因子:
4.8
通讯作者:
S. Shears
中科院分区:
文献类型:
--
作者:
M. Ho;M. Kaetzel;D. Armstrong;S. Shears
We have studied the regulation of Ca2+-dependent chloride (ClCa) channels in a human pancreatoma epithelial cell line (CFPAC-1), which does not express functional cAMP-dependent cystic fibrosis transmembrane conductance regulator chloride channels. In cell-free patches from these cells, physiological Ca2+ concentrations activated a single class of 1-picosiemens Cl−-selective channels. The same channels were also stimulated by a purified type II calmodulin-dependent protein kinase (CaMKII), and in cell-attached patches by purinergic agonists. In whole-cell recordings, both Ca2+- and CaMKII-dependent mechanisms contributed to chloride channel stimulation by Ca2+, but the CaMKII-dependent pathway was selectively inhibited by inositol 3,4,5,6-tetrakisphosphate (Ins(3,4,5,6)P4). This inhibitory effect of Ins(3,4,5,6)P4 on ClCachannel stimulation by CaMKII was reduced by raising [Ca2+] and prevented by inhibition of protein phosphatase activity with 100 nm okadaic acid. These data provide a new context for understanding the physiological relevance of Ins(3,4,5,6)P4 in the longer term regulation of Ca2+-dependent Cl− fluxes in epithelial cells.
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影响因子:
56.9
作者:
De Koninck, P;Schulman, H
通讯作者:
Schulman, H
DOI:
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发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Fuller,CM;Ismailov,II;Keeton,DA;Benos,DJ
通讯作者:
Benos,DJ
DOI:
10.1152/ajpcell.1999.276.6.c1261
发表时间:
1999-06
期刊:
American journal of physiology. Cell physiology
影响因子:
--
作者:
A. Gruber;K. D. Schreur;H. Ji;C. Fuller;B. Pauli
通讯作者:
A. Gruber;K. D. Schreur;H. Ji;C. Fuller;B. Pauli
DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Chan,HC;Kaetzel,MA;Gotter,AL;Dedman,JR;Nelson,DJ
通讯作者:
Nelson,DJ
DOI:
10.1073/pnas.93.19.10505
发表时间:
1996-09-17
影响因子:
11.1
作者:
Ismailov, II;Fuller, CM;Barrett, KE
通讯作者:
Barrett, KE