Effect of inhibition of tyrosine phosphatases on voltage‐operated calcium channel currents in rabbit isolated ear artery cells
Effect of inhibition of tyrosine phosphatases on voltage‐operated calcium channel currents in rabbit isolated ear artery cells
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酪氨酸磷酸酶抑制对兔离体耳动脉细胞电压驱动钙通道电流的影响
DOI:
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发表时间:
1998
影响因子:
7.3
通讯作者:
A. Hughes
中科院分区:
文献类型:
--
作者:
S. Wijetunge;J. Lymn;A. Hughes
The effect of increasing cellular tyrosine phosphorylation by inhibiting endogenous tyrosine phosphatases was examined on voltage‐operated calcium channel currents in vascular smooth muscle cells. In single ear artery smooth muscle cells of the rabbit, studied by the whole cell voltage clamp technique, intracellular application of the tyrosine phosphatase inhibitors, sodium orthovanadate (100 μM) and peroxyvanadate (100 μM orthovanadate+1 mM H2O2) increased voltage‐operated calcium channel currents by 56% and 83%, respectively. Bath application of two other membrane permeant tyrosine phosphatase inhibitors, phenylarsine oxide (100 μM) and dephostatin (50 μM) also increased voltage‐operated calcium channel currents by 48% and 52%, respectively. The selective tyrosine kinase inhibitor, tyrphostin‐23 (100 μM) reduced calcium channel currents by 41%. Pre‐incubation with tyrphostin‐23 abolished the effects of peroxyvanadate, phenylarsine oxide and dephostatin on calcium channels. Western blot analysis of rabbit ear artery cell lysates showed increased tyrosine phosphorylation of several endogenous proteins following treatment with peroxyvanadate. These results indicate that a number of structurally dissimilar inhibitors of tyrosine phosphatases increase voltage‐operated calcium channel currents in arterial smooth muscle cells presumably due to increased tyrosine phosphorylation.
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DOI:
10.1016/0020-711x(93)90486-x
发表时间:
1993
期刊:
The International journal of biochemistry
影响因子:
--
作者:
Liu,J;Fekete,Z;Slomiany,A;Slomiany,BL
通讯作者:
Slomiany,BL
DOI:
10.1152/ajpcell.1993.265.5.c1239
发表时间:
1993-11
期刊:
The American journal of physiology
影响因子:
--
作者:
Z. Wang;M. Estacion;L. Mordan
通讯作者:
Z. Wang;M. Estacion;L. Mordan
影响因子:
5
作者:
Hisashi Yokoshiki;Kotaro Sumii;Nicholas Sperelakis
通讯作者:
Hisashi Yokoshiki;Kotaro Sumii;Nicholas Sperelakis
影响因子:
3.6
作者:
Selinfreund,RH;Blair,LA
通讯作者:
Blair,LA
DOI:
10.1016/s0021-9258(18)68703-4
发表时间:
1988-05
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
N. Tonks;C. D. Diltz;E. Fischer
通讯作者:
N. Tonks;C. D. Diltz;E. Fischer