L-type Ca2+ current in guinea pig ventricular myocytes treated with modulators of tyrosine phosphorylation.
L-type Ca2+ current in guinea pig ventricular myocytes treated with modulators of tyrosine phosphorylation.
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用酪氨酸磷酸化调节剂处理的豚鼠心室肌细胞中的 L 型 Ca2 电流。
DOI:
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发表时间:
1999
期刊:
影响因子:
--
通讯作者:
T. Mcdonald
中科院分区:
文献类型:
--
作者:
T. Ogura;L. Shuba;T. Mcdonald
Guinea pig ventricular myocytes in whole cell configuration were treated with tyrosine kinase (TK) inhibitors [genistein (Gst), tyrphostin A23 (T23), and tyrphostin A25 (T25)] and with inactive analogs [daidzein, genistin, and tyrphostin A1 (T1)] to measure effects on L-type Ca2+ current ( I Ca,L). Gst inhibited I Ca,L(IC50 = 47 μM) without affecting its time course or shifting the I Ca,L-voltage relationship. At the highest concentration of isoflavone tested (200 μM), I Ca,L was inhibited by 66 ± 7% (Gst), 22 ± 2% (daidzein), and 1 ± 3% (genistin). Inhibition of I Ca,L by the active tyrphostins was significantly larger than inhibition by T1; at 200 μM the inhibitions were 72 ± 6% (T23), 71 ± 6% (T25), and 27 ± 6% (T1). The phosphotyrosine phosphatase inhibitor orthovanadate (1 mM) had a small stimulatory effect (6 ± 2%) on basal I Ca,L and blocked the inhibition of I Ca,L by TK inhibitors. The data suggest a role for the TK-phosphotyrosine phosphatase system in the regulation of cardiac Ca2+ channels.
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DOI:
10.1152/ajpcell.1995.268.1.c154
发表时间:
1995
期刊:
The American journal of physiology.
影响因子:
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作者:
Bischof,G;Illek,B;Reenstra,WW;Machen,TE
通讯作者:
Machen,TE
影响因子:
5
作者:
Hisashi Yokoshiki;Kotaro Sumii;Nicholas Sperelakis
通讯作者:
Hisashi Yokoshiki;Kotaro Sumii;Nicholas Sperelakis
DOI:
10.1152/ajpheart.1998.275.1.h204
发表时间:
1998
期刊:
The American journal of physiology
影响因子:
--
作者:
Wang,YG;Lipsius,SL
通讯作者:
Lipsius,SL
影响因子:
5
作者:
Katsube,Y;Yokoshiki,H;Nguyen,L;Yamamoto,M;Sperelakis,N
通讯作者:
Sperelakis,N
DOI:
--
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Swarup,G;SpeegJr,KV;Cohen,S;Garbers,DL
通讯作者:
Garbers,DL