Inositol trisphosphate enhances calcium release in skinned cardiac and skeletal muscle.
Inositol trisphosphate enhances calcium release in skinned cardiac and skeletal muscle.
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肌醇三磷酸可增强带皮心肌和骨骼肌中钙的释放。
DOI:
10.1152/ajpcell.1986.250.5.c807
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发表时间:
1986
期刊:
影响因子:
--
通讯作者:
Godt,RE
中科院分区:
文献类型:
--
作者:
Nosek,TM;Williams,MF;Zeigler,ST;Godt,RE
Experiments from other laboratories suggest that inositol trisphosphate (InsP3) may be involved in the excitation-contraction coupling (ECC) process of cardiac and skeletal muscle. Our results support this hypothesis. Studying fiber bundles (less than 200-microns diameter) from guinea pig papillary muscles skinned with saponin and mechanically skinned single fibers from frog semitendinosus muscle, we find that calcium-induced force oscillations (observed in solutions containing low ethyleneglycol-bis(beta-aminoethylether)-N,N'-tetraacetic acid and pCa 7.0) are enhanced in magnitude and frequency by InsP3 at concentrations as low as 1 microM. InsP3 at 10 microM can often induce such oscillations in mechanically skinned frog skeletal muscle. In skinned cardiac fibers, InsP3 increases the magnitude of caffeine contractures at submaximal caffeine concentrations to a greater extent than at near-maximal caffeine concentrations. InsP3 (30 microM) has no effect on either the calcium sensitivity or maximal force generated by the contractile apparatus of skinned cardiac muscle. We conclude that InsP3 has no direct effect on the contractile machinery but that it can modulate ECC by enhancing the calcium-induced release of calcium from the sarcoplasmic reticulum, possibly from the same pool and through the same mechanism as caffeine.
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影响因子:
33.6
作者:
H. Rasmussen;P. Barrett
通讯作者:
P. Barrett
DOI:
10.1016/0006-291x(85)91048-4
发表时间:
1985
影响因子:
3.1
作者:
N. Scherer;J. Ferguson
通讯作者:
J. Ferguson
DOI:
--
发表时间:
1982
期刊:
Journal of Biochemistry (Tokyo)
影响因子:
--
作者:
N. Yamamoto;M. Kasai
通讯作者:
M. Kasai
DOI:
--
发表时间:
1985
期刊:
Biochemical and Biophysical Research Communications - BBRC
影响因子:
--
作者:
S. Adunyah;W. Dean
通讯作者:
W. Dean
DOI:
--
发表时间:
1983
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Kim,DH;Ohnishi,ST;Ikemoto,N
通讯作者:
Ikemoto,N