Rapid cooling-induced contractures in rat skinned skeletal muscle fibres originate from sarcoplasmic reticulum Ca2+ release through ryanodine and inositol trisphosphate receptors

Rapid cooling-induced contractures in rat skinned skeletal muscle fibres originate from sarcoplasmic reticulum Ca2+ release through ryanodine and inositol trisphosphate receptors
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快速冷却引起的大鼠皮肤骨骼肌纤维挛缩源于肌浆网 Ca2 通过兰尼碱和肌醇三磷酸受体释放

DOI:
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发表时间:
2000
期刊:
Pflügers Archiv
影响因子:
--
通讯作者:
C. Léoty
C. Léoty
中科院分区:
--
文献类型:
--
作者:
S. Talon;C. Huchet;C. Léoty

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抽象的。以前的报道表明,冷却横纹肌可以引起与肌浆网钙释放有关的收缩反应。然而,降温的效果通常是在药物存在的情况下进行研究的,这些药物可以加强快速降温引起的收缩。本研究表明,在皂素皮肤的大鼠骨骼肌制剂中,温度从22°C降至2°C本身会导致痉挛,然后在回到22°C时松弛。在快速收缩纤维中,快速冷却引起的痉挛可被兰诺定受体的抑制剂兰诺定完全阻断。相比之下,在慢收缩纤维中,兰诺定部分抑制了快速降温诱导的收缩反应,留下了在应用三磷酸肌醇(InsP3)后消散的残余张力。在低浓度下,InsP3受体的抑制剂肝素可以减少这两种类型肌肉因快速降温而引起的收缩。目前的结果表明,在骨骼肌中,快速降温引起的肌挛缩是由于肌浆网对兰尼定和InsP3敏感的钙离子释放所致。
Abstract. Previous reports have shown that cooling striated muscles induces contractile responses that are related to Ca2+ release from the sarcoplasmic reticulum. However, the effect of cooling has generally been studied in the presence of pharmacological agents that potentiate rapid cooling-induced contractures. The present study shows that in saponin-skinned rat skeletal muscle preparations, a drop in temperature from 22°C to 2°C per se induces a contracture which relaxes on return to 22°C. In fast-twitch fibres, rapid cooling-induced contractures are fully blocked by ryanodine, an inhibitor of ryanodine receptors. By contrast, in slow-twitch fibres, ryanodine partially inhibits the rapid cooling-induced contractile response, leaving a residual tension that dissipates after application of inositol 1,4,5-trisphosphate (InsP3). At low concentrations, heparin, an inhibitor of InsP3 receptors, decreases rapid cooling-induced contractures in both types of muscle. The present results suggest that in skeletal muscle, rapid cooling-induced contractures are due to both ryanodine-sensitive and InsP3-sensitive Ca2+ release from the sarcoplasmic reticulum.
DOI: --
发表时间: 1986-05
期刊: The Journal of biological chemistry
影响因子: --
作者:
G. Meissner
通讯作者: G. Meissner
DOI: 10.1073/pnas.82.15.5231
发表时间: 1985-08
影响因子: 11.1
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A. Somlyo;M. Bond;A. Somlyo;A. Scarpa
通讯作者: A. Somlyo;M. Bond;A. Somlyo;A. Scarpa
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
DOI: 10.1006/dbio.1998.9120
发表时间: 1999-02-15
影响因子: 2.7
作者:
Rosemblit, N;Moschella, MC;Marks, AR
通讯作者: Marks, AR
肝素抑制血管平滑肌中鸟嘌呤核苷酸诱导的肌醇 1,4,5-三磷酸依赖性钙释放,但不抑制独立钙释放。
DOI: 10.1016/s0006-291x(88)81141-0
发表时间: 1988
影响因子: 3.1
作者:
Kobayashi,S;Somlyo,AV;Somlyo,AP
通讯作者: Somlyo,AP