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丹曲林可阻断钾离子在回肠纵行平滑肌中引发的强直性收缩和钙内流。

Dantrolene blocks the tonic contraction and calcium influx evoked by K+ in ileal longitudinal smooth muscle.

作者信息

Nasu T, Oosako H, Shibata H

机构信息

Department of Veterinary Pharmacology, Faculty of Agriculture, Yamaguchi University, Japan.

出版信息

Gen Pharmacol. 1996 Apr;27(3):513-7. doi: 10.1016/0306-3623(95)00102-6.

DOI:10.1016/0306-3623(95)00102-6
PMID:8723536
Abstract
  1. Dantrolene (10(-5)-10(-4) M) reduced the K+ (60 mM) tonic response in accordance with decreased Ca2+ uptake, as determined by La method, more than the phasic in ileal muscle. 2. After saponin-treatment of the fibers, which leaves the Ca2+ storage sites intact, dantrolene had only a slight effect on the caffeine-induced contraction. In Triton-X-100-treated fibers, in which the Ca2+ release sites are destroyed, dantrolene did not affect the Ca(2+)-induced contraction. 3. The results suggest that dantrolene inhibited the high-K(+)-induced tonic response mainly by inhibiting Ca2+ influx via voltage-dependent Ca2+ channels in ileum without affecting contractile elements. In contrast, dantrolene had only a slight effect on the intracellular Ca2+ release from caffeine-sensitive release sites.
摘要
  1. 丹曲林(10⁻⁵ - 10⁻⁴ M)可降低K⁺(60 mM)引起的强直性反应,根据镧法测定,其与Ca²⁺摄取减少相关,在回肠肌肉中对强直性反应的降低作用大于对相位性反应的降低作用。2. 在用皂苷处理纤维后,Ca²⁺储存位点保持完整,丹曲林对咖啡因诱导的收缩只有轻微影响。在用Triton-X-100处理的纤维中,Ca²⁺释放位点被破坏,丹曲林不影响Ca²⁺诱导的收缩。3. 结果表明,丹曲林主要通过抑制回肠中电压依赖性Ca²⁺通道的Ca²⁺内流来抑制高K⁺诱导的强直性反应,而不影响收缩成分。相比之下,丹曲林对咖啡因敏感释放位点的细胞内Ca²⁺释放只有轻微影响。

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1
Dantrolene blocks the tonic contraction and calcium influx evoked by K+ in ileal longitudinal smooth muscle.丹曲林可阻断钾离子在回肠纵行平滑肌中引发的强直性收缩和钙内流。
Gen Pharmacol. 1996 Apr;27(3):513-7. doi: 10.1016/0306-3623(95)00102-6.
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Dantrolene blocks the tonic contractions to carbachol and histamine with smaller effects on the phasic due to release of intracellular Ca2+ in ileal longitudinal muscle.
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The effect of L-type calcium channel modulators on the mobilization of intracellular calcium stores in guinea-pig intestinal smooth muscle.L型钙通道调节剂对豚鼠肠道平滑肌细胞内钙库动员的影响。
Br J Pharmacol. 1996 Sep;119(1):142-8. doi: 10.1111/j.1476-5381.1996.tb15687.x.
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Effects of hydralazine on responses to histamine and caffeine in ileal longitudinal muscle and taenia coli of the guinea pig.肼屈嗪对豚鼠回肠纵肌和结肠带中组胺和咖啡因反应的影响。
Gen Pharmacol. 1997 Mar;28(3):421-5. doi: 10.1016/s0306-3623(96)00244-3.
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Inhibition of calcium influx and tonic response to K+ of intestinal smooth muscle by hydralazine.
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Cyclopiazonic acid, an inhibitor of Ca(2+)-ATPase in sarcoplasmic reticulum, increases excitability in ileal smooth muscle.环匹阿尼酸是肌浆网中Ca(2+) -ATP酶的抑制剂,可增加回肠平滑肌的兴奋性。
Br J Pharmacol. 1993 Oct;110(2):565-72. doi: 10.1111/j.1476-5381.1993.tb13848.x.
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Discrimination by nimodipine, but not by nifedipine, between phasic and tonic contractions of guinea-pig taenia coli induced by K+ depolarization.尼莫地平而非硝苯地平可区分钾离子去极化诱导的豚鼠结肠带的相性收缩和张力性收缩。
Can J Physiol Pharmacol. 1995 Nov;73(11):1600-4. doi: 10.1139/y95-721.
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Effects of cyclopiazonic acid, a novel Ca(2+)-ATPase inhibitor, on contractile responses in skinned ileal smooth muscle.新型Ca(2+) -ATP酶抑制剂环匹阿尼酸对分离的回肠平滑肌收缩反应的影响
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Zinc ions block the intracellular calcium release induced by caffeine in guinea-pig taenia caeci.锌离子可阻断咖啡因诱导的豚鼠盲肠带的细胞内钙释放。
Experientia. 1995 Feb 15;51(2):113-6. doi: 10.1007/BF01929351.
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Dependency of histamine induced phasic and tonic contractions on intracellular and extracellular calcium in guinea pig tracheal smooth muscle.组胺诱导的豚鼠气管平滑肌相性和紧张性收缩对细胞内和细胞外钙的依赖性。
Jpn J Pharmacol. 1989 Jun;50(2):125-30. doi: 10.1254/jjp.50.125.

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