Specific G proteins mediate endothelin induced contraction.

Specific G proteins mediate endothelin induced contraction.
复制标题

特定的 G 蛋白介导内皮素诱导的收缩。

DOI:
10.1016/0024-3205(92)90578-d
复制
发表时间:
1992
期刊:
影响因子:
6.1
通讯作者:
Omann,GM
Omann,GM
中科院分区:
医学2区
文献类型:
--
作者:
Bitar,KN;Stein,S;Omann,GM

文献摘要

参考文献

被引文献

相似文献

内皮素是一种有效的血管收缩肽,最近已定位于胃肠道。我们研究了兔直肠乙状结肠分离平滑肌细胞中内皮素的跨膜信号传导特性。内皮素诱导平滑肌细胞在 10−10 至 10−6M 范围内发生剂量依赖性收缩。在正常缓冲液中,收缩在 30 秒时达到峰值,并持续长达 8 分钟。在0Ca/2mM EGTA中孵育消除了内皮素诱导的持续收缩,但对初始短暂收缩没有影响。用 G 蛋白抗血清预孵育皂苷处理的细胞对对照细胞长度没有影响。将皂苷处理的分离平滑肌细胞与 Goα 或 Gs 的特异性 G 蛋白抗血清(兔抗血清)预孵育 60 分钟,不会抑制内皮素诱导的收缩。用Gi3α抗血清预孵育抑制了内皮素诱导的初始短暂收缩,用Gi1−2α抗血清预孵育抑制了内皮素诱导的收缩的持续期。我们的数据表明:1)内皮素诱导直肠乙状结肠平滑细胞直接持续收缩; 2)内皮素的跨膜信号传导是通过两种特定的GTP结合成分Giα,一种用于初始短暂收缩,另一种用于收缩的持续阶段。
Endothelin is a potent vasoconstrictor peptide which has recently been localized in the gastrointestinal tract. We have investigated the transmembrane signaling properties of endothelin in isolated smooth muscle cells of the rabbit rectosigmoid. Endothelin induced a dose dependent contraction of smooth muscle cells in a range of 10−10to 10−6M. In normal buffer, contraction peaked at 30 sec and was sustained for up to 8 min. Incubation in 0Ca/2mM EGTA abolished the sustained contraction induced by endothelin, but had no effect on the initial transient contraction. Preincubation of saponin treated cells with G protein antisera had no effect on control cell length. Preincubation of saponin treated isolated smooth muscle cells with specific G protein antisera (rabbit antisera) for Goα or Gs for 60 minutes did not inhibit contraction induced by endothelin. Preincubation with an antiserum to Gi3α inhibited the initial transient contraction induced by endothelin and preincubation with an antiserum to Gi1−2α inhibited the sustained phase of the endothelin induced contraction. Our data indicate that: 1) Endothelin induces a direct sustained contraction of smooth cells from the rectosigmoid; 2) The transmembrane signalling of endothelin is through two specific GTP binding components that are Giα, one for the initial transient contraction, and the other for the sustained phase of the contraction.
一种新型血管活性肽内皮素通过瑞士 3T3 成纤维细胞中的肌醇脂质周转刺激有丝分裂发生。
DOI: --
发表时间: 1989
影响因子: 4.8
作者:
Noriko TakuwaSO;Yoh Takuwall;Masashi YanagisawaJJ;Kamejiro Yamashitall;T. Masaki
通讯作者: T. Masaki
大鼠内皮素是大鼠离体灌注肠系膜中的血管舒张剂。
DOI: --
发表时间: 1989
影响因子: 5
作者:
Timothy D. Warner;Gilberto de Nucci;J. R. Vane
通讯作者: J. R. Vane
DOI: --
发表时间: 1990
期刊: Gastroenterology
影响因子: 29.4
作者:
Kazuhiro Takahashi;P. Jones;Sandip M. Kanse;Hing;Rachel A. Spokes;M. Ghatei;S. Bloom
通讯作者: S. Bloom
内皮素/sarafotoxin 家族的三种明显受体亚型
DOI: --
发表时间: 1989
期刊: FEBS Letters
影响因子: 3.5
作者:
Y. Kloog;D. Bousso;A. Bdolah;M. Sokolovsky
通讯作者: M. Sokolovsky
Takuwa,Y.:“血管平滑肌细胞中内皮素受体通过百日咳毒素不敏感的鸟嘌呤核苷酸结合调节蛋白与磷脂酶 C 偶联”,J Clin Invest。
DOI: --
发表时间: --
期刊:
影响因子: --
作者:
通讯作者: --