A23187-induced changes in colonic K and Cl transport are mediated by separate mechanisms.

A23187-induced changes in colonic K and Cl transport are mediated by separate mechanisms.
复制标题

A23187 诱导的结肠 K 和 Cl 转运变化是由不同的机制介导的。

DOI:
10.1152/ajpgi.1984.247.6.g695
复制
发表时间:
1984
期刊:
The American journal of physiology
影响因子:
--
通讯作者:
McCabe,RD
McCabe,RD
中科院分区:
--
文献类型:
--
作者:
Smith,PL;McCabe,RD

文献摘要

参考文献

被引文献

相似文献

体外剥离的兔结肠黏膜在Ussing小室中进行研究,以确定1)二价阳离子载体A23187对钾和氯通量和电学性质的影响;2)前列腺素(PG)合成抑制剂吲哚美辛对A23187-、PGE1-和花生四烯酸引起的电参数和钾、氯通量的影响;以及3)A23187、花生四烯酸、吲哚美辛或吲哚美辛以及A23187或花生四烯酸对前列腺素E_2释放的影响。这些研究的结果表明,A23187、PGE1和花生四烯酸增加了钾和氯的净分泌。吲哚美辛的结果表明,该药可阻断A23187或花生四烯酸刺激的氯分泌增加,但不能抑制前列腺素E_1的作用。吲哚美辛也可抑制花生四烯酸刺激的净K分泌,但不能抑制A23187或PGE1的刺激。这些结果以及A23187类似花生四烯酸在没有消炎痛的情况下增加PGE2释放的发现表明,A23187刺激的氯的分泌是通过PG依赖的机制发生的,而A23187诱导的钾的分泌是通过另一种钙依赖的机制发生的。
Stripped rabbit colonic mucosa was studied in vitro in Ussing chambers to determine 1) effects of the divalent cation ionophore A23187 on K and Cl fluxes and electrical properties; 2) effects of the prostaglandin (PG) synthesis inhibitor indomethacin on A23187-, PGE1-, and arachidonic acid-induced changes in electrical parameters and K and Cl fluxes; and 3) changes in PGE2 release in response to A23187, arachidonic acid, indomethacin, or indomethacin and either A23187 or arachidonic acid. Results from these studies demonstrate that A23187, PGE1, and arachidonate increase net K and Cl secretion. Results with indomethacin reveal that this agent abolishes the increase in Cl secretion stimulated by A23187 or arachidonate but not by PGE1. Indomethacin also abolished net K secretion stimulated by arachidonate but not by A23187 or PGE1. These results together with the finding that A23187 like arachidonate increases PGE2 release in the absence but not the presence of indomethacin suggest that A23187-stimulated Cl secretion occurs by a PG-dependent mechanism, while A23187-induced K secretion occurs by an alternate Ca-dependent mechanism.
DOI: --
发表时间: 1980
影响因子: 14.9
作者:
R. Simpson;H. Shindo
通讯作者: H. Shindo
DOI: 10.1126/science.3103215
发表时间: 1987-03-06
期刊: SCIENCE
影响因子: 56.9
作者:
TOMASZ, M;LIPMAN, R;NAKANISHI, K
通讯作者: NAKANISHI, K
DOI: 10.1021/ja00275a065
发表时间: 1986
影响因子: 15
作者:
S. Danishefsky;M. Egbertson
通讯作者: M. Egbertson
DOI: 10.1093/nar/9.2.277
发表时间: 1981-01-01
影响因子: 14.9
作者:
SCHMITZ, A
通讯作者: SCHMITZ, A
cAMP 受体蛋白与 lac 启动子的相互作用。
DOI: --
发表时间: 1980
影响因子: 14.9
作者:
R. B. Simpson
通讯作者: R. B. Simpson