GALANIN INDUCES CONTRACTION OF ISOLATED CELLS FROM CIRCULAR MUSCLE LAYER OF PIG ILEUM

被引：18

作者：

DELVAUX, M ^{[1
]}

BOTELLA, A ^{[1
]}

FIORAMONTI, J ^{[1
]}

FREXINOS, J ^{[1
]}

BUENO, L ^{[1
]}

机构：

[1] CHU RANGUEIL,DIGEST MOTIL LAB,F-31054 TOULOUSE,FRANCE

来源：

REGULATORY PEPTIDES | 1991年 / 32卷 / 03期

关键词：

GALANIN; SMOOTH MUSCLE CELL; CELL CONTRACTION; PIG ILEUM;

D O I：

10.1016/0167-0115(91)90030-K

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

The effects of galanin and its interaction with cholecystokinin and acetylcholine on smooth muscle cells were studied in vitro on isolated cells obtained from pig ileum circular muscle layer. Galanin induced a concentration-dependent cell contraction with a maximal contraction (24.5% decrease in cell length from control) obtained at 1 nM. The concentration of galanin inducing a half-maximal contraction was 3 pM. Tetrodotoxin (10-mu-M) failed to inhibit cell contraction induced by galanin (1 nM), pentagastrin (10 nM) and acetylcholine (1-mu-M). Atropine abolished the contraction induced by acetylcholine (1-mu-M), but had no effect on galanin- and pentagastrin-induced contraction. L 364,718 inhibited the contraction induced by CCK8 but not the galanin-induced contraction. At the uneffective concentration of 10 fM, galanin had a synergistic effect with an uneffective concentration of CCK8 (1 pM). These results suggest that (i) galanin contracts smooth muscle cells from pig ileum by acting on a specific receptor; (ii) galanin and either CCK or acetylcholine may act in a synergistic way to induce cell contraction.

引用

页码：369 / 374

页数：6

共 18 条

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