延胡索乙素对离体大鼠胃酸分泌的抑制作用

Inhibitory action of dl-tetrahydropalmatine on gastric acid secretion in vitro

探讨延胡素乙素(dl—THP)对离体大鼠胃粘膜和胃壁细胞泌酸功能的影响.结果:dl—THP明显抑制胃粘膜基础胃酸分泌.但洗脱药物1.5～2h后其作用即显著减弱.对于组胺(His)诱导的胃粘膜及壁细胞泌酸、dl—THP均使His的量效曲线非平行右移.并抑制最大泌酸反应;pD_z^1值分别是4.72和4.70。

The action of dl - tetrahydropal-matine(dl-THP) was studied in two preparations in vitro : the isolated rat gastric mucosa and parietal cells, dl-THP was found to inhibit significantly basal acid formation by the gastric mucosa in a dose - response fashion. The effect was reversible, acid secretion returning to control levels 1. 5~2h after the preparation underwent a double wash, dl - THP also produced a significant and dose - dependent inhibition of histamine - induced secretion in the gastric mucosa and parietal cells, shifted the histamine dose -response cuver to the right and suppressed the maximum acid production, with pD_2~1 values of 4. 72 and 4. 70, respectively.