Gastric acid secretion after depletion of enterochromaffin-like cell histamine. A study with a-fluoromethylhistidine in rats

Gastric acid secretion after depletion of enterochromaffin-like cell histamine. A study with a-fluoromethylhistidine in rats
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肠嗜铬样细胞组胺耗尽后胃酸分泌。

DOI:
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发表时间:
1996
期刊:
影响因子:
--
通讯作者:
R. Håkanson
R. Håkanson
中科院分区:
--
文献类型:
--
作者:
K. Andersson;J. Cabero;H. Mattsson;R. Håkanson

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背景:组胺被认为在胃酸分泌的调节中起核心作用。在大鼠泌酸粘膜中,大部分组胺合成并储存在肠嗜铬样(ECL)细胞中,其余的存在于肥大细胞中。本研究探讨ECL细胞组胺在控制酸分泌的作用在完整的,清醒的大鼠。方法:大鼠给予α-氟甲基组胺酸(α-FMH)抑制组胺合成。α-FMH通过连续皮下输注(3 mg/kg/h)给药长达9天。在每次酸分泌试验前2 h给予额外口服剂量的α-FMH(50 mg/kg)。在幽门结扎大鼠和慢性胃瘘大鼠中研究了α-FMH输注2-6天后用组胺、胃泌素-17或胰岛素刺激的酸分泌。结果:α-FMH可使胃泌酸粘膜组胺合成减少80%。根据先前的观察结果,认为这反映了ECL细胞中组胺的消耗。剩下的20%都是在Mu...
Background: Histamine is thought to play a central role in the regulation of gastric acid secretion. In the rat oxyntic mucosa most of the histamine is synthesized and stored in enterochromaffin-like (ECL) cells, and the rest resides in mast cells. The present study examines the role of ECL-cell histamine in the control of acid secretion in the intact, conscious rat. Methods: Rats were treated with α-fluoromethylhistidine (α-FMH) to inhibit histamine synthesis. α-FMH was given by continuous subcutaneous infusion (3 mg/kg/h) for up to 9 days. An additional oral dose of α-FMH (50 mg/kg) was given 2 h before each acid secretion test. Acid secretion was studied in pylorus-ligated rats and in chronic gastric fistula rats stimulated with histamine, gastrin-17, or insulin after 2–6 days of α-FMH infusion. Results: Treatment with α-FMH lowered oxyntic mucosal histamine synthesis by 80%. From previous observations this is thought to reflect depletion of histamine from the ECL cells. The remaining 20% resides in mu...
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