Issue Archive

EFFECTS OF GASTRIC MUCOSAL BLOOD FLOW (GMBF) ON THE ROLE OF ADAPTIVE CYTOPROTECTION OF RAT GASTRIC MUCOSA

YAN CHANG-DONG, GU LUO, TIAN SU-PING, CHEN QI-SHENG, DAI YI-LONG , LI DONG-SHENG

(Department of Physiology, Nan)ing Medical University，Nanjing 210029)

Abstract

By the use of hydrogen gas clearance technique，we have investigated the role of GMBF in the adaptive cytoprotection induced by intragastric perfusion with low concentration prior to high concentration of HCl plus ethanol. The results were as follows:(1)intragastric perfusion with low concentration prior to high concentration of HCl plus ethanol led to an adaptive cytoprotection，i. e.，the gross and the deep damage were decreased by 47. 09%and 44.57%respectively，as compared with those caused by high concentration of HCl plus ethanol alone;correspondingly，GMBF also showed an adaptive hyperemic response，i. e.，GMBF was increased by 28. 02%as compared with that due to high concentration alone;(2)close arterial infusion of vasopressin
blocked the adaptive hyperemic response and abolished the adaptive cytoprotection;(3)intravenous indomethacin reduced the basal GMBF，and abolished both the adaptive hy}peremic response and ytoprotection;furthermore，the gross and deep damage were aggravated compared with that caused by high concentration alone. The results showed that the adaptive hyperemic response of gastric mucosa was involved in the adaptive cytoprotection and suggested that the adaptive cytoprotection of endogenous prostaglandin might be partially related to the increase of GMBF.

Key words: gastric mucosal blood flow;adaptive cytoprotection;gastric lesions;vasopressin; indomethacin;hydrogen gas clearance

Received: 　　Accepted:

Corresponding author: 　　E-mail:

Citing This Article：

YAN CHANG-DONG, GU LUO, TIAN SU-PING, CHEN QI-SHENG, DAI YI-LONG , LI DONG-SHENG. EFFECTS OF GASTRIC MUCOSAL BLOOD FLOW (GMBF) ON THE ROLE OF ADAPTIVE CYTOPROTECTION OF RAT GASTRIC MUCOSA . Acta Physiol Sin 1996; 48 (5): (in Chinese with English abstract).