Role of gastrin-peptides in Barrett's and colorectal carcinogenesis

查看全文 作　　者：Eduardo [1]Chueca;Angel [1,2,3,4]Lanas;Elena [1,2,3]Piazuelo

机构地区：[1]IIS Aragon,Aragon Institute of Health Sciences,50009 Zaragoza,Spain;[2]Networked Biomedical Research Center Hepatic and Digestive Diseases(CIBERehd),C/Corcega 180 bajos dcha,08036 Barcelona,Spain;[3]Department of Medicine,Psychiatry and Dermatology,Medical University of Zaragoza,C/Domingo Miral,50009 Zaragoza,Spain;[4]Service of Gastroenterology,Hospital Clinico Universitario,Avda.San Juan Bosco 15,50009 Zaragoza,Spain

出　　处：《World Journal of Gastroenterology》索引2012年第18卷第45期,共11页

基　　金：Supported by Instituto de Salud Carlos Ⅲ with Grants FIS 08/1047 and CIBERehd;Instituto de Salud Carlos Ⅲ FI10/00167, to Chueca E 摘　　要：Gastrin is the main hormone responsible for the stimulation of gastric acid secretion;in addition,gastrin and its derivatives exert proliferative and antiapoptotic effects on several cell types.Gastrin synthesis and secretion are increased in certain situations,for example,when proton pump inhibitors are used.The impact of sustained hypergastrinemia is currently being investigated.In vitro experiments and animal models have shown that prolonged hypergastrinemia may be related with higher cancer rates;although,this relationship is less clear in human beings.Higher gastrin levels have been shown to cause hyperplasia of several cell types;yet,the risk for developing cancer seems to be the same in normo-and hypergastrinemic patients.Some tumors also produce their own gastrin,which can act in an autocrine manner promoting tumor growth.Certain cancers are extremely dependent on gastrin to proliferate.Initial research focused only on the effects of amidated gastrins,but there has been an interest in intermediates of gastrin in the last few decades.These intermediates aren't biologically inactive;in fact,they may exert greater effects on proliferation and apoptosis than the completely processed forms.In certain gastrin overproduction states,they are the most abundant gastrin peptides secreted.The purpose of this review is to examine the gastrin biosynthesis process and to summarize the results from different studies evaluating the production,levels,and effects of the main forms of gastrin in different overexpression states and their possible relationship with Barrett's and colorectal carcinogenesis. 关键词：胃泌素大肠癌癌症发病率胃酸分泌质子泵抑制剂肽肿瘤生长合成过程

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Role of gastrin-peptides in Barrett's and colorectal carcinogenesis

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