Effect of ischemic preconditioning on gene expression profile in small intestinal allografts in rats / 中国普通外科杂志

ABSTRACT

Objective To determine the changes of gene expression profile in small intestinal allograft in rats after ischemic preconditioning(IPC),and to study the mechanism of graft protection of IPC.Methods Rats are randomly divided into 3 groupssham operation(S group),small bowel transplant(SBT group)and IPC small bowel transplant group(ISBT group).Total RNAs was extracted from intestine of the 3 groups 1h after the intestine remored and cold preservation/reperfusion,and then purified to mRNA.mRNAs was then reversely transcribed to cDNA and to prepare hybridization probes.The mixed probes were hybridized to the cDNA microarray.After high-stringent washing,the fluorescent signals on cDNA microarray were scanned and analyzed.Results Among the 4 096 target genes,297 differentially expressed genes were identified between normal intestine and intestinal allograft in ISBT group;among those 84 genes which have been reported,including 18 genes expressing down and 66 genes expressing up regulation.Differentially expressing genes could be related to the protective effect of IPC.Conclusions The mechanisms of protective effect of IPC on cells of the graft are by modulation of genes related to cell adhesion,related to cellular energy and metabolism,and related to the signal transmission of the cells.