AIM: To investigate the difference of gene expression profiles between Barrett's esophagus and reflux esophagitis induced by gastroduodenoesophageal reflux in rats. METHODS: Eight-week-old Sprague-Dawley rats were treated esophagoduodenostomy to produce gastroduodenoesophageal reflux, and another group received sham operation as control. Esophageal epithelial tissues were dissected and frozen in liquid nitrogen immediately for pathology 40 wk after surgery. The expression profiles of 4096 genes in reflux esophagitis and Barrett's esophagus tissues were compared with normal esophageal epithelium by cDNA microarray. RESULTS: Four hundred and forty-eight genes in Barrett's esophagus were more than three times different from those in normal esophageal epithelium, including 312 upregulated and 136 down-regulated genes. Two hundred and thirty-two genes in RE were more than three times different from those in normal esophageal epithelium, 90 up-regulated and 142 down-regulated genes. Compared to reflux esophagitis, there were 214 up-regulated and 142 down-regulated genes in Barrett's esophagus. CONCLUSION: Esophageal epithelium exposed excessively to harmful ingredients of duodenal and gastric reflux can develop esophagitis and Barrett's esophagus gradually. The gene expression level is different between reflux esophagitis and Barrett's esophagus and the differentially expressed genes might be related to the occurrence and development of Barrett's esophagus and the promotion or progression in adenocarcinoma.

目的 探讨自发性夜间胃碱化的形成是否与十二指肠胃反流（DGR）及迷走神经功能有关。方法 20例功能性消化不良（FD）患者采用胃内pH和胆红素同步监测法，比较夜间自发性碱化与胆汁反流的关系；另外20倒无心血管疾病的FD患者采用胃内pH和心电Holter同步监测，进行心率变异性（HRV）时域分析，以SDNN、rMSSD、PNN50为指标，观察夜间自发性碱化与迷走神经功能的关系。结果 20例FD患者中出现夜问自发性碱化者12例，其中8例（占66.7%）同时有胆红素吸光值升高；20例无心血管疾病的FD患者中13例有夜间自发性碱化，7例无自发性碱化，二者比较SDNN、rMSSD均在正常范围，差异无显著性（P>0.05）；24h胃pH与PNN50对照观察表明，夜间时段与白天相比PNN50明显升高，有自发性碱波组与无自发性碱化组二者相比，PNN50无显著差别。结论 自发性夜间胃碱化的形成与DGR有关，并不是迷走神经张力降低导致胃酸分泌减少所致。