溃疡性结肠炎 (ＵｌｃｅｒａｔｉｖｅＣｏｌｉｔｉｓＵＣ)与克隆病 (Ｃｒｏｈｎ’ｓＤｉｓｅａｓｅ)同属炎症性肠病 (ＩＢＤ) ,ＵＣ在我国有逐年增多的趋势。然而 ,其病因及发病机制至今尚不清楚 ,其免疫学机制越来越多地被人们所关注。肠道粘膜免疫系统起着重要作用。有许多细 Ulcerative Colitis UC and Crohn’s disease belong to inflammatory bowel disease (IBD). UC has a tendency of increasing year by year in our country. However, its etiology and pathogenesis are still unclear, and its immunological mechanism is increasingly being concerned about. Intestinal mucosal immune system plays an important role. There are many fine