B7-1 expression was closely corelated with the histological activity grade(HAI) and serum alanine transaminase(ALT) level.

• 随B7- 1阳性表达程度的增强 ,肝组织炎性活动积分 (HAI)及血清丙氨酸转氨酶 (ALT)异常值明显增加。