BACKGROUND: B7-homolog 1 (B7-H1) is one of important members of costimulatory molecule B7 family and broadly induced in the majority of peripheral tissues as well as lymphocyte.

• 摘要背景：B7同系物1(B7-H1)分子是共刺激分子B7家族的重要成员，在淋巴细胞及大部分外周组织可以广泛诱导性表达。