免疫共刺激分子在Ｔ细胞活化和免疫应答的调节过程中发挥重要作用。共刺激分子ＣＤ2 8和ＣＴＬＡ4作为Ｂ7的受体分子 ,ＣＤ2 8在启动Ｔ细胞免疫应答中发挥重要作用 ,其中ＣＴＬＡ4具有更高的亲和力 ,在Ｔ细胞活化后被诱导并负调节Ｔ细胞的反应。最近发现的有一个新的诱导性免疫 Immunostimulatory molecules play an important role in the regulation of T cell activation and immune response. Costimulatory molecules CD2 8 and CTLA4, as receptor molecules of B7, play an important role in initiating T cell immune responses. CTLA4 has a higher affinity and is induced after T cell activation and negatively regulates T cell responses. Recently discovered a new induced immunity