以前报道 T 细胞激活有三种途径:一种是抗原特异性途径,即识别抗原的 T 细胞抗原受体(TcR)(或 CD_3-Ti 复合物),另二种为抗原非特异性途径,即经过 T_(11)(即 CD_2)分子和 Tp44分子途径。CD_2分子在物理结构上未与 CD_3相连,T44既不与 TcR相连,又不与 CD_2分子相连,这三个途径的激活导 Previously it was reported that there are three ways to activate T cells: one is an antigen-specific pathway, that is, the T cell antigen receptor (TcR) (or CD_3-Ti complex) that recognizes the antigen, and the other two are non-specific antigen pathways, ie, after T_ (11) (ie CD2) molecules and Tp44 molecular pathways. The CD2 molecule is not physically linked to CD_3 and T44 is neither linked to TcR nor linked to CD_2. Activation of these three pathways