中枢神经系统的免疫功能相对低下,主要由于:①缺乏淋巴组织,只含有少量淋巴细胞;②血脑屏障限制抗原、抗体进入中枢神经系统,并限制渗入细胞间隙。神经系统免疫功能的特点一、细胞介导免疫功能:与血液相比,脑脊液中的B细胞较少,而T细胞较多。在变性、炎性和自身免疫性疾病时,血脑屏障的紧密接 Central nervous system immune function is relatively low, mainly due to: ① lack of lymphoid tissue, containing only a small amount of lymphocytes; ② blood-brain barrier to limit the antigen, the antibody into the central nervous system and limit the infiltration into the intercellular space. Characteristics of the immune system of the nervous system First, the role of cell-mediated immune function: Compared with blood, less B cells in cerebrospinal fluid, while more T cells. In the degeneration, inflammatory and autoimmune diseases, the blood-brain barrier is closely linked