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有关免疫应答系统各种成分曾进行了研究,并确定了人类衰老过程常伴有对感染性疾病易感性增高病因。发现胸腺、T细胞分化部位和胸腺激素产物随年令变化。并发现由老年人获得的血液淋巴细胞总数降低,主要是T细胞减少。与包括T细胞数降低的细胞令导免疫改变相反,循环B细胞比例相对增加,B细胞是合成免疫球蛋白浆细胞的前体,是免疫应答体液成分。血清免疫球蛋白G和A的浓随年令增长而增加。本文研
Studies have been carried out on various components of the immune response system and it has been determined that the human senescence process is often accompanied by increased susceptibility to infectious diseases. Thymus, T-cell differentiation sites, and thymocyte production were found to change over the years. And found that the total number of blood lymphocytes obtained by the elderly decreased, mainly T cells. In contrast to cells that include reduced T cell counts, the proportion of circulating B cells is relatively increased. B cells are precursors of synthetic immunoglobulin plasma cells and are humoral components of the immune response. The concentration of serum immunoglobulins G and A increased with years of growth. This article