Inkeles B, Innes J B, Kuntz M M, Kadish A S, Weksler M E
J Exp Med. 1977 May 1;145(5):1176-87. doi: 10.1084/jem.145.5.1176.
The basis for the age-associated defect in the response of lymphocytes to plant lectins has been studied. Using three independent assays we have shown that the number of mitogen-responsive cells is markedly reduced in lymphocyte preparations from old persons. In addition, studies using colchicine bloock and thymidine pulse techniques have revealed a failure of mitogen-responsive cells from old persons to expand into a proliferating pool of lymphocytes as is observed when lymphocytes from young persons are cultured with phytohemagglutinin. Thus, the impaired response of lymphocytes from old persons to mitogens is attributable to a reduced number of mitogen responsive cells and their failure to undergo clonal expansion.
对淋巴细胞对植物凝集素反应中与年龄相关缺陷的基础进行了研究。通过三项独立检测,我们发现老年人淋巴细胞制剂中有丝分裂原反应性细胞的数量显著减少。此外,使用秋水仙碱阻断和胸腺嘧啶核苷脉冲技术的研究表明,与年轻人的淋巴细胞用植物血凝素培养时所观察到的情况不同,老年人的有丝分裂原反应性细胞无法扩展为增殖性淋巴细胞池。因此,老年人淋巴细胞对有丝分裂原的反应受损是由于有丝分裂原反应性细胞数量减少及其无法进行克隆扩增。