Wallace D L, Beverley P C
ICRF Human Tumour Immunology Group, Courtauld Institute of Biochemistry, London.
Immunology. 1990 Mar;69(3):460-7.
Resting CD45RO+, mature/memory, T cells are phenotypically distinct from intermediate CD45RO+/CD45RA+ and CD45RA+, immature/virgin, T cells, and are characterized by high levels of expression of a number of adhesion molecules, such as CD2, CD18, CD58 and CD29. The kinetics of up-regulation of molecules, like CD25 and CD54 associated with activation, were similar in both subsets and suggested that their high level expression was associated with later events rather than initial recognition and signal transduction. CD45RA+ T cells, unlike CD45RO+ T cells, were unable to proliferate in response to mitogenic combinations of CD2 monoclonal antibodies (mAb), although in combination with submitogenic doses of PMA both up-regulation of cell-surface molecules and proliferation occurred. In addition, recruitment of CD45RA+ T cells by CD2 mAb-activated CD45RO+ T cells can occur.
静息的CD45RO⁺成熟/记忆T细胞在表型上与中间型CD45RO⁺/CD45RA⁺和CD45RA⁺未成熟/初始T细胞不同,其特征在于多种黏附分子的高表达水平,如CD2、CD18、CD58和CD29。与激活相关的分子(如CD25和CD54)上调的动力学在两个亚群中相似,这表明它们的高表达水平与后期事件相关,而非初始识别和信号转导。与CD45RO⁺ T细胞不同,CD45RA⁺ T细胞不能对CD2单克隆抗体(mAb)的促有丝分裂组合产生增殖反应,尽管与亚致有丝分裂剂量的佛波酯联合使用时,细胞表面分子会上调且会发生增殖。此外,CD2 mAb激活的CD45RO⁺ T细胞可招募CD45RA⁺ T细胞。