单词 | helper cell |
释义 | > as lemmashelper cell Immunology. Any of a subset of T lymphocytes that assist in the production of immune responses by generating lymphokines that stimulate antibody secretion by B cells, the development of cytotoxic T cells, and the activation of macrophages. Chiefly attributive, esp. in helper cell, helper T cell. ΚΠ 1969 Transplantation Rev. 1 142 This ‘helping’ function of thymus-derived cells requires that they be alive and non-irradiated.] 1970 European Jrnl. Immunol. 1 21/2 ‘Helper cell’ and ‘AFCP’ [= antibody-forming cell precursors]. 1972 Proc. National Acad. Sci. U.S.A. 180 359 Data previously referred to imply that whenever this is precluded by rapid induction of tolerance, either in mandatory helper T cells or in B cells directly..irreversible unresponsiveness will develop which requires cell recruitment for recovery. 1985 Science 2 Aug. 476/3 Clusters that had developed in the presence of specific proteins..generated lymphoblasts with radioresistant carrier-specific helper activity. 1992 Economist 1 Aug. 81/3 Since the mid-1980s work on mice has shown the existence of two job-specific subgroups of helper T-cell, called TH1 and TH2. 1994 Sci. News 20 Aug. 121/1 The lymphocytes made famous by AIDS..are CD4 T helpers, which carry CD4 molecules. 2000 Independent 1 June i. 3/4 During the day we have more ‘killer’ immune cells circulating in our blood; but at night other ‘helper’ cells from the immune system are more active. < as lemmas |
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