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- W2039823714 abstract "Recently we demonstrated that the nonadherent (to plastic) fraction of human PBMC could be activated by IL-2 to inhibit Cryptococcus neoformans growth. Here we characterize the antifungal effector cells. Depletion by panning of natural killer (NK) (CD16+, CD56+) cells from nylon wool-treated, IL-2-activated PBMC markedly decreased lytic activity against a tumor cell target (K562) but did not affect antifungal activity. Panning out T (CD3+, CD5+) cells enhanced activity against tumor cells but partially abrogated activity against C. neoformans. IL-2-activated T cells of 95% purity, obtained by panning out NK cells from PBMC forming rosettes with sheep erythrocytes, had excellent antifungal activity but suboptimal antitumor activity. The nonrosetted cells (which were virtually free of T cells and enriched for NK cells) had both antitumor and antifungal activity, even if cultured without IL-2. CD4+, CD8+, and CD56+ cells, purified by positive selection by panning, directly inhibited cryptococcal growth. Conjugate formation between fungi and both CD56+ and CD5+ effector cells was demonstrated by videomicroscopy and immunoperoxidase staining. Thus, IL-2-activated T cells and NK cells form conjugates with and directly inhibit the growth of C. neoformans. To our knowledge, these data are the first demonstration of human T cells directly inhibiting growth of a microbial target." @default.
- W2039823714 created "2016-06-24" @default.
- W2039823714 creator A5052165123 @default.
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- W2039823714 date "1993-04-01" @default.
- W2039823714 modified "2023-09-26" @default.
- W2039823714 title "Phenotypic and functional characterization of human lymphocytes activated by interleukin-2 to directly inhibit growth of Cryptococcus neoformans in vitro." @default.
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- W2039823714 doi "https://doi.org/10.1172/jci116354" @default.
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