Heterogeneity of the Signal Requirements During the Primary Activation of Resting Lyt-2+ Cytotoxic T-Lymphocyte (CTL) Precursors into Clonally Developing CTL
The in vitro requirements for cell interactions between antigen-presenting cells, T-helper cells, and cytotoxic T-lymphocyte precursors (CTL-P) for the induction of T-cell mediated cytotoxic responses has been recognized as early as 1973 (BACH et al. 1973; Wagner 1973; Cantor and Boyse 1975). After the discovery of the T-cell growth factor interleukin 2 (IL-2) (Morgan et al. 1976), it soon became clear that the T-helper cell product IL-2 (Wagner and Rollinghoff 1978) was crucial in T-T cell interactions during primary cytotoxic T-cell responses (Wagner et al. 1980a; Simon et al. 1981).
KeywordsCytolytic Activity Signal Requirement Responder Cell Cytotoxic Effector Cell Normal Human Bone Marrow
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