Abstract
Occupancy of the T-cell antigen receptor is insufficient to induce T-cell activation optimally; a second co-stimulatory signal is required1. Exposure of T-cell clones to complexes of antigen with major histocompatibility complex molecules in the absence of the co-stimulatory signal induces a state of clonal anergy. This requirement for two stimuli for T-cell activation could have an important role in vivo in establishing peripheral tolerance to antigens not encountered in the thymus1,2. The receptor on T cells required for the co-stimulatory stimulus involved in the prevention of anergy has not been identified. The human T-cell antigen CD28 provides a signal that can synergize with T-cell antigen receptor stimulation in activating T cells to proliferate and secrete lymphokines3-6. Here we report that a monoclonal antibody against the murine homologue of CD28 (ref. 7; J.A.G. et al., manuscript in preparation) can provide a co-stimulatory signal to naive CD4+ T cells and to T-cell clones. Moreover, we demonstrate that this co-stimulatory signal can block the induction of anergy in T-cell clones.
Original language | English (US) |
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Pages (from-to) | 607-609 |
Number of pages | 3 |
Journal | Nature |
Volume | 356 |
Issue number | 6370 |
DOIs | |
State | Published - 1992 |
Externally published | Yes |
ASJC Scopus subject areas
- General