Abstract
The effects of addition of anti-Ia sera to cultures of B cells responding to a number of different stimuli were studied. Anti-Ia sera inhibited the responses of B cells to thymus-dependent and thymus-independent antigens. The effects of antisera directed at different subregions within theI region were examined, using the same anti-Ia serum and mouse strains congenic atI. There was some indication that antisera directed at theI-C region might be more efficient at inhibiting responses to a thymus-independent antigen than to a thymus-dependent antigen. An antiserum to another B-cell surface component controlled by theH-2 complex, the D glycoprotein, had no effect on the response of B cells to a thymus-dependent antigen. By contrast, anti-Ia serum added to cultures had no effect on the activity of a T cell-derived, nonspecific, B-cell helper mediator (NSM). We concluded that the binding of anti-Ia sera to B-cell surfaces inhibited B-cell responses to antigen, either by competing directly with the binding of signal molecules, or by delivering an inhibitory signal to the B cell, such that it was subsequently refractory to stimulatory signals.
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Marrack, P., Kappler, J.W. Anti-Ia inhibits the activity of B cells but not a T cell-derived helper mediator. Immunogenetics 4, 541–555 (1977). https://doi.org/10.1007/BF01575688
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DOI: https://doi.org/10.1007/BF01575688