Potent negative allosteric modulator of LFA-1 (lymphocyte function-associated antigen-1) (Kd = 26 nM). Binds to the I-domain of LFA-1. Reversibly inhibits LFA-1 mediated binding of SKW3 leukemia cells to ICAM-1. Inhibits superantigen (SEB)-induced IL-2 production from lymphocytes in vitro and attenuates the SEB-induced increase in IL-2 plasma levels in a mouse model in vivo. Orally available.
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