LC upregulation of of I-Ad, CD80, CD86 and CD40 by cultured epidermal cells is inhibited by TSE. BALB/c epidermal cells were cultured in dilutions of TSE or medium alone for 15 hours and then cells were stained with chromophore-labeled antibodies to I-Ad, CD80, CD86 and CD40. After gating on I-A+ cells, expression of I-A, CD80, CD86 and CD40 was examined by FACS.