Regulation of major histocompatibility gene expression in teratocarcinoma 402AX cells.

Teratocarcinoma 402AX cells are induced to express major histocompatibility complex (MHC) antigens when passaged in vivo in genetically resistant host mice. Studies reported here demonstrate that MHC antigen induction is regulated in vivo in part by the synergistic action of Lyt 1 and Lyt 2 positive splenic T cells and in vitro by serum from tumor-primed resistant mice. Northern blots suggest that some teratocarcinoma 402AX MHC class I antigens may be post-transcriptionally regulated.