After stimulation by PMA , RXR alpha expression increased in H9 and U937 cells but not in CEM cells .
after stimulation by pma , rxr alpha expression increased in h9 and u937 cells but not in cem cells .
O O O B-other_organic_compound O B-protein_molecule I-protein_molecule O O O B-cell_line O B-cell_line I-cell_line O O O B-cell_line I-cell_line O