Numerous studies have shown that , upon HIV1 infection , human promonocytic U937 cells were induced to differentiate , as indicated , for example , by increased expression of adhesion molecules .
numerous studies have shown that , upon hiv1 infection , human promonocytic u937 cells were induced to differentiate , as indicated , for example , by increased expression of adhesion molecules .
O O O O O O O B-virus O O B-cell_line I-cell_line B-cell_line I-cell_line O O O O O O O O O O O O O O O B-protein_family_or_group I-protein_family_or_group O