2) B-NHL cell lines were transfected with miR-7 precursors and the overexpression of miR-7 was evaluated, as well as the inhibition by miR-7 inhibitor transfection, evaluating their role on the expression of KLF4 and YY1 in these cells lines and by using reporter plasmids containing the 3’UTR regions of KLF4 and YY1. Here, YY1 is linked to non-Hodgkin lymphoma.