KLF4 and non-Hodgkin lymphoma: 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.