BECN1 and breast cancer: Moreover, transfection of the wild-type BC cell lines T24 and 5637 with the hsa-miR-30a-3p mimic revealed that the hsa-miR-30a-3p mimic suppresses ATG5/12 and Beclin 1 more than the hsa-miR-30a-5p mimic does (Fig. 5B, C).