BAG3 and breast cancer: To further explore the effects of miR-135a-5p and BAG3 on the growth, migration, invasion, and cell cycle progression of BC cells, miR-NC, miR mimics, miR mimics+BAG3 and inh-NC, miR inhibitors, and miR inhibitors+si-BAG3 were co-transfected into MDA-MB-231 and MCF-7 cells, respectively, with qRT-PCR assay showing it a success (Fig. 4A).