LRRC75A and breast cancer: To verify the function of the LRRC75A-AS1/miR-489-3p/ARD1 network in BC, we conducted a rescue experiment, MTT, Transwell test, and Western blotting, demonstrating that overexpression of LRRC75A-AS1 promoted the proliferation, invasion, and metastasis of BC cells; conversely, LRRC75A-AS1-induced proliferation and invasion were inhibited when miR-489-3p was overexpressed.