A, HCC827/AR cells were treated with DMSO, 200 nM osimertinib (Osim), 100 μM berberine (BBR) or their combination for varied times as indicated, then harvested for preparation of whole-cell protein lysates and subsequent Western blotting to detect the indicated proteins. B, The indicated cell lines seeded in 96-well plates were exposed to varied concentrations of berberine for 72 h. Cell numbers were determined with the SRB assay. The data are means ± SDs of four replicate determinations.