Co-administration of Marine Bromophenol Derivative (OSBP63) with paclitaxel (PTX), a conventional anticancer drug, significantly suppressed B-cell lymphoma-2 (BCL-2) expression and protein kinase B (AKT) phosphorylation, thereby demonstrating pronounced anti-tumor activity in a mouse model of breast cancer. The gene discussed is BCL2; the disease is breast carcinoma.