si-RNA-Mediated Silencing of ADRBK1 Gene Attenuates Breast Cancer Cell Proliferation.

Breast cancer is the most prominent cause of cancer-related deaths among women worldwide. It has been found that genetic mutations play distinct roles in the onset and progression of breast cancer. Androgenic, beta, receptor kinase 1 (ADRBK1) has been reported to possess oncogenic characteristics vital for cancer cell viability. This study was designed to investigate the effects of small interference RNA (si-RNA)-mediated ADRBK1 knockdown on breast cancer cell growth in vitro. High-expression levels of ADRBK1 were observed in all tested breast cancer cell lines (MDA-MB-231, MCF-7, T-47D, and BT-474). ADRBK1 si-RNA was delivered to breast cancer cells using lentivirus delivery system. Depletion of ADRBK1 significantly attenuated the cell viability and colony-formation ability. Flow cytometry analysis further demonstrated that ADRBK1 silencing led to MDA-MB-231 cell arrest in the G(0)/G(1) phase. Collectively, these results indicate that knockdown of ADRBK1 gene has detrimental effects on breast cancer cell growth, which may be a potential therapeutic approach for the treatment of breast cancer.