Mechanisms of Drug Resistance in Breast Cancer

Breast cancer is a complex disease resulting from the interaction between genetic and environmental factors, and addressing them constitutes one of the major challenges in the treatment of this disease. Resistance to therapies represents a significant obstacle to achieving effective results in the treatment of breast cancer, multiple therapeutic approaches are available to address this disease in patients. The majority of breast cancer cases show estrogen receptor (ERα) expression, and treatments targeting this pathway are critical in their approach. However, the emergence of resistance to these treatments is a common problem, leading to cancer recurrence and relapse. This review provides an overview of the mechanisms contributing to drug resistance, highlighting the relevance of epigenetic factors as promising therapeutic targets to address clinical resistance. Furthermore, it emphasizes the importance of further research to find effective strategies that can overcome this resistance and improve treatment outcomes in patients suffering from breast cancer.