Administration of Inhibitory Molecules through Nanoparticles in Breast Cancer Therapy

According to Global Cancer Statistics, breast cancer is the second leading cause of mortality in women. While there are several treatments for breast cancer, they are not al-ways effective. In most cases, after initial treatment, patients may present a low response to therapy, more severe relapses, and even drug resistance. Hence, more effective and targeted therapies are needed. Recently, the use of nanoparticles has emerged as a promising alterna-tive that will allow the controlled release of drugs in response to stimuli, precise delivery to the site of action, lower levels of toxicity, and fewer side effects. In this review, we provide an overview of the recent evidence proposing the delivery of inhibitory molecules encapsulated in nanoparticles as a new therapy for breast cancer that targets the signaling pathways governing the processes of tumor formation, maintenance, and expansion.