Molecular Mechanism of Breast Cancer and Predisposition of Mouse Mammary Tumor Virus Propagation Cycle

Over the past few decades, women have been troubled by grave diseases such as breast cancer, which are biologically and molecularly classified as hereditary diseases. Even though the risk of other cancers is relatively different and the downstream pathway of genetic mutation differs from breast cancer, the continued transformation of genes such as BRCA1 and BRCA2 leads to breast cancer malignancy. Notably at the molecular level, a parallel connection between the normal growth of breast and the progression of mammary cancer where the breast cancer stem cells play a crucial role in the advancement of mammary carcinoma. Arguably, several significant signaling pathways, for instance, ER signaling, HER2 signaling, and Wnt signaling control the typical breast development as well as breast stem cells, thereby cell proliferation, cell differentiation, and cell motility are involved. Incidentally, the Mouse Mammary Tumor Virus (MMTV) is notable among the unexplained viral components influenced by virus-corrupting mammary carcinomas. According to the genesis, MMTV proviral DNA is integrated into mammary epithelial cells, and genomic lymphoid cells during viral replication and triggers the progression of cellular oncogenesis. This overview reveals the deadliest theories on breast cancer, molecular mechanisms, and the MMTV transmission cycle. To establish prevention therapies that are both acceptable and efficacious, addressing apprehensions related to the toxicity of these interventions must be a preliminary hurdle to overcome.