Abstract
AbstractCancer cell plasticity is the ability of tumor cells to switch phenotypes and is one of the predominant requisites of cancer cells capable of undergoing metastasis. Cancer cell plasticity is also recognized as one of the major contributors to intratumoral heterogeneity, a critical factor underlying the progression of malignant tumors, which is known to modify tumor response and induce resistance against various modes of therapy, thus posing a barrier to efficient cancer management. Cancer cell plasticity is acquired by the subversion of cell signaling pathways like mitogen‐activated protein kinase pathway, phosphoinositide‐3‐kinase, signal transducer and activator of transcription 3, Wnt, Hedgehog and Notch as well as cellular programs such as epithelial to mesenchymal transition and phenotypic plasticity. This complex phenomenon has been studied in many cancer types like pancreatic cancer, colon cancer and breast cancer. This review will explore the current understanding we have in breast cancer on the intrinsic molecular mechanisms of cancer cell plasticity and the resistance to various types of cancer therapy that arise as a result of plasticity. We conclude by exploring the potential novel therapies that specifically target the pathways leading to plasticity and can be leveraged to treat patients living with the disease.
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