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Understanding and targeting resistance mechanisms in cancer
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Journal Article
Understanding and targeting resistance mechanisms in cancer
2023
Overview
Resistance to cancer therapies has been a commonly observed phenomenon in clinical practice, which is one of the major causes of treatment failure and poor patient survival. The reduced responsiveness of cancer cells is a multifaceted phenomenon that can arise from genetic, epigenetic, and microenvironmental factors. Various mechanisms have been discovered and extensively studied, including drug inactivation, reduced intracellular drug accumulation by reduced uptake or increased efflux, drug target alteration, activation of compensatory pathways for cell survival, regulation of DNA repair and cell death, tumor plasticity, and the regulation from tumor microenvironments (TMEs). To overcome cancer resistance, a variety of strategies have been proposed, which are designed to enhance the effectiveness of cancer treatment or reduce drug resistance. These include identifying biomarkers that can predict drug response and resistance, identifying new targets, developing new targeted drugs, combination therapies targeting multiple signaling pathways, and modulating the TME. The present article focuses on the different mechanisms of drug resistance in cancer and the corresponding tackling approaches with recent updates. Perspectives on polytherapy targeting multiple resistance mechanisms, novel nanoparticle delivery systems, and advanced drug design tools for overcoming resistance are also reviewed. The reduced responsiveness of cancer cells can be associated with various mechanisms, including drug inactivation, reduced intracellular drug accumulation by reduced uptake or increased efflux, drug target alteration, activation of compensatory pathways for cell survival, regulation of DNA repair and cell death, tumor plasticity, and the regulation from tumor microenvironments. Various targeting strategies against different resistance mechanisms have been developed. The purpose of overcoming the drug resistance of cancer cells is to optimize the sensitivity of the therapy. This can be achieved by polytherapy using the combination of at least two drugs; immunotherapy using checkpoint inhibitors or monoclonal antibodies; antibody‐drug conjugates improving the selectivity of cancer treatment; gene technology modifying the epigenetic sequence; targeted therapy targeting the overexpression of drug efflux transporter or vital proteins for the cancer cell apoptosis; and nanoparticle delivery system improving the efficacy of the drug and reducing the side effect.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
Subject
