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Updated: Jul 3, 2025
Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms
Published on: December 9, 2015
Insights into molecular mechanisms of chemotherapy resistance in cancer
Animesh Kar1, Shivam Agarwal2, Agrata Singh2
1Regional Centre for Biotechnology, NCR Biotech Science Cluster, 3rd Milestone Faridabad-Gurgaon Expressway, Faridabad-121001, Haryana, India.
Abstract:
Cancer heterogeneity poses a significant hurdle to the successful treatment of the disease, and is being influenced by genetic inheritance, cellular and tissue biology, disease development, and response to therapy. While chemotherapeutic drugs have demonstrated effectiveness, their efficacy is impeded by challenges such as presence of resilient cancer stem cells, absence of specific biomarkers, and development of drug resistance. Often chemotherapy leads to a myriad of epigenetic, transcriptional and post-transcriptional alterations in gene expression as well as changes in protein expression, thereby leading to massive metabolic reprogramming. This review seeks to provide a detailed account of various transcriptional regulations, proteomic changes, and metabolic reprogramming in various cancer models in response to three primary chemotherapeutic interventions, docetaxel, carboplatin, and doxorubicin. Discussing the molecular targets of some of these regulatory events and highlighting their contribution in sensitivity to chemotherapy will provide insights into drug resistance mechanisms and uncover novel perspectives in cancer treatment.
Insights
Chemotherapy alters gene expression and metabolism, impacting cancer treatment. Understanding these changes, including transcriptional regulation and proteomic shifts, is key to overcoming drug resistance and improving cancer therapy.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Cancer heterogeneity presents a major challenge to effective treatment.
- Chemotherapy efficacy is limited by cancer stem cells, lack of biomarkers, and drug resistance.
- Chemotherapy induces significant molecular and metabolic changes in cancer cells.
Purpose of the Study:
- To review transcriptional regulations, proteomic changes, and metabolic reprogramming in response to docetaxel, carboplatin, and doxorubicin.
- To discuss molecular targets involved in chemotherapy sensitivity and resistance.
- To provide insights into novel cancer treatment strategies.
Main Methods:
- Literature review of transcriptional, proteomic, and metabolic alterations.
- Analysis of responses to docetaxel, carboplatin, and doxorubicin in various cancer models.
- Discussion of molecular mechanisms underlying chemotherapy effects.
Main Results:
- Chemotherapy induces widespread epigenetic, transcriptional, and post-transcriptional gene expression changes.
- Significant alterations in protein expression and massive metabolic reprogramming occur during chemotherapy.
- These molecular changes contribute to both chemotherapy sensitivity and the development of drug resistance.
Conclusions:
- Understanding chemotherapy-induced molecular and metabolic reprogramming is crucial for improving treatment outcomes.
- Identifying molecular targets can help overcome drug resistance mechanisms.
- This review offers insights into novel therapeutic perspectives for cancer treatment.
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