Related Experiment Video
Updated: Jan 28, 2026
Enrichment for Chemoresistant Ovarian Cancer Stem Cells from Human Cell Lines
Published on: September 10, 2014
Molecular basis of cancer chemoresistance: biochemical insights
1Department of Molecular Biology, Biotechnology Research Institute, National Research Centre, Cairo Governorate, Egypt.
Abstract:
Chemoresistance remains a major barrier in cancer therapy, frequently resulting in treatment failure and reduced patient survival. This multifaceted phenomenon arises from the interplay of well-established mechanisms such as genetic mutations, non-genetic adaptations, and tumor microenvironment (TME) mediated influences as well as newly emerging findings from recent research (2020-present). Key biochemical contributors include diminished intracellular drug accumulation through altered uptake or efflux, dysregulation of drug metabolism and bioactivation involving multiple Phase I and Phase II enzymes, genomic instability affecting DNA repair pathways, disruption of cell cycle control, and evasion of apoptosis. In addition, recent evidence highlights the roles of epigenetic reprogramming, metabolic reconfiguration, and TME-derived signaling in amplifying chemoresistance. This review integrates both foundational concepts and recent advancements in understanding drug resistance, with particular emphasis on updated insights into drug-metabolizing enzymes and their impact on therapeutic failure. It also evaluates current and emerging strategies to overcome resistance including targeting metabolic enzymes, modulating the TME, and implementing polytherapy's that address multiple resistance pathways. By synthesizing established knowledge with recent discoveries, this review highlights promising directions for improving the efficacy of cancer treatments and enhancing patient outcomes.
Insights
Chemoresistance, a major hurdle in cancer treatment, stems from complex genetic and non-genetic factors. Understanding drug metabolism and the tumor microenvironment (TME) is key to developing new therapies.
Area of Science:
- Oncology
- Pharmacology
- Biochemistry
Background:
- Chemoresistance significantly limits cancer treatment efficacy and patient survival.
- It involves diverse mechanisms including genetic mutations, epigenetic changes, and tumor microenvironment (TME) interactions.
- Recent research (2020-present) has expanded our understanding of these complex resistance pathways.
Purpose of the Study:
- To review and integrate foundational knowledge with recent advancements in chemoresistance.
- To emphasize the role of drug-metabolizing enzymes and TME signaling in therapeutic failure.
- To evaluate strategies for overcoming chemoresistance.
Main Methods:
- Literature review synthesizing established concepts and recent findings (2020-present).
- Focus on biochemical mechanisms, epigenetic reprogramming, metabolic alterations, and TME influences.
- Evaluation of current and emerging therapeutic strategies.
Main Results:
- Chemoresistance involves altered drug accumulation, metabolism, DNA repair, cell cycle control, and apoptosis evasion.
- Epigenetic reprogramming, metabolic shifts, and TME signaling are critical in amplifying resistance.
- Drug-metabolizing enzymes play a significant role in treatment failure.
Conclusions:
- Targeting metabolic enzymes, modulating the TME, and employing polytherapies are promising strategies.
- Integrating recent discoveries with existing knowledge is crucial for improving cancer treatment efficacy.
- Enhanced understanding of chemoresistance mechanisms offers new avenues for better patient outcomes.
Related Concept Videos
02:00Molecular Models
03:51Molecular Orbital Theory II
02:54Molecular and Ionic Solids
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
02:35Molecular Orbital Theory I
02:27Predicting Molecular Geometry
03:07Kinetic Molecular Theory: Molecular Velocities, Temperature, and Kinetic Energy