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Updated: Jun 5, 2026

An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues
Published on: April 5, 2018
Epigenetic heterogeneity and plasticity in therapy-induced tumor states through single-cell multi-omics
Hee Jung Kim1, Hwiyeong Lee2, Jin Hong2
1Ajou Energy Science Research Center, Ajou University, Suwon, Korea.
Abstract:
Therapeutic resistance and disease recurrence remain major unresolved challenges in oncology, primarily driven by tumor heterogeneity and the inherent plasticity of cancer cells. Although multiple biological mechanisms contribute to these processes, epigenetic mechanisms are the key regulators of clonal diversification and adaptive transcriptional reprogramming under treatment pressure. This regulatory layer operates through reversible transcriptional changes that are independent of DNA sequence alterations, enabling cancer cells to respond to a selective environment. Recent advances in analytical methodologies, particularly single-cell multi-omics approaches, have markedly improved our capacity to dissect these regulatory processes at a single-cell resolution. This review explores how diverse therapeutics, including chemotherapy, targeted agents, immunotherapy, hormonal interventions, and epigenetic drugs, induce the widespread remodeling of DNA methylation patterns, histone modifications, and chromatin accessibility. These therapy-induced molecular changes drive transitions to distinct cellular states that confer survival advantages such as drug-tolerant persister (DTP) phenotypes, senescence-like populations, epithelial-mesenchymal transition (EMT) states, and immune-evasive cell populations. We further evaluated the current single-cell multi-omics platforms for profiling chromatin-based plasticity and identifying biomarkers with direct clinical relevance. Finally, we discuss how integrative multi-layer analyses enable comprehensive characterization of tumor-state evolution, providing a conceptual framework for precision oncology strategies aimed at overcoming resistance.
Insights
Epigenetic mechanisms drive cancer cell plasticity and therapeutic resistance by altering gene expression without changing DNA sequence. Understanding these epigenetic changes is key to developing new precision oncology strategies.
Area of Science:
- Oncology
- Epigenetics
- Cancer Biology
Background:
- Therapeutic resistance and disease recurrence are significant challenges in oncology.
- Tumor heterogeneity and cancer cell plasticity are primary drivers of these challenges.
- Epigenetic mechanisms are key regulators of adaptive transcriptional reprogramming under treatment pressure.
Purpose of the Study:
- To review how diverse therapeutics induce epigenetic remodeling.
- To explore the role of epigenetic changes in driving distinct cellular states.
- To evaluate single-cell multi-omics platforms for profiling chromatin plasticity and identifying biomarkers.
Main Methods:
- Review of current literature on epigenetic mechanisms in cancer therapy resistance.
- Analysis of single-cell multi-omics approaches for dissecting epigenetic regulation.
- Evaluation of therapeutic interventions including chemotherapy, targeted agents, immunotherapy, hormonal interventions, and epigenetic drugs.
Main Results:
- Therapeutics induce widespread remodeling of DNA methylation, histone modifications, and chromatin accessibility.
- These epigenetic changes drive transitions to drug-tolerant persister (DTP) phenotypes, senescence-like populations, epithelial-mesenchymal transition (EMT) states, and immune-evasive cell populations.
- Single-cell multi-omics platforms enable profiling of chromatin-based plasticity and identification of clinically relevant biomarkers.
Conclusions:
- Epigenetic plasticity is a critical mechanism underlying therapeutic resistance and cancer recurrence.
- Single-cell multi-omics provides powerful tools to dissect these processes at high resolution.
- Integrative analyses offer a framework for developing precision oncology strategies to overcome resistance.
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