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Extrachromosomal oncogene amplification in tumour pathogenesis and evolution
Roel G W Verhaak1, Vineet Bafna2, Paul S Mischel3,4
1The Jackson Laboratory for Genomic Medicine, Farmington, CT, USA. roel.verhaak@jax.org.
Nature Reviews. Cancer
|March 16, 2019
Summary
Extrachromosomal DNA (ecDNA) amplification of oncogenes drives cancer progression and heterogeneity. Unequal ecDNA segregation fuels tumor evolution and treatment resistance, offering new therapeutic targets.
Area of Science:
- Oncology
- Genetics
- Molecular Biology
Background:
- Extrachromosomal DNA (ecDNA) amplification of oncogenes is increasingly recognized in various cancers.
- This phenomenon, initially observed decades ago, is now a focal point of cancer research.
- ecDNA contributes to increased oncogene copy number within cancer cells.
Purpose of the Study:
- To review current knowledge on oncogene amplification via ecDNA in cancer.
- To discuss the implications of ecDNA in tumor heterogeneity and evolution.
- To highlight the potential of targeting ecDNA-driven mechanisms in cancer therapy.
Main Methods:
- This is a perspectives article, synthesizing existing research and literature.
- It involves a review of recent reports and historical findings on ecDNA.
- Discussion of biological mechanisms and clinical relevance.
Main Results:
- Oncogene amplification on ecDNA increases oncogene copy number.
- Unequal segregation of ecDNA during cell division significantly enhances tumor heterogeneity.
- This heterogeneity provides tumors with adaptive advantages against stress and therapies.
Conclusions:
- Oncogene amplification on ecDNA is a critical driver of cancer development and progression.
- The role of ecDNA in tumor heterogeneity presents new avenues for understanding cancer evolution.
- Targeting ecDNA may offer novel therapeutic strategies for combating cancer.
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