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Updated: Oct 21, 2025
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Genome-wide Purification of Extrachromosomal Circular DNA from Eukaryotic Cells
Published on: April 4, 2016
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Small extrachromosomal circular DNA (eccDNA): major functions in evolution and cancer
Xiaoxuan Ling1, Yali Han1, Jinxue Meng1
1Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, 523808, P.R. China.
Molecular Cancer
|September 4, 2021
Summary
Extrachromosomal circular DNA (eccDNA) molecules are key to understanding cancer progression and drug resistance. Their unique structure and diversity offer new avenues for cancer monitoring, diagnosis, and treatment.
Area of Science:
- Genetics
- Molecular Biology
- Cancer Research
Background:
- Extrachromosomal circular DNA (eccDNA) are DNA molecules found outside of chromosomes.
- Recent technological advances have revealed eccDNAs as multifunctional molecules with significant biological roles.
- EccDNAs are present in both normal and cancerous cells, influencing various cellular processes.
Purpose of the Study:
- To summarize the features, biogenesis, functions, and mechanisms of eccDNA.
- To highlight the role of eccDNA in cancer initiation, progression, and treatment resistance.
- To explore the potential clinical utility of eccDNA in cancer management and evolution.
Main Methods:
- Review of current literature on eccDNA.
- Analysis of eccDNA structural diversity and numerical variation.
- Investigation of eccDNA's role in cellular stress response, aging, and carcinogenesis.
- Examination of eccDNA's contribution to drug resistance in cancer therapy.
Main Results:
- EccDNAs possess unique topological and genetic characteristics crucial for cancer monitoring and diagnosis.
- EccDNAs play diverse roles in stress response, aging, carcinogenesis, and drug resistance.
- Structural and numerical diversity of eccDNAs drives genetic plasticity and heterogeneity in cancer evolution.
Conclusions:
- EccDNAs hold significant potential for cancer early diagnosis, treatment, and prediction.
- The role of eccDNA in driving evolution through genetic plasticity is increasingly recognized.
- Further research into eccDNA mechanisms and clinical applications is warranted for improved cancer care.
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