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Updated: Nov 8, 2025

Genome-wide Purification of Extrachromosomal Circular DNA from Eukaryotic Cells
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Small ring has big potential: insights into extrachromosomal DNA in cancer

Yihao Wang1,2, Rui Huang1,2, Guopei Zheng1,2

  • 1Department of Ophthalmology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, 200025, China.

Cancer Cell International
|April 27, 2021
PubMed

Insights

Extrachromosomal DNA (ecDNA) plays a key role in cancer by amplifying oncogenes. Understanding ecDNA mechanisms offers potential for new cancer diagnostics and therapies.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Recent advances reveal extrachromosomal DNA (ecDNA) has novel functions in various cancers.
  • Cancer-associated ecDNA is uniquely circular and frequently amplifies oncogenes more than linear DNA.
  • ecDNA amplification is common in cancers but rare in normal tissues.

Purpose of the Study:

  • To summarize current knowledge on ecDNA in cancer.
  • To explore the biological functions and molecular mechanisms of ecDNA.
  • To provide insights into the fundamental role of ecDNA in oncogenesis.

Main Methods:

  • Literature review of recent technical advances and studies on ecDNA.
  • Analysis of ecDNA's impact on oncogene activation, genomic instability, drug sensitivity, tumor heterogeneity, and immunology.
  • Synthesis of findings on ecDNA's role in cancer biology.

Main Results:

  • ecDNA is frequently amplified in most cancers, contributing to oncogene activation.
  • ecDNA significantly impacts genomic instability, drug sensitivity, tumor heterogeneity, and tumor immunology.
  • The unique characteristics of ecDNA present potential for cancer diagnosis and therapeutics.

Conclusions:

  • ecDNA is a crucial factor in cancer development and progression.
  • Further research into ecDNA mechanisms is needed for therapeutic applications.
  • ecDNA represents a promising target for future cancer diagnostics and treatments.
Keywords:
Chromosomal rearrangementEcDNAEpigenetic modificationOncogene amplificationTumor heterogeneity

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