Circulating tumor DNA as a biomarker in early phase clinical trials

Harold N Tan1, Mitchell J Elliott2, Ian M Silverman3

  • 1University of Texas MD Anderson Cancer Center, Houston, TX, USA.

Cancer Cell
|December 19, 2025
PubMed

Insights

Circulating tumor DNA (ctDNA) is a powerful biomarker in early cancer drug development. It aids in detecting mutations, predicting treatment success, and understanding tumor changes, accelerating precision medicine.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Precision medicine in cancer therapeutics relies on molecular biomarkers.
  • Circulating tumor DNA (ctDNA) is emerging as a key tool in oncology.
  • Early phase clinical trials are crucial for novel cancer drug development.

Purpose of the Study:

  • To highlight the current applications of ctDNA in early phase clinical trials.
  • To explore future opportunities for ctDNA as a multi-utility biomarker.
  • To emphasize ctDNA's role in advancing precision medicine for cancer.

Main Methods:

  • Literature review of ctDNA applications in early phase oncology trials.
  • Analysis of ctDNA's utility in detecting targetable alterations.
  • Evaluation of ctDNA's role in predicting therapeutic response and monitoring tumor evolution.

Main Results:

  • ctDNA enables detection of targetable genetic alterations.
  • ctDNA can predict patient response to cancer therapies.
  • ctDNA provides insights into tumor evolution and resistance mechanisms.
  • ctDNA informs pharmacokinetic and pharmacodynamic assessments.

Conclusions:

  • ctDNA is a versatile biomarker with significant potential in early phase clinical trials.
  • Integrating ctDNA analysis can accelerate the development of novel cancer therapeutics.
  • Further research can expand the utility of ctDNA in precision oncology.