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The applications of plasma cell-free DNA in cancer detection: Implications in the management of breast cancer patients

Journal

CRITICAL REVIEWS IN ONCOLOGY HEMATOLOGY
Volume 175, Issue -, Pages -

Publisher

ELSEVIER SCIENCE INC
DOI: 10.1016/j.critrevonc.2022.103725

Keywords

Liquid biopsy; Breast cancer; Circulating tumor DNA

Funding

  1. National Cancer Institute [2 R01 CA149385]
  2. Department of Defense [W81XWH-18-1-0058]
  3. Cedars-Sinai Medical Center
  4. Kanzawa Medical Foundation, Japan
  5. Margie and Robert E. Petersen Foundation

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Liquid biopsy is a rapidly developing field in oncology that detects cancer through DNA, RNA, and protein analysis in body fluids. It provides real-time reporting of tumor burden and is applicable for screening tumor types without standard screening approaches. Genetic mutation and DNA methylation profiling are the main methods for liquid biopsy.
Liquid biopsy probes DNA, RNA, and proteins in body fluids for cancer detection and is one of the most rapidly developing areas in oncology. Tumor-derived DNA (circulating tumor DNA, ctDNA) in the context of cell-free DNA (cfDNA) in blood has been the main target for its potential utilities in cancer detection. Liquid biopsy can report tumor burden in real-time without invasive interventions, and would be feasible for screening tumor types that lack standard-of-care screening approaches. Two major approaches to interrogating ctDNA are genetic mutation and DNA methylation profiling. Mutation profiling can identify tumor driver mutations and guide precision therapy. Targeted genomic profiling of DNA methylation has become the main approach for cancer screening in the general population. Here we review the recent technological development and ongoing efforts in clinical applications. For clinical applications, we focus on breast cancer, in which subtype-specific biology demarcates the applications of ctDNA.

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