Precision cell-free DNA extraction for liquid biopsy by integrated microfluidics

Hoyoon Lee, Chanhee Park, Wonhwi Na, Kyong Hwa Park, Sehyun Shin

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


Cell-free DNA (cfDNA) has been implicated as an important biomarker in cancer management. Thus, efficient techniques for cfDNA extraction are necessary for precision medicine. We developed a centrifugation-free cfDNA extraction microfluidic chip capable of extracting cfDNA from plasma samples through microfluidic circuits within 15 min under vacuum pressure using an immiscible solvent. The microfluidic chip had excellent performance that was comparable to the most widely used commercial product (QIAamp kit) in terms of extraction efficiency, purity, and quality of DNA samples. The microfluidic chip was validated for the continuous monitoring of HER-2 type breast cancer and was able to successfully detect a point mutation in phosphatidylinositol-4,5-bisphosphate 3-kinase (PIK3CA) during severe liver metastasis. The chip effectively eliminates the repetitive centrifugation processes and dramatically shortened the sample preparation time. The proposed platform could facilitate the development of a sample-to-answer system for use in liquid biopsy of cancers.

Original languageEnglish
Article number3
Journalnpj Precision Oncology
Issue number1
Publication statusPublished - 2020 Dec 1

ASJC Scopus subject areas

  • Cancer Research
  • Oncology


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