Selective isolation and noninvasive analysis of circulating cancer stem cells through Raman imaging

Hyeon Yeol Cho, Md Khaled Hossain, Jin Ho Lee, Jiyou Han, Hun Joo Lee, Kyeong Jun Kim, Jong Hoon Kim, Ki Bum Lee, Jeong Woo Choi

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


Circulating cancer stem cells (CCSCs), a rare circulating tumor cell (CTC) type, recently arose as a useful resource for monitoring and characterizing both cancers and their metastatic derivatives. However, due to the scarcity of CCSCs among hematologic cells in the blood and the complexity of the phenotype confirmation process, CCSC research can be extremely challenging. Hence, we report a nanoparticle-mediated Raman imaging method for CCSC characterization which profiles CCSCs based on their surface marker expression phenotypes. We have developed an integrated combinatorial Raman-Active Nanoprobe (RAN) system combined with a microfluidic chip to successfully process complete blood samples. CCSCs and CTCs were detected (90% efficiency) and classified in accordance with their respective surface marker expression via completely distinct Raman signals of RANs. Selectively isolated CCSCs (93% accuracy) were employed for both in vitro and in vivo tumor phenotyping to identify the tumorigenicity of the CCSCs. We utilized our new method to predict metastasis by screening blood samples from xenograft models, showing that upon CCSC detection, all subjects exhibited liver metastasis. Having highly efficient detection and noninvasive isolation capabilities, we have demonstrated that our RAN-based Raman imaging method will be valuable for predicting cancer metastasis and relapse via CCSC detection. Moreover, the exclusion of peak overlapping in CCSC analysis with our Raman imaging method will allow to expand the RAN families for various cancer types, therefore, increasing therapeutic efficacy by providing detailed molecular features of tumor subtypes.

Original languageEnglish
Pages (from-to)372-382
Number of pages11
JournalBiosensors and Bioelectronics
Publication statusPublished - 2018 Apr 15


  • Circulating cancer stem cells
  • Circulating tumor cells
  • Metastasis
  • Raman imaging
  • Raman-active nanoprobes

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry


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