The diagnostic significance of CDH17-positive circulating tumor cells in patients with colorectal cancer

Xiao Meng Pei, Heong Ting Wong, Simon Siu Man Ng, Wing Wa Leung, Yee Ni Wong, Hin Fung Tsang, Amanda Kit Ching Chan, Yin Kwan Evelyn Wong, Allen Chi Shing Yu, Aldrin Kay Yuen Yim, William Chi Shing Cho, John Kwok Cheung Chan, Kwong Fai Wong, John M. Luk, William Chi Shing Tai, Sze Chuen Cesar Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


Background: Colorectal cancer (CRC) is the second leading cause of cancer deaths in Hong Kong. We tested the hypothesis that circulating tumor cell (CTC) analysis by ARB101 antibody could be used as a tool for CRC detection, progression, and therapy response. Research Methods: ARB101 antibody was used for investigation of CDH17 expression in formalin-fixed, paraffin-embedded (FFPE) tissue sections and circulating tumor cells (CTCs) of CRC patients. Results: Using ARB101, highest sensitivity was observed in 98/100 (98%) colorectal cancer tissue compared to 72/100 gastric cancer (72%) and 27/32 pancreatic cancer (84%). Immunoreactivity of CDH17 was significantly higher in distant metastatic (tumor-node-metastasis [TNM] stage IV) than non-distant metastatic (TNM stage I to III) CRC. ARB101 antibody also manifested the higher sensitivity than c-erbB2 (8%) and epidermal growth factor receptor (EGFR)-targeting antibodies (37%) with the significance (p < 0.0001). ARB101 positive CTCs were detected in 64/83 (77%) TNM stage I to IV CRC patients. Furthermore, ARB101 positive CTCs detected in TNM stage I to III CRC patients before and after surgical operation are statistically significant (p < 0.0001). Conclusions: CTC detection by ARB101 antibody could serve as a potential non-invasive approach for CRC detection, progression, and monitoring of treatment response.

Original languageEnglish
Pages (from-to)171-179
Number of pages9
JournalExpert Review of Molecular Diagnostics
Issue number2
Publication statusPublished - Feb 2023


  • ARB101
  • CDH17
  • circulating tumor cells
  • Colorectal cancer

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Molecular Medicine
  • Molecular Biology
  • Genetics


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