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Characterisation of circulating tumour cell phenotypes identifies a partial-EMT sub-population for clinical stratification of pancreatic cancer
Journal article   Peer reviewed

Characterisation of circulating tumour cell phenotypes identifies a partial-EMT sub-population for clinical stratification of pancreatic cancer

Alexander Semaan, Vincent Bernard, Dong U Kim, Jaewon J Lee, Jonathan Huang, Nabiollah Kamyabi, Bret M Stephens, Wei Qiao, Gauri R Varadhachary, Matthew H Katz, …
British journal of cancer, Vol.124(12), pp.1970-1977
06/08/2021
DOI: 10.1038/s41416-021-01350-9
PMID: 33785875

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Abstract

Limited accessibility of the tumour precludes longitudinal characterisation for therapy guidance in pancreatic ductal adenocarcinoma (PDAC). We utilised dielectrophoresis-field flow fractionation (DEP-FFF) to isolate circulating tumour cells (CTCs) in 272 blood draws from 74 PDAC patients (41 localised, 33 metastatic) to non-invasively monitor disease progression. Analysis using multiplex imaging flow cytometry revealed four distinct sub-populations of CTCs: epithelial (E-CTC), mesenchymal (M-CTC), partial epithelial-mesenchymal transition (pEMT-CTC) and stem cell-like (SC-CTC). Overall, CTC detection rate was 76.8% (209/272 draws) and total CTC counts did not correlate with any clinicopathological variables. However, the proportion of pEMT-CTCs (prop-pEMT) was correlated with advanced disease, worse progression-free and overall survival in all patients, and earlier recurrence after resection. Our results underscore the importance of immunophenotyping and quantifying specific CTC sub-populations in PDAC.
Adult Aged Aged, 80 and over Biomarkers, Pharmacological - analysis Biomarkers, Pharmacological - blood Biomarkers, Tumor - analysis Biomarkers, Tumor - blood Carcinoma, Pancreatic Ductal - blood Carcinoma, Pancreatic Ductal - diagnosis Carcinoma, Pancreatic Ductal - pathology Cells, Cultured Disease Progression Drug Monitoring - methods Epithelial-Mesenchymal Transition - physiology Female Humans Immunophenotyping Longitudinal Studies Male Middle Aged Neoplasm Staging Neoplastic Cells, Circulating - classification Neoplastic Cells, Circulating - pathology Pancreatic Neoplasms - blood Pancreatic Neoplasms - diagnosis Pancreatic Neoplasms - pathology Phenotype Predictive Value of Tests Prognosis

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