Circulating Tumor Cells: A Review of Non–EpCAM-Based Approaches for Cell Enrichment and Isolation

Author:

Gabriel Marta Tellez12,Calleja Lidia Rodriguez12,Chalopin Antoine123,Ory Benjamin12,Heymann Dominique1234

Affiliation:

1. INSERM, UMR 957, Equipe LIGUE Nationale Contre le Cancer 2012, Nantes, France

2. Université de Nantes, Nantes Atlantique Universités, Pathophysiology of Bone Resorption and Therapy of Primary Bone Tumours, Nantes, France

3. CHU de Nantes, Nantes, France

4. Department of Oncology and Metabolism, University of Sheffield, Sheffield, UK

Abstract

Abstract BACKGROUND Circulating tumor cells (CTCs) are biomarkers for noninvasively measuring the evolution of tumor genotypes during treatment and disease progression. Recent technical progress has made it possible to detect and characterize CTCs at the single-cell level in blood. CONTENT Most current methods are based on epithelial cell adhesion molecule (EpCAM) detection, but numerous studies have demonstrated that EpCAM is not a universal marker for CTC detection because it fails to detect both carcinoma cells that undergo epithelial-mesenchymal transition (EMT) and CTCs of mesenchymal origin. Moreover, EpCAM expression has been found in patients with benign diseases. A large proportion of the current studies and reviews about CTCs describe EpCAM-based methods, but there is evidence that not all tumor cells can be detected using this marker. Here we describe the most recent EpCAM-independent methods for enriching, isolating, and characterizing CTCs on the basis of physical and biological characteristics and point out the main advantages and disadvantages of these methods. SUMMARY CTCs offer an opportunity to obtain key biological information required for the development of personalized medicine. However, there is no universal marker of these cells. To strengthen the clinical utility of CTCs, it is important to improve existing technologies and develop new, non–EpCAM-based systems to enrich and isolate CTCs.

Funder

Seventh Framework Programme

Fondation de France

Publisher

Oxford University Press (OUP)

Subject

Biochemistry, medical,Clinical Biochemistry

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