Circulating stem cell–like epithelial cell adhesion molecule–positive tumor cells indicate poor prognosis of hepatocellular carcinoma after curative resection1. Issue 4 (4th March 2013)

• Record Type: Journal Article
• Authors: Sun, Yun‐Fan; Xu, Yang; Yang, Xin‐Rong; Guo, Wei; Zhang, Xin; Qiu, Shuang‐Jian; Shi, Ruo‐Yu; Hu, Bo; Zhou, Jian; Fan, Jia
• Is Part Of: Hepatology. Volume 57:Issue 4(2013:Apr.)
• Page Start: 1458
• Page End: 1468
• Publication Date: 2013-03-04
• Subjects: Heart -- Diseases -- Nursing -- Periodicals; Lungs -- Diseases -- Nursing -- Periodicals; Intensive care nursing -- Periodicals; Foie -- Maladies -- Périodiques; 616.362
• DOI: 10.1002/hep.26151
• Languages: English
• ISSNs: 0270-9139

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Epithelial cell adhesion molecule–positive (EpCAM<sup>+</sup>) hepatocellular carcinoma (HCC) cells may constitute a tumor‐initiating subpopulation in tumorigenic cell lines and HCC specimens. In the present study, EpCAM<sup>+</sup> circulating tumor cells (CTCs) were identified prospectively in HCC patients undergoing curative resection, and the prognostic significance and their stem cell–like characteristics were investigated further. Blood samples from 123 HCC patients were tested prior to resection and 1 month thereafter. CTCs were present in 66.67% of patients, and the cell count measured in 7.5 mL of blood (CTC<sup>7.5</sup>) ranged between 1 and 34. Fifty‐one patients had CTC<sup>7.5</sup> of ≥2 preoperatively, and these patients developed tumor recurrence earlier than those with CTC<sup>7.5</sup> of <2 CTCs (<italic>P</italic> < 0.001). A preoperative CTC<sup>7.5</sup> of ≥2 was an independent prognostic factor for tumor recurrence (<italic>P</italic> < 0.001). Its prognostic significance also applied to patients with alpha‐fetoprotein (AFP) levels of ≤400 ng/mL or subgroups with low recurrence risk (all <italic>P</italic> < 0.05). A significant decrease of CTC‐positive rates (66.67% to 28.15%, <italic>P</italic> < 0.05) and CTC<sup>7.5</sup> values (2.60 ± 0.43 to 1.00 ± 0.36, <italic>P</italic> < 0.05) was observed 1 month after resection. Patients with consistent CTC<sup>7.5</sup> <2 had lower recurrence rates than those with values consistently ≥2 (15.5% versus 87.50%, <italic>P</italic> < 0.001). EpCAM<sup>+</sup> CTCs displayed cancer stem cell biomarkers (CD133 and ABCG2), epithelial‐mesenchymal transition, Wnt pathway activation, high tumorigenic potential, and low apoptotic propensity. <italic>Conclusion</italic>: Stem cell–like phenotypes are observed in EpCAM<sup>+</sup> CTCs, and a preoperative CTC<sup>7.5</sup> of ≥2 is a novel predictor for tumor recurrence in HCC patients after surgery, especially in patient subgroups with AFP levels of ≤400 ng/mL or low tumor recurrence risk. EpCAM<sup>+</sup> CTCs may serve as a real‐time parameter for monitoring treatment response and a therapeutic target in HCC recurrence. (H<sc>EPATOLOGY</sc> 2013)</p> </abstract>