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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Early detection of poor outcome in patients with metastatic colorectal cancer: tumor kinetics evaluated by circulating tumor cells

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Souza e Silva, Virgilio ; Domingos Chinen, Ludmilla Thome ; Abdallah, Emne A. ; Damascena, Aline ; Paludo, Jociana ; Chojniak, Rubens ; Abbade Dettino, Aldo Lourenco ; Lopes de Mello, Celso Abdon ; Alves, Vanessa S. ; Fanelli, Marcello F.
Total Authors: 10
Document type: Journal article
Source: ONCOTARGETS AND THERAPY; v. 9, p. 7503-7513, 2016.
Web of Science Citations: 3

Background: Colorectal cancer (CRC) is the third most prevalent cancer worldwide. New prognostic markers are needed to identify patients with poorer prognosis, and circulating tumor cells (CTCs) seem to be promising to accomplish this. Patients and methods: A prospective study was conducted by blood collection from patients with metastatic CRC (mCRC), three times, every 2 months in conjunction with image examinations for evaluation of therapeutic response. CTC isolation and counting were performed by Isolation by Size of Epithelial Tumor Cells (ISET). Results: A total of 54 patients with mCRC with a mean age of 57.3 years (31-82 years) were included. Among all patients, 60% (n=32) were carriers of wild-type KRAS (WT KRAS) tumors and 90% of them (n=29) were exposed to monoclonal antibodies along with systemic treatment. Evaluating CTC kinetics, when we compared the baseline (pretreatment) CTC level (CTC1) with the level at first follow-up (CTC2), we observed that CTC1-positive patients (CTCs above the median), who became negative (CTCs below the median) had a favorable evolution (n=14), with a median progression-free survival (PFS) of 14.7 months. This was higher than that for patients with an unfavorable evolution (CTC1 - that became CTC2+; n=13, 6.9 months; P=0.06). Patients with WT KRAS with favorable kinetics had higher PFS (14.7 months) in comparison to those with WT KRAS with unfavorable kinetics (9.4 months; P=0.02). Moreover, patients whose imaging studies showed radiological progression had an increased quantification of CTCs at CTC2 compared to those without progression (P=0.04). Conclusion: This study made possible the presentation of ISET as a feasible tool for evaluating CTC kinetics in patients with mCRC, which can be promising in their clinical evaluation. (AU)

FAPESP's process: 13/21730-7 - Detection of Circulating Tumor Cells and their correlation with clinical evolution in patients with colorectal cancer
Grantee:Emne Ali Abdallah
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 12/01273-8 - Detection of circulating tumor cells and their correlation with tumor clinical evolution
Grantee:Fernando Augusto Soares
Support Opportunities: Regular Research Grants