1. Circulating tumor cells criteria (CyCAR) versus standard RECIST criteria for treatment response assessment in metastatic colorectal cancer patients
- Author
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Alba Rodríguez-Martínez, M. Jose Serrano, Diego de Miguel-Pérez, Hugh Ilyine, Miguel Delgado-Ramirez, Jose Exposito-Hernandez, Francisco G. Ortega, Jose L. Garcia-Puche, Mayte Delgado-Ureña, M. Carmen Garrido-Navas, and José A. Lorente
- Subjects
0301 basic medicine ,Oncology ,Male ,Multivariate analysis ,Organoplatinum Compounds ,Colorectal cancer ,Leucovorin ,lcsh:Medicine ,0302 clinical medicine ,Circulating tumor cell ,Antineoplastic Combined Chemotherapy Protocols ,Neoplasm Metastasis ,CyCAR ,Metastatic colorectal cancer ,General Medicine ,Middle Aged ,Reference Standards ,Neoplastic Cells, Circulating ,Prognosis ,Bevacizumab ,Treatment Outcome ,Response Evaluation Criteria in Solid Tumors ,030220 oncology & carcinogenesis ,Female ,Fluorouracil ,Colorectal Neoplasms ,After treatment ,medicine.drug ,medicine.medical_specialty ,Treatment response ,Immunomagnetic separation ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,Internal medicine ,Cell Line, Tumor ,medicine ,Humans ,Proportional Hazards Models ,business.industry ,Research ,lcsh:R ,Circulating tumor cells ,medicine.disease ,030104 developmental biology ,Receptors, Vascular Endothelial Growth Factor ,RECIST ,Multivariate Analysis ,business ,Follow-Up Studies - Abstract
The use of circulating tumor cells (CTCs) as indicators of treatment response in metastatic colorectal cancer (mCRC) needs to be clarified. The objective of this study is to compare the Response Evaluation Criteria in Solid Tumors (RECIST) with the Cytologic Criteria Assessing Response (CyCAR), based on the presence and phenotypic characterization of CTCs, as indicators of FOLFOX–bevacizumab treatment response. We observed a decrease of CTCs (42.8 vs. 18.2%) and VEGFR positivity (69.7% vs. 41.7%) after treatment. According to RECIST, 6.45% of the patients did not show any clinical benefit, whereas 93.55% patients showed a favorable response at 12 weeks. According to CyCAR, 29% had a non-favorable response and 71% patients did not. No significant differences were found between the response assessment by RECIST and CyCAR at 12 or 24 weeks. However, in the multivariate analysis, RECIST at 12 weeks and CyCAR at 24 weeks were independent prognostic factors for OS (HR: 0.1, 95% CI 0.02–0.58 and HR: 0.35, 95% CI 0.12–0.99 respectively). CyCAR results were comparable to RECIST in evaluating the response in mCRC and can be used as an alternative when the limitation of RECIST requires additional response analysis techniques., This work was supported by Roche Spain and a Ph.D. grant from the University of Granada.
- Published
- 2018