Journal: EBioMedicine
Article Title: Prognostic Impact of Circulating Tumor Cell Detected Using a Novel Fluidic Cell Microarray Chip System in Patients with Breast Cancer
doi: 10.1016/j.ebiom.2016.07.027
Figure Lengend Snippet: Comparison of the CTC counts detected in patients with breast cancer using the FCMC system and the CellSearch system, and progression free survival in patients in whom CTC were detected or not detected using the FCMC system or the CellSearch system. (A) The CTC counts of twenty-two patients with breast cancer were evaluated. For comparison with the CellSearch system, the results of the FCMC system from 1.6 mL blood were normalized to a value of 7.5 mL. The number of CTC counts detected using the FCMC system was statistically higher than that using the CellSearch system ( p = 0.00037, Wilcoxon signed rank test). (B) Typical immunofluorescence stained CTC images of a patient with breast cancer. CTC was defined as cytokeratin (CK) positive, CD45 negative and Hoechst 33342 (nucleus) positive. Scale bar, 20 μm. (C,D) Kaplan-Meier curves of progression free survival (PFS) in patients in whom CTC were detected (CTC +) or not detected (CTC −) using (C) the FCMC system or (D) the CellSearch system are shown. CTC + is defined as detected CTC counts that are above the threshold level of each system (FCMC, 3 CTC/1.6 mL; CellSearch, 1 CTC/7.5 mL). The log-rank test of PFS showed significant differences according to CTC detection in both systems (FCMC: p = 0.000244, CellSearch: p = 0.0082). The median PFS of CTC + patients (40 days; 95% CI, 0 to N.E., not estimable) and CTC − patients (194 days; 95% CI, 173 to N.E.) as assessed using the FCMC system is shown in (C). The median PFS of CTC + patients (97 days; 95% CI, 0 to 173) and CTC − patients (325 days; 95% CI, 33 to N.E.) as assessed using the CellSearch system is shown in (D). The hazard ratio for PFS was 11.31 (95% confidence interval [CI], 2.245 to 57.0; p = 0.003284) for CTC + patients as compared with CTC − patients using the FCMC system, and was 4.229 (95% CI, 1.31 to 13.66; p = 0.01591) for CTC + patients as compared with CTC − patients using the CellSearch system. Patients remained in the study unless they met a criterion for disease progression.
Article Snippet: We also analyzed the CTC count per 1.6 mL of peripheral blood from each of 20 healthy donors in Konica Minolta, Inc. (Tokyo, Japan) using the FCMC system, in order to determine a threshold value for the CTC counts using this system.
Techniques: Comparison, Immunofluorescence, Staining, Biomarker Discovery