BACKGROUND: We directly compared CTC detection rates and prognostic significance, using three different methods in patients with breast cancer (BC). METHODS: Early (n=200) and metastatic (n=164) patients were evaluated before initiating adjuvant or first-line chemotherapy, using the CellSearchTM System, an RT-qPCR for CK-19 mRNA detection and by double immunofluorescence (IF) microscopy using A45-B/B3 and CD45 antibodies. RESULTS: Using the CellSearchTM System, 37% and 16.5% of early BC patients were CTC-positive (at ≥1 and ≥2 CTCs/23 ml of blood), 18.0% by RT-qPCR and 16.9% by IF; no agreement was observed between methods. By the CellSearchTM 34.8% and 53.7% (at≥ 5 and ≥ 2 CTCs/7.5 ml) of metastatic patients were CTC-positive, 37.8% by RT-qPCR and 28.5% by IF. A significant agreement existed only between the CellSearchTM and RT-qPCR. In 60.8% of cases, differential EpCAM and CK-19 expression on CTCs by IF could explain the discrepancies between the CellSearchTM and RT-qPCR. CTC-positivity by either method was associated with decreased overall survival in metastatic patients. CONCLUSION: A significant concordance was observed between the CellSearchTM and RT-qPCR in metastatic but not in early BC. Discordant results could be explained in part by CTC heterogeneity. CTC detection by all methods evaluated had prognostic relevance in metastatic patients.
BACKGROUND: We directly compared CTC detection rates and prognostic significance, using three different methods in patients with breast cancer (BC). METHODS: Early (n=200) and metastatic (n=164) patients were evaluated before initiating adjuvant or first-line chemotherapy, using the CellSearchTM System, an RT-qPCR for CK-19 mRNA detection and by double immunofluorescence (IF) microscopy using A45-B/B3 and CD45 antibodies. RESULTS: Using the CellSearchTM System, 37% and 16.5% of early BC patients were CTC-positive (at ≥1 and ≥2 CTCs/23 ml of blood), 18.0% by RT-qPCR and 16.9% by IF; no agreement was observed between methods. By the CellSearchTM 34.8% and 53.7% (at≥ 5 and ≥ 2 CTCs/7.5 ml) of metastatic patients were CTC-positive, 37.8% by RT-qPCR and 28.5% by IF. A significant agreement existed only between the CellSearchTM and RT-qPCR. In 60.8% of cases, differential EpCAM and CK-19 expression on CTCs by IF could explain the discrepancies between the CellSearchTM and RT-qPCR. CTC-positivity by either method was associated with decreased overall survival in metastatic patients. CONCLUSION: A significant concordance was observed between the CellSearchTM and RT-qPCR in metastatic but not in early BC. Discordant results could be explained in part by CTC heterogeneity. CTC detection by all methods evaluated had prognostic relevance in metastatic patients.
Authors: Abeer A Bahnassy; Magdy M Saber; Mohamed G Mahmoud; Mona S Abdellateif; Mohamed Abd El-Mooti Samra; Rafaat M Abd El-Fatah; Abdel-Rahman N Zekri; Salem E Salem Journal: Mol Biol Rep Date: 2018-09-18 Impact factor: 2.316
Authors: Jason Chibuk; Andi Flory; Kristina M Kruglyak; Nicole Leibman; Alexis Nahama; Nilesh Dharajiya; Dirk van den Boom; Taylor J Jensen; Jeffrey S Friedman; M Richard Shen; Francisco Clemente-Vicario; Ilya Chorny; John A Tynan; Katherine M Lytle; Lauren E Holtvoigt; Muhammed Murtaza; Luis A Diaz; Dana W Y Tsui; Daniel S Grosu Journal: Front Vet Sci Date: 2021-03-23
Authors: Constantin Sajdik; Eva Schuster; Barbara Holzer; Michael Krainer; Christine Deutschmann; Stefan Peter; Maximilian Marhold; Robert Zeillinger; Eva Obermayr Journal: Breast Cancer Res Treat Date: 2022-09-08 Impact factor: 4.624
Authors: Maria A Papadaki; Afroditi I Sotiriou; Christina Vasilopoulou; Maria Filika; Despoina Aggouraki; Panormitis G Tsoulfas; Christina A Apostolopoulou; Konstantinos Rounis; Dimitrios Mavroudis; Sofia Agelaki Journal: Cancers (Basel) Date: 2020-06-12 Impact factor: 6.639