Abstract:
:We evaluated the changes in CTC count and CTC-associated miRNAs during the course of chemotherapy in patients with metastatic colorectal cancer. Blood samples were collected from 9 metastatic colorectal cancer patients prior to chemotherapy and at every other chemotherapy session during the course of treatment. CTCs were isolated and enumerated using a size-exclusion method (CellSievo, Singapore). CTC-associated miRNAs were isolated using a paper-based, partitioning method, and analyzed using reverse transcription quantitative real-time PCR (MiRXES, Singapore). CTC count trends generally correlated with disease progression defined by radiological measurements and trends in carcinoembryonic antigen (CEA) levels; hence CTC counts may be useful in cases where CEA is not elevated. CTC-associated miRNAs identified were miR-15b, miR-16, miR-19a, miR-21, miR-25, miR-30d, miR-126, miR-185, miR-221, miR-222, and miR-324-5p. The expression of CTC-associated miRNAs did not appear to correlate with CTC count and exhibited inter-individual heterogeneity. This pilot study suggests that analysis of CTC changes during the course of treatment may be useful in monitoring response to therapy in metastatic colorectal cancer.
journal_name
Cancer Lettjournal_title
Cancer lettersauthors
Tan K,Leong SM,Kee Z,Caramat PV,Teo J,Blanco MVM,Koay ESC,Cheong WK,Soh TI,Yong WP,Pang Adoi
10.1016/j.canlet.2018.02.039subject
Has Abstractpub_date
2018-06-01 00:00:00pages
1-8eissn
0304-3835issn
1872-7980pii
S0304-3835(18)30180-0journal_volume
423pub_type
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