Autologous cell lines from circulating colon cancer cells captured from sequential liquid biopsies as model to study therapy-driven tumor changes.
Alexandra SolerLaure CayrefourcqThibault MazardAnna BabayanPierre-Jean LamySaid AssouEric AssenatKlaus PantelCatherine Alix-PanabièresPublished in: Scientific reports (2018)
Circulating tumor cells (CTCs) are important clinical indicators for prognosis and treatment efficacy. However, CTC investigation is hampered by their low number, making the establishment of permanent CTC lines very challenging. We derived and characterized nine CTC lines using blood samples from a patient with metastatic colorectal cancer collected before and after chemotherapy and targeted therapy, and during cancer progression. These cell lines displayed an intermediate epithelial/mesenchymal phenotype, stem-cell like characteristics, angiogenesis potential, an osteomimetic signature and the capacity to escape from the immune system. Moreover, they showed changes in mRNA and protein expression (e.g., DEFA6, ABCB1 and GAL), whereas analysis of chromosomal copy number aberrations revealed no significant variation over time. These data indicate that although CTC lines derived from sequential blood samples during therapy have common traits, treatment-resistant CTC clones with distinct phenotypic characteristics are selected over time.
Keyphrases
- circulating tumor cells
- copy number
- mitochondrial dna
- stem cells
- genome wide
- circulating tumor
- metastatic colorectal cancer
- dna methylation
- bone marrow
- papillary thyroid
- squamous cell carcinoma
- electronic health record
- risk assessment
- gene expression
- case report
- single cell
- big data
- human health
- climate change
- young adults
- vascular endothelial growth factor
- mesenchymal stem cells
- machine learning
- lymph node metastasis
- squamous cell
- binding protein
- platelet rich plasma