Ontology type: schema:ScholarlyArticle Open Access: True
2018-12
AUTHORSMatthieu Le Gallo, Thibault de la Motte Rouge, Amanda Poissonnier, Vincent Lavoué, Patrick Tas, Jean Leveque, Florence Godey, Patrick Legembre
ABSTRACTOBJECTIVE: The use of novel methods to characterize living tumor cells relies on well-conceived biobanks. Herein, we raised the question of whether the composition of fresh and freeze/thawed dissociated tumor samples is comparable in terms of quantitative and qualitative profiling. RESULTS: Breast cancer is a heterogeneous disease, encompassing luminal A and B, basal/triple-negative breast cancer (TNBC), and ERBB2-like tumors. We examined living cells dissociated from TNBC and found that a classical freeze/thaw protocol leads to a marked reduction in the number of CD45-CD44LowCD24Low tumor cells. This, in turn, changed the percentage of tumor cells with certain CD44/CD24 expression patterns and changed the percentage of tumor-infiltrating immune cells. These cryopreservation-driven alterations in cellular phenotype make it impossible to compare fresh and frozen samples from the same patient directly. Moreover, the freeze/thaw process changed the transcriptomic signatures of triple-negative cancer stem cells in such a manner that hierarchical clustering no longer ranked them according to expected inter-individual differences. Overall, this study suggests that all analyses of living tumor cells should be conducted only using freshly dissociated tumors if we are to generate a robust scoring system for prognostic/predictive markers. More... »
PAGES401
http://scigraph.springernature.com/pub.10.1186/s13104-018-3504-5
DOIhttp://dx.doi.org/10.1186/s13104-018-3504-5
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