Journal
EUROPEAN JOURNAL OF IMMUNOLOGY
Volume 50, Issue 3, Pages 338-341Publisher
WILEY
DOI: 10.1002/eji.202048546
Keywords
fate mapping; microglia; CreER
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Funding
- Swiss National Science Foundation [BSGI0 155832]
- ERC Consolidator Grant [819229]
- European Research Council (ERC) [819229] Funding Source: European Research Council (ERC)
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Cre and CreER mouse strains are powerful tools that have proven invaluable for investigating the function of genes and for the fate-mapping of cell populations. The fidelity of these systems however are becoming more and more contested. In this issue of the European Journal of Immunology, Van Hove et al. and Chappell-Maor et al. carefully dissect the cellular specificities of two commonly used CreER mouse strains for the study of CNS macrophages; Cx3cr1(CreER) and Sall1(CreER). Both studies elegantly highlight that CreER strains, as well as the floxed allele to be targeted, need to be carefully selected and properly characterized in order to ensure reproducible and robust data and interpretations. These studies are a cautionary tale for this technology, but also highlight that we must continuously question and improve our experimental approaches.
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