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Transgenic mice with hematopoietic and lymphoid specific expression of Cre.

Authors:
de Boer J, Williams A, Skavdis G, Harker N, Coles M, Tolaini M, Norton T, Williams K, Roderick K, Potocnik AJ, Kioussis D
Affiliation:
Journal:
European journal of immunology

Abstract

Bacteriophage P1 Cre/loxP based systems can be used to manipulate the genomes ofmice in vivo and in vitro, allowing the generation of tissue-specific conditional mutants. We have generated mouse lines expressing Cre recombinase in hematopoietic tissues using the vav regulatory elements, or in lymphoid cells using the hCD2 promoter and locus control region (LCR). The R26R-EYFP Cre reporter mouse line was used to determine the pattern of Cre expression in each line and enabled the assessment of Cre activity at a single-cell level. Analysis showed that the vav promoter elements were able to direct Cre-mediated recombination in all cells of the hematopoietic system. The hCD2 promoter and LCR on the other hand were able to drive Cre-mediated recombination only in T cells and B cells, but not in other hematopoietic cell types. Furthermore, in the appropriate tissues, deletion of the floxed target was complete in all cells, thereby excluding the possibility of variegated expression of the Cre transgene. Both of these Cre-transgenic lines will be useful in generating tissue-specific gene deletions within all the cells of hematopoietic or lymphoid tissues.

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