Myh6 promoter-driven Cre recombinase excises floxed DNA fragments in a subset of male germline cells.

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    • Abstract:
      Myh6 -Cre transgenic mouse line was known to express Cre recombinase only in the heart. Nevertheless, during breeding Myh6-Cre to Rosa26 fstdTom reporter (tdTom) mouse line, we observed that a significant part of their F2 tdTom/+ offspring had tdTom reporter gene universally activated. Our results show that Myh6-Cre transgenic mice have Cre recombinase activity in a subpopulation of the male germline cells, and that Myh6 gene transcripts are enriched in the interstitial Leydig cells and the undifferentiated spermatogonia stem cells. In summary, the current study confirms that the previously known "heart-specific" Myh6 promoter drives Cre expression in the testis. [Display omitted] [ABSTRACT FROM AUTHOR]
    • Abstract:
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