Characterization of Ucp1-iCre Knockin Mice Reveals the Recombination Activity in Male Germ Cells

Ucp1 promoter-driven Cre transgenic mice are useful in the manipulation of gene expression specifically in thermogenic adipose tissues. The widely used Ucp1-Cre mouse line (Ucp1-Cre Evdr ), which was generated using the bacterial artificial chromosome (BAC) strategy, exhibits major brown and white fat transcriptomic dysregulation and ectopic activity beyond adipose tissues. Here, we comprehensively validate Ucp1-iCre knockin mice, which serve as another optional model besides Ucp1-Cre Evdr mice for specific genetic manipulation in thermogenic tissue.