ArticleAdipocyte2026
A non-invasive method for light-inducible knockout across all cell types in mouse subcutaneous adipose tissue.
Article in Adipocyte, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Cre recombination is a widely used technique for mechanistic insights in physiology and disease. However, available constitutive and inducible Cre systems present challenges that can be prohibitive for some study designs. For example, Cre expression can result in cell types targeted across numerous tissues and organs, or when a gene is expressed across multiple cell types in a tissue, Cre-Lox restricted knockout will not enable ablation across an entire tissue or organ. Photoactivatable Cre (PA-Cre) systems enable temporally and spatially restricted gene expression control in delimited anatomical regions, typically requiring a micro-LED or fibre optic implantation. Here, we report as proof-of-concept the effective knockout of BDNF in subcutaneous adipose tissue after PA-Cre activation through external blue light illumination in awake, freely moving mice. We demonstrated that for mice with black fur, shaving can be used to anatomically limit PA-Cre activation. BDNF protein expression was decreased by 87% in the inguinal scWAT after blue light exposure, with no effect observed in the perigonadal (deep) or axillary subcutaneous (non-shaved) adipose tissues. We propose blue light induction of PA-Cre as safe and effective to study adipose tissue physiology and pathology across models. Considerations for applying this tool to future studies are also presented.
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