Mice with Targeted Disruption of the Dio2 Gene Have Cold-Induced Overexpression of the Uncoupling Protein 1 Gene but Fail to Increase Brown Adipose Tissue Lipogenesis and Adaptive Thermogenesis.
The Dio2 gene encodes the type 2 deiodinase (D2) that activates thyroxine (T4) to 3,3 ,5-triiodothyronine (T3), the disruption of which (Dio2 / ) results in brown adipose tissue (BAT)-specific hypothyroidism in an oth- erwise euthyroid animal. In the present studies, cold exposure increased Dio2 / BAT sympathetic stimula- tion 10-fold (normal 4-fold); as a […]