Statement of Retraction. Loss-of-Function Mutation in Toll-Like Receptor 4 Prevents Diet-Induced Obesity and Insulin Resistance. Diabetes 2007;56:1986–1998. DOI: 10.2337/db06-1595 DOI: 10.2337/db16-rt04a Daniela M.L. Tsukumo, Marco A. Carvalho-Filho, José B.C. Carvalheira, Patrícia O. Prada, Sandro M. Hirabara, André A. Schenka, Eliana P. Araújo, José Vassallo, Rui Curi, Lício A. Velloso, and Mario J.A. Saad The above-cited article has been retracted by the American Diabetes Association, the publisher of Diabetes. This article was previously the subject of an expression of concern in the March 2015 issue of the journal (Diabetes 2015;64:1068–1070. DOI: 10.2337/db15-ec03).