We wish to retract the article titled “Hypoxia-Inducible Factor (HIF) 1α Accumulation and HIF Target Gene Expression Are Impaired after Induction of Endotoxin Tolerance” by Stilla Frede, Christian Stockmann, Sandra Winning, Patricia Freitag, and Joachim Fandrey, The Journal of Immunology, 2009, 182: 6470–6476.

During preparation of a review article and the ensuing discussion of previous work, we became aware that the gel photograph from figure 1 in the above cited 2009 article was identical to a previously published gel photograph from figure 4A in Biochemical Journal, 2006, 396: 517–527.

Although these articles were published in different years, many of the experiments were performed at the same time, which is our only explanation for the duplication of the image. All of the authors concur with this retraction and deeply regret this mistake.

Stilla Frede

Patricia Freitag

University of Bonn

Bonn, Germany

Christian Stockmann

Paris - Centre de Recherche Cardiovasculaire à l'HEGP Inserm - UMR 970

Paris, France

Sandra Winning

Joachim Fandrey

University of Duisburg-Essen

Duisburg, Germany