Abstract

On September 3, 2022, Retraction Watch reported that four articles published in the Proceedings of the National Academy of Sciences (PNAS) had been retracted on the same day (02 September 2022). More notable is that all four articles were co-authored by a preeminent researcher on the molecular mechanisms of oxygen regulation – Gregg Semenza. Semenza shared The Nobel Prize in Physiology or Medicine 2019 with William Kaelin and Peter Ratcliffe for “their discoveries of how cells sense and adapt to oxygen availability.”