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An Ivy League university is blaming an “error” for the brief disappearance of the doctoral dissertation of a former Twitter employee whose writings on gay dating apps drew public scorn from Elon Musk.

As Fox News first reported, on Saturday the PhD thesis by Yoel Roth, who until November had been Twitter’s head of trust and safety, seemed to have been removed from the University of Pennsylvania’s ScholarlyCommons website. 

A Penn official told Fox: 

My laboratory at Boston Children’s Hospital and Harvard Medical School studies genetic diseases that affect the skeletal system.  We became interested in the protein osteocalcin after Gerard Karsenty at Columbia University reported in several papers using knockout mice – mice lacking the genes which produce osteocalcin – that osteocalcin is a bone-derived hormone that affects glucose metabolism, insulin production, male fertility, muscle mass, and cognition.  If osteocalcin functions similarly in humans, then osteocalcin becomes an exciting and clinically important protein. 

To independently confirm these findings, we created our own osteocalcin knockout mouse strain. We examined glucose metabolism and male fertility in our mice and found none of the effects reported by Karsenty and colleagues; we reported our findings in May 2020.  A group in Japan created a third osteocalcin knockout mouse strain which also failed to confirm Karsenty and colleagues’ findings.  

In earlier years my laboratory also could not independently confirm other results reported by the Karsenty group: a paper I co-authored in 2011 found no evidence of the Wnt co-receptor LRP5 affecting blood serotonin levels, contrary to what Karsenty’s lab published.

This week, Nature reported on two institutional reports that found scientists in Carlo Croce’s cancer research lab at The Ohio State University had committed research misconduct including plagiarism and data falsification. 

Another institutional investigation directed at Croce did not find he committed research misconduct but did identify problems with how he managed his lab, according to Nature. 

It’s the latest chapter in a years-long saga of mounting numbers of corrections and retractions for Croce, a 2017 article in the New York Times that brought him to widespread attention, a scientist sleuth trying to clean up the literature, and lots and lots of lawyers, some of whom may have a claim  on Croce’s house after he didn’t pay his legal bills.