Top Mayo researcher is out amid accusations of bullying

Jan van Deursen, PhD, a well-known anti-aging and cancer researcher, has left Mayo Clinic after more than 20 years amid accusations that he bullied colleagues and created an unhealthy work environment, according to the Post Bulletin

A German science blog published employee accounts of Dr. van Deursen's alleged misconduct in June. Mayo Clinic had been looking into the researcher's behavior since early 2020, and in June confirmed it was "in the process of responsibly concluding the research activities associated with Dr. van Deursen's laboratory." 

That laboratory has a team of 10 to 15 researchers heading up National Institutes of Health-funded work involving cancer treatments and anti-aging processes. Dr. van Deursen currently has five NIH grants. 

On July 24, Dr. van Duersen filed "cease and desist" documents in Germany against the author of the science blog, and those documents state that he retired from Mayo on July 24. A Mayo spokesperson confirmed with the Rochester, Minn.-based news publication that the system no longer employs Dr. van Deursen. His bio is no longer available on the Mayo Clinic website. 

Dr. van Deursen held several leadership roles in his 20 years at Mayo, including chairman of biochemistry and molecular biology. His wife continues to work in the lab.

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