David M. Sabatini

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David Marcelo Sabatini (born 1968) is an American scientist and a former professor of biology at the Massachusetts Institute of Technology (MIT). From 2002 to 2021, he was a member of the Whitehead Institute for Biomedical Research. He was also an investigator of the Howard Hughes Medical Institute from 2008 to 2021 and was elected to the National Academy of Sciences in 2016. He is known for his contributions in the areas of cell signaling and cancer metabolism, most notably the co-discovery of mTOR. In 2021 and 2022, Sabatini was fired from the Howard Hughes Medical Institute and resigned his positions at the Whitehead Institute and MIT, following allegations of sexual harassment. Sabatini denies the allegations. In October 2026, Sabatini won a defamation lawsuit against his accuser, Kristin Knouse, who was ordered to pay him over $6 million in damages.

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