Gerontologist, USC Leonard Davis School of Gerontology
ScienceWorld
Longevity
Last updated: 7 October 2026
At a glance
American gerontologist and professor of gerontology, medicine and biological sciences at the University of Southern California, where he leads the Leonard Davis School of Gerontology.
His lab studies small proteins encoded in mitochondrial DNA. In 2015 it described MOTS-c in Cell Metabolism, a peptide that affects metabolism and was later linked to exercise and muscle function.
Investigates how variants in mitochondrial DNA relate to diabetes, Alzheimer’s disease and cancer, and how lifestyle — such as a Mediterranean diet — affects blood levels of these microproteins.
Earlier worked on growth hormone and IGF-1, two signalling pathways central to ageing research.
Recent studies link mitochondrial DNA variants to sex differences in inflammation and to type 2 diabetes, including through the microprotein MENTSH described in 2026.
Relevant because MOTS-c and humanin are now sold online as ‘longevity peptides’; his publications show what has actually been studied, mostly in animals and early human studies.