Humanin overexpression extended C. elegans lifespan via daf-16/Foxo, and in mice, the humanin analog HNG improved metabolic health and reduced inflammation, while humanin levels correlated with exceptional longevity in humans.
Cross-specieshumanin linked to longevity in worms, mice, naked mole-rats, and human centenarian families
What the researchers found
Humanin overexpression extended C. elegans lifespan dependent on daf-16/Foxo. HNG treatment improved metabolic healthspan and reduced inflammation in middle-aged mice. Humanin levels were elevated in children of centenarians and stable in naked mole-rats but declined with age in other species.
Why it matters
This is the first demonstration that a mitochondrial-derived peptide regulates lifespan and healthspan across species, from worms to humans. The correlation with exceptional human longevity makes humanin a compelling target for anti-aging research.
The numbers in context
Humanin overexpression significantly extended worm lifespan (FOXO-dependent); transgenic mice showed improved healthspan phenotypes.
How the study worked
C. elegans lifespan studies with humanin overexpression. Humanin transgenic mice phenotyping. Middle-aged mice treated twice weekly with HNG analog. Human studies measuring circulating humanin in centenarians' children, Alzheimer's patients, and MELAS patients. Naked mole-rat humanin level profiling.
Who was studied
C. elegans (humanin overexpression) and transgenic humanin mice
What this study cannot tell us
Worm and mouse lifespan studies may not directly translate to human longevity. Observational human data (centenarian children) shows correlation, not causation. Optimal dosing, timing, and safety of humanin supplementation in humans are unknown.
How to read the evidence
Multi-species evidence from worms through humans with consistent direction. Mechanistic studies in model organisms complemented by observational human data. Translational potential is high but unproven.
When this study was published
Published in 2020. Mitochondrial-derived peptide research has expanded significantly since, with humanin analogs being explored for various age-related conditions.
The bigger picture
The discovery of mitochondrial-derived peptides has opened a new chapter in aging biology. Humanin's conservation across species and its association with exceptional longevity in humans suggests that mitochondrial health is a central determinant of lifespan — and that supplementing MDPs could be a viable anti-aging strategy.
Questions still open
- Could humanin or HNG supplementation slow aging in humans?
- Why do naked mole-rats maintain stable humanin levels when other species show decline?
- Is low humanin a cause or consequence of diseases like Alzheimer's and MELAS?
Common questions
What are mitochondrial-derived peptides?
Why are naked mole-rats relevant to aging research?
Read the original research
The mitochondrial derived peptide humanin is a regulator of lifespan and healthspan.
Aging, 12(12), 11185-11199
Citation
Yen, Kelvin; Mehta, Hemal H; Kim, Su-Jeong; Lue, YanHe; Hoang, James; Guerrero, Noel; Port, Jenna; Bi, Qiuli; Navarrete, Gerardo; Brandhorst, Sebastian; Lewis, Kaitlyn Noel; Wan, Junxiang; Swerdloff, Ronald; Mattison, Julie A; Buffenstein, Rochelle; Breton, Carrie V; Wang, Christina; Longo, Valter; Atzmon, Gil; Wallace, Douglas; Barzilai, Nir; Cohen, Pinchas. (2020). The mitochondrial derived peptide humanin is a regulator of lifespan and healthspan.. Aging, 12(12), 11185-11199. https://doi.org/10.18632/aging.103534