Menin restoration reverses aging signs in mice — SkimNews
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- Lige Leng of Xiamen University led a March 2023 PLOS Biology study showing that Menin levels fall with age in neurons of the ventromedial hypothalamus, a brain region coordinating metabolism and aging-related signaling.
- Mice engineered to lose Menin early developed hypothalamic inflammation plus lower bone mass, thinner skin, cognitive decline, and a modestly shorter lifespan, supporting Menin loss as a driver rather than just a marker of aging.
- Delivering the Menin gene into the hypothalamus of 20-month-old mice improved skin thickness, bone mass, learning, cognition, and balance within 30 days, and the study reported extended lifespan.
- D-serine supplementation in drinking water improved cognition in mice but did not reproduce the broader physical aging benefits seen with Menin restoration, and the study stressed dietary L-serine from foods is not interchangeable with the experimental D-serine treatment.
- Subsequent research has complicated the picture: a 2024 cell study reinforced Menin's protective role with the compound itaconate, while April 2025 work in Alzheimer's-model mice found early D-serine rises accompanied brain signaling disruption, suggesting effects depend on the underlying disease.
- Human evidence remains thin: a 2016 randomized study of 50 healthy older adults given a single D-serine dose improved performance on one computerized maze task but showed no significant benefit on other cognitive or mood measures.
Why it matters: The Menin pathway positions the hypothalamus as a command center for whole-body aging, but the source explicitly flags that follow-up work shows D-serine is not a simple 'more is better' supplement and that human data so far is limited to a 50-person single-dose trial with marginal results. Any translation to clinical anti-aging therapy would require resolving which form of serine, which patient population, and which outcome actually responds — none of which the current evidence answers.
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