Study wrapper · #292
Intranasal GHK peptide enhances resilience to cognitive decline in aging mice.
Editor's note
A bioRxiv preprint — not yet peer-reviewed — reporting a preclinical study of intranasal GHK-Cu in normally aging mice, distinct from the amyloid-model work elsewhere in this collection. Researchers gave 20-month-old male and female C57BL/6 mice daily intranasal GHK-Cu (15 mg/kg) for two months and reported better spatial memory and navigation performance alongside reduced neuroinflammatory and axonal-damage markers versus saline controls. Using aged wild-type animals rather than a transgenic disease model is a reasonable way to probe brain-aging resilience, and both sexes were included. Caveats: small-model behavioural endpoints, a single species and dose, no peer review yet, and no human data on GHK-Cu for cognition. The abstract's framing of GHK-Cu as a potential intervention for cognitive decline reflects the authors' aim, not a demonstrated outcome. These are preclinical findings; human studies are needed before any clinical conclusions can be drawn.
Plain-language abstract
As people and animals age, memory and thinking can gradually decline. GHK-Cu is a naturally occurring copper-bound peptide that earlier research suggested might support brain function. In this preprint (a study shared before peer review), researchers tested it in old mice. Male and female mice aged 20 months received GHK-Cu sprayed into the nose (15 mg per kg of body weight) every day for two months, while comparison mice received plain salt water. The GHK-Cu group performed better on spatial memory and maze-navigation tasks and showed lower levels of markers linked to brain inflammation and nerve-fiber damage. The authors suggest the peptide may help the aging brain stay resilient and could be worth testing further, including in people, using a nasal-spray device. Because this was done only in mice and has not yet been peer-reviewed, it cannot show whether GHK-Cu would help human memory. The abstract did not report side effects.