Study summary · research use only
Intranasal GHK peptide enhances resilience to cognitive decline in aging mice
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
This mouse study (C57BL/6, 20 months old, male and female) tested whether intranasal GHK-Cu, a copper-bound form of the naturally occurring peptide GHK (glycyl-L-histidyl-L-lysine), affects cognitive decline associated with aging. Mice received intranasal GHK-Cu at 15 mg/kg daily for two months, compared with mice given intranasal saline. The abstract reports that GHK-Cu-treated mice showed enhanced performance on spatial memory and learning navigation tasks, along with decreased markers of neuroinflammation and axonal damage compared to saline-treated mice. The authors describe these findings as suggesting that GHK-Cu can enhance resilience to brain aging, with implications for further testing in preclinical and clinical studies using an atomizer device for intranasal delivery.
Abstract
Brain aging and cognitive decline are aspects of growing old. Age-related cognitive impairment entails the early stages of cognitive decline, and is extremely common, affecting millions of older people. Investigation into early cognitive decline as a treatable condition is relevant to a wide range of cognitive impairment conditions, since mild age-related neuropathology increases risk for more severe neuropathology and dementia associated with Alzheimer's Disease. Recent studies suggest that the naturally occurring peptide GHK (glycyl-L-histidyl-L-lysine) in its Cu-bound form, has the potential to treat cognitive decline associated with aging. In order to test this concept, male and female C57BL/6 mice, 20 months of age, were given intranasal GHK-Cu, 15 mg/kg daily, for two months. Results showed that mice treated with intranasal GHK-Cu had an enhanced level of cognitive performance in spatial memory and learning navigation tasks, and expressed decreased neuroinflammatory and axonal damage markers compared to mice treated with intranasal saline. These observations suggest that GHK-Cu can enhance resilience to brain aging, and has translational implications for further testing in both preclinical and clinical studies using an atomizer device for intranasal delivery.
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