Abstract
Sleep deprivation is known to cause memory impairment and is associated with inflammation and cell damage linked to neurodegenerative diseases. GHK (glycyl-L-histidyl-L-lysine) is a naturally occurring tripeptide found in mammalian plasma. GHK has anti-inflammatory activity and can pass through the blood-brain barrier suggesting the potential to prevent neuroinflammation associated with sleep deprivation. In this study, mice were injected with 15 mg/kg GHK per day for five days and sleep deprived on the last two days of treatment. Sleep-deprived mice treated with GHK did not show the acute learning impairment seen in sleep-deprived mice treated with saline. GHK prevented an increase in MCP-1 and nitrotyrosine levels in the hippocampus of sleep-deprived mice suggesting that inflammatory and reactive nitrogen/oxygen species activity could be therapeutic targets for learning impairment associated with short-term sleep deprivation.
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