Sea Cucumber-Derived Peptide Attenuates Scopolamine-Induced Cognitive Impairment by Preventing Hippocampal Cholinergic Dysfunction and Neuronal Cell Death.
Yue ZhaoZhiqiang LuXiaomeng XuNa SunSongyi LinPublished in: Journal of agricultural and food chemistry (2022)
The incidence of neurodegenerative diseases related to cognitive decline and memory loss is on the rise as the global elderly population increases. In this study, we evaluated the effect of the sea cucumber-derived peptide Phe-Tyr-Asp-Trp-Pro-Lys (FYDWPK) on scopolamine-induced neurotoxicity in an animal model. The Morris water maze, passive avoidance apparatus, and shuttle box test were used to assess learning and memory abilities. In behavioral tests, FYDWPK effectively alleviated learning and memory impairment. FYDWPK also alleviated cholinergic dysfunction in mice with dementia. Furthermore, FYDWPK significantly improved oxidative imbalance by increasing superoxide dismutase activity and decreasing malondialdehyde levels ( P < 0.05). The pathological results showed that FYDWPK alleviated neuronal loss, blurred caryotheca, and pyknotic nuclei in the hippocampus, and a high dose of FYDWPK had the best effect. In conclusion, FYDWPK alleviated cognitive and memory impairments by regulating oxidative imbalance, reducing cholinergic dysfunction, and relieving pathological alterations.
Keyphrases
- cognitive decline
- cognitive impairment
- mild cognitive impairment
- cell death
- high dose
- oxidative stress
- cerebral ischemia
- diabetic rats
- high glucose
- drug induced
- working memory
- transcription factor
- type diabetes
- hydrogen peroxide
- metabolic syndrome
- nitric oxide
- brain injury
- subarachnoid hemorrhage
- anti inflammatory
- cell cycle arrest
- pi k akt