Eicosapentaenoic acid-enriched phospholipids improve Aβ1–40-induced cognitive deficiency in a rat model of Alzheimer's disease

• Published in: Journal of Functional Foods
• Main Authors: Min Wen, Jie Xu, Lin Ding, Lingyu Zhang, Lei Du, Jingfeng Wang, Yuming Wang, Changhu Xue
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier 2016
• Subjects: Alzheimer's disease; Aβ1–40; EPA-PLs; Inflammation; Hyperphosphorylated tau; Apoptosis; Nutrition. Foods and food supply; TX341-641; Antarctic; Antarc*; Antarctic Krill; Cucumaria frondosa
• Online Access: https://doi.org/10.1016/j.jff.2016.04.034; https://doaj.org/article/478bd4b90e6e4a7897e29e3ad29b449c

Abundant studies have proven that the protective effects of omega-3 polyunsaturated fatty acids enriched phospholipids (n-3 PUFA-PLs) mainly derived from fish roe and Antarctic krill have beneficial effects on cognition. However, the n-3 PUFA-PLs are usually a mixture of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) enriched phospholipids. Hence, the effects of EPA-PLs alone on cognitive deficiency are still unclear. In the present study, we obtained almost pure EPA-PLs (EPA:DHA = 47.9:2.08) from the sea cucumber, Cucumaria frondosa, and investigated its effects on Aβ-induced cognitive impairment in rats. Administration of EPA-PLs (150 and 300 mg/kg⋅day, i.g., 27 days) did not increase brain DHA but significantly improved Aβ-induced cognitive deficiency. Further mechanism research indicated that EPA-PLs alleviated Aβ-induced neurotoxicity including oxidative stress, apoptosis, neuro-inflammation cascade, and hyper-phosphorylated tau in a dose-dependent pattern. These findings first suggest that EPA-PLs could also improve Aβ induced cognitive deficiency in a similar mechanism with DHA-PLs.