Fucoxanthin Inhibits β-Amyloid Assembly and Attenuates β-Amyloid Oligomer-Induced Cognitive Impairments.
Siying XiangFufeng LiuJiajia LinHuixin ChenChunhui HuangLiping ChenYiying ZhouLuying YeKe ZhangJiukai JinJiacheng ZhenChuang WangShan HeQinwen WangWei CuiJinrong ZhangPublished in: Journal of agricultural and food chemistry (2017)
β-Amyloid (Aβ) can form aggregates through self-assembly and produce neurotoxicity in the early stage of Alzheimer's disease (AD). Therefore, the inhibition of Aβ assembly is considered as the primary target for AD therapy. In this study, we reported that fucoxanthin, a marine carotenoid, potently reduced the formation of Aβ fibrils and oligomers. Moreover, the fucoxanthin-triggered modification significantly reduced the neurotoxicity of Aβ oligomers in vitro. Molecular dynamics simulation analysis further revealed a hydrophobic interaction between fucoxanthin and Aβ peptide, which might prevent the conformational transition and self-assembly of Aβ. Most importantly, fucoxanthin could attenuate cognitive impairments in Aβ oligomer-injected mice. In addition, fucoxanthin significantly inhibited oxidative stress, enhanced the expression of brain-derived neurotrophic factor, and increased ChAT-positive regions in the hippocampus of mice. On the basis of these novel findings, we anticipated that fucoxanthin might ameliorate AD via inhibiting Aβ assembly and attenuating Aβ neurotoxicity.
Keyphrases
- molecular dynamics simulations
- early stage
- oxidative stress
- poor prognosis
- diabetic rats
- molecular docking
- high glucose
- type diabetes
- squamous cell carcinoma
- metabolic syndrome
- ionic liquid
- adipose tissue
- cognitive decline
- binding protein
- skeletal muscle
- wild type
- cerebral ischemia
- mild cognitive impairment
- drug induced
- rectal cancer
- induced apoptosis
- subarachnoid hemorrhage
- sentinel lymph node
- heat shock protein
- smoking cessation