Fucosterol from an Edible Brown Alga Ecklonia stolonifera Prevents Soluble Amyloid Beta-Induced Cognitive Dysfunction in Aging Rats.

Abstract

Fucosterol from edible brown seaweeds has various biological activities, including anti-inflammatory, anti-adipogenic, antiphotoaging, anti-acetylcholinesterase, and anti-beta-secretase 1 activities. However, little is known about its effects on soluble amyloid beta peptide (sAβ)-induced endoplasmic reticulum (ER) stress and cognitive impairment. Fucosterol was isolated from the edible brown seaweed Ecklonia stolonifera, and its neuroprotective effects were analyzed in primary hippocampal neurons and in aging rats. Fucosterol attenuated sAβ1-42-induced decrease in the viability of hippocampal neurons and downregulated sAβ1-42-induced increase in glucose-regulated protein 78 (GRP78) expression in hippocampal neurons via activation of tyrosine receptor kinase B-mediated ERK1/2 signaling. Fucosterol co-infusion attenuated sAβ1-42-induced cognitive impairment in aging rats via downregulation of GRP78 expression and upregulation of mature brain-derived neurotrophic factor expression in the dentate gyrus. Fucosterol might be beneficial for the management of cognitive dysfunction via suppression of aging-induced ER stress.

• Authors: Jeong Hwan Oh, Jae Sue Choi, Taek-Jeong Nam
• Journal: Marine drugs (Mar Drugs) Vol. 16 Issue 10 (Oct 05 2018) ISSN: 1660-3397 [Electronic] Switzerland
• PMID: 30301140 (Publication Type: Journal Article)

Chemical References

• Amyloid beta-Peptides
• Brain-Derived Neurotrophic Factor
• Endoplasmic Reticulum Chaperone BiP
• Heat-Shock Proteins
• Neuroprotective Agents
• fucosterol
• Stigmasterol
• Protein-Tyrosine Kinases

Topics

• Aging (drug effects, metabolism)
• Amyloid beta-Peptides (metabolism)
• Animals
• Brain-Derived Neurotrophic Factor (metabolism)
• Cognitive Dysfunction (metabolism, prevention & control)
• Down-Regulation (drug effects)
• Endoplasmic Reticulum Chaperone BiP
• Endoplasmic Reticulum Stress (drug effects)
• Heat-Shock Proteins (metabolism)
• Hippocampus (drug effects, metabolism)
• MAP Kinase Signaling System (drug effects)
• Neurons (drug effects, metabolism)
• Neuroprotective Agents (pharmacology)
• Phaeophyta (metabolism)
• Protein-Tyrosine Kinases (metabolism)
• Rats
• Seaweed (metabolism)
• Signal Transduction (drug effects)
• Stigmasterol (analogs & derivatives, pharmacology)
• Up-Regulation (drug effects)