Effect of curcumin on amyloid-like aggregates generated from methionine-oxidized apolipoprotein A-I.

Abstract:

:Curcumin is a polyphenolic phytonutrient that has antineurodegenerative properties. In this study, we investigated the anti-amyloidogenic properties of curcumin. Following incubation with curcumin, intrinsic tryptophan fluorescence emission of apolipoprotein (apo) A-I was strongly quenched. At the same time, curcumin fluorescence emission was enhanced. The fluorescence emission spectra of curcumin in the presence of amyloid-like aggregates formed by methionine-oxidized (ox) apoA-I varied, depending on whether curcumin was added before, or after, aggregate formation. The impact of curcumin on the structure of the aggregating material was revealed by the lower amount of β-structure in ox-apoA-I amyloid-like aggregates formed in the presence of curcumin, compared to aggregates formed without curcumin. However, the kinetics of ox-apoA-I amyloid-like aggregate formation was not altered by the presence of curcumin. Moreover, electron microscopy analysis detected no discernable differences in amyloid morphology when ox-apoA-I amyloid-like aggregates were formed in the presence or absence of curcumin. In conclusion, curcumin interacts with apoA-I and alters the structure of ox-apoA-I amyloid-like aggregates yet does not diminish the propensity of ox-apoA-I to form aggregates.

journal_name

FEBS Open Bio

journal_title

FEBS open bio

authors

Krishnamoorthy A,Tavoosi N,Chan GKL,Liu J,Ren G,Cavigiolio G,Ryan RO

doi

10.1002/2211-5463.12372

subject

Has Abstract

pub_date

2018-01-10 00:00:00

pages

302-310

issue

2

issn

2211-5463

pii

FEB412372

journal_volume

8

pub_type

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