Crocetin inhibits beta-amyloid fibrillization and stabilizes beta-amyloid oligomers

Joon Ho Ahn, Yang Hu, Michael Hernandez, Jin Ryoun Kim

Research output: Contribution to journalArticle

Abstract

Aggregation of a peptide, beta-amyloid (Aβ), is a hallmark molecular process found in Alzheimer's disease (AD). During Aβ aggregation, oligomeric and fibrillar Aβ are formed, and these molecular self-assembly steps are implicated in generation of toxic effects in AD. Crocetin is a natural carotenoid dicarboxyl acid displaying various pharmaceutical effects and may be co-localized with Aβ mediated by human serum albumin. In the study presented here, we examined the effects of crocetin on Aβ aggregation in three different molecular pathways. Our results demonstrate that crocetin inhibited Aβ fibril formation and destabilized pre-formed Aβ fibrils. Moreover, crocetin caused stabilization of Aβ oligomers and prevented their conversion into Aβ fibrils. Our study reveals potential pathological and pharmaceutical implication of crocetin in AD and suggests possible application of crocetin for currently limited structural studies on unstable Aβ oligomers.

Original languageEnglish (US)
Pages (from-to)79-83
Number of pages5
JournalBiochemical and Biophysical Research Communications
Volume414
Issue number1
DOIs
StatePublished - Oct 14 2011

Keywords

  • Beta-amyloid
  • Crocetin
  • Fibril
  • Oligomer
  • Protein aggregation

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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