Procyanidine resists the fibril formation of human islet amyloid polypeptide.

Abstract

Human islet amyloid polypeptide (hIAPP) is widely studied due to its close correlation with the pathogenic mechanism of type II diabetes mellitus (T2DM). Bioflavonoids have been used in the neurodegeneration and diabetes studies. However, the structure-activity relationship remains unclear in many of these compounds. In this work, we performed diverse biophysical and biochemical methods to explore the inhibition of procyanidine on hIAPP and compared with that on amyloid-β (Aβ) protein which is linked to Alzheimer's disease (AD). The procyanidine effectively inhibited the aggregation of hIAPP and Aβ through hydrophobic and hydrogen bonding interactions, it dissolved the aged fibrils into nanoscale particles. The compound also ameliorated the cytotoxicity and the membrane leakage by reducing the peptide oligomerization. The procyanidine showed better binding affinity and inhibitory effects on peptide aggregation and upregulated the cell viability to hIAPP than to Aβ, which could be a prospective inhibitor against hIAPP. This work also offered a possible strategy for T2DM and AD treatments.

• Authors: Jufei Xu, Ting Zheng, Xiangyi Huang, Yanan Wang, Guowei Yin, Weihong Du
• Journal: International journal of biological macromolecules (Int J Biol Macromol) Vol. 183 Pg. 1067-1078 (Jul 31 2021) ISSN: 1879-0003 [Electronic] Netherlands
• PMID: 33965498 (Publication Type: Journal Article)
• Copyright: Copyright © 2021. Published by Elsevier B.V.

Chemical References

• Amyloid
• Biflavonoids
• Islet Amyloid Polypeptide
• Proanthocyanidins
• procyanidin
• Catechin

Topics

• Alzheimer Disease (metabolism)
• Amyloid (drug effects, metabolism)
• Biflavonoids (pharmacology)
• Catechin (pharmacology)
• Diabetes Mellitus, Type 2 (metabolism)
• Humans
• Islet Amyloid Polypeptide (metabolism)
• Proanthocyanidins (pharmacology)