Issue 19, 2016

Roles of DMSO-type ruthenium complexes in disaggregation of prion neuropeptide PrP106–126

Abstract

Ruthenium complexes are potential anticancer metallodrugs and inhibitors of various proteins, such as enzymes and even amyloid peptides. Studies on Aβ protein, human islet amyloid polypeptide, and prion neuropeptide have indicated that Ru complexes can inhibit amyloidosis. However, the interaction mechanism of peptides with Ru complexes remains unclear. In this study, we selected four dimethyl sulfoxide (DMSO)-type Ru complexes containing large aromatic ligands to explore and compare the interactions of Ru complexes with the prion neuropeptide PrP106–126. Results showed that, unlike new anti-tumor metastasis inhibitor-A-like compounds, these complexes can bind to PrP106–126 mainly through metal coordination and hydrophobic interaction. The Ru complexes disaggregated the PrP106–126 fibrils into scattered fragments or amorphous forms, thereby reducing the toxicity of PrP106–126. Among the four Ru complexes, complex 1, which consists of bipyridyl and DMSO ligands, exhibited the highest disaggregation ability and relatively high cell viability, which may be attributed to its molecular configuration and low cytotoxicity. These results suggested that Ru complexes are promising metallodrugs against amyloidosis-related diseases.

Graphical abstract: Roles of DMSO-type ruthenium complexes in disaggregation of prion neuropeptide PrP106–126

Supplementary files

Article information

Article type
Paper
Submitted
15 Oct 2015
Accepted
27 Jan 2016
First published
29 Jan 2016

RSC Adv., 2016,6, 16055-16065

Roles of DMSO-type ruthenium complexes in disaggregation of prion neuropeptide PrP106–126

D. Zhu, C. Zhao, X. Wang, W. Wang, B. Wang and W. Du, RSC Adv., 2016, 6, 16055 DOI: 10.1039/C5RA21523D

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