Exploring the effects of methylene blue on amyloid fibrillogenesis of lysozyme

Su Chun How, Yu Hong Cheng, Chun Hsien Lo, Jinn Tsyy Lai, Ta Hsien Lin, Zuzana Bednarikova, Andrea Antosova, Zuzana Gazova*, Josephine W. Wu, Steven S.S. Wang


研究成果: Article同行評審

21 引文 斯高帕斯(Scopus)


The 129-residue lysozyme has been shown to form amyloid fibrils in vitro. While methylene blue (MB), a compound in the phenothiazinium family, has been shown to dissemble tau fibril formation, its anti-fibrillogenic effect has not been thoroughly characterized in other proteins/peptides. This study examines the effects of MB on the in vitro fibrillogenesis of lysozyme at pH 2.0 and 55 °C. Our results demonstrated that, upon 7-day incubation, the plateau ThT fluorescence of the sample was found to be ~8.69% or ~2.98% of the control when the molar ratio of lysozyme to MB was at 1:1.11 or 1:3.33, respectively, indicating that the inhibitory potency of MB against lysozyme fibrillogenesis is positively correlated with its concentration. We also found that MB is able to destabilize the preformed lysozyme fibrils. Moreover, molecular docking and molecular dynamics simulations results revealed that MB's mechanism of fibril formation inhibition may be triggered by binding with lysozyme's aggregation-prone region. Results reported here provide solid support for MB's effect on amyloid fibrillogenesis. We believe the additional insights gained herein may pave way to the discovery of other small molecules that may have similar action toward amyloid fibril formation and its associated diseases.

頁(從 - 到)1059-1067
期刊International Journal of Biological Macromolecules
出版狀態Published - 11月 2018


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