Novel noscapine derivatives stabilize the native state of insulin against fibrillation.

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ID: 79262
2020
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Ranked #117 of 200 articles by views in International journal of biological macromolecules

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Abstract
Protein aggregation to form amyloid is associated with many human diseases, increasing the need to develop inhibitors of this process. Here we evaluate the ability of derivatives of the small organic compound noscapine, derived from the opium poppy, to inhibit fibrillation of the model protein insulin. We combined biophysical methods to assess insulin stability and aggregation with computational docking and cell viability studies to identify the most potent derivatives. The best aggregation inhibitor (a phenyl derivative of N-nornoscapine) also demonstrated the highest ability to stabilize native insulin against thermal denaturation. This compound maintained insulin largely in the monomeric and natively folded state under fibrillation conditions and also decreased insulin aggregate toxicity against human neuroblastoma SH-SY5Y cells. The inhibitory effects were specific for insulin fibrillation, as the noscapine compounds did not inhibit fibrillation of other proteins such as α-synuclein, Aβ, and FapC. Our data demonstrate that compounds which stabilize the folded native state of a protein can not only inhibit fibrillation but also decrease the toxicity of the mature fibrillar aggregates of insulin protein.
Reference Key
alijanvand2020novelinternational Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Alijanvand, Saeid Hadi;Christensen, Mikkel Hovden;Christiansen, Gunna;Harikandei, Kosar Babanezhad;Salehi, Peyman;Schiøtt, Birgit;Moosavi-Movahedi, Ali Akbar;Otzen, Daniel E;
Journal International journal of biological macromolecules
Year 2020
DOI
S0141-8130(19)38071-7
URL
Keywords
insulin cell viability noscapine protein fibrillation inhibitors protein ligands

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