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Title: Styryl-based and tricyclic compounds as potential anti-prion agents
Authors: Chung, E.
Prelli, F.
Dealler, S.
Lee, W.S.
Chang, Y.-T. 
Wisniewski, T.
Issue Date: 13-Sep-2011
Citation: Chung, E., Prelli, F., Dealler, S., Lee, W.S., Chang, Y.-T., Wisniewski, T. (2011-09-13). Styryl-based and tricyclic compounds as potential anti-prion agents. PLoS ONE 6 (9) : -. ScholarBank@NUS Repository.
Abstract: Prion diseases currently have no effective therapy. These illnesses affect both animal and human populations, and are characterized by the conformational change of a normal self protein PrP C (C for cellular) to a pathological and infectious conformer, PrP Sc (Sc for scrapie). We used a well characterized tissue culture model of prion infection, where mouse neuroblastoma cells (N2a) were infected with 22L PrP Sc, to screen compounds for anti-prion activity. In a prior study we designed a library of styryl based, potential imaging compounds which were selected for high affinity binding to Alzheimer's disease β-amyloid plaques and good blood-brain barrier permeability. In the current study we screened this library for activity in the N2a/22L tissue culture system. We also tested the anti-prion activity of two clinically used drugs, trimipramine and fluphenazine, in the N2a/22L system. These were selected based on their structural similarity to quinacrine, which was previously reported to have anti-prion activity. All the compounds were also screened for toxicity in tissue culture and their ability to disaggregate amyloid fibrils composed of PrP and β-amyloid synthetic peptides in vitro. Two of the imaging agents, 23I and 59, were found to be both effective at inhibiting prion infection in N2a/22L tissue culture and to be non-toxic. These two compounds, as well as trimipramine and fluphenazine were evaluated in vivo using wild-type CD-1 mice infected peripherally with 139A PrP Sc. All four agents significantly prolonged the asymptomatic incubation period of prion infection (p
Source Title: PLoS ONE
ISSN: 19326203
DOI: 10.1371/journal.pone.0024844
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