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10.1128/AAC.01441-17 http://scihub22266oqcxt.onion/10.1128/AAC.01441-17 C5786768!5786768 !29133563     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=29133563 &cmd=llinks): Failed to open stream: HTTP request failed! 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A Promising Antiprion Trimethoxychalcone Binds to the Globular Domain of the Cellular Prion Protein and Changes Its Cellular Location |pdf=|usr=}}{{29133563 }} gab.com Text A Promising Antiprion Trimethoxychalcone Binds to the Globular Domain of the Cellular Prion Protein and Changes Its Cellular Location JO: Antimicrob Agents Chemother http://www.kidney.de/pget.php?&tw=1&pmid=29133563 #FOAvip The search for antiprion compounds has been encouraged by the fact that transmissible spongiform encephalopathies (TSEs) share molecular mechanisms with more prevalent neurodegenerative pathologies, such as Parkinson's and Alzheimer's diseases. Cellular prion protein (PrP(C)) conversion into protease-resistant forms (protease-resistant PrP [PrP(Res)] or the scrapie form of PrP [PrP(Sc)]) is a critical step in the development of TSEs and is thus one of the main targets in the screening for antiprion compounds. In this work, three trimethoxychalcones (compounds J1, J8, and J20) and one oxadiazole (compound Y17), previously identified in vitro to be potential antiprion compounds, were evaluated through different approaches in order to gain inferences about their mechanisms of action. None of them changed PrP(C) mRNA levels in N2a cells, as shown by reverse transcription-quantitative real-time PCR. Among them, J8 and Y17 were effective in real-time quaking-induced conversion reactions using rodent recombinant PrP (rPrP) from residues 23 to 231 (rPrP(23-231)) as the substrate and PrP(Sc) seeds from hamster and human brain. However, when rPrP from residues 90 to 231 (rPrP(90-231)), which lacks the N-terminal domain, was used as the substrate, only J8 remained effective, indicating that this region is important for Y17 activity, while J8 seems to interact with the PrP(C) globular domain. J8 also reduced the fibrillation of mouse rPrP(23-231) seeded with in vitro-produced fibrils. Furthermore, most of the compounds decreased the amount of PrP(C) on the N2a cell surface by trapping this protein in the endoplasmic reticulum. On the basis of these results, we hypothesize that J8, a nontoxic compound previously shown to be a promising antiprion agent, may act by different mechanisms, since its efficacy is attributable not only to PrP conversion inhibition but also to a reduction of the PrP(C) content on the cell surface. Twit Text FOAVip A Promising Antiprion Trimethoxychalcone Binds to the Globular Domain of the Cellular Prion Protein and Changes Its Cellular Location ????Antimicrob Agents Chemother http://www.kidney.de/pget.php?&tw=1&pmid=29133563 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=29133563 #FOAvip English Wikipedia <ref>{{Cite pmid|29133563 }}</ref> A Promising Antiprion Trimethoxychalcone Binds to the Globular Domain of the Cellular Prion Protein and Changes Its Cellular Location #MMPMID29133563 Ferreira NC ; Ascari LM ; Hughson AG ; Cavalheiro GR ; Góes CF ; Fernandes PN ; Hollister JR ; da Conceição RA ; Silva DS ; Souza AMT ; Barbosa MLC ; Lara FA ; Martins RAP ; Caughey B ; Cordeiro Y Antimicrob Agents Chemother 2018[Feb]; 62 (2 ): ä PMID29133563 show ga The search for antiprion compounds has been encouraged by the fact that transmissible spongiform encephalopathies (TSEs) share molecular mechanisms with more prevalent neurodegenerative pathologies, such as Parkinson's and Alzheimer's diseases. Cellular prion protein (PrP(C)) conversion into protease-resistant forms (protease-resistant PrP [PrP(Res)] or the scrapie form of PrP [PrP(Sc)]) is a critical step in the development of TSEs and is thus one of the main targets in the screening for antiprion compounds. In this work, three trimethoxychalcones (compounds J1, J8, and J20) and one oxadiazole (compound Y17), previously identified in vitro to be potential antiprion compounds, were evaluated through different approaches in order to gain inferences about their mechanisms of action. None of them changed PrP(C) mRNA levels in N2a cells, as shown by reverse transcription-quantitative real-time PCR. Among them, J8 and Y17 were effective in real-time quaking-induced conversion reactions using rodent recombinant PrP (rPrP) from residues 23 to 231 (rPrP(23-231)) as the substrate and PrP(Sc) seeds from hamster and human brain. However, when rPrP from residues 90 to 231 (rPrP(90-231)), which lacks the N-terminal domain, was used as the substrate, only J8 remained effective, indicating that this region is important for Y17 activity, while J8 seems to interact with the PrP(C) globular domain. J8 also reduced the fibrillation of mouse rPrP(23-231) seeded with in vitro-produced fibrils. Furthermore, most of the compounds decreased the amount of PrP(C) on the N2a cell surface by trapping this protein in the endoplasmic reticulum. On the basis of these results, we hypothesize that J8, a nontoxic compound previously shown to be a promising antiprion agent, may act by different mechanisms, since its efficacy is attributable not only to PrP conversion inhibition but also to a reduction of the PrP(C) content on the cell surface. |Animals [MESH] |Binding Sites [MESH] |Cell Line, Tumor [MESH] |Chalcones/chemical synthesis/*pharmacology [MESH] |Cloning, Molecular [MESH] |Drugs, Investigational/chemical synthesis/*pharmacology [MESH] |Endoplasmic Reticulum/drug effects/metabolism/ultrastructure [MESH] |Escherichia coli/genetics/metabolism [MESH] |Gene Expression [MESH] |Genetic Vectors/chemistry/metabolism [MESH] |Kinetics [MESH] |Mice [MESH] |Molecular Docking Simulation [MESH] |Neurons/*drug effects/metabolism/pathology [MESH] |Oxadiazoles/chemical synthesis/*pharmacology [MESH] |Prion Proteins/*antagonists & inhibitors/chemistry/genetics/metabolism [MESH] |Protein Binding [MESH] |Protein Conformation, alpha-Helical [MESH] |Protein Interaction Domains and Motifs [MESH] |Recombinant Proteins/chemistry/genetics/metabolism [MESH] |Structure-Activity Relationship [MESH]A Promising Antiprion Trimethoxychalcone Binds to the Globular Domain (epmc).pdf DeepDyve Pubget Overpricing