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Hyeon JW, Noh R, Choi J, Lee SM, Lee YS, An SSA, No KT, Lee J. BMD42-2910, a Novel Benzoxazole Derivative, Shows a Potent Anti-prion Activity and Prolongs the Mean Survival in an Animal Model of Prion Disease. Exp Neurobiol 2020; 29:93-105. [PMID: 32122111 PMCID: PMC7075655 DOI: 10.5607/en.2020.29.1.93] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 02/04/2020] [Accepted: 02/25/2020] [Indexed: 12/24/2022] Open
Abstract
Prion diseases are a group of neurodegenerative and fatal central nervous system disorders. The pathogenic mechanism involves the conversion of cellular prion protein (PrPC) to an altered scrapie isoform (PrPSc), which accumulates in amyloid deposits in the brain. However, no therapeutic drugs have demonstrated efficacy in clinical trials. We previously reported that BMD42-29, a synthetic compound discovered in silico, is a novel anti-prion compound that inhibits the conversion of PrPC to protease K (PK)-resistant PrPSc fragments (PrPres). In the present study, 14 derivatives of BMD42-29 were obtained from BMD42-29 by modifying in the side chain by in silico feedback, with the aim to determine whether they improve anti-prion activity. These derivatives were assessed in a PrPSc-infected cell model and some derivatives were further tested using real time-quaking induced conversion (RT-QuIC). Among them, BMD42-2910 showed high anti-prion activity at low concentrations in vitro and also no toxic effects in a mouse model. Interestingly, abundant PrPres was reduced in brains of mice infected with prion strain when treated with BMD42-2910, and the mice survived longer than control mice and even that treated with BMD42-29. Finally, high binding affinity was predicted in the virtual binding sites (Asn159, Gln 160, Lys194, and Glu196) when PrPC was combined with BMD-42-2910. Our findings showed that BMD42-2910 sufficiently reduces PrPres generation in vitro and in vivo and may be a promising novel anti-prion compound.
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Affiliation(s)
- Jae Wook Hyeon
- Division of Bacterial Disease Research, Center for Infectious Disease Research, Korea National Institute of Health, Centers for Disease Control and Prevention, Cheongju 28160, Korea
| | - Ran Noh
- Division of Bacterial Disease Research, Center for Infectious Disease Research, Korea National Institute of Health, Centers for Disease Control and Prevention, Cheongju 28160, Korea
| | - Jiwon Choi
- Bioinformatics and Molecular Design Research Center, Yonsei University, Seoul 03722, Korea
| | - Sol Moe Lee
- Division of Bacterial Disease Research, Center for Infectious Disease Research, Korea National Institute of Health, Centers for Disease Control and Prevention, Cheongju 28160, Korea
| | - Yeong Seon Lee
- Division of Bacterial Disease Research, Center for Infectious Disease Research, Korea National Institute of Health, Centers for Disease Control and Prevention, Cheongju 28160, Korea
| | - Seong Soo A An
- Gachon Bio Nano Research Institute, Gachon University, Seongnam 13120, Korea
| | - Kyoung Tai No
- Bioinformatics and Molecular Design Research Center, Yonsei University, Seoul 03722, Korea.,Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea
| | - Jeongmin Lee
- Division of Research Planning, Korea National Institute of Health, Centers for Disease Control and Prevention, Cheongju 28160, Korea
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Choi J, Kim HJ, Jin X, Lim H, Kim S, Roh IS, Kang HE, No KT, Sohn HJ. Application of the fragment molecular orbital method to discover novel natural products for prion disease. Sci Rep 2018; 8:13063. [PMID: 30166585 PMCID: PMC6117342 DOI: 10.1038/s41598-018-31080-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 08/07/2018] [Indexed: 01/16/2023] Open
Abstract
Conformational conversion of the normal cellular isoform of the prion protein PrPC into an infectious isoform PrPSc causes pathogenesis in prion diseases. To date, numerous antiprion compounds have been developed to block this conversion and to detect the molecular mechanisms of prion inhibition using several computational studies. Thus far, no suitable drug has been identified for clinical use. For these reasons, more accurate and predictive approaches to identify novel compounds with antiprion effects are required. Here, we have applied an in silico approach that integrates our previously described pharmacophore model and fragment molecular orbital (FMO) calculations, enabling the ab initio calculation of protein-ligand complexes. The FMO-based virtual screening suggested that two natural products with antiprion activity exhibited good binding interactions, with hotspot residues within the PrPC binding site, and effectively reduced PrPSc levels in a standard scrapie cell assay. Overall, the outcome of this study will be used as a promising strategy to discover antiprion compounds. Furthermore, the SAR-by-FMO approach can provide extremely powerful tools in quickly establishing virtual SAR to prioritise compounds for synthesis in further studies.
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Affiliation(s)
- Jiwon Choi
- Bioinformatics and Molecular Design Research Center (BMDRC), Yonsei University, Seoul, 03722, Korea
| | - Hyo-Jin Kim
- OIE Reference Laboratory for CWD, Foreign Animal Disease Research Division, Animal and Plant Quarantine Agency, Gimcheon, Gyeongsangbukdo, 39660, Korea
| | - Xuemei Jin
- Department of Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - Hocheol Lim
- Department of Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - Songmi Kim
- Bioinformatics and Molecular Design Research Center (BMDRC), Yonsei University, Seoul, 03722, Korea
| | - In-Soon Roh
- OIE Reference Laboratory for CWD, Foreign Animal Disease Research Division, Animal and Plant Quarantine Agency, Gimcheon, Gyeongsangbukdo, 39660, Korea
| | - Hae-Eun Kang
- OIE Reference Laboratory for CWD, Foreign Animal Disease Research Division, Animal and Plant Quarantine Agency, Gimcheon, Gyeongsangbukdo, 39660, Korea
| | - Kyoung Tai No
- Bioinformatics and Molecular Design Research Center (BMDRC), Yonsei University, Seoul, 03722, Korea.
- Department of Biotechnology, Yonsei University, Seoul, 03722, Korea.
| | - Hyun-Joo Sohn
- OIE Reference Laboratory for CWD, Foreign Animal Disease Research Division, Animal and Plant Quarantine Agency, Gimcheon, Gyeongsangbukdo, 39660, Korea.
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