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Tahir ul Qamar M, Bari A, Adeel MM, Maryam A, Ashfaq UA, Du X, Muneer I, Ahmad HI, Wang J. Peptide vaccine against chikungunya virus: immuno-informatics combined with molecular docking approach. J Transl Med 2018; 16:298. [PMID: 30368237 PMCID: PMC6204282 DOI: 10.1186/s12967-018-1672-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Accepted: 10/19/2018] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Chikungunya virus (CHIKV), causes massive outbreaks of chikungunya infection in several regions of Asia, Africa and Central/South America. Being positive sense RNA virus, CHIKV replication within the host resulting in its genome mutation and led to difficulties in creation of vaccine, drugs and treatment strategies. Vector control strategy has been a gold standard to combat spreading of CHIKV infection, but to eradicate a species from the face of earth is not an easy task. Therefore, alongside vector control, there is a dire need to prevent the infection through vaccine as well as through antiviral strategies. METHODS This study was designed to find out conserved B cell and T cell epitopes of CHIKV structural proteins through immuno-informatics and computational approaches, which may play an important role in evoking the immune responses against CHIKV. RESULTS Several conserved cytotoxic T-lymphocyte epitopes, linear and conformational B cell epitopes were predicted for CHIKV structural polyprotein and their antigenicity was calculated. Among B-cell epitopes "PPFGAGRPGQFGDI" showed a high antigenicity score and it may be highly immunogenic. In case of T cell epitopes, MHC class I peptides 'TAECKDKNL' and MHC class II peptides 'VRYKCNCGG' were found extremely antigenic. CONCLUSION The study led to the discovery of various epitopes, conserved among various strains belonging to different countries. The potential antigenic epitopes can be successfully utilized in designing novel vaccines for combating and eradication of CHIKV disease.
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Affiliation(s)
- Muhammad Tahir ul Qamar
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University (HZAU), Wuhan, People’s Republic of China
| | - Amna Bari
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad (GCUF), Faisalabad, Pakistan
| | - Muhammad Muzammal Adeel
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University (HZAU), Wuhan, People’s Republic of China
| | - Arooma Maryam
- Department of Biosciences, COMSATS Institute of Information Technology (CIIT), Islamabad, Pakistan
| | - Usman Ali Ashfaq
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad (GCUF), Faisalabad, Pakistan
| | - Xiaoyong Du
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University (HZAU), Wuhan, People’s Republic of China
- Key Lab of Animal Genetics, Breeding and Reproduction of Ministry Education, College of Animal Sciences & Technology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Iqra Muneer
- School of Life Sciences, University of Science and Technology of China, Hefei, People’s Republic of China
| | - Hafiz Ishfaq Ahmad
- Key Lab of Animal Genetics, Breeding and Reproduction of Ministry Education, College of Animal Sciences & Technology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Jia Wang
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University (HZAU), Wuhan, People’s Republic of China
- Key Lab of Animal Genetics, Breeding and Reproduction of Ministry Education, College of Animal Sciences & Technology, Huazhong Agricultural University, Wuhan, People’s Republic of China
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Schiela B, Bernklau S, Malekshahi Z, Deutschmann D, Koske I, Banki Z, Thielens NM, Würzner R, Speth C, Weiss G, Stiasny K, Steinmann E, Stoiber H. Active Human Complement Reduces the Zika Virus Load via Formation of the Membrane-Attack Complex. Front Immunol 2018; 9:2177. [PMID: 30386325 PMCID: PMC6199351 DOI: 10.3389/fimmu.2018.02177] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 09/03/2018] [Indexed: 01/07/2023] Open
Abstract
Although neglected in the past, the interest on Zika virus (ZIKV) raised dramatically in the last several years. The rapid spread of the virus in Latin America and the association of the infection with microcephaly in newborns or Guillain-Barré Syndrome in adults prompted the WHO to declare the ZIKV epidemic to be an international public health emergency in 2016. As the virus gained only limited attention in the past, investigations on interactions of ZIKV with human complement are limited. This prompted us to investigate the stability of the virus to human complement. At low serum concentrations (10%) which refers to complement concentrations found on mucosal surfaces, the virus was relatively stable at 37°C, while at high complement levels (50% serum concentration) ZIKV titers were dramatically reduced, although the virus remained infectious for about 4–5 min under these conditions. The classical pathway was identified as the main actor of complement activation driven by IgM antibodies. In addition, direct binding of C1q to both envelope and NS1 proteins was observed. Formation of the MAC on the viral surface and thus complement-mediated lysis and not opsonization seems to be essential for the reduction of viral titers.
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Affiliation(s)
- Britta Schiela
- Division of Virology, Medical University of Innsbruck, Innsbruck, Austria
| | - Sarah Bernklau
- Division of Virology, Medical University of Innsbruck, Innsbruck, Austria
| | - Zahra Malekshahi
- Division of Virology, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Iris Koske
- Division of Virology, Medical University of Innsbruck, Innsbruck, Austria
| | - Zoltan Banki
- Division of Virology, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Reinhard Würzner
- Division of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Cornelia Speth
- Division of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Guenter Weiss
- Department of Internal Medicine II, Medical University of Innsbruck, Innsbruck, Austria
| | - Karin Stiasny
- Center for Virology, Medical University of Vienna, Vienna, Austria
| | - Eike Steinmann
- Department of Molecular and Medical Virology, Ruhr University Bochum, Bochum, Germany
| | - Heribert Stoiber
- Division of Virology, Medical University of Innsbruck, Innsbruck, Austria
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153
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Almansour I, Alfares R, Aljofi H. Large-scale analysis of B-cell epitopes of envelope: Implications for Zika vaccine and immunotherapeutic development. F1000Res 2018; 7:1624. [PMID: 31316749 PMCID: PMC6611143 DOI: 10.12688/f1000research.16454.2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/21/2019] [Indexed: 12/21/2022] Open
Abstract
Background: Cases of the re-emergence of Zika virus in 2015 were associated with severe neurologic complications, including Gillien-Barre syndrome in adults and congenital Zika syndrome in newborns. The major structural determinant of immunity to the Zika virus is the E protein. Although B-cell epitopes of Zika E protein were recently identified, data regarding epitope variations among Zika strains in pre-epidemic and epidemic periods are lacking. Methods: Here, we conducted systematic bioinformatics analyses of Zika strains isolated between 1968 and 2017. Multiple sequence alignment of E protein as well as B-cell epitopes annotations were performed. In addition, homology-based approach was utilized to construct three-dimensional structures of monomeric E glycoproteins to annotate epitope variations. Lastly, prediction of of
N-glycosylation patterns and prediction of protein stability upon mutations were also investigated. Results: Our analyses indicates that epitopes recognized by human mAbs ZIKV-117, ZIKV-15, and ZIKV-19 were highly conserved, suggesting as attractive targets for the development of vaccines and immunotherapeutics directed against diverse Zika strains. In addition, the epitope recognized by ZIKV-E-2A10G6 mAb derived from immunized mice was mostly conserved across Zika strains. Conclusions: Our data provide new insights regarding antigenic similarities between Zika strains circulating worldwide. These data are essential for understanding the impact of evolution on antigenic cross-reactivity between Zika lineages and strains. Further
in-vitro analyses are needed to determine how mutationsat predefined epitopes could impact the development of vaccines that can effectively neutralize Zika viruses.
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Affiliation(s)
- Iman Almansour
- Epidemic Diseases Department-Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, Dammam, Eastern Region, P.O.Box 1982, Dammam 31441, Saudi Arabia
| | - Rahaf Alfares
- Epidemic Diseases Department-Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, Dammam, Eastern Region, P.O.Box 1982, Dammam 31441, Saudi Arabia
| | - Halah Aljofi
- Epidemic Diseases Department-Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, Dammam, Eastern Region, P.O.Box 1982, Dammam 31441, Saudi Arabia
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Abstract
Endothelins were discovered more than thirty years ago as potent vasoactive compounds. Beyond their well-documented cardiovascular properties, however, the contributions of the endothelin pathway have been demonstrated in several neuroinflammatory processes and the peptides have been reported as clinically relevant biomarkers in neurodegenerative diseases. Several studies report that endothelin-1 significantly contributes to the progression of neuroinflammatory processes, particularly during infections in the central nervous system (CNS), and is associated with a loss of endothelial integrity at the blood brain barrier level. Because of the paucity of clinical trials with endothelin-1 antagonists in several infectious and non-infectious neuroinflammatory diseases, it remains an open question whether the 21 amino acid peptide is a mediator/modulator rather than a biomarker of the progression of neurodegeneration. This review focuses on the potential roles of endothelins in the pathology of neuroinflammatory processes, including infectious diseases of viral, bacterial or parasitic origin in which the synthesis of endothelins or its pharmacology have been investigated from the cell to the bedside in several cases, as well as in non-infectious inflammatory processes such as neurodegenerative disorders like Alzheimers Disease or central nervous system vasculitis.
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155
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First Reported Complete Genome Sequence of a Dengue Virus Serotype 4 Strain from Papua New Guinea. Microbiol Resour Announc 2018; 7:MRA01082-18. [PMID: 30533658 PMCID: PMC6256681 DOI: 10.1128/mra.01082-18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 08/31/2018] [Indexed: 11/23/2022] Open
Abstract
A male patient in his 50s who traveled from Papua New Guinea (PNG) to Australia in 2016 was diagnosed with a dengue virus serotype 4 (DENV-4) infection, and the virus was isolated from his acute-phase serum. Here, we describe the first complete genome sequence of a DENV-4 strain from PNG. A male patient in his 50s who traveled from Papua New Guinea (PNG) to Australia in 2016 was diagnosed with a dengue virus serotype 4 (DENV-4) infection, and the virus was isolated from his acute-phase serum. Here, we describe the first complete genome sequence of a DENV-4 strain from PNG.
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156
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Yang CF, Chang SF, Hsu TC, Su CL, Wang TC, Lin SH, Yang SL, Lin CC, Shu PY. Molecular characterization and phylogenetic analysis of dengue viruses imported into Taiwan during 2011-2016. PLoS Negl Trop Dis 2018; 12:e0006773. [PMID: 30235208 PMCID: PMC6168156 DOI: 10.1371/journal.pntd.0006773] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 10/02/2018] [Accepted: 08/21/2018] [Indexed: 01/05/2023] Open
Abstract
A total of 1,596 laboratory-confirmed imported dengue cases were identified in Taiwan during 2011–2016. Most of the imported cases arrived from Southeast Asia as well as the Indian subcontinent, the Pacific region, Latin America, Australia and Africa. Phylogenetic analyses of the complete envelope protein gene sequences from 784 imported dengue virus (DENV) isolates were conducted, and the results suggest that the DENV-1 genotype I and DENV-2 Cosmopolitan genotype comprise the predominant serotype/genotype of DENV strains circulating in Southeast Asia. The DENV-1 genotype III, DENV-3 genotype III and DENV-4 genotype I and II strains were found to be newly emerging in several Southeast Asian countries. Our results also showed that geographical restrictions of DENV-1 genotype I, DENV-1 genotype III and DENV-2 Cosmopolitan genotype are becoming blurred, indicating the extensive introductions and continuous expansions of DENV strains between nations in Southeast Asia. In this study, we present the geographic distribution and dynamic transmission of DENV strains circulating in Southeast Asian countries. In addition, we demonstrated local dengue epidemics caused by several imported DENV strains in Taiwan during 2011–2016. Dengue is the most prevalent mosquito-borne viral disease in the world. The expansion of dengue viruses to different parts of the world has been accelerated by the increase in worldwide travel and trade. In this study, we present the results of a laboratory-based dengue surveillance in Taiwan during 2011–2016. A total of 1,596 laboratory-confirmed imported dengue cases were identified. The travelers were infected in 29 countries in Southeast Asia, the Indian subcontinent, the Pacific region, Latin America, Australia and Africa. Phylogenetic analyses of the envelope gene sequences of 784 imported dengue virus isolates suggest that the DENV-1 genotype I and DENV-2 Cosmopolitan genotype comprise the predominant serotype/genotype DENV strains circulating in Southeast Asia. Our results also showed that geographical restrictions of some of the DENV genotypes are becoming blurred, indicating the extensive introductions and continuous expansions of DENV strains between countries in Southeast Asia. In addition, we demonstrated dengue outbreaks in Taiwan caused by viruses imported from Asia and the Americas. The DENV envelope gene sequences from this study will contribute to a better understanding of the genetic evolution, dynamic transmission and global expansion of dengue viruses.
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Affiliation(s)
- Cheng-Fen Yang
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Ministry of Health and Welfare, Taiwan, Republic of China
| | - Shu-Fen Chang
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Ministry of Health and Welfare, Taiwan, Republic of China
| | - Tung-Chien Hsu
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Ministry of Health and Welfare, Taiwan, Republic of China
| | - Chien-Ling Su
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Ministry of Health and Welfare, Taiwan, Republic of China
| | - Tzy-Chen Wang
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Ministry of Health and Welfare, Taiwan, Republic of China
| | - Shih-Hung Lin
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Ministry of Health and Welfare, Taiwan, Republic of China
| | - Su-Lin Yang
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Ministry of Health and Welfare, Taiwan, Republic of China
| | - Chien-Chou Lin
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Ministry of Health and Welfare, Taiwan, Republic of China
| | - Pei-Yun Shu
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Ministry of Health and Welfare, Taiwan, Republic of China
- * E-mail:
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157
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Bal J, Jung HY, Nguyen LN, Park J, Jang YS, Kim DH. Evaluation of cell-surface displayed synthetic consensus dengue EDIII cells as a potent oral vaccine candidate. Microb Cell Fact 2018; 17:146. [PMID: 30217208 PMCID: PMC6138890 DOI: 10.1186/s12934-018-0994-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 09/10/2018] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Dengue is a rapidly spreading mosquito borne tropical viral disease affecting hundreds of millions of people across the globe annually. The dengue virus (DENV) includes four genetically distinct serotypes that cause serious life-threatening infections, including dengue hemorrhagic fever/dengue shock syndrome. Dengue vaccine development is complicated by the possibility of vaccine-enhanced severe dengue disease due to antibody-dependent enhancement by pre-existing cross-reactivity, as well as homotypic antibodies. Thus, the development of an efficacious dengue vaccine conferring simultaneous and durable immunity to each of the four DENV serotypes has not yet been developed despite years of research. For mass immunization in deeply affected resource-limited countries, oral vaccination is considered more beneficial than conventional approaches. Therefore, in a continuing effort towards designing economical and potent vaccine candidates, the current study applied yeast surface display technology to develop an oral dengue vaccine candidate using whole recombinant yeast cells displaying the recombinant fusion protein of M cell targeting ligand Co1 fused to the synthetic consensus dengue envelope domain III (scEDIII). Female Balb/c mice were orally fed with recombinant yeast cells and immunogenicity in terms of systemic and mucosal immune responses was monitored. RESULTS Immunofluorescence microscopy with dengue specific antibody and fluorescein isothiocyanate-conjugated anti-mouse IgG antibody clearly showed that recombinant protein Co1-scEDIII-AGA was localized on the cell surface of the respective clones in comparison with scEDIII-Co1 and Mock cells with no fluorescence. Oral dosage applications of surface displayed Co1-scEDIII-AGA stimulated a systemic humoral immune response in the form of dengue-specific serum IgG, as well as a mucosal immune response in the form of secretory immunoglobulin A (sIgA). Antigen-specific B cell responses in isolated lymphoid cells from the spleen and Peyer's patches further supported an elevated mucosal immune response. In addition, surface displayed Co1-scEDIII-AGA feeding elicited strong immune responses in comparison with scEDIII-Co1 and Mock following intraperitoneal booster with purified scEDIII antigen. CONCLUSIONS Surface displayed preparations of Co1-scEDIII-AGA induced strong immunogenicity compared with non-displayed scEDIII-Co1. Prior studies have supported the neutralization potential of scEDIII constructs against all four serotypes. Thus, the oral administration of genetically engineered yeast whole cells displaying biologically active Co1-scEDIII fusion protein without any further processing shows prospective as a potent oral vaccine candidate against dengue viral infection.
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Affiliation(s)
- Jyotiranjan Bal
- Institute for Molecular Biology and Genetics, Department of Molecular Biology, Department of Bioactive Material Sciences, Chonbuk National University, Jeonju, Jeollabuk-do 54896 Republic of Korea
| | - Hee-Young Jung
- Institute for Molecular Biology and Genetics, Department of Molecular Biology, Department of Bioactive Material Sciences, Chonbuk National University, Jeonju, Jeollabuk-do 54896 Republic of Korea
| | - Luong Ngoc Nguyen
- Department of Biology, College of Sciences, Hue University, Hue, Vietnam
| | - Jisang Park
- Institute for Molecular Biology and Genetics, Department of Molecular Biology, Department of Bioactive Material Sciences, Chonbuk National University, Jeonju, Jeollabuk-do 54896 Republic of Korea
| | - Yong-Suk Jang
- Institute for Molecular Biology and Genetics, Department of Molecular Biology, Department of Bioactive Material Sciences, Chonbuk National University, Jeonju, Jeollabuk-do 54896 Republic of Korea
| | - Dae-Hyuk Kim
- Institute for Molecular Biology and Genetics, Department of Molecular Biology, Department of Bioactive Material Sciences, Chonbuk National University, Jeonju, Jeollabuk-do 54896 Republic of Korea
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158
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Saleem S, Ali A, Khubaib B, Akram M, Fatima Z, Idrees M. Genetic diversity of Hepatitis C Virus in Pakistan using Next Generation Sequencing. J Clin Virol 2018; 108:26-31. [PMID: 30219747 DOI: 10.1016/j.jcv.2018.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 08/14/2018] [Accepted: 09/07/2018] [Indexed: 01/06/2023]
Abstract
BACKGROUND In Pakistan, HCV disease is considered a major public health issue with about 10-17 million people suffering with this infection and rate is increasing every day without any hindrance. The currently available Pyrosequencing approach used to analyze complex viral genomes as it can determine minor variants. It is crucial to understand viral evolution and quasispecies diversity in complex viral strains. OBJECTIVES To assess genetic diversity in patients with HCV using Next Generation Sequencing (NGS) and compare nucleotide diversity of genotype 3a with respect to other genotypes. STUDY DESIGN Intra-host viral diversity of HCV was determined using NGS from 13 chronically HCV infected individuals. NGS of three different regions (E2 (HVR1), NS3 and NS5B) of HCV-3a allowed for a comprehensive analysis of the viral population. RESULT Phylogenetic analysis of different HCV genes revealed great variability within the Pakistani population. The average nucleotide diversity for HVR1, NS3 and NS5B was 0.029, 0.011 and 0.010 respectively. CONCLUSION Our findings clearly indicate that patient-2 greater quasispecies heterogeneity than other patients of same genotype-3a using phylogenetic and one step network analyses. Initially phylogenetic analysis of these three genes showed that genotype 3a samples have greater genetic diversity. However, no significant difference was determined when nucleotide variability of genotype 3a compared with other genotypes (1a, 1b, 2a & 4a).
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Affiliation(s)
- Sana Saleem
- Division of Molecular Virology and Molecular Centre of Excellence in Molecular Biology (CEMB), University of the Punjab, Lahore 87-West Canal Bank Road Thokar Niaz Baig, Lahore, Pakistan.
| | - Amjad Ali
- Molecular Virology laboratory, Centre for Applied Molecular Biology (CAMB) University of the Punjab, Lahore 87-West Canal Bank Road Thokar Niaz Baig, Lahore, Pakistan.
| | - Bushra Khubaib
- Division of Molecular Virology and Molecular Centre of Excellence in Molecular Biology (CEMB), University of the Punjab, Lahore 87-West Canal Bank Road Thokar Niaz Baig, Lahore, Pakistan; Department of Biotechnology, Lahore College for Women University, Lahore, Pakistan.
| | - Madiha Akram
- Division of Molecular Virology and Molecular Centre of Excellence in Molecular Biology (CEMB), University of the Punjab, Lahore 87-West Canal Bank Road Thokar Niaz Baig, Lahore, Pakistan; Department of Biotechnology, Lahore College for Women University, Lahore, Pakistan.
| | - Zareen Fatima
- Division of Molecular Virology and Molecular Centre of Excellence in Molecular Biology (CEMB), University of the Punjab, Lahore 87-West Canal Bank Road Thokar Niaz Baig, Lahore, Pakistan; Bioinformatics & Biotechnology, International Islamic University, Sector H-10, New Campus, Islamabad, Pakistan.
| | - Muhammad Idrees
- Division of Molecular Virology and Molecular Centre of Excellence in Molecular Biology (CEMB), University of the Punjab, Lahore 87-West Canal Bank Road Thokar Niaz Baig, Lahore, Pakistan; Vice Chancellor Hazara University Mansehra, Khyber Pakhtunkhwa, Pakistan.
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159
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Lei Y, Takeda K, Yu L. Impaired heterologous protein-protein interaction is an essential cause for non-viability of WNV/DENV recombinants. Virology 2018; 524:140-150. [PMID: 30195251 DOI: 10.1016/j.virol.2018.08.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 08/16/2018] [Accepted: 08/17/2018] [Indexed: 10/28/2022]
Abstract
Flavivirus RNA replication starts at 3'-end, where it folds into a highly conserved stem-loop structure. We attempted to identify the viral non-structural proteins (NSPs) that might specifically interact with the 3'-stemloop (3'SL) through a genetic approach. WNV/DENV2 chimeric recombinants that contain Dengue2 (DENV2) gene(s) in West Nile virus (WNV) backbone were tested for replication competence. Three of seven recombinant viruses, containing the DENV2 NS1, NS2A, or NS4B gene and terminated with a mutated 3'SL (MutC 3'SL), were viable. Of these three, only those bearing the DENV2 NS1 and NS2A substitutions remained infectious when the MutC 3'SL was replaced by the wildtype WNV 3'SL. However, none of the seven chimeric recombinants bearing the DENV2 3'SL were viable. We then investigated the causes for failed replication of WNV/DENV2 chimeric recombinants. Proteolytic cleavage of NS polyproteins was defective by heterologous protease NS2B/3, but was efficient by homologous DENV2 NS2B/3 protease. Whereas, the heterologous polyproteins that contained DENV2 homologous protease were found to produce abnormal vesicles. WNV/DENV2 recombinants expressing the DENV2 homologous protease did not produce infectious virus either. We examined NS protein-protein interaction (PPI) and found that heterologous PPI (hPPI) between WNV and DENV2 NSPs were impaired to various degrees. Insufficient PPIs occurred mainly between heterologous NS2B and NS3; NS2B and NS4A; NS3 and NS5, correlating to those non-viability of substitution mutants. Our results indicate that impaired PPI may decrease protease activity and affect vesicle formation, and is the essential cause for non-viability of the WNV/DENV2 recombinants.
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Affiliation(s)
- Yingfen Lei
- Laboratory of Molecular Virology, Center for Biologics Evaluation and Research, Food and Drug Administration, 1401 Rockville Pike, Rockville, MD 20852, USA; Department of Microbiology, The Fourth Military Medical University, 17 Changle Xilu, Xi'an, Shaanxi 710032, PR China
| | - Kazuyo Takeda
- Microscopy and Imaging Core Facility, Office of Vaccines Research and Review Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Li Yu
- Division of Viral Products, Office of Vaccines Research and Review Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA.
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Sevvana M, Long F, Miller AS, Klose T, Buda G, Sun L, Kuhn RJ, Rossmann MG. Refinement and Analysis of the Mature Zika Virus Cryo-EM Structure at 3.1 Å Resolution. Structure 2018; 26:1169-1177.e3. [PMID: 29958768 PMCID: PMC6125166 DOI: 10.1016/j.str.2018.05.006] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 04/26/2018] [Accepted: 05/14/2018] [Indexed: 02/07/2023]
Abstract
Among the several arthropod-borne human flaviviral diseases, the recent outbreak of Zika virus (ZIKV) has caused devastating birth defects and neurological disorders, challenging the world with another major public health concern. We report here the refined structure of the mature ZIKV at a resolution of 3.1 Å as determined by cryo-electron microscopic single-particle reconstruction. The improvement in the resolution, compared with previous enveloped virus structures, was the result of optimized virus preparation methods and data processing techniques. The glycoprotein interactions and surface properties of ZIKV were compared with other mosquito-borne flavivirus structures. The largest structural differences and sequence variations occur at the glycosylation loop associated with receptor binding. Probable drug binding pockets were identified on the viral surface. These results also provide a structural basis for the design of vaccines against ZIKV.
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Affiliation(s)
- Madhumati Sevvana
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Feng Long
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Andrew S Miller
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Thomas Klose
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Geeta Buda
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Lei Sun
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Richard J Kuhn
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Michael G Rossmann
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA.
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161
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Hassert M, Wolf KJ, Schwetye KE, DiPaolo RJ, Brien JD, Pinto AK. CD4+T cells mediate protection against Zika associated severe disease in a mouse model of infection. PLoS Pathog 2018; 14:e1007237. [PMID: 30212537 PMCID: PMC6136803 DOI: 10.1371/journal.ppat.1007237] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 07/23/2018] [Indexed: 12/12/2022] Open
Abstract
Zika virus (ZIKV) has gained worldwide attention since it emerged, and a global effort is underway to understand the correlates of protection and develop diagnostics to identify rates of infection. As new therapeutics and vaccine approaches are evaluated in clinical trials, additional effort is focused on identifying the adaptive immune correlates of protection against ZIKV disease. To aid in this endeavor we have begun to dissect the role of CD4+T cells in the protection against neuroinvasive ZIKV disease. We have identified an important role for CD4+T cells in protection, demonstrating that in the absence of CD4+T cells mice have more severe neurological sequela and significant increases in viral titers in the central nervous system (CNS). The transfer of CD4+T cells from ZIKV immune mice protect type I interferon receptor deficient animals from a lethal challenge; showing that the CD4+T cell response is necessary and sufficient for control of ZIKV disease. Using a peptide library spanning the complete ZIKV polyprotein, we identified both ZIKV-encoded CD4+T cell epitopes that initiate immune responses, and ZIKV specific CD4+T cell receptors that recognize these epitopes. Within the ZIKV antigen-specific TCRβ repertoire, we uncovered a high degree of diversity both in response to a single epitope and among different mice responding to a CD4+T cell epitope. Overall this study identifies a novel role for polyfunctional and polyclonal CD4+T cells in providing protection against ZIKV infection and highlights the need for vaccines to develop robust CD4+T cell responses to prevent ZIKV neuroinvasion and limit replication within the CNS.
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MESH Headings
- Adoptive Transfer
- Amino Acid Sequence
- Animals
- Antigens, Viral/genetics
- Antigens, Viral/immunology
- CD4-Positive T-Lymphocytes/immunology
- Central Nervous System/immunology
- Central Nervous System/virology
- Disease Models, Animal
- Epitopes, T-Lymphocyte/genetics
- Epitopes, T-Lymphocyte/immunology
- Genes, T-Cell Receptor beta
- Humans
- Immunity, Cellular
- Liver/immunology
- Liver/virology
- Lymphocyte Depletion
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Receptor, Interferon alpha-beta/deficiency
- Receptor, Interferon alpha-beta/genetics
- Receptor, Interferon alpha-beta/immunology
- Viral Vaccines/immunology
- Virus Replication/immunology
- Zika Virus/genetics
- Zika Virus/immunology
- Zika Virus/pathogenicity
- Zika Virus Infection/genetics
- Zika Virus Infection/immunology
- Zika Virus Infection/prevention & control
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Affiliation(s)
- Mariah Hassert
- Department of Molecular Microbiology and Immunology, Saint Louis University, St Louis, Missouri, United States of America
| | - Kyle J. Wolf
- Department of Molecular Microbiology and Immunology, Saint Louis University, St Louis, Missouri, United States of America
| | - Katherine E. Schwetye
- Department of Pathology, Saint Louis University, St. Louis, Missouri, United States of America
| | - Richard J. DiPaolo
- Department of Molecular Microbiology and Immunology, Saint Louis University, St Louis, Missouri, United States of America
| | - James D. Brien
- Department of Molecular Microbiology and Immunology, Saint Louis University, St Louis, Missouri, United States of America
| | - Amelia K. Pinto
- Department of Molecular Microbiology and Immunology, Saint Louis University, St Louis, Missouri, United States of America
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162
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Klitting R, Fischer C, Drexler JF, Gould EA, Roiz D, Paupy C, de Lamballerie X. What Does the Future Hold for Yellow Fever Virus? (II). Genes (Basel) 2018; 9:E425. [PMID: 30134625 PMCID: PMC6162518 DOI: 10.3390/genes9090425] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 08/13/2018] [Accepted: 08/16/2018] [Indexed: 02/06/2023] Open
Abstract
As revealed by the recent resurgence of yellow fever virus (YFV) activity in the tropical regions of Africa and South America, YFV control measures need urgent rethinking. Over the last decade, most reported outbreaks occurred in, or eventually reached, areas with low vaccination coverage but that are suitable for virus transmission, with an unprecedented risk of expansion to densely populated territories in Africa, South America and Asia. As reflected in the World Health Organization's initiative launched in 2017, it is high time to strengthen epidemiological surveillance to monitor accurately viral dissemination, and redefine vaccination recommendation areas. Vector-control and immunisation measures need to be adapted and vaccine manufacturing must be reconciled with an increasing demand. We will have to face more yellow fever (YF) cases in the upcoming years. Hence, improving disease management through the development of efficient treatments will prove most beneficial. Undoubtedly, these developments will require in-depth descriptions of YFV biology at molecular, physiological and ecological levels. This second section of a two-part review describes the current state of knowledge and gaps regarding the molecular biology of YFV, along with an overview of the tools that can be used to manage the disease at the individual, local and global levels.
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Affiliation(s)
- Raphaëlle Klitting
- Unité des Virus Émergents (UVE: Aix-Marseille Univ⁻IRD 190⁻Inserm 1207⁻IHU Méditerranée Infection), 13385 Marseille CEDEX 05, France.
| | - Carlo Fischer
- Charité-Universitätsmedizin Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Virology, 10117 Berlin, Germany.
- German Center for Infection Research (DZIF), 38124 Braunschweig, Germany.
| | - Jan F Drexler
- Charité-Universitätsmedizin Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Virology, 10117 Berlin, Germany.
- German Center for Infection Research (DZIF), 38124 Braunschweig, Germany.
- Martsinovsky Institute of Medical Parasitology, Tropical and Vector Borne Diseases, Sechenov University, 119991 Moscow, Russia.
| | - Ernest A Gould
- Unité des Virus Émergents (UVE: Aix-Marseille Univ⁻IRD 190⁻Inserm 1207⁻IHU Méditerranée Infection), 13385 Marseille CEDEX 05, France.
| | - David Roiz
- UMR Maladies Infectieuses et Vecteurs: Écologie, Génétique Évolution et Contrôle (MIVEGEC: IRD, CNRS, Univ. Montpellier), 34394 Montpellier, France.
| | - Christophe Paupy
- UMR Maladies Infectieuses et Vecteurs: Écologie, Génétique Évolution et Contrôle (MIVEGEC: IRD, CNRS, Univ. Montpellier), 34394 Montpellier, France.
| | - Xavier de Lamballerie
- Unité des Virus Émergents (UVE: Aix-Marseille Univ⁻IRD 190⁻Inserm 1207⁻IHU Méditerranée Infection), 13385 Marseille CEDEX 05, France.
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163
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Šebera J, Dubankova A, Sychrovský V, Ruzek D, Boura E, Nencka R. The structural model of Zika virus RNA-dependent RNA polymerase in complex with RNA for rational design of novel nucleotide inhibitors. Sci Rep 2018; 8:11132. [PMID: 30042483 PMCID: PMC6057956 DOI: 10.1038/s41598-018-29459-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 07/09/2018] [Indexed: 12/30/2022] Open
Abstract
Zika virus is a global health threat due to significantly elevated risk of fetus malformations in infected pregnant women. Currently, neither an effective therapy nor a prophylactic vaccination is available for clinical use, desperately necessitating novel therapeutics and approaches to obtain them. Here, we present a structural model of the Zika virus RNA-dependent RNA polymerase (ZIKV RdRp) in complex with template and nascent RNAs, Mg2+ ions and accessing nucleoside triphosphate. The model allowed for docking studies aimed at effective pre-screening of potential inhibitors of ZIKV RdRp. Applicability of the structural model for docking studies was illustrated with the NITD008 artificial nucleotide that is known to effectively inhibit the function of the ZIKV RdRp. The ZIKV RdRp – RNA structural model is provided for all possible variations of the nascent RNA bases pairs to enhance its general utility in docking and modelling experiments. The developed model makes the rational design of novel nucleosides and nucleotide analogues feasible and thus provides a solid platform for the development of advanced antiviral therapy.
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Affiliation(s)
- Jakub Šebera
- Gilead Sciences Research Centre at IOCB Prague, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Praha, Czech Republic
| | - Anna Dubankova
- Gilead Sciences Research Centre at IOCB Prague, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Praha, Czech Republic
| | - Vladimír Sychrovský
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Praha, Czech Republic
| | - Daniel Ruzek
- Veterinary Research Institute, Hudcova 70, CZ-62100, Brno, Czech Republic.,Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branisovska 31, CZ-37005, Ceske Budejovice, Czech Republic
| | - Evzen Boura
- Gilead Sciences Research Centre at IOCB Prague, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Praha, Czech Republic.
| | - Radim Nencka
- Gilead Sciences Research Centre at IOCB Prague, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Praha, Czech Republic.
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164
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Clain E, Sinigaglia L, Koishi AC, Gorgette O, Gadea G, Viranaicken W, Krejbich-Trotot P, Mavingui P, Desprès P, Nunes Duarte Dos Santos C, Guiraud P, Jouvenet N, El Kalamouni C. Extract from Aphloia theiformis, an edible indigenous plant from Reunion Island, impairs Zika virus attachment to the host cell surface. Sci Rep 2018; 8:10856. [PMID: 30022045 PMCID: PMC6052117 DOI: 10.1038/s41598-018-29183-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 07/06/2018] [Indexed: 01/05/2023] Open
Abstract
The mosquito-borne Zika virus (ZIKV) belongs to the flavivirus genus of the Flaviviridae family. Contemporary epidemic strains of ZIKV are associated with congenital malformations in infants, including microcephaly, as well as Guillain-Barré syndrome in adults. A risk of human-to-human transmission of ZIKV is also well documented. A worldwide research effort has been undertaken to identify safe and effective strategies to prevent or treat ZIKV infection. We show here that extract from Aphloia theiformis, an edible endemic plant from Indian Ocean islands, exerts a potent antiviral effect against ZIKV strains of African and Asian lineages, including epidemic strains. The antiviral effect of A. theiformis extract was extended to clinical isolates of dengue virus (DENV) of the four serotypes in human hepatocytes. A. theiformis inhibited virus entry in host cells by acting directly on viral particles, thus impairing their attachment to the cell surface. Electron microscopic observations revealed that organization of ZIKV particles was severely affected by A. theiformis. We propose a model of antiviral action for A. theiformis against flaviviruses that highlights the potential of medicinal plants as promising sources of naturally-derived antiviral compounds to prevent ZIKV and DENV infections.
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Affiliation(s)
- Elodie Clain
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | - Laura Sinigaglia
- UMR CNRS 3569, Viral Genomics and Vaccination Unit, Pasteur Institute, 75724, Paris, France
| | - Andrea Cristine Koishi
- Laboratorio de Virologia Molecular, Instituto Carlos Chagas, ICC/FIOCRUZ/PR, Curitiba, Parana, Brazil
| | - Olivier Gorgette
- Ultrastructural BioImaging (UTechsUBI), Pasteur Institute, 75724, Paris, France
| | - Gilles Gadea
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | - Wildriss Viranaicken
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | - Pascale Krejbich-Trotot
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | - Patrick Mavingui
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | - Philippe Desprès
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | | | - Pascale Guiraud
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | - Nolwenn Jouvenet
- UMR CNRS 3569, Viral Genomics and Vaccination Unit, Pasteur Institute, 75724, Paris, France
| | - Chaker El Kalamouni
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France.
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165
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Negligible contribution of M2634V substitution to ZIKV pathogenesis in AG6 mice revealed by a bacterial promoter activity reduced infectious clone. Sci Rep 2018; 8:10491. [PMID: 30002446 PMCID: PMC6043478 DOI: 10.1038/s41598-018-28890-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 06/19/2018] [Indexed: 01/10/2023] Open
Abstract
ZIKV has emerged as a significant human pathogene for the severe neurological complications, including Guillain-Barré(GBS) syndrome in adults and a variety of fetal abnormalities such as microcephaly. A stable and efficient infectious clone of Brazilian ZIKV isolate is required to study pathogenesis of epidemic ZIKV and virus evolution impact on it. Here we successfully constructed infectious cDNA clone on an early Brazilian isolate by eliminating the activity of predicted bacterial promoter in 1–3000 nt of ZIKV genome, leading to a stable infectious cDNA clone (pZL1). pZL1 derived virus could infect different cell lines and cause lethal effect to AG6 mice. We further investigated the role of a recent emerged substitution in NS5 (M2634V). We found that a reverse mutation (V2634M) caused negligible effect on the ZIKV viral genome replication and infectious progeny production in multiple cell culture systems. Additionally, this mutation did not alter the pathogenesis feature and virulence of ZIKV in AG6 mice. In summary, our results present another robust infectious ZIKV clone from Brazilian isolate and provide evidences to support that M2634V single mutation did not alter virus life cycle in cell culture and pathogenesis in AG6 mouse model.
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166
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Douam F, Ploss A. Yellow Fever Virus: Knowledge Gaps Impeding the Fight Against an Old Foe. Trends Microbiol 2018; 26:913-928. [PMID: 29933925 DOI: 10.1016/j.tim.2018.05.012] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 05/07/2018] [Accepted: 05/22/2018] [Indexed: 12/11/2022]
Abstract
Yellow fever (YF) was one of the most dangerous infectious diseases of the 18th and 19th centuries, resulting in mass casualties in Africa and the Americas. The etiologic agent is yellow fever virus (YFV), and its live-attenuated form, YFV-17D, remains one of the most potent vaccines ever developed. During the first half of the 20th century, vaccination combined with mosquito control eradicated YFV transmission in urban areas. However, the recent 2016-2018 outbreaks in areas with historically low or no YFV activity have raised serious concerns for an estimated 400-500 million unvaccinated people who now live in at-risk areas. Once a forgotten disease, we highlight here that YF still represents a very real threat to human health and economies. As many gaps remain in our understanding of how YFV interacts with the human host and causes disease, there is an urgent need to address these knowledge gaps and propel YFV research forward.
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Affiliation(s)
- Florian Douam
- Department of Molecular Biology, Princeton University, 110 Lewis Thomas Laboratory, Washington Road, Princeton, NJ 08544, USA
| | - Alexander Ploss
- Department of Molecular Biology, Princeton University, 110 Lewis Thomas Laboratory, Washington Road, Princeton, NJ 08544, USA.
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167
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Krol E, Pastuch-Gawolek G, Chaubey B, Brzuska G, Erfurt K, Szewczyk B. Novel Uridine Glycoconjugates, Derivatives of 4-Aminophenyl 1-Thioglycosides, as Potential Antiviral Compounds. Molecules 2018; 23:molecules23061435. [PMID: 29899276 PMCID: PMC6100568 DOI: 10.3390/molecules23061435] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/02/2018] [Accepted: 06/10/2018] [Indexed: 01/19/2023] Open
Abstract
A novel series of uridine glycoconjugates, derivatives of 4-aminophenyl 1-thioglycosides, was designed and synthesized. All compounds were evaluated in vitro for their antiviral activity against hepatitis C virus (HCV) and classical swine fever virus (CSFV), two important human and animal viral pathogens for which new or improved therapeutic options are needed. The antiviral activity of all synthesized compounds was confirmed using pseudo-plaque reduction assays in which a significant arrest of CSFV and HCV growth was observed in the presence of these compounds. Two of the synthesized compounds, 9 and 12, displayed a significant inhibitory effect on HCV and CSFV propagation with IC50 values of 4.9 and 13.5 µM for HCV and 4.2 and 4 µM for CSFV, respectively, with low cytotoxicity. Using various infection and replication models, we have shown that both compounds were able to significantly reduce viral genome replication by up to 90% with IC50 values in the low micromolar range. A structure activity analysis of the synthesized compounds showed that the high antiviral activity was attributed to the hydrophobicity of glycoconjugates and the introduction of elements capable to coordinate metal ions into the spacer connecting the sugar and uridine moiety, which can be useful in the development of new antiviral compounds in the future.
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Affiliation(s)
- Ewelina Krol
- Department of Recombinant Vaccines, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307 Gdansk, Poland.
| | - Gabriela Pastuch-Gawolek
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100 Gliwice, Poland.
- Biotechnology Center, Silesian University of Technology, Krzywoustego 8, 44-100 Gliwice, Poland.
| | - Binay Chaubey
- Department of Recombinant Vaccines, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307 Gdansk, Poland.
- Functional Genomics Lab., Centre for Advanced Study, Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, 700019 Kolkata, India.
| | - Gabriela Brzuska
- Department of Recombinant Vaccines, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307 Gdansk, Poland.
| | - Karol Erfurt
- Department of Chemical Organic Technology and Petrochemistry, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100 Gliwice, Poland.
| | - Boguslaw Szewczyk
- Department of Recombinant Vaccines, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307 Gdansk, Poland.
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168
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da Silva S, Oliveira Silva Martins D, Jardim ACG. A Review of the Ongoing Research on Zika Virus Treatment. Viruses 2018; 10:E255. [PMID: 29758005 PMCID: PMC5977248 DOI: 10.3390/v10050255] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 04/11/2018] [Accepted: 04/14/2018] [Indexed: 12/17/2022] Open
Abstract
The Zika fever is an arboviral disease resulting from the infection with Zika virus (ZIKV). The virus is transmitted to humans by the bite of Aedes mosquitos, mainly Aedes aegypti and Aedes albopictus. ZIKV has been detected for decades in African and Asian regions and, since 2007, has spread to other continents; among them, infections are most reported in the Americas. This can be explained by the presence of vectors in highly populated and tropical regions where people are susceptible to contamination. ZIKV has been considered by the World Health Organization a serious public health problem because of the increasing number of cases of congenital malformation and neurological disorders related to its infection, such as microcephaly, Guillain⁻Barré syndrome, meningoencephalitis, and myelitis. There is no vaccine or specific antiviral against ZIKV. The infection is best prevented by avoiding mosquito bite, and the treatment of infected patients is palliative. In this context, the search for efficient antivirals is necessary but remains challenging. Here, we aim to review the molecules that have been described to interfere with ZIKV life cycle and discuss their potential use in ZIKV therapy.
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Affiliation(s)
- Suely da Silva
- Laboratory of Virology, Institute of Biomedical Science, ICBIM, Federal University of Uberlândia, Uberlândia, MG 38405-302, Brazil.
- Genomics Study Laboratory, São Paulo State University, IBILCE, São José do Rio Preto, SP 15054-000, Brazil.
| | - Daniel Oliveira Silva Martins
- Laboratory of Virology, Institute of Biomedical Science, ICBIM, Federal University of Uberlândia, Uberlândia, MG 38405-302, Brazil.
- Genomics Study Laboratory, São Paulo State University, IBILCE, São José do Rio Preto, SP 15054-000, Brazil.
| | - Ana Carolina Gomes Jardim
- Laboratory of Virology, Institute of Biomedical Science, ICBIM, Federal University of Uberlândia, Uberlândia, MG 38405-302, Brazil.
- Genomics Study Laboratory, São Paulo State University, IBILCE, São José do Rio Preto, SP 15054-000, Brazil.
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169
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Structural Transition and Antibody Binding of EBOV GP and ZIKV E Proteins from Pre-Fusion to Fusion-Initiation State. Biomolecules 2018; 8:biom8020025. [PMID: 29748487 PMCID: PMC6022868 DOI: 10.3390/biom8020025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/04/2018] [Accepted: 05/07/2018] [Indexed: 11/17/2022] Open
Abstract
Membrane fusion proteins are responsible for viral entry into host cells—a crucial first step in viral infection. These proteins undergo large conformational changes from pre-fusion to fusion-initiation structures, and, despite differences in viral genomes and disease etiology, many fusion proteins are arranged as trimers. Structural information for both pre-fusion and fusion-initiation states is critical for understanding virus neutralization by the host immune system. In the case of Ebola virus glycoprotein (EBOV GP) and Zika virus envelope protein (ZIKV E), pre-fusion state structures have been identified experimentally, but only partial structures of fusion-initiation states have been described. While the fusion-initiation structure is in an energetically unfavorable state that is difficult to solve experimentally, the existing structural information combined with computational approaches enabled the modeling of fusion-initiation state structures of both proteins. These structural models provide an improved understanding of four different neutralizing antibodies in the prevention of viral host entry.
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170
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Freire CCDM, Palmisano G, Braconi CT, Cugola FR, Russo FB, Beltrão-Braga PC, Iamarino A, Lima Neto DFD, Sall AA, Rosa-Fernandes L, Larsen MR, Zanotto PMDA. NS1 codon usage adaptation to humans in pandemic Zika virus. Mem Inst Oswaldo Cruz 2018; 113:e170385. [PMID: 29768530 PMCID: PMC5942634 DOI: 10.1590/0074-02760170385] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 02/20/2018] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Zika virus (ZIKV) was recognised as a zoonotic pathogen in Africa and southeastern Asia. Human infections were infrequently reported until 2007, when the first known epidemic occurred in Micronesia. After 2013, the Asian lineage of ZIKV spread along the Pacific Islands and Americas, causing severe outbreaks with millions of human infections. The recent human infections of ZIKV were also associated with severe complications, such as an increase in cases of Guillain-Barre syndrome and the emergence of congenital Zika syndrome. OBJECTIVES To better understand the recent and rapid expansion of ZIKV, as well as the presentation of novel complications, we compared the genetic differences between the African sylvatic lineage and the Asian epidemic lineage that caused the recent massive outbreaks. FINDINGS The epidemic lineages have significant codon adaptation in NS1 gene to translate these proteins in human and Aedes aegypti mosquito cells compared to the African zoonotic lineage. Accordingly, a Brazilian epidemic isolate (ZBR) produced more NS1 protein than the MR766 African lineage (ZAF) did, as indicated by proteomic data from infections of neuron progenitor cells-derived neurospheres. Although ZBR replicated more efficiently in these cells, the differences observed in the stoichiometry of ZIKV proteins were not exclusively explained by the differences in viral replication between the lineages. MAIN CONCLUSIONS Our findings suggest that natural, silent translational selection in the second half of 20th century could have improved the fitness of Asian ZIKV lineage in human and mosquito cells.
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Affiliation(s)
| | - Giuseppe Palmisano
- Universidade de São Paulo, Instituto de Ciências Biomédicas, Departamento de Parasitologia, São Paulo, SP, Brasil
| | - Carla T Braconi
- Universidade de São Paulo, Instituto de Ciências Biomédicas, Departamento de Microbiologia, Laboratório de Evolução Molecular e Bioinformática, São Paulo, SP, Brasil
| | - Fernanda R Cugola
- Universidade de São Paulo, Laboratório de Células-Tronco, Departamento de Cirurgia, São Paulo, SP, Brasil
| | - Fabiele B Russo
- Universidade de São Paulo, Laboratório de Células-Tronco, Departamento de Cirurgia, São Paulo, SP, Brasil
| | - Patricia Cb Beltrão-Braga
- Universidade de São Paulo, Laboratório de Células-Tronco, Departamento de Cirurgia, São Paulo, SP, Brasil.,Universidade de São Paulo, Escola de Artes, Ciências e Humanidades, Departamento de Obstetrícia, São Paulo, SP, Brasil
| | - Atila Iamarino
- Universidade de São Paulo, Instituto de Ciências Biomédicas, Departamento de Microbiologia, Laboratório de Evolução Molecular e Bioinformática, São Paulo, SP, Brasil
| | - Daniel Ferreira de Lima Neto
- Universidade de São Paulo, Instituto de Ciências Biomédicas, Departamento de Microbiologia, Laboratório de Evolução Molecular e Bioinformática, São Paulo, SP, Brasil
| | | | - Livia Rosa-Fernandes
- University of Southern Denmark, Department of Biochemistry and Molecular Biology, Odense, Denmark
| | - Martin R Larsen
- University of Southern Denmark, Department of Biochemistry and Molecular Biology, Odense, Denmark
| | - Paolo Marinho de Andrade Zanotto
- Universidade de São Paulo, Instituto de Ciências Biomédicas, Departamento de Microbiologia, Laboratório de Evolução Molecular e Bioinformática, São Paulo, SP, Brasil
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171
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Chen S, Yang C, Zhang W, Mahalingam S, Wang M, Cheng A. Flaviviridae virus nonstructural proteins 5 and 5A mediate viral immune evasion and are promising targets in drug development. Pharmacol Ther 2018; 190:1-14. [PMID: 29742479 DOI: 10.1016/j.pharmthera.2018.05.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Infections with viruses in the Flaviviridae family have a vast global and economic impact because of the high morbidity and mortality. The pathogenesis of Flaviviridae infections is very complex and not fully understood because these viruses can inhibit multiple immune pathways including the complement system, NK cells, and IFN induction and signalling pathways. The non-structural (NS) 5 and 5A proteins of Flaviviridae viruses are highly conserved and play an important role in resisting host immunity through various evasion mechanisms. This review summarizes the strategies used by the NS5 and 5A proteins of Flaviviridae viruses for evading the innate immune response by inhibiting pattern recognition receptor (PRR) signalling pathways (TLR/MyD88, IRF7), suppressing interferon (IFN) signalling pathways (IFN-γRs, STAT1, STAT2), and impairing the function of IFN-stimulated genes (ISGs) (e.g. protein kinase R [PKR], oligoadenylate synthase [OAS]). All of these immune evasion mechanisms depend on the interaction of NS5 or NS5A with cellular proteins, such as MyD88 and IRF7, IFN-αRs, IFN-γRs, STAT1, STAT2, PKR and OAS. NS5 is the most attractive target for the discovery of broad spectrum compounds against Flaviviridae virus infection. The methyltransferase (MTase) and RNA-dependent RNA polymerase (RdRp) activities of NS5 are the main therapeutic targets for antiviral drugs against Flaviviridae virus infection. Based on our site mapping, the sites involved in immune evasion provide some potential and promising targets for further novel antiviral therapeutics.
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Affiliation(s)
- Shun Chen
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; Research Center of Avian Disease, College of Veterinary Medicine of Sichuan Agricultural University, Chengdu, Sichuan 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan 611130, China.
| | - Chao Yang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Wei Zhang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Suresh Mahalingam
- Emerging Viruses and Inflammation Research Group, Institute for Glycomics, Griffith University, Gold Coast, Australia
| | - Mingshu Wang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; Research Center of Avian Disease, College of Veterinary Medicine of Sichuan Agricultural University, Chengdu, Sichuan 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan 611130, China
| | - Anchun Cheng
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; Research Center of Avian Disease, College of Veterinary Medicine of Sichuan Agricultural University, Chengdu, Sichuan 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan 611130, China.
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172
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Panwar U, Singh SK. An Overview on Zika Virus and the Importance of Computational Drug Discovery. JOURNAL OF EXPLORATORY RESEARCH IN PHARMACOLOGY 2018; 3:43-51. [DOI: 10.14218/jerp.2017.00025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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173
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Pollett S, Melendrez MC, Maljkovic Berry I, Duchêne S, Salje H, Cummings DAT, Jarman RG. Understanding dengue virus evolution to support epidemic surveillance and counter-measure development. INFECTION GENETICS AND EVOLUTION 2018; 62:279-295. [PMID: 29704626 DOI: 10.1016/j.meegid.2018.04.032] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 04/20/2018] [Accepted: 04/24/2018] [Indexed: 11/30/2022]
Abstract
Dengue virus (DENV) causes a profound burden of morbidity and mortality, and its global burden is rising due to the co-circulation of four divergent DENV serotypes in the ecological context of globalization, travel, climate change, urbanization, and expansion of the geographic range of the Ae.aegypti and Ae.albopictus vectors. Understanding DENV evolution offers valuable opportunities to enhance surveillance and response to DENV epidemics via advances in RNA virus sequencing, bioinformatics, phylogenetic and other computational biology methods. Here we provide a scoping overview of the evolution and molecular epidemiology of DENV and the range of ways that evolutionary analyses can be applied as a public health tool against this arboviral pathogen.
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Affiliation(s)
- S Pollett
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD, USA; Marie Bashir Institute, University of Sydney, NSW, Australia; Institute for Global Health Sciences, University of California at San Francisco, CA, USA.
| | - M C Melendrez
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD, USA
| | - I Maljkovic Berry
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD, USA
| | - S Duchêne
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Australia
| | - H Salje
- Institut Pasteur, Paris, France; Johns Hopkins School of Public Health, Baltimore, MD, USA
| | - D A T Cummings
- Johns Hopkins School of Public Health, Baltimore, MD, USA; University of Florida, FL, USA
| | - R G Jarman
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD, USA
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174
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Acosta-Ampudia Y, Monsalve DM, Castillo-Medina LF, Rodríguez Y, Pacheco Y, Halstead S, Willison HJ, Anaya JM, Ramírez-Santana C. Autoimmune Neurological Conditions Associated With Zika Virus Infection. Front Mol Neurosci 2018; 11:116. [PMID: 29695953 PMCID: PMC5904274 DOI: 10.3389/fnmol.2018.00116] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 03/26/2018] [Indexed: 12/20/2022] Open
Abstract
Zika virus (ZIKV) is an emerging flavivirus rapidly spreading throughout the tropical Americas. Aedes mosquitoes is the principal way of transmission of the virus to humans. ZIKV can be spread by transplacental, perinatal, and body fluids. ZIKV infection is often asymptomatic and those with symptoms present minor illness after 3 to 12 days of incubation, characterized by a mild and self-limiting disease with low-grade fever, conjunctivitis, widespread pruritic maculopapular rash, arthralgia and myalgia. ZIKV has been linked to a number of central and peripheral nervous system injuries such as Guillain-Barré syndrome (GBS), transverse myelitis (TM), meningoencephalitis, ophthalmological manifestations, and other neurological complications. Nevertheless, mechanisms of host-pathogen neuro-immune interactions remain incompletely elucidated. This review provides a critical discussion about the possible mechanisms underlying the development of autoimmune neurological conditions associated with Zika virus infection.
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Affiliation(s)
- Yeny Acosta-Ampudia
- Center for Autoimmune Diseases Research, School of Medicine and Health Sciences, Universidad del Rosario, Bogota, Colombia
| | - Diana M Monsalve
- Center for Autoimmune Diseases Research, School of Medicine and Health Sciences, Universidad del Rosario, Bogota, Colombia
| | - Luis F Castillo-Medina
- Center for Autoimmune Diseases Research, School of Medicine and Health Sciences, Universidad del Rosario, Bogota, Colombia
| | - Yhojan Rodríguez
- Center for Autoimmune Diseases Research, School of Medicine and Health Sciences, Universidad del Rosario, Bogota, Colombia
| | - Yovana Pacheco
- Center for Autoimmune Diseases Research, School of Medicine and Health Sciences, Universidad del Rosario, Bogota, Colombia
| | - Susan Halstead
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Hugh J Willison
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Juan-Manuel Anaya
- Center for Autoimmune Diseases Research, School of Medicine and Health Sciences, Universidad del Rosario, Bogota, Colombia
| | - Carolina Ramírez-Santana
- Center for Autoimmune Diseases Research, School of Medicine and Health Sciences, Universidad del Rosario, Bogota, Colombia
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175
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The Flavonoid Isoquercitrin Precludes Initiation of Zika Virus Infection in Human Cells. Int J Mol Sci 2018; 19:ijms19041093. [PMID: 29621184 PMCID: PMC5979602 DOI: 10.3390/ijms19041093] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/23/2018] [Accepted: 04/03/2018] [Indexed: 11/16/2022] Open
Abstract
The medical importance of Zika virus (ZIKV) was fully highlighted during the recent epidemics in South Pacific islands and Americas due to ZIKV association with severe damage to fetal brain development and neurological complications in adult patients. A worldwide research effort has been undertaken to identify effective compounds to prevent or treat ZIKV infection. Fruits and vegetables may be sources of compounds with medicinal properties. Flavonoids are one class of plant compounds that emerge as promising antiviral molecules against ZIKV. In the present study, we demonstrated that flavonoid isoquercitrin exerts antiviral activity against African historical and Asian epidemic strains of ZIKV in human hepatoma, epithelial, and neuroblastoma cell lines. Time-of-drug addition assays showed that isoquercitrin acts on ZIKV entry by preventing the internalisation of virus particles into the host cell. Our data also suggest that the glycosylated moiety of isoquercitrin might play a role in the antiviral effect of the flavonoid against ZIKV. Our results highlight the importance of isoquercitrin as a promising natural antiviral compound to prevent ZIKV infection.
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176
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Mohan M, Haribalaganesh R, Coico R, Sundar K. HLA-directed bioinformatics approach for genome-wide mapping of dengue CTL epitopes. Future Virol 2018. [DOI: 10.2217/fvl-2017-0157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aim: In silico approach was used to predict cytotoxic T lymphocyte (CTL) epitopes from the proteome of all four dengue serotypes. Methods: The immune epitope database analysis resource was used to analyze the CTL epitopes of dengue serotypes. The prediction of epitopes was done against nine high frequency HLA class I alleles occurring worldwide. Results: A total of 2784 epitopes were predicted from all four dengue virus proteomes. Immune epitope database analysis resource tool predicted 202 epitopes as positive for immunogenecity. A total of 39 of 257 consensus epitopes predicted were present in all four serotypes. This study identified nine new class I-restricted epitopes. Conclusion: Mapping of these potentially immunogenic dengue epitopes paves the way for future investigation of their utility as vaccine candidates to prevent or treat dengue virus infections.
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Affiliation(s)
- Manikandan Mohan
- Department of Biotechnology, Kalasalingam University, Krishnankoil, 626 126, Tamil Nadu, India
| | | | - Richard Coico
- Department of Cell Biology, SUNY Downstate Medical Center, Brooklyn, NY 11203, USA
| | - Krishnan Sundar
- Department of Biotechnology, Kalasalingam University, Krishnankoil, 626 126, Tamil Nadu, India
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177
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Sun M, Dong J, Li L, Lin Q, Sun J, Liu Z, Shen H, Zhang J, Ren T, Zhang C. Recombinant Newcastle disease virus (NDV) expressing Duck Tembusu virus (DTMUV) pre-membrane and envelope proteins protects ducks against DTMUV and NDV challenge. Vet Microbiol 2018; 218:60-69. [PMID: 29685222 PMCID: PMC7117350 DOI: 10.1016/j.vetmic.2018.03.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 03/23/2018] [Accepted: 03/27/2018] [Indexed: 12/17/2022]
Abstract
Firstly generated a NDV-vectored Duck Tembusu Virus (DTMUV) bivalent vaccine that expressing the pre-membrane and envelope proteins of DTMUV. Evaluated the efficacy of the NDV-vectored Duck Tembusu Virus bivalent vaccine. Provided a new method for NDV and DTMUV controlling in waterfowl.
The newly emerged Duck Tembusu virus (DTMUV) is responsible for considerable economic loss in waterfowl-raising areas in China since 2010. Meanwhile, the virulent Newcastle disease virus (NDV) has also caused sporadic outbreaks in waterfowl. The individual vaccines against both diseases are available, however, there is no bivalent or combined vaccine for either disease. Here, we constructed a recombinant NDV-vectored vaccine candidate that expresses the pre-membrane (prM) and envelope (E) genes from DTMUV, designated as aGM/prM + E. The foreign prM and E proteins were stably expressed in aGM/prM + E and exhibited similar pathogenicity but higher growth kinetics than those of the parental virus. The aGM/prM + E carries a fusion cleavage site in accordance with avirulent viruses that have been frequently isolated from waterfowl, and induced remarkably (p < 0.001) higher NDV-specific hemagglutination inhibition (HI) titers than commercially available live NDV vaccines (LaSota strain). The aGM/prM + E also elicited significantly higher (p < 0.05) virus neutralization (VN) titers than commercially available DTMUV inactivated vaccines (HB strain). The aGM/prM + E not only provided complete protection against NDV challenge but also reduced the gross lesions on ovarian folliculi and provided 80% protection against DTMUV in ducks. We note that the aGM/prM + E vaccine can prevent challenged ducks from shedding of NDV and DTMUV. Our results suggest that the candidate vaccine aGM/prM + E would help decrease NDV and DTMUV transmissions in waterfowl raising areas in China.
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Affiliation(s)
- Minhua Sun
- Guangdong Provincial Key Laboratory of Livestock Disease Prevention; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture; Guangdong Open Laboratory of Veterinary Public Health, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Baishigang Road, Guangzhou, Guangdong, China
| | - Jiawen Dong
- Guangdong Provincial Key Laboratory of Livestock Disease Prevention; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture; Guangdong Open Laboratory of Veterinary Public Health, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Baishigang Road, Guangzhou, Guangdong, China
| | - Linlin Li
- Guangdong Provincial Key Laboratory of Livestock Disease Prevention; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture; Guangdong Open Laboratory of Veterinary Public Health, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Baishigang Road, Guangzhou, Guangdong, China
| | - Qiuyan Lin
- College of Veterinary Medicine, South China Agricultural University, 483 Wushan Road, Guangzhou, Guangdong, China
| | - Junying Sun
- Guangdong Provincial Key Laboratory of Livestock Disease Prevention; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture; Guangdong Open Laboratory of Veterinary Public Health, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Baishigang Road, Guangzhou, Guangdong, China
| | - Zhicheng Liu
- Guangdong Provincial Key Laboratory of Livestock Disease Prevention; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture; Guangdong Open Laboratory of Veterinary Public Health, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Baishigang Road, Guangzhou, Guangdong, China
| | - Haiyan Shen
- Guangdong Provincial Key Laboratory of Livestock Disease Prevention; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture; Guangdong Open Laboratory of Veterinary Public Health, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Baishigang Road, Guangzhou, Guangdong, China
| | - Jianfeng Zhang
- Guangdong Provincial Key Laboratory of Livestock Disease Prevention; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture; Guangdong Open Laboratory of Veterinary Public Health, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Baishigang Road, Guangzhou, Guangdong, China
| | - Tao Ren
- College of Veterinary Medicine, South China Agricultural University, 483 Wushan Road, Guangzhou, Guangdong, China.
| | - Chunhong Zhang
- Guangdong Provincial Key Laboratory of Livestock Disease Prevention; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture; Guangdong Open Laboratory of Veterinary Public Health, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Baishigang Road, Guangzhou, Guangdong, China.
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178
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Strand-like structures and the nonstructural proteins 5, 3 and 1 are present in the nucleus of mosquito cells infected with dengue virus. Virology 2018; 515:74-80. [DOI: 10.1016/j.virol.2017.12.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 12/13/2017] [Accepted: 12/14/2017] [Indexed: 12/18/2022]
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179
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Pinkham AM, Yu Z, Cowan JA. Attenuation of West Nile Virus NS2B/NS3 Protease by Amino Terminal Copper and Nickel Binding (ATCUN) Peptides. J Med Chem 2018; 61:980-988. [PMID: 29301071 DOI: 10.1021/acs.jmedchem.7b01409] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Andrew M. Pinkham
- Department of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Zhen Yu
- Department of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - J. A. Cowan
- Department of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
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180
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Abstract
Flaviviruses such as dengue (DENV), yellow fever (YFV), West Nile (WNV), and Zika (ZIKV) are human pathogens of global significance. In particular, DENV causes the most prevalent mosquito-borne viral diseases in humans, and ZIKV emerged from obscurity into the spotlight in 2016 as the etiologic agent of congenital Zika syndrome. Owing to the recent emergence of ZIKV as a global pandemic threat, the roles of the immune system during ZIKV infections are as yet unclear. In contrast, decades of DENV research implicate a dual role for the immune system in protection against and pathogenesis of DENV infection. As DENV and ZIKV are closely related, knowledge based on DENV studies has been used to prioritize investigation of ZIKV immunity and pathogenesis, and to accelerate ZIKV diagnostic, therapeutic, and vaccine design. This review discusses the following topics related to innate and adaptive immune responses to DENV and ZIKV: the interferon system as the key mechanism of host defense and viral target for immune evasion, antibody-mediated protection versus antibody-dependent enhancement, and T cell-mediated protection versus original T cell antigenic sin. Understanding the mechanisms that regulate the balance between immune-mediated protection and pathogenesis during DENV and ZIKV infections is critical toward development of safe and effective DENV and ZIKV therapeutics and vaccines.
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Affiliation(s)
- Annie Elong Ngono
- Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, California 92037, USA;
| | - Sujan Shresta
- Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, California 92037, USA;
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181
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Abstract
For several decades, flow cytometry has been a common approach to analyze cells and sort them to near-purity. It enables one to probe inner cellular molecules, surface receptors, or infected cells. However, the analysis of smaller entities such as viruses and exocytic vesicles has been more difficult but is becoming mainstream. This has in part been due to the development of new instrumentation with resolutions below that of conventional cytometers. It is also attributed to the several means employed to fluorescently label viruses, hence enabling them to stand out from similarly sized particles representing background noise. Thus far, more than a dozen different viruses ranging in size from 40 nm to giant viruses have been probed by this approach, which was recently dubbed "flow virometry." These studies have collectively highlighted the breadth of the applications of this method, which, for example, has elucidated the maturation of dengue virus, served as quality control for vaccinia vaccines, and enabled the sorting of herpes simplex virus discrete viral particles. The present review focuses on the means employed to characterize and sort viruses by this powerful technology and on the emerging uses of flow virometry. It similarly addresses some of its current challenges and limitations.
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182
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Swarbrick CMD, Basavannacharya C, Chan KWK, Chan SA, Singh D, Wei N, Phoo WW, Luo D, Lescar J, Vasudevan SG. NS3 helicase from dengue virus specifically recognizes viral RNA sequence to ensure optimal replication. Nucleic Acids Res 2018; 45:12904-12920. [PMID: 29165589 PMCID: PMC5728396 DOI: 10.1093/nar/gkx1127] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 11/14/2017] [Indexed: 01/06/2023] Open
Abstract
The protein–RNA interactions within the flavivirus replication complex (RC) are not fully understood. Our structure of dengue virus NS3 adenosine triphosphatase (ATPase)/helicase bound to the conserved 5′ genomic RNA 5′-AGUUGUUAGUCU-3′ reveals that D290 and R538 make specific interactions with G2 and G5 bases respectively. We show that single-stranded 12-mer RNA stimulates ATPase activity of NS3, however the presence of G2 and G5 leads to significantly higher activation. D290 is adjacent to the DEXH motif found in SF2 helicases like NS3 and interacts with R387, forming a molecular switch that activates the ATPase site upon RNA binding. Our structure guided mutagenesis revealed that disruption of D290–R387 interaction increases basal ATPase activity presumably as a result of higher conformational flexibility of the ATPase active site. Mutational studies also showed R538 plays a critical role in RNA interactions affecting translocation of viral RNA through dynamic interactions with bases at positions 4 and 5 of the ssRNA. Restriction of backbone flexibility around R538 through mutation of G540 to proline abolishes virus replication, indicating conformational flexibility around residue R538 is necessary for RNA translocation. The functionally critical sequence-specific contacts in NS3 RNA binding groove in subdomain III reveals potentially novel allosteric anti-viral drug targets.
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Affiliation(s)
- Crystall M D Swarbrick
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 8 College Road, 169857, Singapore
| | | | - Kitti W K Chan
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 8 College Road, 169857, Singapore.,Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, 117545, Singapore
| | - Shu-Ann Chan
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 8 College Road, 169857, Singapore
| | - Daljit Singh
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 8 College Road, 169857, Singapore
| | - Na Wei
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 8 College Road, 169857, Singapore
| | - Wint Wint Phoo
- Lee Kong Chian School of Medicine, Nanyang Technological University, 138673, Singapore.,Nanyang Institute for Structural Biology, School of Biological Sciences, Nanyang Technological University, 138673, Singapore
| | - Dahai Luo
- Lee Kong Chian School of Medicine, Nanyang Technological University, 138673, Singapore
| | - Julien Lescar
- Nanyang Institute for Structural Biology, School of Biological Sciences, Nanyang Technological University, 138673, Singapore
| | - Subhash G Vasudevan
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 8 College Road, 169857, Singapore.,Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, 117545, Singapore
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183
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Abstract
PURPOSE OF REVIEW The aim of this review is to report the most recent observations concerning intrauterine Zika virus (ZIKV) infection and associated neuroimaging. RECENT FINDINGS ZIKV outbreak in Brazil in 2015 was associated with an impressive registration of cases of congenital microcephaly in women with symptoms suggestive of ZIKV infection. Clinical and laboratory testing for ZIKV and hypothetic etiopathogenetic mechanisms are described. Diagnostic tests on blood, urine and amniotic fluid should be performed in all mothers with symptoms suggestive of intrauterine ZIKV infection. ZIKV causes multiple teratogenic malformations, mainly affecting the developing brain. SUMMARY Neuroimaging investigation contributes to the prenatal detection of microcephaly and other brain abnormalities in cases of intrauterine ZIKV infection. Neuroimaging is based antenatally on two-dimensional and three-dimensional ultrasound and fetal MRI, whereas computed tomography scan is performed postnatally. Although neuropathology associated with intrauterine ZIKV infection is characterized by nonspecific findings of brain disorder, reduced cortical gyration and white-matter hypomyelination or dysmyelination and cerebellar hypoplasia have been consistently observed in the majority of fetuses and newborns. Prenatal or postnatal genetic workup should be carried out to exclude cases of primary microcephaly. Follow-up should rely upon MRI and computed tomography scan as well as neuropediatrician to better define developmental outcome in survivors.
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184
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Zika virus structural biology and progress in vaccine development. Biotechnol Adv 2018; 36:47-53. [DOI: 10.1016/j.biotechadv.2017.09.004] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 09/06/2017] [Accepted: 09/08/2017] [Indexed: 01/01/2023]
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185
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Cedillo-Barrón L, García-Cordero J, Shrivastava G, Carrillo-Halfon S, León-Juárez M, Bustos Arriaga J, León Valenzuela P, Gutiérrez Castañeda B. The Role of Flaviviral Proteins in the Induction of Innate Immunity. Subcell Biochem 2018; 88:407-442. [PMID: 29900506 DOI: 10.1007/978-981-10-8456-0_17] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Flaviviruses are positive, single-stranded, enveloped cytoplasmic sense RNA viruses that cause a variety of important diseases worldwide. Among them, Zika virus, West Nile virus, Japanese encephalitis virus, and Dengue virus have the potential to cause severe disease. Extensive studies have been performed to elucidate the structure and replication strategies of flaviviruses, and current studies are aiming to unravel the complex molecular interactions between the virus and host during the very early stages of infection. The outcomes of viral infection and rapid establishment of the antiviral state, depends on viral detection by pathogen recognition receptors and rapid initiation of signalling cascades to induce an effective innate immune response. Extracellular and intracellular pathogen recognition receptors play a crucial role in detecting flavivirus infection and inducing a robust antiviral response. One of the main hallmarks of flaviviral nonstructural proteins is their multiple strategies to antagonise the interferon system. In this chapter, we summarize the molecular characteristics of flaviviral proteins and discuss how viral proteins target different components of the interferon signalling pathway by blocking phosphorylation, enhancing degradation, and downregulating the expression of major components of the Janus kinase/signal transducer and activator of transcription pathway. We also discuss how the interactions of viral proteins with host proteins facilitate viral pathogenesis. Due to the lack of antivirals or prophylactic treatments for many flaviviral infections, it is necessary to fully elucidate how these viruses disrupt cellular processes to influence pathogenesis and disease outcomes.
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Affiliation(s)
- L Cedillo-Barrón
- Departamento de Biomedicina Molecular, CINVESTAV IPN, México, D.F, Mexico.
| | - J García-Cordero
- Departamento de Biomedicina Molecular, CINVESTAV IPN, México, D.F, Mexico
| | - G Shrivastava
- Departamento de Biomedicina Molecular, CINVESTAV IPN, México, D.F, Mexico
| | - S Carrillo-Halfon
- Departamento de Biomedicina Molecular, CINVESTAV IPN, México, D.F, Mexico
| | - M León-Juárez
- Department of Immunobiochemistry, National Institute of Perinatology, México City, Mexico
| | - J Bustos Arriaga
- Unidad de Biomedicina. Facultad de Estudios Superiores-Iztacala, Universidad Nacional Autonoma de México, Edo. de México, Mexico
| | - Pc León Valenzuela
- Departamento de Biomedicina Molecular, CINVESTAV IPN, México, D.F, Mexico
| | - B Gutiérrez Castañeda
- Immunology Department UMF Facultad de Estudios Superiores-Iztacala, Universidad Nacional Autonoma de México, Edo. de México, Mexico
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186
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Jans DA, Martin AJ. Nucleocytoplasmic Trafficking of Dengue Non-structural Protein 5 as a Target for Antivirals. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1062:199-213. [DOI: 10.1007/978-981-10-8727-1_15] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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187
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Zhao Y, Zhang X, Shu S, Sun Y, Feng X, Zhang S. Yellow Fever: A Re-Emerging Threat. Health (London) 2018. [DOI: 10.4236/health.2018.1010110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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188
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Recombinant Zika NS1 Protein Secreted from Vero Cells Is Efficient for Inducing Production of Immune Serum Directed against NS1 Dimer. Int J Mol Sci 2017; 19:ijms19010038. [PMID: 29295477 PMCID: PMC5795988 DOI: 10.3390/ijms19010038] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 12/19/2017] [Accepted: 12/21/2017] [Indexed: 02/04/2023] Open
Abstract
Zika virus (ZIKV) is a mosquito-borne flavivirus that recently emerged in the South Pacific, Americas, and Caribbean islands, where the larger epidemics were documented. ZIKV infection in humans is responsible for neurological disorders and microcephaly. Flavivirus NS1 is a non-structural glycoprotein that is expressed on the cell surface and secreted as a hexameric lipoprotein particle. Intracellular NS1 exists as a dimer that is required for viral replication, whereas the secreted NS1 hexamer interacts with host factors, leading to pathophysiological conditions. In an effort to dispose of specific anti-ZIKV NS1 immune serum, Vero cells were transduced with a lentiviral vector containing the NS1 gene from an epidemic strain of ZIKV. We showed that stably transduced Vero/ZIKV NS1 cell clone was efficient in the secretion of recombinant NS1 oligomer. Immunization of adult rat with purified extracellular NS1 developed anti-ZIKV antibodies that specifically react with the NS1 dimer produced in human cells infected with African and Asian strains of ZIKV. The rat antibody against ZIKV NS1 dimer is a reliable biological tool that enables the immunological detection of secreted NS1 from host-cells infected with ZIKV.
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189
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Carossino M, Li Y, Lee PYA, Tsai CF, Chou PH, Williams D, Skillman A, Frank Cook R, Brown G, Chang HFG, Wang HTT, Balasuriya UBR. Evaluation of a field-deployable reverse transcription-insulated isothermal PCR for rapid and sensitive on-site detection of Zika virus. BMC Infect Dis 2017; 17:778. [PMID: 29258444 PMCID: PMC5735522 DOI: 10.1186/s12879-017-2852-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Accepted: 11/22/2017] [Indexed: 01/13/2023] Open
Abstract
Background The recent emergence of Zika virus (ZIKV) in Brazil and its precipitous expansion throughout the Americas has highlighted the urgent need for a rapid and reliable on-site diagnostic assay suitable for viral detection. Such point-of-need (PON), low-cost diagnostics are essential for ZIKV control in vulnerable areas with limited resources. Methods We developed and evaluated a ZIKV-specific field-deployable RT-iiPCR reagent set targeting the E gene for rapid detection of ZIKV in ZIKV-spiked human and mosquito specimens, and compared its performance to the Center for Disease Control and Prevention (CDC) and Pan American Health Organization (PAHO) RT-qPCR assays targeting the E and NS2B genes, respectively. Results These assays demonstrated exclusive specificity for ZIKV (African and Asian lineages), had limits of detection ranging from 10 to 100 in vitro transcribed RNA copies/μl and detection endpoints at 10 plaque forming units/ml of infectious tissue culture fluid. Analysis of human whole blood, plasma, serum, semen, urine, and mosquito pool samples spiked with ZIKV showed an agreement of 90% (k = 0.80), 92% (k = 0.82), 95% (k = 0.86), 92% (k = 0.81), 90% (k = 0.79), and 100% (k = 1), respectively, between the RT-iiPCR assay and composite results from the reference RT-qPCR assays. Overall, the concurrence between the ZIKV RT-iiPCR and the reference RT-qPCR assays was 92% (k = 0.83). Conclusions The ZIKV RT-iiPCR has a performance comparable to the reference CDC and PAHO RT-qPCR assays but provides much faster results (~1.5 h) with a field-deployable system that can be utilized as a PON diagnostic with the potential to significantly improve the quality of the health care system in vulnerable areas. Electronic supplementary material The online version of this article (10.1186/s12879-017-2852-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Mariano Carossino
- Maxwell H. Gluck Equine Research Center, Department of Veterinary Science, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, USA
| | - Yanqiu Li
- Maxwell H. Gluck Equine Research Center, Department of Veterinary Science, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, USA
| | | | | | | | - Dennis Williams
- University of Kentucky Medical Center, Chandler Hospital, Kentucky Blood Center, University of Kentucky, Lexington, KY, USA
| | - Ashley Skillman
- Maxwell H. Gluck Equine Research Center, Department of Veterinary Science, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, USA
| | - R Frank Cook
- Maxwell H. Gluck Equine Research Center, Department of Veterinary Science, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, USA
| | - Grayson Brown
- Department of Entomology, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, USA
| | | | | | - Udeni B R Balasuriya
- Maxwell H. Gluck Equine Research Center, Department of Veterinary Science, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, USA.
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190
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Viperin Targets Flavivirus Virulence by Inducing Assembly of Noninfectious Capsid Particles. J Virol 2017; 92:JVI.01751-17. [PMID: 29046456 PMCID: PMC5730767 DOI: 10.1128/jvi.01751-17] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 10/12/2017] [Indexed: 12/20/2022] Open
Abstract
Efficient antiviral immunity requires interference with virus replication at multiple layers targeting diverse steps in the viral life cycle. We describe here a novel flavivirus inhibition mechanism that results in interferon-mediated obstruction of tick-borne encephalitis virus particle assembly and involves release of malfunctioning membrane-associated capsid (C) particles. This mechanism is controlled by the activity of the interferon-induced protein viperin, a broad-spectrum antiviral interferon-stimulated gene. Through analysis of the viperin-interactome, we identified the Golgi brefeldin A-resistant guanine nucleotide exchange factor 1 (GBF1) as the cellular protein targeted by viperin. Viperin-induced antiviral activity, as well as C-particle release, was stimulated by GBF1 inhibition and knockdown and reduced by elevated levels of GBF1. Our results suggest that viperin targets flavivirus virulence by inducing the secretion of unproductive noninfectious virus particles via a GBF1-dependent mechanism. This as-yet-undescribed antiviral mechanism allows potential therapeutic intervention. IMPORTANCE The interferon response can target viral infection on almost every level; however, very little is known about the interference of flavivirus assembly. We show here that interferon, through the action of viperin, can disturb the assembly of tick-borne encephalitis virus. The viperin protein is highly induced after viral infection and exhibit broad-spectrum antiviral activity. However, the mechanism of action is still elusive and appears to vary between the different viruses, indicating that cellular targets utilized by several viruses might be involved. In this study, we show that viperin induces capsid particle release by interacting and inhibiting the function of the cellular protein Golgi brefeldin A-resistant guanine nucleotide exchange factor 1 (GBF1). GBF1 is a key protein in the cellular secretory pathway and is essential in the life cycle of many viruses, also targeted by viperin, implicating GBF1 as a novel putative drug target.
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191
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New Targets for Zika Virus Determined by Human-Viral Interactomic: A Bioinformatics Approach. BIOMED RESEARCH INTERNATIONAL 2017; 2017:1734151. [PMID: 29379794 PMCID: PMC5742907 DOI: 10.1155/2017/1734151] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 10/06/2017] [Accepted: 10/11/2017] [Indexed: 02/08/2023]
Abstract
Identifying ZIKV factors interfering with human host pathways represents a major challenge in understanding ZIKV tropism and pathogenesis. The integration of proteomic, gene expression and Protein-Protein Interactions (PPIs) established between ZIKV and human host proteins predicted by the OralInt algorithm identified 1898 interactions with medium or high score (≥0.7). Targets implicated in vesicular traffic and docking were identified. New receptors involved in endocytosis pathways as ZIKV entry targets, using both clathrin-dependent (17 receptors) and independent (10 receptors) pathways, are described. New targets used by the ZIKV to undermine the host's antiviral immune response are proposed based on predicted interactions established between the virus and host cell receptors and/or proteins with an effector or signaling role in the immune response such as IFN receptors and TLR. Complement and cytokines are proposed as extracellular potential interacting partners of the secreted form of NS1 ZIKV protein. Altogether, in this article, 18 new human targets for structural and nonstructural ZIKV proteins are proposed. These results are of great relevance for the understanding of viral pathogenesis and consequently the development of preventive (vaccines) and therapeutic targets for ZIKV infection management.
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192
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Bollweg BC, Silva-Flannery L, Spivey P, Hale GL. Optimization of commercially available Zika virus antibodies for use in a laboratory-developed immunohistochemical assay. JOURNAL OF PATHOLOGY CLINICAL RESEARCH 2017; 4:19-25. [PMID: 29416874 PMCID: PMC5783976 DOI: 10.1002/cjp2.84] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 09/26/2017] [Accepted: 10/02/2017] [Indexed: 12/22/2022]
Abstract
Zika virus (ZIKV) infection during pregnancy can cause adverse fetal outcomes and severe irreversible congenital birth defects including microcephaly. Immunohistochemistry (IHC) is a valuable diagnostic tool for detecting ZIKV antigens in tissues from cases of fetal loss in women infected with ZIKV, and for providing insights into disease pathogenesis. As a result, there is increasing demand for commercially available ZIKV antibodies for use in IHC assays. ZIKV antibodies were selected and obtained from commercial sources to include both mouse and rabbit hosts, and a variety of antigenic targets. Pretreatment conditions and antibody concentrations resulting in optimal immunohistochemical staining were determined using ZIKV cell control and polymerase chain reaction (PCR)‐confirmed ZIKV case control material (fetal brain tissue). Cross‐reactivity of the antibodies against other flaviviruses (dengue virus serogroups 1–4, yellow fever virus, Japanese encephalitis virus, West Nile virus) and chikungunya virus was also evaluated. Immunostaining using the commercially available antibodies was compared to a previously validated ZIKV IHC assay used for primary diagnosis. Four antibodies demonstrated optimal staining similar to the previously validated ZIKV IHC assay. Two of the four antibodies cross‐reacted with dengue virus, while the other two antibodies showed no cross‐reactivity with dengue, other flaviviruses, or chikungunya virus. Differences in the cross‐reactivity profiles could not be entirely explained by the antigenic target. Commercially available ZIKV antibodies can be optimized for use in IHC testing to aid in ZIKV diagnostic testing and an evaluation of tissue tropism.
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Affiliation(s)
- Brigid C Bollweg
- Infectious Diseases Pathology BranchCenters for Disease Control and PreventionAtlantaGAUSA
| | - Luciana Silva-Flannery
- Infectious Diseases Pathology BranchCenters for Disease Control and PreventionAtlantaGAUSA
| | - Pamela Spivey
- Infectious Diseases Pathology BranchCenters for Disease Control and PreventionAtlantaGAUSA
| | - Gillian L Hale
- Infectious Diseases Pathology BranchCenters for Disease Control and PreventionAtlantaGAUSA
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193
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Hsieh MS, Chen MY, Hsieh CH, Pan CH, Yu GY, Chen HW. Detection and quantification of dengue virus using a novel biosensor system based on dengue NS3 protease activity. PLoS One 2017; 12:e0188170. [PMID: 29161301 PMCID: PMC5697845 DOI: 10.1371/journal.pone.0188170] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 11/01/2017] [Indexed: 01/08/2023] Open
Abstract
Background The traditional methods, plaque assays and immuno-focus assays, used to titrate infectious dengue virus (DENV) particles are time consuming and labor intensive. Here, we developed a DENV protease activity detection system (DENPADS) to visualize DENV infection in cells based on dengue protease activity. Methodology/Principal findings Dengue NS3 protease cleaves NS4B-NS5. BHK-21 cells stably expressing the sensor module comprising DENV-2 NS4 and the 10 amino-terminal amino acids of NS5 (N10NS5) fused with the SV40 nuclear localization signal (NLS) and Cre recombinase (Cre), were generated. Cre is constrained outside the nucleus in the absence of NS3 activity but translocates into the nucleus through NS4B-NS5 cleavage when cells are infected with DENV. Nuclear translocation of Cre can trigger the reporter system, which contains a cis-loxP-flanked mCherry with three continuous stop codons following an SV40 polyA tail cDNA upstream of EGFP or mHRP cDNA. Our results show that DENPADS is an efficient and accurate method to titrate 4 DENV serotypes in 24 hours. Compared with current virus titration methods, the entire process is easy to perform, and the data are easily acquired. Conclusions/Significance In this study, we demonstrate that DENPADS can be used to detect dengue viral infection through a fluorescence switch or HRP activity in the infected cells. This approach is sensitive with less incubation time and labor input. In addition, DENPADS can simultaneously evaluate the efficacy and cytotoxicity of potential anti-DENV candidates. Overall, DENPADS is a useful tool for dengue research.
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Affiliation(s)
- Ming-Shu Hsieh
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan, ROC
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, Taiwan, ROC
| | - Mei-Yu Chen
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, Taiwan, ROC
| | - Chun-Hsiang Hsieh
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, Taiwan, ROC
| | - Chien-Hsiung Pan
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, Taiwan, ROC
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan, ROC
| | - Guann-Yi Yu
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, Taiwan, ROC
| | - Hsin-Wei Chen
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan, ROC
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, Taiwan, ROC
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan, ROC
- * E-mail:
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194
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Javed F, Manzoor KN, Ali M, Haq IU, Khan AA, Zaib A, Manzoor S. Zika virus: what we need to know? J Basic Microbiol 2017; 58:3-16. [DOI: 10.1002/jobm.201700398] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 09/19/2017] [Accepted: 09/03/2017] [Indexed: 01/22/2023]
Affiliation(s)
- Farakh Javed
- Department of Microbiology; University of Haripur; Haripur Pakistan
| | | | - Mubashar Ali
- Department of Microbiology; University of Haripur; Haripur Pakistan
| | - Irshad U. Haq
- Department of Microbiology; University of Haripur; Haripur Pakistan
| | - Abid A. Khan
- Department of Biosciences; COMSATS Institute of Information Technology; Islamabad Pakistan
| | - Assad Zaib
- Department of Medical Lab Technology; University of Haripur; Haripur Pakistan
| | - Sobia Manzoor
- Atta-ur-Rehman School of Applied Bio-Sciences; National University of Science and Technology; Islamabad Pakistan
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195
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Bordi L, Avsic-Zupanc T, Lalle E, Vairo F, Capobianchi MR, da Costa Vasconcelos PF. Emerging Zika Virus Infection: A Rapidly Evolving Situation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 972:61-86. [PMID: 28032327 DOI: 10.1007/5584_2016_187] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Zika virus is a mosquito-borne flavivirus, firstly identified in Uganda and responsible for sporadic human cases in Africa and Asia until recently, when large outbreak occurred in Pacific Ocean and the Americas. Since the main vectors during its spread outside of Africa have been Ae. albopictus and Ae. aegypti mosquitoes, which are widely distributed all over the world, there is urgent need for a coordinated response for prevention and spread of ZIKV epidemics.Despite clinical manifestation of Zika virus infection are usually mild and self limiting, there are reports suggesting, during the recent epidemic, an association of ZIKV infection with severe consequences, including fetal/newborn microcephaly, due to vertical in utero transmission, autoimmune-neurological presentations including cranial nerve dysfunction, and Guillain-Barré Syndrome in adults. The primary mode of transmission of Zika virus between humans is through the bite of an infected female mosquito of the Aedes genus, but also sexual and blood transfusion transmission may occur. Moreover, a case of non-sexual spread from one person to another has been described, indicating that we still have more to learn about Zika transmission.Biological basis for pathogenetic effects are under investigation. Laboratory diagnosis is challenging since, so far, there are no "gold standard" diagnostic tools, and the low and short viremia in the acute phase, and together with the high cross-reactivity among the members of flavivirus genus are the most challenging aspects to be overcome.
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Affiliation(s)
- Licia Bordi
- Laboratory of virology, National Institute for Infectious Diseases "Lazzaro Spallanzani", IRCCS, Via Portuense 292, 00149, Rome, Italy
| | - Tatjana Avsic-Zupanc
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Eleonora Lalle
- Laboratory of virology, National Institute for Infectious Diseases "Lazzaro Spallanzani", IRCCS, Via Portuense 292, 00149, Rome, Italy
| | - Francesco Vairo
- Emerging and Reemerging Infectious Disease Unit, National Institute for Infectious Diseases "Lazzaro Spallanzani", IRCCS, Rome, Italy
| | - Maria Rosaria Capobianchi
- Laboratory of virology, National Institute for Infectious Diseases "Lazzaro Spallanzani", IRCCS, Via Portuense 292, 00149, Rome, Italy.
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196
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Halim SA, Khan S, Khan A, Wadood A, Mabood F, Hussain J, Al-Harrasi A. Targeting Dengue Virus NS-3 Helicase by Ligand based Pharmacophore Modeling and Structure based Virtual Screening. Front Chem 2017; 5:88. [PMID: 29164104 PMCID: PMC5671650 DOI: 10.3389/fchem.2017.00088] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 10/16/2017] [Indexed: 12/25/2022] Open
Abstract
Dengue fever is an emerging public health concern, with several million viral infections occur annually, for which no effective therapy currently exist. Non-structural protein 3 (NS-3) Helicase encoded by the dengue virus (DENV) is considered as a potential drug target to design new and effective drugs against dengue. Helicase is involved in unwinding of dengue RNA. This study was conducted to design new NS-3 Helicase inhibitor by in silico ligand- and structure based approaches. Initially ligand-based pharmacophore model was generated that was used to screen a set of 1201474 compounds collected from ZINC Database. The compounds matched with the pharmacophore model were docked into the active site of NS-3 helicase. Based on docking scores and binding interactions, 25 compounds are suggested to be potential inhibitors of NS3 Helicase. The pharmacokinetic properties of these hits were predicted. The selected hits revealed acceptable ADMET properties. This study identified potential inhibitors of NS-3 Helicase in silico, and can be helpful in the treatment of Dengue.
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Affiliation(s)
- Sobia A Halim
- Department of Biochemistry, Kinnaird College for Women, Lahore, Pakistan
| | - Shanza Khan
- Department of Biochemistry, Kinnaird College for Women, Lahore, Pakistan
| | - Ajmal Khan
- Department of Chemistry, COMSATS Institute of Information Technology, Abbottabad, Pakistan.,UoN Chair of Oman Medicinal Plants and Marine Products, University of Nizwa, Nizwa, Oman
| | - Abdul Wadood
- Department of Biochemistry, Shankar Campus, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Fazal Mabood
- Department of Biological Sciences and Chemistry, College of Arts and Sciences, University of Nizwa, Nizwa, Oman
| | - Javid Hussain
- Department of Biological Sciences and Chemistry, College of Arts and Sciences, University of Nizwa, Nizwa, Oman
| | - Ahmed Al-Harrasi
- UoN Chair of Oman Medicinal Plants and Marine Products, University of Nizwa, Nizwa, Oman
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197
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New insights into flavivirus biology: the influence of pH over interactions between prM and E proteins. J Comput Aided Mol Des 2017; 31:1009-1019. [DOI: 10.1007/s10822-017-0076-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 10/09/2017] [Indexed: 10/18/2022]
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198
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Duran A, Valero N, Mosquera J, Fuenmayor E, Alvarez-Mon M. Gefitinib and pyrrolidine dithiocarbamate decrease viral replication and cytokine production in dengue virus infected human monocyte cultures. Life Sci 2017; 191:180-185. [PMID: 29055802 DOI: 10.1016/j.lfs.2017.10.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 10/07/2017] [Accepted: 10/17/2017] [Indexed: 02/06/2023]
Abstract
AIMS The epidermal growth factor receptor (EGFR) and nucleotide-binding and oligomerization-domain containing 2 (NOD2) are important in cancer and in microbial recognition, respectively. These molecules trigger intracellular signaling pathways inducing the expression of inflammatory genes by NF-kB translocation. Gefitinib (GBTC) and pyrrolidine dithiocarbamate (PDTC) are capable of inhibiting EGFR/NOD2 and NF-kB, respectively. In earlier stages of dengue virus (DENV) infection, monocytes are capable of sustaining viral replication and increasing cytokine production, suggesting that monocyte/macrophages play an important role in early DENV replication. GBTC and PDTC have not been used to modify the pathogenesis of DENV in infected cells. This study was aimed to determine the effect of GBTC and PDTC on viral replication and cytokine production in DENV serotype 2 (DENV2)-infected human monocyte cultures. MAIN METHODS GBTC and PDTC were used to inhibit EGFR/NOD2 and NF-kB, respectively. Cytokine production was measured by ELISA and viral replication by plaque forming unit assay. KEY FINDINGS Increased DENV2 replication and anti-viral cytokine production (IFN-α/β, TNF-α, IL-12 and IL-18) in infected cultures were found. These parameters were decreased after EGFR/NOD2 or NF-kB inhibitions. SIGNIFICANCE The inhibitory effects of GBTC and PDTC on viral replication and cytokine production can be beneficial in the treatment of patients infected by dengue and suggest a possible role of EGFR/NOD2 receptors and NF-kB in dengue pathogenesis.
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Affiliation(s)
- Anyelo Duran
- Instituto de Investigaciones Clínicas "Dr. Américo Negrette", Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela; Cátedra de Bioquímica General, Escuela de Bioanálisis, Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela; Sociedad Venezolana de Microbiología, Venezuela
| | - Nereida Valero
- Instituto de Investigaciones Clínicas "Dr. Américo Negrette", Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela; Sociedad Venezolana de Microbiología, Venezuela
| | - Jesús Mosquera
- Instituto de Investigaciones Clínicas "Dr. Américo Negrette", Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela.
| | - Edgard Fuenmayor
- Instituto de Investigaciones Clínicas "Dr. Américo Negrette", Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela
| | - Melchor Alvarez-Mon
- Servicio de Enfermedades del Sistema Inmune y Oncología, Hospital Universitario "Príncipe de Asturias", Universidad de Alcalá, Madrid, Spain
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Chew MF, Poh KS, Poh CL. Peptides as Therapeutic Agents for Dengue Virus. Int J Med Sci 2017; 14:1342-1359. [PMID: 29200948 PMCID: PMC5707751 DOI: 10.7150/ijms.21875] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 09/01/2017] [Indexed: 12/19/2022] Open
Abstract
Dengue is an important global threat caused by dengue virus (DENV) that records an estimated 390 million infections annually. Despite the availability of CYD-TDV as a commercial vaccine, its long-term efficacy against all four dengue virus serotypes remains unsatisfactory. There is therefore an urgent need for the development of antiviral drugs for the treatment of dengue. Peptide was once a neglected choice of medical treatment but it has lately regained interest from the pharmaceutical industry following pioneering advancements in technology. In this review, the design of peptide drugs, antiviral activities and mechanisms of peptides and peptidomimetics (modified peptides) action against dengue virus are discussed. The development of peptides as inhibitors for viral entry, replication and translation is also described, with a focus on the three main targets, namely, the host cell receptors, viral structural proteins and viral non-structural proteins. The antiviral peptides designed based on these approaches may lead to the discovery of novel anti-DENV therapeutics that can treat dengue patients.
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Affiliation(s)
- Miaw-Fang Chew
- Research Centre for Biomedical Sciences, Sunway University, Bandar Sunway, Selangor 47500, Malaysia
| | - Keat-Seong Poh
- Department of Surgery, Faculty of Medicine, University of Malaya, Jalan Universiti, Kuala Lumpur, 50603, Malaysia
| | - Chit-Laa Poh
- Research Centre for Biomedical Sciences, Sunway University, Bandar Sunway, Selangor 47500, Malaysia
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Asif A, Manzoor S, Tuz-Zahra F, Saalim M, Ashraf M, Ishtiyaq J, Khalid M. Zika Virus: Immune Evasion Mechanisms, Currently Available Therapeutic Regimens, and Vaccines. Viral Immunol 2017; 30:682-690. [PMID: 29028178 DOI: 10.1089/vim.2017.0046] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The sudden emergence of infectious pathogens such as Zika virus (ZIKV) holds global health concerns. Recent dissemination of ZIKV from Pacific to Americas with an upsurge of congenital anomalies and Guillain Barre Syndrome (GBS) in adults has created an alarming situation. High-throughput studies are in progress to understand ZIKV's mode of pathogenesis and mechanism of immune escape, yet the pathogenesis remains obscure. Mainly ZIKV's envelope (E) protein and nonstructural proteins (mainly NS1 and NS5) manipulate host cell to support viral immune escape by modulation of the interferon pathway and complement antagonism. The development of direct therapeutics for ZIKV infection is required to overcome the rapidly evolving viral threat. Currently, the existing strategies for ZIKV treatment are only supportive. Although, there is no prophylactic or therapeutic vaccine presently available, however, recent efforts have brought up ZIKV vaccines into clinical trial phase 1. This review presents the highlights of recent advances in understanding immune evasion strategies adapted by ZIKV and existing therapies against the virus.
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Affiliation(s)
- Arun Asif
- Atta-ur-Rahman School of Applied Bio-Sciences, National University of Sciences and Technology , Islamabad, Pakistan
| | - Sobia Manzoor
- Atta-ur-Rahman School of Applied Bio-Sciences, National University of Sciences and Technology , Islamabad, Pakistan
| | - Fatima Tuz-Zahra
- Atta-ur-Rahman School of Applied Bio-Sciences, National University of Sciences and Technology , Islamabad, Pakistan
| | - Muhammad Saalim
- Atta-ur-Rahman School of Applied Bio-Sciences, National University of Sciences and Technology , Islamabad, Pakistan
| | - Maliha Ashraf
- Atta-ur-Rahman School of Applied Bio-Sciences, National University of Sciences and Technology , Islamabad, Pakistan
| | - Javeria Ishtiyaq
- Atta-ur-Rahman School of Applied Bio-Sciences, National University of Sciences and Technology , Islamabad, Pakistan
| | - Madiha Khalid
- Atta-ur-Rahman School of Applied Bio-Sciences, National University of Sciences and Technology , Islamabad, Pakistan
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