51
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Phanich J, Rungrotmongkol T, Kungwan N, Hannongbua S. Role of R292K mutation in influenza H7N9 neuraminidase toward oseltamivir susceptibility: MD and MM/PB(GB)SA study. J Comput Aided Mol Des 2016; 30:917-926. [PMID: 27714494 DOI: 10.1007/s10822-016-9981-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 09/27/2016] [Indexed: 12/12/2022]
Abstract
The H7N9 avian influenza virus is a novel re-assortment from at least four different strains of virus. Neuraminidase, which is a glycoprotein on the surface membrane, has been the target for drug treatment. However, some H7N9 strains that have been isolated from patient after drug treatment have a R292K mutation in neuraminidase. This substitution was found to facilitate drug resistance using protein- and virus- assays, in particular it gave a high resistance to the most commonly used drug, oseltamivir. The aim of this research is to understand the source of oseltamivir resistance using MD simulations and the MM/PB(GB)SA binding free energy approaches. Both methods can predict the reduced susceptibility of oseltamivir in good agreement to the IC 50 binding energy, although MM/GBSA underestimates this prediction compared to the MM/PBSA calculation. Electrostatic interaction is the main contribution for oseltamivir binding in terms of both interaction and solvation. We found that the source of the drug resistance is a decrease in the binding interaction combined with the reduction of the dehydration penalty. The smaller K292 mutated residue has a larger binding pocket cavity compared to the wild-type resulting in the loss of drug carboxylate-K292 hydrogen bonding and an increased accessibility for water molecules around the K292 mutated residue. In addition, oseltamivir does not bind well to the R292K mutant complex as shown by the high degree of fluctuation in ligand RMSD during the simulation and the change in angular distribution of bulky side chain groups.
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Affiliation(s)
- Jiraphorn Phanich
- Computational Chemistry Unit Cell, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Thanyada Rungrotmongkol
- Structural and Computational Biology Research Group, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
- Ph.D. Program in Bioinformatics and Computational Biology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
| | - Nawee Kungwan
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Supot Hannongbua
- Computational Chemistry Unit Cell, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
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52
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Wilson JR, Guo Z, Reber A, Kamal RP, Music N, Gansebom S, Bai Y, Levine M, Carney P, Tzeng WP, Stevens J, York IA. An influenza A virus (H7N9) anti-neuraminidase monoclonal antibody with prophylactic and therapeutic activity in vivo. Antiviral Res 2016; 135:48-55. [PMID: 27713074 DOI: 10.1016/j.antiviral.2016.10.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 09/16/2016] [Accepted: 10/03/2016] [Indexed: 12/09/2022]
Abstract
Zoonotic A(H7N9) avian influenza viruses emerged in China in 2013 and continue to be a threat to human public health, having infected over 800 individuals with a mortality rate approaching 40%. Treatment options for people infected with A(H7N9) include the use of neuraminidase (NA) inhibitors. However, like other influenza viruses, A(H7N9) can become resistant to these drugs. The use of monoclonal antibodies is a rapidly developing strategy for controlling influenza virus infection. Here we generated a murine monoclonal antibody (3c10-3) directed against the NA of A(H7N9) and show that prophylactic systemic administration of 3c10-3 fully protected mice from lethal challenge with wild-type A/Anhui/1/2013 (H7N9). Further, post-infection treatment with a single systemic dose of 3c10-3 at either 24, 48 or 72 h post A(H7N9) challenge resulted in both dose- and time-dependent protection of up to 100% of mice, demonstrating therapeutic potential for 3c10-3. Epitope mapping revealed that 3c10-3 binds near the enzyme active site of NA, and functional characterization showed that 3c10-3 inhibits the enzyme activity of NA and restricts the cell-to-cell spread of the virus in cultured cells. Affinity analysis also revealed that 3c10-3 binds equally well to recombinant NA of wild-type A/Anhui/1/2013 and to a variant NA carrying a R289K mutation known to infer NAI resistance. These results suggest that 3c10-3 has the potential to be used as a therapeutic to treat A(H7N9) infections either as an alternative to, or in combination with, current NA antiviral inhibitors.
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Affiliation(s)
- Jason R Wilson
- Influenza Division, National Center for Immunization and Respiratory Disease, Centers for Disease Control and Prevention, Atlanta, GA, USA; Carter Consulting, Inc., Atlanta, GA, USA
| | - Zhu Guo
- Influenza Division, National Center for Immunization and Respiratory Disease, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Adrian Reber
- Influenza Division, National Center for Immunization and Respiratory Disease, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Ram P Kamal
- Influenza Division, National Center for Immunization and Respiratory Disease, Centers for Disease Control and Prevention, Atlanta, GA, USA; Battelle Memorial Institute, Atlanta, GA, USA
| | - Nedzad Music
- Influenza Division, National Center for Immunization and Respiratory Disease, Centers for Disease Control and Prevention, Atlanta, GA, USA; Battelle Memorial Institute, Atlanta, GA, USA
| | - Shane Gansebom
- Influenza Division, National Center for Immunization and Respiratory Disease, Centers for Disease Control and Prevention, Atlanta, GA, USA; Carter Consulting, Inc., Atlanta, GA, USA
| | - Yaohui Bai
- Influenza Division, National Center for Immunization and Respiratory Disease, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Min Levine
- Influenza Division, National Center for Immunization and Respiratory Disease, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Paul Carney
- Influenza Division, National Center for Immunization and Respiratory Disease, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Wen-Pin Tzeng
- Influenza Division, National Center for Immunization and Respiratory Disease, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - James Stevens
- Influenza Division, National Center for Immunization and Respiratory Disease, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Ian A York
- Influenza Division, National Center for Immunization and Respiratory Disease, Centers for Disease Control and Prevention, Atlanta, GA, USA.
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53
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Bi Y, Wong G, Liu Y, Liu L, Gao GF, Shi Y. Ribavirin is effective against drug-resistant H7N9 influenza virus infections. Protein Cell 2016; 7:611-4. [PMID: 27430950 PMCID: PMC4980329 DOI: 10.1007/s13238-016-0287-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Affiliation(s)
- Yuhai Bi
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
- Shenzhen Key Laboratory of Pathogen and Immunity, State Key Discipline of Infectious Disease, Shenzhen Third People's Hospital, Shenzhen, 518112, China.
- Center for Influenza Research and Early-warning (CASCIRE), Chinese Academy of Sciences, Beijing, 100101, China.
| | - Gary Wong
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yingxia Liu
- Shenzhen Key Laboratory of Pathogen and Immunity, State Key Discipline of Infectious Disease, Shenzhen Third People's Hospital, Shenzhen, 518112, China
| | - Lei Liu
- Shenzhen Key Laboratory of Pathogen and Immunity, State Key Discipline of Infectious Disease, Shenzhen Third People's Hospital, Shenzhen, 518112, China
| | - George F Gao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- Shenzhen Key Laboratory of Pathogen and Immunity, State Key Discipline of Infectious Disease, Shenzhen Third People's Hospital, Shenzhen, 518112, China
- Center for Influenza Research and Early-warning (CASCIRE), Chinese Academy of Sciences, Beijing, 100101, China
- Research Network of Immunity and Health (RNIH), Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing, 100101, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, Zhejiang University, Hangzhou, 310003, China
| | - Yi Shi
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
- Shenzhen Key Laboratory of Pathogen and Immunity, State Key Discipline of Infectious Disease, Shenzhen Third People's Hospital, Shenzhen, 518112, China.
- Center for Influenza Research and Early-warning (CASCIRE), Chinese Academy of Sciences, Beijing, 100101, China.
- Research Network of Immunity and Health (RNIH), Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing, 100101, China.
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54
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Pains and Gains from China's Experiences with Emerging Epidemics: From SARS to H7N9. BIOMED RESEARCH INTERNATIONAL 2016; 2016:5717108. [PMID: 27525272 PMCID: PMC4971293 DOI: 10.1155/2016/5717108] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 06/23/2016] [Indexed: 01/28/2023]
Abstract
Over the recent decades, China experienced several emerging virus outbreaks including those caused by the severe acute respiratory syndrome- (SARS-) coronavirus (Cov), H5N1 virus, and H7N9 virus. The SARS tragedy revealed faults in China's infectious disease prevention system, propelling the Chinese government to enact reforms that enabled better combating of the subsequent H1N1 and H7N9 avian flu epidemics. The system is buttressed by three fundamental, mutually reinforcing components: (1) enduring government administration reforms, including legislation establishing a unified public health emergency management system; (2) prioritized funding for biotechnology and biomedicine industrialization, especially in the areas of pathogen identification, drug production, and the development of vaccines and diagnostics; and (3) increasing investment for public health and establishment of a rapid-response infectious diseases prevention and control system. China is now using its hard-gained experience to support the fight against Ebola in Africa and the Middle East Respiratory Syndrome in its own country.
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55
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Gaymard A, Charles-Dufant A, Sabatier M, Cortay JC, Frobert E, Picard C, Casalegno JS, Rosa-Calatrava M, Ferraris O, Valette M, Ottmann M, Lina B, Escuret V. Impact on antiviral resistance of E119V, I222L and R292K substitutions in influenza A viruses bearing a group 2 neuraminidase (N2, N3, N6, N7 and N9). J Antimicrob Chemother 2016; 71:3036-3045. [PMID: 27432605 DOI: 10.1093/jac/dkw275] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 06/01/2016] [Accepted: 06/02/2016] [Indexed: 01/02/2023] Open
Abstract
OBJECTIVES While subtype-specific substitutions linked to neuraminidase (NA) inhibitor resistance are well described in human N1 and N2 influenza NAs, little is known about other NA subtypes. The aim of this study was to determine whether the R292K and E119V ± I222L substitutions could be associated with oseltamivir resistance in all group 2 NAs and had an impact on virus fitness. METHODS Reassortant viruses with WT NA or variant N2, N3, N6, N7 or N9 NAs, bearing R292K or E119V ± I222L substitutions, were produced by reverse genetics. The antiviral susceptibility, activity, Km of the NA, mutation stability and in vitro virus fitness in MDCK cells were determined. RESULTS NA activities could be ranked as follows regardless of the substitution: N3 ≥ N6 > N2 ≥ N9 > N7. Using NA inhibitor resistance interpretation criteria used for human N1 or N2, the NA-R292K substitution conferred highly reduced inhibition by oseltamivir and the N6- or N9-R292K substitution conferred reduced inhibition by zanamivir and laninamivir. Viruses with the N3- or N6-E119V substitution showed normal inhibition by oseltamivir, while those with the N2-, N7- or N9-E119V substitution showed reduced inhibition by oseltamivir. Viruses with NA-E119V + I222L substitutions showed reduced inhibition (N3 and N6) or highly reduced inhibition (N2, N7 and N9) by oseltamivir. Viruses bearing the NA-R292K substitution had lower affinity and viruses bearing the NA-E119V substitution had higher affinity for the MUNANA substrate than viruses with corresponding WT NA. CONCLUSIONS NA-R292K and E119V + I222L substitutions conferred reduced inhibition by oseltamivir for all group 2 NAs. Surveillance of NA inhibitor resistance for zoonotic and human influenza viruses and the development of novel antiviral agents with different targets should be continued.
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Affiliation(s)
- Alexandre Gaymard
- Univ Lyon, Université Lyon 1, Faculté de Médecine Lyon Est, CIRI Inserm U1111, équipe Virpath, F-69008, Lyon, France.,Hospices Civils de Lyon, Centre National de Référence virus influenzae France Sud, Laboratoire de Virologie, Groupement Hospitalier Nord, F-69317, Lyon cedex 04, France
| | - Aymeric Charles-Dufant
- Univ Lyon, Université Lyon 1, Faculté de Médecine Lyon Est, CIRI Inserm U1111, équipe Virpath, F-69008, Lyon, France
| | - Murielle Sabatier
- Univ Lyon, Université Lyon 1, Faculté de Médecine Lyon Est, CIRI Inserm U1111, équipe Virpath, F-69008, Lyon, France
| | - Jean-Claude Cortay
- Univ Lyon, Université Lyon 1, Faculté de Médecine Lyon Est, CIRI Inserm U1111, équipe Virpath, F-69008, Lyon, France
| | - Emilie Frobert
- Univ Lyon, Université Lyon 1, Faculté de Médecine Lyon Est, CIRI Inserm U1111, équipe Virpath, F-69008, Lyon, France.,Hospices Civils de Lyon, Centre National de Référence virus influenzae France Sud, Laboratoire de Virologie, Groupement Hospitalier Nord, F-69317, Lyon cedex 04, France
| | - Caroline Picard
- Univ Lyon, Université Lyon 1, Faculté de Médecine Lyon Est, CIRI Inserm U1111, équipe Virpath, F-69008, Lyon, France
| | - Jean-Sébastien Casalegno
- Univ Lyon, Université Lyon 1, Faculté de Médecine Lyon Est, CIRI Inserm U1111, équipe Virpath, F-69008, Lyon, France.,Hospices Civils de Lyon, Centre National de Référence virus influenzae France Sud, Laboratoire de Virologie, Groupement Hospitalier Nord, F-69317, Lyon cedex 04, France
| | - Manuel Rosa-Calatrava
- Univ Lyon, Université Lyon 1, Faculté de Médecine Lyon Est, CIRI Inserm U1111, équipe Virpath, F-69008, Lyon, France
| | - Olivier Ferraris
- Univ Lyon, Université Lyon 1, Faculté de Médecine Lyon Est, CIRI Inserm U1111, équipe Virpath, F-69008, Lyon, France
| | - Martine Valette
- Univ Lyon, Université Lyon 1, Faculté de Médecine Lyon Est, CIRI Inserm U1111, équipe Virpath, F-69008, Lyon, France.,Hospices Civils de Lyon, Centre National de Référence virus influenzae France Sud, Laboratoire de Virologie, Groupement Hospitalier Nord, F-69317, Lyon cedex 04, France
| | - Michèle Ottmann
- Univ Lyon, Université Lyon 1, Faculté de Médecine Lyon Est, CIRI Inserm U1111, équipe Virpath, F-69008, Lyon, France
| | - Bruno Lina
- Univ Lyon, Université Lyon 1, Faculté de Médecine Lyon Est, CIRI Inserm U1111, équipe Virpath, F-69008, Lyon, France.,Hospices Civils de Lyon, Centre National de Référence virus influenzae France Sud, Laboratoire de Virologie, Groupement Hospitalier Nord, F-69317, Lyon cedex 04, France
| | - Vanessa Escuret
- Univ Lyon, Université Lyon 1, Faculté de Médecine Lyon Est, CIRI Inserm U1111, équipe Virpath, F-69008, Lyon, France .,Hospices Civils de Lyon, Centre National de Référence virus influenzae France Sud, Laboratoire de Virologie, Groupement Hospitalier Nord, F-69317, Lyon cedex 04, France
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56
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Wu Y, Vavricka CJ, Wu Y, Li Q, Rudrawar S, Thomson RJ, von Itzstein M, Gao GF, Qi J. Atypical group 1 neuraminidase pH1N1-N1 bound to a group 1 inhibitor. Protein Cell 2016; 6:771-3. [PMID: 26334400 PMCID: PMC4598326 DOI: 10.1007/s13238-015-0197-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Ying Wu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Christopher J Vavricka
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yan Wu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Qing Li
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Santosh Rudrawar
- Institute for Glycomics, Griffith University, Gold Coast Campus, Nathan, QLD, 4222, Australia
| | - Robin J Thomson
- Institute for Glycomics, Griffith University, Gold Coast Campus, Nathan, QLD, 4222, Australia
| | - Mark von Itzstein
- Institute for Glycomics, Griffith University, Gold Coast Campus, Nathan, QLD, 4222, Australia
| | - George F Gao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jianxun Qi
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
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57
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Fu L, Bi Y, Wu Y, Zhang S, Qi J, Li Y, Lu X, Zhang Z, Lv X, Yan J, Gao GF, Li X. Structure-Based Tetravalent Zanamivir with Potent Inhibitory Activity against Drug-Resistant Influenza Viruses. J Med Chem 2016; 59:6303-12. [DOI: 10.1021/acs.jmedchem.6b00537] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lifeng Fu
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China
- National
Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, China
- Graduate
University of Chinese Academy of Sciences, Shijingshan District, Beijing 100049, China
| | - Yuhai Bi
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China
| | - Yan Wu
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China
| | - Shanshan Zhang
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China
- Graduate
University of Chinese Academy of Sciences, Shijingshan District, Beijing 100049, China
| | - Jianxun Qi
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China
| | - Yan Li
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China
| | - Xuancheng Lu
- Laboratory
Animal Center, Chinese Center for Disease Control and Prevention, Changping District, Beijing 102206, China
| | - Zhenning Zhang
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China
- Graduate
University of Chinese Academy of Sciences, Shijingshan District, Beijing 100049, China
| | - Xun Lv
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China
| | - Jinghua Yan
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China
- Center
for Influenza Research and Early Warning, Chinese Academy of Sciences (CASCIRE), Chaoyang District, Beijing 100101, China
| | - George F. Gao
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China
- Center
for Influenza Research and Early Warning, Chinese Academy of Sciences (CASCIRE), Chaoyang District, Beijing 100101, China
| | - Xuebing Li
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China
- National
Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, China
- Center
for Influenza Research and Early Warning, Chinese Academy of Sciences (CASCIRE), Chaoyang District, Beijing 100101, China
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58
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Fang S, Wang X, Dong F, Jin T, Liu G, Lu X, Peng B, Wu W, Liu H, Kong D, Tang X, Qin Y, Mei S, Xie X, He J, Ma H, Zhang R, Cheng J. Genomic characterization of influenza A (H7N9) viruses isolated in Shenzhen, Southern China, during the second epidemic wave. Arch Virol 2016; 161:2117-32. [PMID: 27169600 DOI: 10.1007/s00705-016-2872-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Accepted: 04/24/2016] [Indexed: 10/21/2022]
Abstract
There were three epidemic waves of human infection with avian influenza A (H7N9) virus in 2013-2014. While many analyses of the genomic origin, evolution, and molecular characteristics of the influenza A (H7N9) virus have been performed using sequences from the first epidemic wave, genomic characterization of the virus from the second epidemic wave has been comparatively less reported. In this study, an in-depth analysis was performed with respect to the genomic characteristics of 11 H7N9 virus strains isolated from confirmed cases and four H7N9 virus strains isolated from environmental samples in Shenzhen during the second epidemic wave. Phylogenetic analysis demonstrated that six internal segments of the influenza A (H7N9) virus isolated from confirmed cases and environmental samples in Shenzhen were clustered into two different clades and that the origin of the influenza A (H7N9) virus isolated from confirmed cases in Shenzhen was different from that of viruses isolated during the first wave. In addition, H9N2 viruses, which were prevalent in southern China, played an important role in the reassortment of the influenza A (H7N9) virus isolated in Shenzhen. HA-R47K and -T122A, PB2-V139I, PB1-I397M, and NS1-T216P were the signature amino acids of the influenza A (H7N9) virus isolated from confirmed cases in Shenzhen. We found that the HA, NA, M, and PA genes of the A(H7N9) viruses underwent positive selection in the human population. Therefore, enhanced surveillance should be carried out to determine the origin and mode of transmission of the novel influenza A (H7N9) virus and to facilitate the formulation of effective policies for prevention and containment of a human infection epidemics.
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Affiliation(s)
- Shisong Fang
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China
| | - Xin Wang
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China
| | - Fangyuan Dong
- College of Medicine, Jinan University, 601 Huangpu Avenue West, Guangzhou, China
| | - Tao Jin
- BGI-Shenzhen, Shenzhen, 518083, China
| | - Guang Liu
- BGI-Shenzhen, Shenzhen, 518083, China
| | - Xing Lu
- Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China
| | - Bo Peng
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China
| | - Weihua Wu
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China
| | - Hui Liu
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China
| | - Dongfeng Kong
- Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China
| | - Xiujuan Tang
- Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China
| | - Yanmin Qin
- Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China
| | - Shujiang Mei
- Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China
| | - Xu Xie
- Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China
| | - Jianfan He
- Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China
| | - Hanwu Ma
- Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China
| | - Renli Zhang
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China.
| | - Jinquan Cheng
- Shenzhen Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, Guangdong, China.
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59
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Guo L, Wang D, Zhou H, Wu C, Gao X, Xiao Y, Ren L, Paranhos-Baccalà G, Shu Y, Jin Q, Wang J. Cross-reactivity between avian influenza A (H7N9) virus and divergent H7 subtypic- and heterosubtypic influenza A viruses. Sci Rep 2016; 6:22045. [PMID: 26907865 PMCID: PMC4764949 DOI: 10.1038/srep22045] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 02/04/2016] [Indexed: 01/09/2023] Open
Abstract
The number of human avian H7N9 influenza infections has been increasing in China. Understanding their antigenic and serologic relationships is crucial for developing diagnostic tools and vaccines. Here, we evaluated the cross-reactivities and neutralizing activities among H7 subtype influenza viruses and between H7N9 and heterosubtype influenza A viruses. We found strong cross-reactivities between H7N9 and divergent H7 subtypic viruses, including H7N2, H7N3, and H7N7. Antisera against H7N2, H7N3, and H7N7 could also effectively neutralize two distinct H7N9 strains. Two-way cross-reactivities exist within group 2, including H3 and H4, whereas one-way cross-reactivities were found across other groups, including H1, H10, H9, and H13. Our data indicate that the hemaglutinins from divergent H7 subtypes may facilitate the development of vaccines for distinct H7N9 infections. Moreover, serologic diagnoses for H7N9 infections need to consider possible interference from the cross-reactivity of H7N9 with other subtype influenza viruses.
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Affiliation(s)
- Li Guo
- MOH Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux Laboratory, IPB, CAMS-Fondation Mérieux, Institute of Pathogen Biology (IPB), Chinese Academy of Medical Sciences (CAMS) &Peking Union Medical College, Beijing, P. R. China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, P. R. China
| | - Dayan Wang
- Institute of Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, P. R.China
| | - Hongli Zhou
- MOH Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux Laboratory, IPB, CAMS-Fondation Mérieux, Institute of Pathogen Biology (IPB), Chinese Academy of Medical Sciences (CAMS) &Peking Union Medical College, Beijing, P. R. China
| | - Chao Wu
- MOH Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux Laboratory, IPB, CAMS-Fondation Mérieux, Institute of Pathogen Biology (IPB), Chinese Academy of Medical Sciences (CAMS) &Peking Union Medical College, Beijing, P. R. China
| | - Xin Gao
- MOH Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux Laboratory, IPB, CAMS-Fondation Mérieux, Institute of Pathogen Biology (IPB), Chinese Academy of Medical Sciences (CAMS) &Peking Union Medical College, Beijing, P. R. China
| | - Yan Xiao
- MOH Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux Laboratory, IPB, CAMS-Fondation Mérieux, Institute of Pathogen Biology (IPB), Chinese Academy of Medical Sciences (CAMS) &Peking Union Medical College, Beijing, P. R. China
| | - Lili Ren
- MOH Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux Laboratory, IPB, CAMS-Fondation Mérieux, Institute of Pathogen Biology (IPB), Chinese Academy of Medical Sciences (CAMS) &Peking Union Medical College, Beijing, P. R. China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, P. R. China
| | | | - Yuelong Shu
- Institute of Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, P. R.China
| | - Qi Jin
- MOH Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux Laboratory, IPB, CAMS-Fondation Mérieux, Institute of Pathogen Biology (IPB), Chinese Academy of Medical Sciences (CAMS) &Peking Union Medical College, Beijing, P. R. China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, P. R. China
| | - Jianwei Wang
- MOH Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux Laboratory, IPB, CAMS-Fondation Mérieux, Institute of Pathogen Biology (IPB), Chinese Academy of Medical Sciences (CAMS) &Peking Union Medical College, Beijing, P. R. China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, P. R. China
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60
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Tefsen B. Chances and challenges in China. Protein Cell 2015; 7:233-235. [PMID: 26687390 PMCID: PMC4818847 DOI: 10.1007/s13238-015-0235-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Affiliation(s)
- Boris Tefsen
- Department of Biological Sciences, Xi'an Jiaotong-Liverpool University, Suzhou, China.
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61
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Changes in the Length of the Neuraminidase Stalk Region Impact H7N9 Virulence in Mice. J Virol 2015; 90:2142-9. [PMID: 26656694 DOI: 10.1128/jvi.02553-15] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 11/30/2015] [Indexed: 11/20/2022] Open
Abstract
The neuraminidase stalk of the newly emerged H7N9 influenza virus possesses a 5-amino-acid deletion. This study focuses on characterizing the biological functions of H7N9 with varied neuraminidase stalk lengths. Results indicate that the 5-amino-acid deletion had no impact on virus infectivity or replication in vitro or in vivo compared to that of a virus with a full-length stalk, but enhanced virulence in mice was observed for H7N9 encoding a 19- to 20-amino-acid deletion, suggesting that N9 stalk length impacts virulence in mammals, as N1 stalk length does.
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Qi W, Shi W, Li W, Huang L, Li H, Wu Y, Yan J, Jiao P, Zhu B, Ma J, Gao GF, Liao M, Liu D. Continuous reassortments with local chicken H9N2 virus underlie the human-infecting influenza A (H7N9) virus in the new influenza season, Guangdong, China. Protein Cell 2015; 5:878-82. [PMID: 25109943 PMCID: PMC4225483 DOI: 10.1007/s13238-014-0084-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Affiliation(s)
- Wenbao Qi
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
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63
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Thai KM, Le DP, Tran NVK, Nguyen TTH, Tran TD, Le MT. Computational assay of Zanamivir binding affinity with original and mutant influenza neuraminidase 9 using molecular docking. J Theor Biol 2015; 385:31-9. [PMID: 26341387 DOI: 10.1016/j.jtbi.2015.08.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 08/13/2015] [Accepted: 08/14/2015] [Indexed: 01/26/2023]
Abstract
Based upon molecular docking, this study aimed to find notable in silico neuraminidase 9 (NA9) point mutations of the avian influenza A H7N9 virus that possess a Zanamivir resistant property and to determine the lead compound capable of inhibiting these NA9 mutations. Seven amino acids (key residues) at the binding site of neuraminidase 9 responsible for Zanamivir-NA9 direct interactions were identified and 72 commonly occurring mutant NA9 versions were created using the Sybyl-X 2.0 software. The docking scores obtained after Zanamivir was bound to all mutant molecules of NA9 revealed 3 notable mutations R292W, R118P, and R292K that could greatly reduce the binding affinity of the medicine. These 3 mutant NA9 versions were then bound to each of 154 different molecules chosen from 5 groups of compounds to determine which molecule(s) might be capable of inhibiting mutant neuraminidase 9, leading to the discovery of the lead compound of potent mutant NA9 inhibitors. This compound, together with other mutations occurring to NA9 identified in the study, would be used as data for further research regarding neuraminidase inhibitors and synthesizing new viable medications used in the fight against the virus.
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Affiliation(s)
- Khac-Minh Thai
- Department of Medicinal Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy, 41 Dinh Tien Hoang St, Dist 1, Ho Chi Minh City, Viet Nam.
| | - Duy-Phong Le
- Department of Medicinal Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy, 41 Dinh Tien Hoang St, Dist 1, Ho Chi Minh City, Viet Nam
| | - Nguyen-Viet-Khoa Tran
- Department of Medicinal Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy, 41 Dinh Tien Hoang St, Dist 1, Ho Chi Minh City, Viet Nam
| | - Thi-Thu-Ha Nguyen
- Department of Medicinal Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy, 41 Dinh Tien Hoang St, Dist 1, Ho Chi Minh City, Viet Nam
| | - Thanh-Dao Tran
- Department of Medicinal Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy, 41 Dinh Tien Hoang St, Dist 1, Ho Chi Minh City, Viet Nam
| | - Minh-Tri Le
- Department of Medicinal Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy, 41 Dinh Tien Hoang St, Dist 1, Ho Chi Minh City, Viet Nam
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64
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Unique Determinants of Neuraminidase Inhibitor Resistance among N3, N7, and N9 Avian Influenza Viruses. J Virol 2015; 89:10891-900. [PMID: 26292325 DOI: 10.1128/jvi.01514-15] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 08/12/2015] [Indexed: 01/28/2023] Open
Abstract
UNLABELLED Human infections with avian influenza viruses are a serious public health concern. The neuraminidase (NA) inhibitors (NAIs) are the frontline anti-influenza drugs and are the major option for treatment of newly emerging influenza. Therefore, it is essential to identify the molecular markers of NAI resistance among specific NA subtypes of avian influenza viruses to help guide clinical management. NAI-resistant substitutions in NA subtypes other than N1 and N2 have been poorly studied. Here, we identified NA amino acid substitutions associated with NAI resistance among influenza viruses of N3, N7, and N9 subtypes which have been associated with zoonotic transmission. We applied random mutagenesis and generated recombinant influenza viruses carrying single or double NA substitution(s) with seven internal genes from A/Puerto Rico/8/1934 (H1N1) virus. In a fluorescence-based NA inhibition assay, we identified three categories of NA substitutions associated with reduced inhibition by NAIs (oseltamivir, zanamivir, and peramivir): (i) novel subtype-specific substitutions in or near the enzyme catalytic site (R152W, A246T, and D293N, N2 numbering), (ii) subtype-independent substitutions (E119G/V and/or D and R292K), and (iii) substitutions previously reported in other subtypes (Q136K, I222M, and E276D). Our data show that although some markers of resistance are present across NA subtypes, other subtype-specific markers can only be determined empirically. IMPORTANCE The number of humans infected with avian influenza viruses is increasing, raising concerns of the emergence of avian influenza viruses resistant to neuraminidase (NA) inhibitors (NAIs). Since most studies have focused on NAI-resistance in human influenza viruses, we investigated the molecular changes in NA that could confer NAI resistance in avian viruses grown in immortalized monolayer cells, especially those of the N3, N7, and N9 subtypes, which have caused human infections. We identified not only numerous NAI-resistant substitutions previously reported in other NA subtypes but also several novel changes conferring reduced susceptibility to NAIs, which are subtype specific. The findings indicate that some resistance markers are common across NA subtypes, but other markers need to be determined empirically for each subtype. The study also implies that antiviral surveillance monitoring could play a critical role in the clinical management of influenza virus infection and an essential component of pandemic preparedness.
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65
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Emergence of H7N9 Influenza A Virus Resistant to Neuraminidase Inhibitors in Nonhuman Primates. Antimicrob Agents Chemother 2015; 59:4962-73. [PMID: 26055368 DOI: 10.1128/aac.00793-15] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 06/01/2015] [Indexed: 01/05/2023] Open
Abstract
The number of patients infected with H7N9 influenza virus has been increasing since 2013. We examined the efficacy of neuraminidase (NA) inhibitors and the efficacy of a vaccine against an H7N9 influenza virus, A/Anhui/1/2013 (H7N9), isolated from a patient in a cynomolgus macaque model. NA inhibitors (oseltamivir and peramivir) barely reduced the total virus amount because of the emergence of resistant variants with R289K or I219T in NA [residues 289 and 219 in N9 of A/Anhui/1/2013 (H7N9) correspond to 292 and 222 in N2, respectively] in three of the six treated macaques, whereas subcutaneous immunization of an inactivated vaccine derived from A/duck/Mongolia/119/2008 (H7N9) prevented propagation of A/Anhui/1/2013 (H7N9) in all vaccinated macaques. The percentage of macaques in which variant H7N9 viruses with low sensitivity to the NA inhibitors were detected was much higher than that of macaques in which variant H5N1 highly pathogenic influenza virus was detected after treatment with one of the NA inhibitors in our previous study. The virus with R289K in NA was reported in samples from human patients, whereas that with I219T in NA was identified for the first time in this study using macaques, though no variant H7N9 virus was reported in previous studies using mice. Therefore, the macaque model enables prediction of the frequency of emerging H7N9 virus resistant to NA inhibitors in vivo. Since H7N9 strains resistant to NA inhibitors might easily emerge compared to other influenza viruses, monitoring of the emergence of variants is required during treatment of H7N9 influenza virus infection with NA inhibitors.
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66
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Molecular docking of potential inhibitors for influenza H7N9. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2015; 2015:480764. [PMID: 25861376 PMCID: PMC4377397 DOI: 10.1155/2015/480764] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 02/22/2015] [Accepted: 02/22/2015] [Indexed: 01/06/2023]
Abstract
As a new strain of virus emerged in 2013, avian influenza A (H7N9) virus is a threat to the public health, due to its high lethality and pathogenicity. Furthermore, H7N9 has already generated various mutations such as neuraminidase R294K mutation which could make the anti-influenza oseltamivir less effective or ineffective. In this regard, it is urgent to develop new effective anti-H7N9 drug. In this study, we used the general H7N9 neuraminidase and oseltamivir-resistant influenza virus neuraminidase as the acceptors and employed the small molecules including quercetin, chlorogenic acid, baicalein, and oleanolic acid as the donors to perform the molecular docking for exploring the binding abilities between these small molecules and neuraminidase. The results showed that quercetin, chlorogenic acid, oleanolic acid, and baicalein present oseltamivir-comparable high binding potentials with neuraminidase. Further analyses showed that R294K mutation in neuraminidase could remarkably decrease the binding energies for oseltamivir, while other small molecules showed stable binding abilities with mutated neuraminidase. Taken together, the molecular docking studies identified four potential inhibitors for neuraminidase of H7N9, which might be effective for the drug-resistant mutants.
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67
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Tan KX, Jacob SA, Chan KG, Lee LH. An overview of the characteristics of the novel avian influenza A H7N9 virus in humans. Front Microbiol 2015; 6:140. [PMID: 25798131 PMCID: PMC4350415 DOI: 10.3389/fmicb.2015.00140] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 02/06/2015] [Indexed: 01/05/2023] Open
Abstract
The novel avian influenza A H7N9 virus which caused the first human infection in Shanghai, China; was reported on the 31st of March 2013 before spreading rapidly to other Chinese provinces and municipal cities. This is the first time the low pathogenic avian influenza A virus has caused human infections and deaths; with cases of severe respiratory disease with pneumonia being reported. There were 440 confirmed cases with 122 fatalities by 16 May 2014; with a fatality risk of ∼28%. The median age of patients was 61 years with a male-to-female ratio of 2.4:1. The main source of infection was identified as exposure to poultry and there is so far no definitive evidence of sustained person-to-person transmission. The neuraminidase inhibitors, namely oseltamivir, zanamivir, and peramivir; have shown good efficacy in the management of the novel H7N9 virus. Treatment is recommended for all hospitalized patients, and for confirmed and probable outpatient cases; and should ideally be initiated within 48 h of the onset of illness for the best outcome. Phylogenetic analysis found that the novel H7N9 virus is avian in origin and evolved from multiple reassortments of at least four origins. Indeed the novel H7N9 virus acquired human adaptation via mutations in its eight RNA gene segments. Enhanced surveillance and effective global control are essential to prevent pandemic outbreaks of the novel H7N9 virus.
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Affiliation(s)
- Kei-Xian Tan
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University MalaysiaBandar Sunway, Malaysia
| | - Sabrina A. Jacob
- School of Pharmacy, Monash University MalaysiaBandar Sunway, Malaysia
| | - Kok-Gan Chan
- Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of MalayaKuala Lumpur, Malaysia
| | - Learn-Han Lee
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University MalaysiaBandar Sunway, Malaysia
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68
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Lebarbenchon C, Pedersen JC, Sreevatsan S, Ramey AM, Dugan VG, Halpin RA, Ferro PJ, Lupiani B, Enomoto S, Poulson RL, Smeltzer M, Cardona CJ, Tompkins SM, Wentworth DE, Stallknecht DE, Brown JD. H7N9 influenza A virus in turkeys in Minnesota. J Gen Virol 2015; 96:269-276. [PMID: 25351723 PMCID: PMC4298677 DOI: 10.1099/vir.0.067504-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 10/21/2014] [Indexed: 01/04/2023] Open
Abstract
Introductions of H7 influenza A virus (IAV) from wild birds into poultry have been documented worldwide, resulting in varying degrees of morbidity and mortality. H7 IAV infection in domestic poultry has served as a source of human infection and disease. We report the detection of H7N9 subtype IAVs in Minnesota (MN) turkey farms during 2009 and 2011. The full genome was sequenced from eight isolates as well as the haemagglutinin (HA) and neuraminidase (NA) gene segments of H7 and N9 virus subtypes for 108 isolates from North American wild birds between 1986 and 2012. Through maximum-likelihood and coalescent phylogenetic analyses, we identified the recent H7 and N9 IAV ancestors of the turkey-origin H7N9 IAVs, estimated the time and geographical origin of the ancestral viruses, and determined the relatedness between the 2009 and 2011 turkey-origin H7N9 IAVs. Analyses supported that the 2009 and 2011 viruses were distantly related genetically, suggesting that the two outbreaks arose from independent introduction events from wild birds. Our findings further supported that the 2011 MN turkey-origin H7N9 virus was closely related to H7N9 IAVs isolated in poultry in Nebraska during the same year. Although the precise origin of the wild-bird donor of the turkey-origin H7N9 IAVs could not be determined, our findings suggested that, for both the NA and HA gene segments, the MN turkey-origin H7N9 viruses were related to viruses circulating in wild birds between 2006 and 2011 in the Mississippi Flyway.
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Affiliation(s)
- Camille Lebarbenchon
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
| | - Janice C. Pedersen
- National Veterinary Services Laboratories, 1920 Dayton Avenue, Ames, IA 50010, USA
| | - Srinand Sreevatsan
- Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St Paul, MN 55108, USA
| | - Andrew M. Ramey
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
- US Geological Survey Alaska Science Center, 4210 University Drive, Anchorage, AK 99508, USA
| | - Vivien G. Dugan
- J. Craig Venter Institute, 9704 Medical Center Drive, Rockville, MD 20850, USA
| | - Rebecca A. Halpin
- J. Craig Venter Institute, 9704 Medical Center Drive, Rockville, MD 20850, USA
| | - Pamela J. Ferro
- Department of Veterinary Pathobiology, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA
| | - Blanca Lupiani
- Department of Veterinary Pathobiology, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA
| | - Shinichiro Enomoto
- Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St Paul, MN 55108, USA
| | - Rebecca L. Poulson
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
| | - Martin Smeltzer
- National Veterinary Services Laboratories, 1920 Dayton Avenue, Ames, IA 50010, USA
| | - Carol J. Cardona
- Department of Veterinary Biomedical Sciences, University of Minnesota, St Paul, MN 55108, USA
| | - S. Mark Tompkins
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
| | - David E. Wentworth
- J. Craig Venter Institute, 9704 Medical Center Drive, Rockville, MD 20850, USA
| | - David E. Stallknecht
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
| | - Justin D. Brown
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
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Viral lung infections: epidemiology, virology, clinical features, and management of avian influenza A(H7N9). Curr Opin Pulm Med 2015; 20:225-32. [PMID: 24637225 DOI: 10.1097/mcp.0000000000000047] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
PURPOSE OF REVIEW The avian influenza A(H7N9) virus has jumped species barrier and caused severe human infections. Here, we present the virological features relevant to clinical practice, and summarize the epidemiology, clinical findings, diagnosis, treatment, and preventive strategies of A(H7N9) infection. RECENT FINDINGS As of 18 February 2014, A(H7N9) virus has caused 354 infections in mainland China, Taiwan, and Hong Kong with a case-fatality rate of 32%. Elderly men were most affected. Most patients acquired the infection from direct contact with poultry or from a contaminated environment, although person-to-person transmission has likely occurred. A(H7N9) infection has usually presented with severe pneumonia, often complicated by acute respiratory distress syndrome and multiorgan failure. Mild infections have been reported in children and young adults. Nasopharyngeal aspirate and sputum samples should be collected for diagnosis, preferably using reverse transcriptase-PCR. Early treatment with neuraminidase inhibitors improved survival, but the efficacy of antivirals was hampered by resistant mutants. The closure of live poultry markets in affected areas has significantly contributed to the decline in the incidence of human cases. SUMMARY The emergence of A(H7N9) virus represents a significant health threat. High vigilance is necessary so that appropriate treatment can be instituted for the patient and preventive measures can be implemented.
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Wang YT, Chuang LY, Lu CY. Molecular basis of R294K mutation effects of H7N9 neuraminidases with drugs and cyclic peptides: an in silico and experimental study. RSC Adv 2015. [DOI: 10.1039/c5ra10068b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An overview of Shanghai N9/cyclic peptide I complex structure.
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Affiliation(s)
- Yeng-Tseng Wang
- Department of Biochemistry
- College of Medicine
- Kaohsiung Medical University
- Kaohsiung
- Republic of China
| | - Lea-Yea Chuang
- Department of Biochemistry
- College of Medicine
- Kaohsiung Medical University
- Kaohsiung
- Republic of China
| | - Chi-Yu Lu
- Department of Biochemistry
- College of Medicine
- Kaohsiung Medical University
- Kaohsiung
- Republic of China
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71
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Tran N, Van T, Nguyen H, Le L. Identification of novel compounds against an R294K substitution of influenza A (H7N9) virus using ensemble based drug virtual screening. Int J Med Sci 2015; 12:163-76. [PMID: 25589893 PMCID: PMC4293182 DOI: 10.7150/ijms.10826] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 12/16/2014] [Indexed: 11/24/2022] Open
Abstract
Influenza virus H7N9 foremost emerged in China in 2013 and killed hundreds of people in Asia since they possessed all mutations that enable them to resist to all existing influenza drugs, resulting in high mortality to human. In the effort to identify novel inhibitors combat resistant strains of influenza virus H7N9; we performed virtual screening targeting the Neuraminidase (NA) protein against natural compounds of traditional Chinese medicine database (TCM) and ZINC natural products. Compounds expressed high binding affinity to the target protein was then evaluated for molecular properties to determine drug-like molecules. 4 compounds showed their binding energy less than -11 Kcal/mol were selected for molecular dynamics (MD) simulation to capture intermolecular interactions of ligand-protein complexes. The molecular mechanics/Poisson-Boltzmann surface area (MM/PBSA) method was utilized to estimate binding free energy of the complex. In term of stability, NA-7181 (IUPAC namely {9-Hydroxy-10-[3-(trifluoromrthyl) cyclohexyl]-4.8-diazatricyclo [6.4.0.02,6]dodec-4-yl}(perhydro-1H-inden-5-yl)formaldehyde) achieved stable conformation after 20 ns and 27 ns for ligand and protein root mean square deviation, respectively. In term of binding free energy, 7181 gave the negative value of -30.031 (KJ/mol) indicating the compound obtained a favourable state in the active site of the protein.
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Affiliation(s)
- Nhut Tran
- 1. Life Science Laboratory, Institute for Computational Science and Technology at Ho Chi Minh City, SBI building, Quang Trung Software City, Tan Chanh Hiep Ward, District 12, Ho Chi Minh City, Vietnam ; 2. School of Biotechnology, International University - Vietnam National University Ho Chi Minh City, Quarter 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Thanh Van
- 1. Life Science Laboratory, Institute for Computational Science and Technology at Ho Chi Minh City, SBI building, Quang Trung Software City, Tan Chanh Hiep Ward, District 12, Ho Chi Minh City, Vietnam ; 2. School of Biotechnology, International University - Vietnam National University Ho Chi Minh City, Quarter 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Hieu Nguyen
- 1. Life Science Laboratory, Institute for Computational Science and Technology at Ho Chi Minh City, SBI building, Quang Trung Software City, Tan Chanh Hiep Ward, District 12, Ho Chi Minh City, Vietnam
| | - Ly Le
- 1. Life Science Laboratory, Institute for Computational Science and Technology at Ho Chi Minh City, SBI building, Quang Trung Software City, Tan Chanh Hiep Ward, District 12, Ho Chi Minh City, Vietnam ; 2. School of Biotechnology, International University - Vietnam National University Ho Chi Minh City, Quarter 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
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72
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He JY, Li C, Wu G. Discovery of potential drugs for human-infecting H7N9 virus containing R294K mutation. DRUG DESIGN DEVELOPMENT AND THERAPY 2014; 8:2377-90. [PMID: 25489236 PMCID: PMC4257025 DOI: 10.2147/dddt.s74061] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Background After the first epidemic wave from February through May 2013, the influenza A (H7N9) virus emerged and has followed a second epidemic wave since June 2013. As of June 27, 2014, the outbreak of H7N9 had caused 450 confirmed cases of human infection, with 165 deaths included. The case-fatality rate of all confirmed cases is about 36%, making the H7N9 virus a significant threat to people’s health. At present, neuraminidase inhibitors are the only licensed antiviral medications available to treat H7N9 infections in humans. Oseltamivir is the most commonly used inhibitor, and it is also a front-line drug for the threatening H7N9. Unfortunately, it has been reported that patients treated with oseltamivir can induce R294K (Arg294Lys) substitution in the H7N9 virus, which is a rare mutation and can reduce the antiviral efficacy of inhibitors. Even worse, deaths caused by such mutation after oseltamivir treatment have already been reported, indicating that the need to find substitutive neuraminidase inhibitors for currently available drugs to treat drug-resistant H7N9 is really pressing. Materials and methods First, the structure of H7N9 containing the R294K substitution was downloaded from the Protein Data Bank, and structural information of approved drugs was downloaded from the ZINC (ZINC Is Not Commercial) database. Taking oseltamivir carboxylate as a reference drug, we then filtered these molecules through virtual screening to find out potential inhibitors targeting the mutated H7N9 virus. For further evaluation, we carried out a 14 ns molecular dynamic simulation for each H7N9–drug complex and calculated the binding energy for each candidate drug. Results We found five inhibitors that could be candidate drugs for treating the mutated H7N9 virus. Docking poses showed these drugs could bind to the virus effectively, with the contribution of hydrogen bonds and hydrophobic interactions. With regard to the molecular dynamic simulations, receptor–ligand complexes formed by these candidate drugs were more stable than the one formed by oseltamivir carboxylate. The binding energy of oseltamivir carboxylate was −122.4 kJ/mol, while those for these potential inhibitors were −417.5, −404.7, −372.2, −304.3, and −289.9 kJ/mol, much better than the reference drug. Conclusion Given the current and future threat of the mutated H7N9 virus, it is urgent that potent drugs and effective antiviral therapeutics be found. Our study therefore is able to complement currently available drugs for influenza A infectors and helps to prevent the ongoing threat of H7N9 virus.
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Affiliation(s)
- Jiao-Yu He
- College of Life Sciences and Key Laboratory for Bio-resources of Ministry of Education, Sichuan University, Chengdu, People's Republic of China
| | - Cheng Li
- College of Agronomy, Sichuan Agricultural University, Chengdu, People's Republic of China
| | - Guo Wu
- College of Life Sciences, Sichuan Normal University, Chengdu, People's Republic of China
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Husain M. Avian influenza A (H7N9) virus infection in humans: Epidemiology, evolution, and pathogenesis. INFECTION GENETICS AND EVOLUTION 2014; 28:304-12. [DOI: 10.1016/j.meegid.2014.10.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 10/15/2014] [Accepted: 10/17/2014] [Indexed: 12/09/2022]
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74
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Phylogenetics of varied subtypes of avian influenza viruses in China: potential threat to humans. Protein Cell 2014; 5:253-7. [PMID: 24622845 PMCID: PMC3978160 DOI: 10.1007/s13238-014-0036-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
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Gao HN, Yao HP, Liang WF, Wu XX, Wu HB, Wu NP, Yang SG, Zhang Q, Su KK, Guo J, Zheng SF, Zhu YX, Chen HL, Yuen KY, Li LJ. Viral genome and antiviral drug sensitivity analysis of two patients from a family cluster caused by the influenza A(H7N9) virus in Zhejiang, China, 2013. Int J Infect Dis 2014; 29:254-8. [PMID: 25462187 DOI: 10.1016/j.ijid.2014.10.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 10/12/2014] [Accepted: 10/14/2014] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVES In the winter of 2013, people were facing the risk of human-to-human transmission of the re-emerging influenza A(H7N9) virus. We report herein information on the clinical features of two patients from the same family infected with this virus, the genomic sequences of the viruses harbored, and antiviral drug sensitivity. METHODS Clinical and epidemiological data of two patients from the same family were collected and analyzed. Sequencing was done for the viruses isolated from these two patients and one epidemiologically related chicken, and the sequences of the eight gene segments of the viruses were analyzed phylogenetically. The sensitivity of the viruses to antiviral drug treatment was determined by neuraminidase inhibitor susceptibility test. RESULTS The two patients from one family cluster shared the same symptoms but had different outcomes, and had a strong epidemiological link. Three strains, two from these two patients and one from the chicken, were isolated. Genome sequencing and analyses of phylogenetic trees demonstrated that the two viruses were almost identical. We noted the presence of the PB2 E627K amino acid substitution that was not present in isolates from the first wave, as well as two new mutations in the NA gene and six in the PB2 gene. Drug sensitivity testing showed that the new isolates were resistant to oseltamivir but sensitive to peramivir. CONCLUSIONS The two patients from one family cluster were probable human-to-human transmission cases. The new isolates were sensitive to peramivir but showed reduced sensitivity to oseltamivir.
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Affiliation(s)
- Hai Nv Gao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou 310031, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Hang Ping Yao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou 310031, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Wei Feng Liang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou 310031, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Xiao Xin Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou 310031, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Hai Bo Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou 310031, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Nan Ping Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou 310031, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Shi Gui Yang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou 310031, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Qiong Zhang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou 310031, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Kun Kai Su
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou 310031, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Jing Guo
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou 310031, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Shu Fa Zheng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou 310031, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Yi Xin Zhu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou 310031, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Hong Lin Chen
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China; State Key Laboratory for Emerging Infectious Diseases, Department of Microbiology, The University of Hong Kong, Hong Kong SAR, China
| | - Kwok-Yung Yuen
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China; State Key Laboratory for Emerging Infectious Diseases, Department of Microbiology, The University of Hong Kong, Hong Kong SAR, China
| | - Lan Juan Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou 310031, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China.
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76
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Assessment of the internal genes of influenza A (H7N9) virus contributing to high pathogenicity in mice. J Virol 2014; 89:2-13. [PMID: 25320305 DOI: 10.1128/jvi.02390-14] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
UNLABELLED The recently identified H7N9 influenza A virus has caused severe economic losses and worldwide public concern. Genetic analysis indicates that its six internal genes all originated from H9N2 viruses. However, the H7N9 virus is more highly pathogenic in humans than H9N2, which suggests that the internal genes of H7N9 have mutated. To analyze which H7N9 virus internal genes contribute to its high pathogenicity, a series of reassortants was generated by reverse genetics, with each virus containing a single internal gene of the typical A/Anhui/1/2013 (H7N9) (AH-H7N9) virus in the genetic background of the A/chicken/Shandong/lx1023/2007 (H9N2) virus. The replication ability, polymerase activity, and pathogenicity of these viruses were then evaluated in vitro and in vivo. These recombinants displayed high genetic compatibility, and the H7N9-derived PB2, M, and NP genes were identified as the virulence genes for the reassortants in mice. Further investigation confirmed that the PB2 K627 residue is critical for the high pathogenicity of the H7N9 virus and the reassortant containing the H7N9-derived PB2 segment (H9N2-AH/PB2). Notably, the H7N9-derived PB2 gene displayed greater compatibility with the H9N2 genome than that of H7N9, endowing the H9N2-AH/PB2 reassortant with greater viability and virulence than the parental H7N9 virus. In addition, the H7N9 virus, with the exception of the H9N2 reassortants, could effectively replicate in human A549 cells. Our results indicate that PB2, M, and NP are the key virulence genes, together with the surface hemagglutinin (HA) and neuraminidase (NA) proteins, contributing to the high infectivity of the H7N9 virus in humans. IMPORTANCE To date, the novel H7N9 influenza A virus has caused 437 human infections, with approximately 30% mortality. Previous work has primarily focused on the two viral surface proteins, HA and NA, but the contribution of the six internal genes to the high pathogenicity of H7N9 has not been systematically studied. Here, the H9N2 virus was used as a genetic backbone to evaluate the virulence genes of H7N9 virus in vitro and in vivo. Our data indicate that the PB2, M, and NP genes play important roles in viral infection in mice and, together with HA and NA, contribute to the high infectivity of the H7N9 virus in humans.
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77
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Watanabe T, Watanabe S, Maher EA, Neumann G, Kawaoka Y. Pandemic potential of avian influenza A (H7N9) viruses. Trends Microbiol 2014; 22:623-31. [PMID: 25264312 DOI: 10.1016/j.tim.2014.08.008] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 08/21/2014] [Accepted: 08/26/2014] [Indexed: 12/30/2022]
Abstract
Avian influenza viruses rarely infect humans, but the recently emerged avian H7N9 influenza viruses have caused sporadic infections in humans in China, resulting in 440 confirmed cases with 122 fatalities as of 16 May 2014. In addition, epidemiologic surveys suggest that there have been asymptomatic or mild human infections with H7N9 viruses. These viruses replicate efficiently in mammals, show limited transmissibility in ferrets and guinea pigs, and possess mammalian-adapting amino acid changes that likely contribute to their ability to infect mammals. In this review, we summarize the characteristic features of the novel H7N9 viruses and assess their pandemic potential.
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Affiliation(s)
- Tokiko Watanabe
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, 575 Science Drive, Madison, WI 53711, USA; ERATO Infection-Induced Host Responses Project, Japan Science and Technology Agency, Saitama 332-0012, Japan; Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
| | - Shinji Watanabe
- ERATO Infection-Induced Host Responses Project, Japan Science and Technology Agency, Saitama 332-0012, Japan; Laboratory of Veterinary Microbiology, Department of Veterinary Sciences, University of Miyazaki, Miyazaki, 889-2192, Japan
| | - Eileen A Maher
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, 575 Science Drive, Madison, WI 53711, USA
| | - Gabriele Neumann
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, 575 Science Drive, Madison, WI 53711, USA
| | - Yoshihiro Kawaoka
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, 575 Science Drive, Madison, WI 53711, USA; ERATO Infection-Induced Host Responses Project, Japan Science and Technology Agency, Saitama 332-0012, Japan; Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan; Department of Special Pathogens, International Research Center for Infectious Diseases, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108-8639, Japan.
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78
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Marjuki H, Mishin VP, Chesnokov AP, Jones J, De La Cruz JA, Sleeman K, Tamura D, Nguyen HT, Wu HS, Chang FY, Liu MT, Fry AM, Cox NJ, Villanueva JM, Davis CT, Gubareva LV. Characterization of drug-resistant influenza A(H7N9) variants isolated from an oseltamivir-treated patient in Taiwan. J Infect Dis 2014; 211:249-57. [PMID: 25124927 DOI: 10.1093/infdis/jiu447] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Patients contracting influenza A(H7N9) infection often developed severe disease causing respiratory failure. Neuraminidase (NA) inhibitors (NAIs) are the primary option for treatment, but information on drug-resistance markers for influenza A(H7N9) is limited. METHODS Four NA variants of A/Taiwan/1/2013(H7N9) virus containing a single substitution (NA-E119V, NA-I222K, NA-I222R, or NA-R292K) recovered from an oseltamivir-treated patient were tested for NAI susceptibility in vitro; their replicative fitness was evaluated in cell culture, mice, and ferrets. RESULTS NA-R292K led to highly reduced inhibition by oseltamivir and peramivir, while NA-E119V, NA-I222K, and NA-I222R caused reduced inhibition by oseltamivir. Mice infected with any virus showed severe clinical signs with high mortality rates. NA-I222K virus was the most virulent in mice, whereas virus lacking NA change (NA-WT) and NA-R292K virus seemed the least virulent. Sequence analysis suggests that PB2-S714N increased virulence of NA-I222K virus in mice; NS1-K126R, alone or in combination with PB2-V227M, produced contrasting effects in NA-WT and NA-R292K viruses. In ferrets, all viruses replicated to high titers in the upper respiratory tract but produced only mild illness. NA-R292K virus, showed reduced replicative fitness in this animal model. CONCLUSIONS Our data highlight challenges in assessment of the replicative fitness of H7N9 NA variants that emerged in NAI-treated patients.
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Affiliation(s)
- Henju Marjuki
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention
| | - Vasiliy P Mishin
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention
| | - Anton P Chesnokov
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention Battelle Memorial Institute, Atlanta, Georgia
| | - Joyce Jones
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention
| | - Juan A De La Cruz
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention Battelle Memorial Institute, Atlanta, Georgia
| | - Katrina Sleeman
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention
| | - Daisuke Tamura
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention Oak Ridge Institute for Science and Education, Tennessee
| | - Ha T Nguyen
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention Battelle Memorial Institute, Atlanta, Georgia
| | - Ho-Sheng Wu
- Taiwan Centers for Disease Control, Taipei City
| | | | | | - Alicia M Fry
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention
| | - Nancy J Cox
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention
| | - Julie M Villanueva
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention
| | - Charles T Davis
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention
| | - Larisa V Gubareva
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention
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Chua BY, Brown LE, Jackson DC. Considerations for the rapid deployment of vaccines against H7N9 influenza. Expert Rev Vaccines 2014; 13:1327-37. [PMID: 25017993 DOI: 10.1586/14760584.2014.938641] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The threat of an outbreak of avian-origin influenza H7N9 and the devastating consequences that a pandemic could have on global population health and economies has mobilized programs of constant surveillance and the implementation of preemptive plans. Central to these plans is the production of prepandemic vaccines that can be rapidly deployed to minimize disease severity and deaths resulting from such an occurrence. In this article, we review current H7N9 vaccine strategies in place and the available technologies and options that can help accelerate vaccine production and increase dose-sparing capabilities to provide enough vaccines to cover the population. We also present possible means of reducing disease impact during the critical period after an outbreak occurs before a strain matched vaccine becomes available and consider the use of existing stockpiles and seed strains of phylogenetically related subtypes, alternate vaccination regimes and vaccine forms that induce cross-reactive immunity.
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Affiliation(s)
- Brendon Y Chua
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria 3010, Australia
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80
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Structure of influenza virus N7: the last piece of the neuraminidase "jigsaw" puzzle. J Virol 2014; 88:9197-207. [PMID: 24899180 DOI: 10.1128/jvi.00805-14] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
UNLABELLED There are nine subtypes of influenza A virus neuraminidase (NA), N1 to N9. In addition, influenza B virus also contains NA, and there are two influenza virus NA-like molecules, N10 and N11, which were recently identified from bats. Crystal structures for all of these proteins have been solved, with the exception of N7, and there is no published report of N6, although a structure has been deposited in the Protein Data Bank. Here, we present the N7 and N6 structures at 2.1 Å and 1.8 Å, respectively. Structural comparison of all NA subtypes shows that both N7 and N6 highly resemble typical group 2 NA structures with some special characteristics, including an additional cavity adjacent to their active sites formed by novel 340-loop conformations. Comparative analysis also revealed new structural insights into the N-glycosylation, calcium binding, and second sialic acid binding site of influenza virus NA. This comprehensive study is critical for understanding the complexity of the most successful influenza drug target and for the structure-based design of novel influenza inhibitors. IMPORTANCE Influenza viruses impose a great burden on society, by the human-adapted seasonal types as well as by variants that occasionally jump from the avian reservoir to infect humans. The surface glycoprotein neuraminidase (NA) is essential for the propagation of the virus and currently the most successfully drug-targeted molecule. Therefore, the structural and functional analysis of NA is critical for the prevention and control of influenza infections. There are nine subtypes of influenza A virus NA (N1 to N9). In addition, influenza B virus also contains NA, and there are two influenza NA-like molecules, N10 and N11, which were recently identified in bats. Crystal structures for all of these proteins have been solved and reported with the exception of N7 and N6. The structural analysis of influenza virus N7 and N6 presented in this study therefore completes the puzzle and adds to a comprehensive understanding of influenza virus NA.
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Abstract
Influenza virus remains one of the most important disease-causing viruses owing to its high adaptability and even higher contagious nature. Thus, it poses a constant threat of pandemic, engulfing a large population within the smallest possible time interval. A similar threat was anticipated with the identification of the novel H7N9 virus in China on 30 March 2013. Detection of transmission of the virus between humans has caused a stir with the identification of family clusters along with sporadic infections all across China. In this review we analyze the potential of the novel H7N9 virus as a probable cause of a pandemic and the possible consequences thereof.
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Affiliation(s)
- Himani Nailwal
- a Virology Group, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi 110067, India
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82
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Liu J, Xiao H, Wu Y, Liu D, Qi X, Shi Y, Gao GF. H7N9: a low pathogenic avian influenza A virus infecting humans. Curr Opin Virol 2014; 5:91-7. [PMID: 24705093 PMCID: PMC7102866 DOI: 10.1016/j.coviro.2014.03.001] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 03/04/2014] [Accepted: 03/06/2014] [Indexed: 11/15/2022]
Abstract
Major reassortment and transmission features of H7N9 were summarized. Structural bases of interspecies transmission/drug resistance of H7N9 were proposed. We summarized the major immunological characteristics of H7N9 infection. The major strategies for vaccine development were proposed. The disease burden of H7N9 infection was calculated.
Human infections by the newly reassorted avian influenza A (H7N9) virus were reported for the first time in early 2013, and the virus was confirmed to be a low pathogenic avian influenza virus in poultry. Because continuously reported cases have been increasing since the summer of 2013, this novel virus poses a potential threat to public health in China and is attracting broad attention worldwide. In this review, we summarize and discuss the characteristics of the H7N9 virus revealed by the recent timely studies from the perspectives of epidemiology, host preference, clinical manifestations, immunopathogenesis, drug resistance, vaccine development, and burden of disease. This knowledge about the novel avian-origin H7N9 virus will provide a useful reference for clinical interventions of human infections and help to rapidly pave the way to develop an efficient and safe vaccine.
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Affiliation(s)
- Jun Liu
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), Beijing 102206, China.
| | - Haixia Xiao
- Laboratory of Protein Engineering and Vaccines, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
| | - Yan Wu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Di Liu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiaopeng Qi
- National Center for Public Health Surveillance and Information Services, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Yi Shi
- Research Network of Immunity and Health, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China
| | - George F Gao
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), Beijing 102206, China; CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; Research Network of Immunity and Health, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China; Office of Director-General, Chinese Center for Disease Control and Prevention (China CDC), Beijing 102206, China.
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83
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Risk assessment of human infection with avian influenza A (H7N9) virus in Taiwan. J Formos Med Assoc 2014; 113:397-9. [PMID: 24630489 DOI: 10.1016/j.jfma.2014.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 02/07/2014] [Indexed: 11/18/2022] Open
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84
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Richards MR, Brant MG, Boulanger MJ, Cairo CW, Wulff JE. Conformational analysis of peramivir reveals critical differences between free and enzyme-bound states. MEDCHEMCOMM 2014. [DOI: 10.1039/c4md00168k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An analysis of the conformational distribution of peramivir, a potent anti-influenza compound, in solution and the solid state reveals a large conformational change required for enzyme binding.
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Affiliation(s)
- Michele R. Richards
- Alberta Glycomics Centre
- Department of Chemistry
- University of Alberta
- Edmonton Alberta T6G 2G2, Canada
| | - Michael G. Brant
- Department of Chemistry
- University of Victoria
- Victoria British Columbia V8W 3V6, Canada
| | - Martin J. Boulanger
- Department of Biochemistry and Microbiology
- University of Victoria
- Victoria British Columbia V8W 3V6, Canada
| | - Christopher W. Cairo
- Alberta Glycomics Centre
- Department of Chemistry
- University of Alberta
- Edmonton Alberta T6G 2G2, Canada
| | - Jeremy E. Wulff
- Department of Chemistry
- University of Victoria
- Victoria British Columbia V8W 3V6, Canada
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85
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Abstract
How the novel influenza H7N9 virus crossed species barrier from avian to human is intriguing. Extrapolation from previous studies on H5N1 can be misleading as illustrated by crystallographic studies on the H7 hemagglutinin with G226L substitution; crystal structure of the neuraminidase N9 showed that R294K substitution interferes with binding to sialic acid or antiviral drugs and reduces viral fitness.
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Affiliation(s)
- Kwok-Yung Yuen
- State Key Laboratory for Emerging Infectious Diseases, Department of Microbiology, The University of Hong Kong, Pokfulam Road, Pokfulam, Hong Kong SAR, China
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