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Mao Z, Lei H, Chen R, Ren S, Liu B, Gao Z. CRISPR/Cas13a analysis based on NASBA amplification for norovirus detection. Talanta 2024; 280:126725. [PMID: 39167939 DOI: 10.1016/j.talanta.2024.126725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 05/22/2024] [Accepted: 08/16/2024] [Indexed: 08/23/2024]
Abstract
Human norovirus (HuNoV) is a leading cause of foodborne diseases worldwide, making rapid and accurate detection crucial for prevention and control. In recent years, the CRISPR/Cas13a system, known for its single-base resolution in RNA recognition and unique collateral cleavage activity, is particularly suitable for sensitive and rapid RNA detection. However, isothermal amplification-based CRISPR/Cas13 assays often require an external transcription step, complicating the detection process. In our study, an efficient diagnostic technique based on the NASBA/Cas13a system was established to identify conserved regions at the ORF1-ORF2 junction of norovirus. The RNA amplification techniques [Nucleic Acid Sequence-Based Amplification (NASBA)] integrates reverse transcription and transcription steps, enabling sensitive, accurate, and rapid enrichment of low-abundance RNA. Furthermore, the CRISPR/Cas13a system provides secondary precise recognition of the amplified products, generating a fluorescence signal through its activated accessory collateral cleavage activity. We optimized the reaction kinetics parameters of Cas13a and achieved a detection limit as low as 51pM. The conditions for the cascade reaction involving CRISPR analysis and RNA amplification were optimized. Finally, we validated the reliability and accuracy of the NASBA/Cas13a method by detecting norovirus in shellfish, achieving results comparable to qRT-PCR in a shorter time and detecting viral loads as low as 10 copies/μL.
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Affiliation(s)
- Zefeng Mao
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China; Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, China
| | - Huang Lei
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Ruipeng Chen
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, China
| | - Shuyue Ren
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, China.
| | - Baolin Liu
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.
| | - Zhixian Gao
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, China.
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Atochina-Vasserman EN, Lindesmith LC, Mirabelli C, Ona NA, Reagan EK, Brewer-Jensen PD, Mercado-Lopez X, Shahnawaz H, Meshanni JA, Baboo I, Mallory ML, Zweigart MR, May SR, Mui BL, Tam YK, Wobus CE, Baric RS, Weissman D. Bivalent norovirus mRNA vaccine elicits cellular and humoral responses protecting human enteroids from GII.4 infection. NPJ Vaccines 2024; 9:182. [PMID: 39353926 PMCID: PMC11445234 DOI: 10.1038/s41541-024-00976-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Accepted: 09/19/2024] [Indexed: 10/03/2024] Open
Abstract
Nucleoside-modified mRNA-LNP vaccines have revolutionized vaccine development against infectious pathogens due to their ability to elicit potent humoral and cellular immune responses. In this article, we present the results of the first norovirus vaccine candidate employing mRNA-LNP platform technology. The mRNA-LNP bivalent vaccine encoding the major capsid protein VP1 from GI.1 and GII.4 of human norovirus, generated high levels of neutralizing antibodies, robust cellular responses, and effectively protected human enteroids from infection by the most prevalent genotype (GII.4). These results serve as a proof of concept, demonstrating that a modified-nucleoside mRNA-LNP vaccine based on norovirus VP1 sequences can stimulate an immunogenic response in vivo and generates neutralizing antibodies capable of preventing viral infection in models of human gastrointestinal tract infection.
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Affiliation(s)
- Elena N Atochina-Vasserman
- Institue for RNA Innovation, the University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
| | - Lisa C Lindesmith
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Carmen Mirabelli
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI, USA
| | - Nathan A Ona
- Institue for RNA Innovation, the University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Erin K Reagan
- Institue for RNA Innovation, the University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Paul D Brewer-Jensen
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Xiomara Mercado-Lopez
- Institue for RNA Innovation, the University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Hamna Shahnawaz
- Institue for RNA Innovation, the University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Jaclynn A Meshanni
- Institue for RNA Innovation, the University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Ishana Baboo
- Institue for RNA Innovation, the University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Michael L Mallory
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Mark R Zweigart
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Samantha R May
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | | | - Ying K Tam
- Acuitas Therapeutics Inc, Vancouver, B.C., Canada
| | - Christiane E Wobus
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI, USA
| | - Ralph S Baric
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Drew Weissman
- Institue for RNA Innovation, the University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
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Ma J, Chen Q, Yuan F, Cao M, Gao J, Yang C, Tan M, Xian R, Gao L, Kuai W. Prevalence and genotype distribution of norovirus in Ningxia Hui Autonomous Region, China, from 2011 to 2022. Virol J 2024; 21:232. [PMID: 39334155 PMCID: PMC11430420 DOI: 10.1186/s12985-024-02498-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 09/09/2024] [Indexed: 09/30/2024] Open
Abstract
The norovirus (NoV) genome is diverse. Therefore, this study explored the epidemiological characteristics and genetic features of NoV in Ningxia Hui Autonomous Region, China, from 2011 to 2022 to clarify the genetic diversity in this region. Stool samples were screened for NoV and then sequenced and genotyped. In total, 1,788 of 13,083 specimens were NoV -positive (13.67%); 204 (1.56%) and 1,584 (12.11%) cases were GI and GII, respectively. Additionally, 559 were NoV infection with other viruses (4.27%), primarily with rotavirus (277/559, 49.55%). The NoV incidence rate was the highest among children aged 0-2 years (18.09%, 1054/5,828) and lowest among adults aged 45-64 years (110/1,495, 7.36%); it was also higher in the winter and spring than in the other seasons. GI.3[P3] was the dominant GI genotype. The dominant GII genotype changed roughly every two years. In the GII group, GII.4 was the most common genotype (46.79%), followed by GII.3 (21.34%), GII.2 (12.34%), and GII.17 (9.77%). There were three variants of GII.4 Den Haag, GII.4 New Orleans and GII.4 Sydney identified in the detected GII.4 strains, with GII.4 Sydney dominating. The GII.4 (87.36%), GII.3 (86.35%), and GII.2 (72.92%) strains were primarily detected in children, whereas it was the GII.17 (52.63%) strain in adults. Overall, the NoV genotypes in the Ningxia Hui Autonomous Region were diverse. Primarily, GII groups were dominant, but this changed over time.
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Affiliation(s)
- Jiangtao Ma
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan, 750004, China.
| | - Qian Chen
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan, 750004, China
| | - Fang Yuan
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan, 750004, China
| | - Min Cao
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan, 750004, China
| | - Jianwei Gao
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan, 750004, China
| | - Cong Yang
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan, 750004, China
| | - Ming Tan
- National Institute for Viral Disease Control and Prevention, Chinese Center for Viral Disease Control and Prevention, Beijing, 102206, China
| | - Ran Xian
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan, 750004, China
- School of Public Health, Ningxia Medical University, Yinchuan, 750001, China
| | - Lei Gao
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan, 750004, China
- School of Public Health, Ningxia Medical University, Yinchuan, 750001, China
| | - Wenhe Kuai
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan, 750004, China
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Xu D, Li J, Han L, Chen D, Bao W, Li L, Wang H, Shui J, Liang R, Liu Y, Liu Y, Cai K, Chen W. Epidemics and diversity of norovirus variants with acute gastroenteritis outbreak in Hongshan District, Wuhan City, China, 2021-2023. J Infect Public Health 2024; 17:102499. [PMID: 39067200 DOI: 10.1016/j.jiph.2024.102499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 07/09/2024] [Accepted: 07/11/2024] [Indexed: 07/30/2024] Open
Abstract
BACKGROUND Norovirus is the predominant pathogen causing foodborne illnesses and acute gastroenteritis (AGE) outbreaks worldwide, imposing a significant disease burden. This study aimed to investigate the epidemiological characteristics and genotypic diversity of norovirus outbreaks in Hongshan District, Wuhan City. METHODS A total of 463 AGE cases from 39 AGE-related outbreaks in Hongshan District between January 1, 2021, and June 30, 2023, were included in the study. Reverse transcription-polymerase chain reaction (RT-PCR) was used to identify norovirus types GI and GII in anal swab samples from all cases. Norovirus-positive samples were sequenced and analyzed for the open reading frame (ORF) 1/ORF2 hinge region. RESULTS 26 norovirus infectious outbreaks were reported among 39 acute diarrheal outbreaks, including 14 outbreaks in kindergartens, 8 in elementary schools, and 4 in universities. Based on clinical symptoms and epidemiological investigations, a total of 1295 individuals were identified as having been exposed to norovirus, yielding an attack rate of 35.75 %. A higher proportion of outbreaks was observed during the winter and spring seasons (38.46 %). Additionally, norovirus-positive samples were subjected to sequencing and analysis of the open reading frame (ORF) 1/ORF2 hinge region. Genotypic data for norovirus was successfully obtained from 18 (69.23 %) of the infectious outbreaks, revealing 10 distinct recombinant genotypes. GII.4 Sydney 2012 [P31] and GII.17[P17] were the predominant strains in 2021 and 2022, GII.3 [P12] emerged as the dominant strain in 2023. CONCLUSION Norovirus outbreaks in Hongshan District predominantly occurred in crowded educational institutions, with peaks in the cold season and a high attack rate in universities. GII.3 [P12] has become the locally predominant strain.
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Affiliation(s)
- Dandan Xu
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China; Wuhan Hongshan Center for Disease Control and Prevention, Wuhan, Hubei 430065, China
| | - Jing Li
- Hubei Provincial Center for Disease Control and Prevention, Wuhan, Hubei 430079, China
| | - Lingyan Han
- Wuhan Hongshan Center for Disease Control and Prevention, Wuhan, Hubei 430065, China
| | - Ding Chen
- Wuhan Hongshan Center for Disease Control and Prevention, Wuhan, Hubei 430065, China
| | - Wubo Bao
- Wuhan Hongshan Center for Disease Control and Prevention, Wuhan, Hubei 430065, China
| | - Li Li
- Wuhan Hongshan Center for Disease Control and Prevention, Wuhan, Hubei 430065, China
| | - Huawei Wang
- Wuhan Hongshan Center for Disease Control and Prevention, Wuhan, Hubei 430065, China
| | - Jinglin Shui
- Wuhan Hongshan Center for Disease Control and Prevention, Wuhan, Hubei 430065, China
| | - Ruyi Liang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Yang Liu
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Yingle Liu
- The State Key Laboratory of Virology of China,Wuhan, Hubei 430072, China
| | - Kun Cai
- Hubei Provincial Center for Disease Control and Prevention, Wuhan, Hubei 430079, China.
| | - Weihong Chen
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
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Park EY, Maehata S, Khoris IM, Achadu OJ. Signal-amplified surface-enhanced Raman scattering using core/shell satellite nanoparticles for norovirus detection. Mikrochim Acta 2024; 191:560. [PMID: 39180589 DOI: 10.1007/s00604-024-06600-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2024] [Accepted: 07/31/2024] [Indexed: 08/26/2024]
Abstract
The development of an innovative approach is explored to amplify the signal of a surface-enhanced Raman scattering (SERS)-based detection system using a novel nanotag: Au@Ag NPs covered by satellite AuNPs and conjugated by 4-mercaptbenzoic acid (4-MBA) as a Raman tag (Au@Ag-MBA-AuNPs). The Au@Ag-MBA-AuNPs nanotags showed strong SERS activities with an enhancement factor in the 108 order of magnitude. This indicates the formation of many hot spots due to the combination of core-shell nanoparticles and satellite AuNPs on the surface of Au@Ag-MBA NPs. The newly fabricated nanotags were employed in a small-sized Palmtop Raman spectrometer. A concentration-dependent increase in SERS intensity was observed in the norovirus-like particle (NoV-LP) concentration range 10 fg/mL to 100 pg/mL with a detection limit of 0.76 fg/mL. Even in the severe interfering matrices, this detection method's coefficient of variation was less than 10%. This detection system was approximately 107 times more sensitive than commercially available ELISA kits. Norovirus in clinical samples was detected over a wide concentration range of 1.0 × 101 - 1.0 × 106 RNA copy number/mL with a detection limit of 7.8 RNA copy number/mL, indicating sensitivity comparable to real-time PCR. These results suggest that this detection system is stable in a complex matrix and has the potential for detecting norovirus in clinical samples with a small Palmtop Raman spectrometer.
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Affiliation(s)
- Enoch Y Park
- Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya Suruga-Ku, Shizuoka, 422-8529, Japan.
- Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya Suruga-Ku, Shizuoka, 422-8529, Japan.
- Faculty of Agriculture, Shizuoka University, 836 Ohya Suruga-Ku, Shizuoka, 422-8529, Japan.
| | - Syuei Maehata
- Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya Suruga-Ku, Shizuoka, 422-8529, Japan
| | - Indra Memdi Khoris
- Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya Suruga-Ku, Shizuoka, 422-8529, Japan
- National Institute Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8565, Japan
| | - Ojodomo J Achadu
- School of Health and Life Sciences, & National Horizon Centre, Teesside University, Middlesbrough, TS1 3BA, UK
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Jiang Y, Sun L, Qiao N, Wang X, Zhu C, Xing M, Liu H, Zhou P, Zhou D. A quadrivalent norovirus vaccine based on a chimpanzee adenovirus vector induces potent immunity in mice. Virol Sin 2024; 39:675-684. [PMID: 38997087 PMCID: PMC11401472 DOI: 10.1016/j.virs.2024.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 07/08/2024] [Indexed: 07/14/2024] Open
Abstract
Norovirus (NoV) infection is a major cause of gastroenteritis worldwide. The virus poses great challenges in developing vaccines with broad immune protection due to its genetic and antigenic diversity. To date, there are no approved NoV vaccines for clinical use. Here, we aimed to develop a broad-acting quadrivalent NoV vaccine based on a chimpanzee adenovirus vector, AdC68, carrying the major capsid protein (VP1) of noroviral GI and GII genotypes. Compared to intramuscular (i.m.), intranasal (i.n.), or other prime-boost immunization regimens (i.m. + i.m., i.m. + i.n., i.n. + i.m.), AdC68-GI.1-GII.3 (E1)-GII.4-GII.17 (E3), administered via i.n. + i.n. induced higher titers of serum IgG antibodies and higher IgA antibodies in bronchoalveolar lavage fluid (BALF) and saliva against the four homologous VP1s in mice. It also significantly stimulated the production of blocking antibodies against the four genotypes. In response to re-stimulation with virus-like particles (VLP)-GI.1, VLP-GII.3, VLP-GII.4, and VLP-GII.17, the quadrivalent vaccine administered according to the i.n. + i.n. regimen effectively triggered specific cell-mediated immune responses, primarily characterized by IFN-γ secretion. Furthermore, the preparation of this novel quadrivalent NoV vaccine requires only a single recombinant adenovirus to provide broad preventive immunity against the major GI/GII epidemic strains, making it a promising vaccine candidate for further development.
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Affiliation(s)
- Yihua Jiang
- Department of Pathogen Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Lingjin Sun
- Department of Pathogen Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Nan Qiao
- Department of Pathogen Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Xiang Wang
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, 201508, China
| | - Caihong Zhu
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, 201508, China
| | - Man Xing
- Department of Pathogen Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China; Shanghai Public Health Clinical Center, Fudan University, Shanghai, 201508, China
| | - Hui Liu
- R&D Centre, Chengdu Kanghua Biological Products Co., Ltd, Chengdu, 610000, China.
| | - Ping Zhou
- Department of Pathogen Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China; Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China.
| | - Dongming Zhou
- Department of Pathogen Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China; Shanghai Public Health Clinical Center, Fudan University, Shanghai, 201508, China.
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Zhang P, Hao C, Di X, Chuizhao X, Jinsong L, Guisen Z, Hui L, Zhaojun D. Global prevalence of norovirus gastroenteritis after emergence of the GII.4 Sydney 2012 variant: a systematic review and meta-analysis. Front Public Health 2024; 12:1373322. [PMID: 38993708 PMCID: PMC11236571 DOI: 10.3389/fpubh.2024.1373322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 05/30/2024] [Indexed: 07/13/2024] Open
Abstract
Introduction Norovirus is widely recognized as a leading cause of both sporadic cases and outbreaks of acute gastroenteritis (AGE) across all age groups. The GII.4 Sydney 2012 variant has consistently prevailed since 2012, distinguishing itself from other variants that typically circulate for a period of 2-4 years. Objective This review aims to systematically summarize the prevalence of norovirus gastroenteritis following emergence of the GII.4 Sydney 2012 variant. Methods Data were collected from PubMed, Embase, Web of Science, and Cochrane databases spanning the period between January 2012 and August 2022. A meta-analysis was conducted to investigate the global prevalence and distribution patterns of norovirus gastroenteritis from 2012 to 2022. Results The global pooled prevalence of norovirus gastroenteritis was determined to be 19.04% (16.66-21.42%) based on a comprehensive analysis of 70 studies, which included a total of 85,798 sporadic cases with acute gastroenteritis and identified 15,089 positive cases for norovirus. The prevalence rate is higher in winter than other seasons, and there are great differences among countries and age groups. The pooled attack rate of norovirus infection is estimated to be 36.89% (95% CI, 36.24-37.55%), based on a sample of 6,992 individuals who tested positive for norovirus out of a total population of 17,958 individuals exposed during outbreak events. Conclusion The global prevalence of norovirus gastroenteritis is always high, necessitating an increased emphasis on prevention and control strategies with vaccine development for this infectious disease, particularly among the children under 5 years old and the geriatric population (individuals over 60 years old).
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Affiliation(s)
- Pan Zhang
- College of Public Health, Gansu University of Traditional Chinese Medicine, Lanzhou, Gansu, China
- National Key Laboratory of Intelligent Tracking and Forecasting for Infection Diseases, NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Cai Hao
- College of Public Health, Gansu University of Traditional Chinese Medicine, Lanzhou, Gansu, China
- National Key Laboratory of Intelligent Tracking and Forecasting for Infection Diseases, NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xie Di
- Chengdu Kanghua Biological Products Co., Ltd., Chengdu, China
| | - Xue Chuizhao
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), NHC Key Laboratory of Parasite and Vector Biology, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai, China
| | - Li Jinsong
- National Key Laboratory of Intelligent Tracking and Forecasting for Infection Diseases, NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Zheng Guisen
- College of Public Health, Gansu University of Traditional Chinese Medicine, Lanzhou, Gansu, China
| | - Liu Hui
- Chengdu Kanghua Biological Products Co., Ltd., Chengdu, China
| | - Duan Zhaojun
- National Key Laboratory of Intelligent Tracking and Forecasting for Infection Diseases, NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
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Summa M, Tuutti E, Al-Hello H, Huttunen LM, Rimhanen-Finne R. Norovirus GII.17 Caused Five Outbreaks Linked to Frozen Domestic Bilberries in Finland, 2019. FOOD AND ENVIRONMENTAL VIROLOGY 2024; 16:180-187. [PMID: 38466479 DOI: 10.1007/s12560-024-09587-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 01/26/2024] [Indexed: 03/13/2024]
Abstract
In March 2019, the Finnish Institute for Health and Welfare and Finnish Food Authority started an outbreak investigation after a notification of food business operators' recall of frozen bilberries due to a norovirus finding. A retrospective search was conducted in the food and waterborne outbreak notification system to identify the notifications linked to norovirus and consumption of bilberries in January-March 2019. Five outbreaks were found in which norovirus GII or GII.17 had been detected in patient samples. A pooled retrospective cohort study was performed for those four in which a questionnaire study had been done. A case was defined as a person with diarrhoea or vomiting within 2 days after consuming a meal studied at one of the outbreak locations. Of 79 participants, 45 (57%) cases were identified. Persons that had consumed foods containing unheated bilberries were three times more likely to get ill than those who had not consumed them (RR 3.1, CI 95% 1.2-8.1, p = 0.02). Norovirus GII.17 was found in 16/17 patient samples sent for further typing. Identical norovirus GII.17 was detected in frozen Finnish bilberries and patient samples. At the berry packaging premises, signs of norovirus GII contamination were found in packaging lines. A new procedure for extracting viral nucleic acid from food and environmental samples was used during the outbreak investigation. Consumption of industrially packed frozen berries as heated would be one of the means to prevent norovirus infections.
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Affiliation(s)
- Maija Summa
- Microbiology Unit, Laboratory and Research Division, Finnish Food Authority, Helsinki, Finland.
| | - Enni Tuutti
- Food Chain Division, Microbiological Food Safety Unit, Finnish Food Authority, Helsinki, Finland
| | - Haider Al-Hello
- Expert Microbiology Unit, Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Liisa-Maija Huttunen
- Infectious Disease Control and Vaccinations Unit, Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Ruska Rimhanen-Finne
- Infectious Disease Control and Vaccinations Unit, Finnish Institute for Health and Welfare, Helsinki, Finland
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9
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Sun Y, Yuan Y, Mao H, Su L, Ge Q, Gao J, Xu C, Gong L. Molecular Epidemiology of Human Norovirus Variants from Outbreaks in Zhejiang Province, China, during 2021. Adv Virol 2024; 2024:7972494. [PMID: 38846347 PMCID: PMC11156503 DOI: 10.1155/2024/7972494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 05/01/2024] [Accepted: 05/16/2024] [Indexed: 06/09/2024] Open
Abstract
Background Noroviruses are the most frequent cause of epidemic acute viral gastroenteritis in China. Objectives The aim of this study was to determine the molecular epidemiological characteristics of norovirus outbreaks and the molecular genetic features of norovirus in Zhejiang Province during 2021. Methods First, the local Centers for Disease Control and Prevention in the outbreak area conducted on-site epidemiologic investigations and collected samples from ill patients for initial testing. The general epidemiologic characteristics of the demographic information are presented through descriptive analysis. Positive samples were sent to the Microbiology Laboratory of Zhejiang Provincial Center for Disease Control and Prevention for further verification. The presence of norovirus genogroups I (GI) and II (GII), along with sapovirus, was detected. Subsequently, the specimens positive for norovirus were sequenced for genotyping purposes. Furthermore, the whole genomes of positive samples were sequenced, enabling the characterization of both nucleotide and amino acid differences within the virus. Finally, phylogenetic trees were constructed to further analyze and understand the genetic relationships among the detected viruses. Result 227 norovirus outbreaks were reported in Zhejiang Province, China, during 2021. Schools were the main setting while January was the peak month for outbreaks. A total of 17 diverse genotypes of norovirus were identified in 2021, and GII.P16-GII.2 was the most frequent genotype (30.19%). Seven genomes (five GI.P4-GI.5 and two GII.P16-GII.2) were obtained. Although GI.P4-GI.5 is considered to be a rare genotype of norovirus, the prevalence might have been underestimated. Capsid microvariation of GII.2 displayed histo-blood group antigen binding patterns compared to the GII.2 prototype, although VP1 sequences were considered to have a minimal impact on antigenicity. Conclusion This study revealed the diversity of norovirus strains' genotypes circulating in Zhejiang Province in 2021. Continued molecular surveillance of noroviruses should be strengthened in our further efforts to the development of vaccines.
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Affiliation(s)
- Yi Sun
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China
| | - Yongjuan Yuan
- Jia Shan Center for Disease Control and Prevention, Jiaxing, Zhejiang, China
| | - Haiyan Mao
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China
| | - Lingxuan Su
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China
| | - Qiong Ge
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China
| | - Jian Gao
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China
| | - Changping Xu
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China
| | - Liming Gong
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China
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10
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Kimura-Someya T, Katsura K, Kato-Murayama M, Hosaka T, Uchikubo-Kamo T, Ihara K, Hanada K, Sato S, Murayama K, Kataoka M, Shirouzu M, Someya Y. Structural analyses of the GI.4 norovirus by cryo-electron microscopy and X-ray crystallography revealing binding sites for human monoclonal antibodies. J Virol 2024; 98:e0019724. [PMID: 38593321 PMCID: PMC11092324 DOI: 10.1128/jvi.00197-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 03/21/2024] [Indexed: 04/11/2024] Open
Abstract
Noroviruses are major causative agents of acute nonbacterial gastroenteritis in humans. There are neither antiviral therapeutic agents nor vaccines for noroviruses at this time. To evaluate the potential usefulness of two previously isolated human monoclonal antibody fragments, CV-1A1 and CV-2F5, we first conducted a single-particle analysis to determine the cryo-electron microscopy structure of virus-like particles (VLPs) from the genogroup I genotype 4 (GI.4) Chiba strain uniformly coated with CV-1A1 fragments. The results revealed that the GI.4-specific CV-1A1 antibody bound to the P2 subdomain, in which amino acids are less conserved and variable. Interestingly, a part of the CV-1A1 intrudes into the histo-blood group antigen-binding site, suggesting that this antibody might exert neutralizing activity. Next, we determined the crystal structure of the protruding (P) domain of the capsid protein in the complex form with the CV-2F5 antibody fragment. Consistent with the cross-reactivity, the CV-2F5 bound to the P1 subdomain, which is rich in amino acids conserved among the GI strains, and moreover induced a disruption of Chiba VLPs. These results suggest that the broadly reactive CV-2F5 antibody can be used as both a universal detection reagent and an antiviral drug for GI noroviruses. IMPORTANCE We conducted the structural analyses of the VP1 protein from the GI.4 Chiba norovirus to identify the binding sites of the previously isolated human monoclonal antibodies CV-1A1 and CV-2F5. The cryo-electron microscopy of the Chiba virus-like particles (VLPs) complexed with the Fv-clasp forms of GI.4-specific CV-1A1 revealed that this antibody binds to the highly variable P2 subdomain, suggesting that this antibody may have neutralizing ability against the GI.4 strains. X-ray crystallography revealed that the CV-2F5 antibody bound to the P1 subdomain, which is rich in conserved amino acids. This result is consistent with the ability of the CV-2F5 antibody to react with a wide variety of GI norovirus strains. It is also found that the CV-2F5 antibody caused a disruption of VLPs. Our findings, together with previous reports on the structures of VP1 proteins and VLPs, are expected to open a path for the structure-based development of antivirals and vaccines against norovirus disease.
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Affiliation(s)
| | - Kazushige Katsura
- RIKEN Center for Biosystems Dynamics Research, Yokohama, Kanagawa, Japan
| | | | - Toshiaki Hosaka
- RIKEN Center for Biosystems Dynamics Research, Yokohama, Kanagawa, Japan
| | | | - Kentaro Ihara
- RIKEN Center for Biosystems Dynamics Research, Yokohama, Kanagawa, Japan
| | - Kazuharu Hanada
- RIKEN Center for Biosystems Dynamics Research, Yokohama, Kanagawa, Japan
| | - Shin Sato
- RIKEN Center for Biosystems Dynamics Research, Yokohama, Kanagawa, Japan
| | - Kazutaka Murayama
- RIKEN Center for Biosystems Dynamics Research, Yokohama, Kanagawa, Japan
- Graduate School of Biomedical Engineering, Tohoku University, Sendai, Miyagi, Japan
| | - Michiyo Kataoka
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Mikako Shirouzu
- RIKEN Center for Biosystems Dynamics Research, Yokohama, Kanagawa, Japan
| | - Yuichi Someya
- Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan
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11
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Tohma K, Landivar M, Ford-Siltz LA, Pilewski KA, Kendra JA, Niendorf S, Parra GI. Antigenic Characterization of Novel Human Norovirus GII.4 Variants San Francisco 2017 and Hong Kong 2019. Emerg Infect Dis 2024; 30:1026-1029. [PMID: 38666659 PMCID: PMC11060466 DOI: 10.3201/eid3005.231694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024] Open
Abstract
Norovirus is a major cause of acute gastroenteritis; GII.4 is the predominant strain in humans. Recently, 2 new GII.4 variants, Hong Kong 2019 and San Francisco 2017, were reported. Characterization using GII.4 monoclonal antibodies and serum demonstrated different antigenic profiles for the new variants compared with historical variants.
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12
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da Costa JN, Siqueira JAM, Teixeira DM, Lobo PDS, Guerra SDFDS, Souza IM, Cardoso BTM, Farias LSS, Resque HR, Gabbay YB, da Silva LD. Epidemiological and molecular surveillance of norovirus in the Brazilian Amazon: description of recombinant genotypes and improvement of evolutionary analysis. Rev Inst Med Trop Sao Paulo 2024; 66:e22. [PMID: 38656038 PMCID: PMC11027490 DOI: 10.1590/s1678-9946202466022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 01/12/2024] [Indexed: 04/26/2024] Open
Abstract
Noroviruses are highly infectious, genetically diverse viruses. Global outbreaks occur frequently, making molecular surveillance important for infection monitoring. This cross-sectional descriptive study aimed to monitor cases of norovirus gastroenteritis in the Brazilian Amazon. Fecal samples were tested by immunoenzymatic assay, RT-PCR and genetic sequencing for the ORF1/ORF2 and protease regions. Bayesian inference with a molecular clock was employed to construct the phylogeny. The norovirus prevalence was 25.8%, with a higher positivity rate among children aged 0-24 months. Genogroup GII accounted for 98.1% of the sequenced samples, while GI accounted for 1.9% of them. The GII.P16/GII.4 genotype was the most prevalent, with an evolution rate of 2.87x10-3 and TMRCA estimated in 2012. This study demonstrates that norovirus is a primary causative agent of gastroenteritis and provides data on viral genetic diversity that may facilitate infection surveillance and vaccine development.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Hugo Reis Resque
- Instituto Evandro Chagas, Seção de Virologia, Ananindeua, Pará, Brazil
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13
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Hong X, Xue L, Cao Y, Xu R, Wang J, Gao J, Miao S, Jiang Y, Kou X. The variation of antigenic and histo-blood group binding sites synergistically drive the evolution among chronologically emerging GII.4 noroviruses. Heliyon 2024; 10:e26567. [PMID: 38463890 PMCID: PMC10920170 DOI: 10.1016/j.heliyon.2024.e26567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 12/17/2023] [Accepted: 02/15/2024] [Indexed: 03/12/2024] Open
Abstract
Norovirus, commonly found on shellfish and vegetables, is a foodborne virus with GII.4 as the dominant genotype responsible for widespread outbreaks since 1995. Continuous variation of major capsid protein VP1 can lead to changes in the immunogenicity and host receptor binding ability of norovirus, which is an important evolutionary mechanism. Therefore, analyzing the immunogenicity of VP1 and its binding ability to various HBGAs in GII.4 variants could improve our understanding of the persistent prevalence of GII.4. Here, the results suggest that GII.4 has gradually enhanced its HBGAs binding ability over time for various types of receptors. Variants exhibit significantly stronger immune response to homologous mouse antiserum than heterologous ones, highlighting the importance of variation of antigenic and histo-blood group binding sites in driving the evolution of GII.4. These synergistic forces constantly lead to antigenic drift and changes in receptor binding, resulting in continuous emergence of new variant strains and sustained prevalence.
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Affiliation(s)
- Xiaojing Hong
- Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases, KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Science, China
| | - Liang Xue
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Science, China
| | - Yingwen Cao
- Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases, KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Ruiquan Xu
- Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases, KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Jingmin Wang
- Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases, KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Junshan Gao
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Science, China
| | - Shuidi Miao
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Science, China
| | - Yueting Jiang
- Department of Laboratory Medicine, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, China
| | - Xiaoxia Kou
- Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases, KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
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14
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Khamrin P, Kumthip K, Yodmeeklin A, Okitsu S, Motomura K, Sato S, Ushijima H, Maneekarn N. Genetic recombination and genotype diversity of norovirus GI in children with acute gastroenteritis in Thailand, 2015-2021. J Infect Public Health 2024; 17:379-385. [PMID: 38237357 DOI: 10.1016/j.jiph.2024.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 01/02/2024] [Accepted: 01/08/2024] [Indexed: 02/19/2024] Open
Abstract
BACKGROUND Human norovirus is a predominant etiological agent responsible for acute gastroenteritis across all age groups. Recently, norovirus recombinant strains have been reported as the cause of norovirus outbreaks in several settings and the strains that cause outbreaks mostly belong to the norovirus GII. However, yet, the norovirus GI recombinant strains have never been reported previously in Thailand. The aims of this study were to investigate the genetic recombination and genotype diversity of norovirus GI strains in children hospitalized with acute gastroenteritis in Chiang Mai, Thailand during a period of seven years from 2015 to 2021. METHODS A total of 2829 stool specimens were screened for norovirus GI by real-time PCR, and the polymerase and capsid genes were sequenced and analyzed. RESULTS Of 2829 specimens tested, 12 (0.4%) were positive for norovirus GI. Of these, 7 out of 12 (58.3%) strains were identified as norovirus GI recombinant strains. Among 7 norovirus GI recombinant strains, 3, 3, and 1 were identified as GI.3[P13], GI.5[P4], and GI.6[P11], respectively. The remaining five strains were identified as non-recombinant strains of the GI.4[P4], GI.5[P5], and GI.6[P6] genotypes. CONCLUSIONS The findings highlight the genetic diversity and multiple intergenotype recombinant strains of norovirus GI circulating in children with acute gastroenteritis in Chiang Mai, Thailand from 2015 to 2021. The detection of multiple intergenotype norovirus GI recombinant strains further underscore the complexity of norovirus GI strains circulating in this region.
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Affiliation(s)
- Pattara Khamrin
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Center of Excellence in Emerging and Re-emerging Diarrheal Viruses, Chiang Mai University, Chiang Mai, Thailand; Division of Microbiology, Department of Pathology and Microbiology, Nihon University School of Medicine, Tokyo, Japan
| | - Kattareeya Kumthip
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Center of Excellence in Emerging and Re-emerging Diarrheal Viruses, Chiang Mai University, Chiang Mai, Thailand
| | - Arpaporn Yodmeeklin
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Center of Excellence in Emerging and Re-emerging Diarrheal Viruses, Chiang Mai University, Chiang Mai, Thailand
| | - Shoko Okitsu
- Division of Microbiology, Department of Pathology and Microbiology, Nihon University School of Medicine, Tokyo, Japan
| | - Kazushi Motomura
- Epidemiology Section, Division of Public Health, Osaka Institute of Public Health, Osaka, Japan
| | - Shintaro Sato
- Department of Microbiology and Immunology, School of Pharmaceutical Sciences, Wakayama Medical University, Wakayama, Japan
| | - Hiroshi Ushijima
- Division of Microbiology, Department of Pathology and Microbiology, Nihon University School of Medicine, Tokyo, Japan
| | - Niwat Maneekarn
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Center of Excellence in Emerging and Re-emerging Diarrheal Viruses, Chiang Mai University, Chiang Mai, Thailand.
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15
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Rimkute I, Chaimongkol N, Woods KD, Nagata BM, Darko S, Gudbole S, Henry AR, Sosnovtsev SV, Olia AS, Verardi R, Bok K, Todd JP, Woodward R, Kwong PD, Douek DC, Alves DA, Green KY, Roederer M. A non-human primate model for human norovirus infection. Nat Microbiol 2024; 9:776-786. [PMID: 38321182 DOI: 10.1038/s41564-023-01585-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 12/12/2023] [Indexed: 02/08/2024]
Abstract
Norovirus infection can cause gastrointestinal disease in humans. Development of therapies and vaccines against norovirus have been limited by the lack of a suitable and reliable animal model. Here we established rhesus macaques as an animal model for human norovirus infection. We show that rhesus macaques are susceptible to oral infection with human noroviruses from two different genogroups. Variation in duration of virus shedding (days to weeks) between animals, evolution of the virus over the time of infection, induction of virus-specific adaptive immune responses, susceptibility to reinfection and preferential replication of norovirus in the jejunum of rhesus macaques was similar to infection reported in humans. We found minor pathological signs and changes in epithelial cell surface glycosylation patterns in the small intestine during infection. Detection of viral protein and RNA in intestinal biopsies confirmed the presence of the virus in chromogranin A-expressing epithelial cells, as it does in humans. Thus, rhesus macaques are a promising non-human primate model to evaluate vaccines and therapeutics against norovirus disease.
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Affiliation(s)
- Inga Rimkute
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Natthawan Chaimongkol
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Kamron D Woods
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Bianca M Nagata
- Comparative Medicine Branch, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Rockville, MD, USA
| | - Samuel Darko
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Sucheta Gudbole
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Amy R Henry
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Stanislav V Sosnovtsev
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Adam S Olia
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Raffaello Verardi
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Karin Bok
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - John-Paul Todd
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Ruth Woodward
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Peter D Kwong
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Daniel C Douek
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Derron A Alves
- Comparative Medicine Branch, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Rockville, MD, USA
| | - Kim Y Green
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Mario Roederer
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA.
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16
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Lo M, Doan YH, Mitra S, Saha R, Miyoshi SI, Kitahara K, Dutta S, Oka T, Chawla-Sarkar M. Comprehensive full genome analysis of norovirus strains from eastern India, 2017-2021. Gut Pathog 2024; 16:3. [PMID: 38238807 PMCID: PMC10797879 DOI: 10.1186/s13099-023-00594-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 12/20/2023] [Indexed: 01/22/2024] Open
Abstract
BACKGROUND Worldwide, noroviruses are the leading cause of acute gastroenteritis (AGE) in people of all age groups. In India, norovirus rates between 1.4 to 44.4% have been reported. Only a very few complete norovirus genome sequences from India have been reported. OBJECTIVE To perform full genome sequencing of noroviruses circulating in India during 2017-2021, identify circulating genotypes, assess evolution including detection of recombination events. METHODOLOGY Forty-five archived norovirus-positive samples collected between October 2017 to July 2021 from patients with AGE from two hospitals in Kolkata, India were processed for full genome sequencing. Phylogenetic analysis, recombination breakpoint analysis and comprehensive mutation analysis were also performed. RESULTS Full genome analysis of norovirus sequences revealed that strains belonging to genogroup (G)I were genotyped as GI.3[P13]. Among the different norovirus capsid-polymerase combinations, GII.3[P16], GII.4 Sydney[P16], GII.4 Sydney[P31], GII.13[P16], GII.16[P16] and GII.17 were identified. Phylogenetic analysis confirmed phylogenetic relatedness with previously reported norovirus strains and all viruses were analyzed by Simplot. GII[P16] viruses with multiple residue mutations within the non-structural region were detected among circulating GII.4 and GII.3 strains. Comprehensive mutation analysis and selection pressure analysis of GII[P16] viruses showed positive as well as negative selection sites. A GII.17 strain (NICED-BCH-11889) had an untypeable polymerase type, closely related to GII[P38]. CONCLUSION This study highlights the circulation of diverse norovirus strains in eastern India. These findings are important for understanding norovirus epidemiology in India and may have implications for future vaccine development.
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Affiliation(s)
- Mahadeb Lo
- Division of Virology, ICMR-National Institute of Cholera and Enteric Diseases, P-33, C.I.T. Rd, Scheme-XM, Beliaghata, Kolkata, 700010, West Bengal, India
| | - Yen Hai Doan
- Center for Emergency Preparedness and Response, National Institute of Infectious Diseases, Gakuen 4-7-1, Musashi-Murayama, Tokyo, Japan
| | - Suvrotoa Mitra
- Division of Virology, ICMR-National Institute of Cholera and Enteric Diseases, P-33, C.I.T. Rd, Scheme-XM, Beliaghata, Kolkata, 700010, West Bengal, India
| | - Ritubrita Saha
- Division of Virology, ICMR-National Institute of Cholera and Enteric Diseases, P-33, C.I.T. Rd, Scheme-XM, Beliaghata, Kolkata, 700010, West Bengal, India
| | - Shin-Ichi Miyoshi
- Collaborative Research Center of Okayama University for Infectious Diseases in India, ICMR-National Institute of Cholera and Enteric Diseases, Kolkata, India
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Kei Kitahara
- Collaborative Research Center of Okayama University for Infectious Diseases in India, ICMR-National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - Shanta Dutta
- Regional Virus Research and Diagnostic Laboratory, ICMR-National Institute of Cholera and Enteric Diseases, Beliaghata, Kolkata, West Bengal, India
| | - Tomoichiro Oka
- Department of Virology II, National Institute of Infectious Diseases, Gakuen 4-7-1, Musashi-Murayama, Tokyo, Japan.
| | - Mamta Chawla-Sarkar
- Division of Virology, ICMR-National Institute of Cholera and Enteric Diseases, P-33, C.I.T. Rd, Scheme-XM, Beliaghata, Kolkata, 700010, West Bengal, India.
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17
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Chuchaona W, Vongpunsawad S, Lawtongkum W, Thepnarong N, Poovorawan Y. Acute Gastroenteritis Associated with Norovirus GII.8[P8], Thailand, 2023. Emerg Infect Dis 2024; 30:194-197. [PMID: 38147526 PMCID: PMC10756372 DOI: 10.3201/eid3001.231264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023] Open
Abstract
Acute gastroenteritis associated with human norovirus infection was reported in Phuket, Thailand, in June 2023. We amplified GII.8[P8] from the outbreak stool specimens. Retrospective sample analysis identified infrequent GII.8[P8] in the country beginning in 2018. In all, the 10 whole-genome GII.8[P8] sequences from Thailand we examined had no evidence of genotypic recombination.
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18
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Chaimongkol N, Dábilla N, Tohma K, Matsushima Y, Yardley AB, Levenson EA, Johnson JA, Ahorrio C, Oler AJ, Kim DY, Souza M, Sosnovtsev SV, Parra GI, Green KY. Norovirus evolves as one or more distinct clonal populations in immunocompromised hosts. mBio 2023; 14:e0217723. [PMID: 37905910 PMCID: PMC10746188 DOI: 10.1128/mbio.02177-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 08/30/2023] [Indexed: 11/02/2023] Open
Abstract
IMPORTANCE Noroviruses are an important cause of chronic diarrhea in patients with compromised immune systems. Presently, there are no effective therapies to clear the virus, which can persist for years in the intestinal tract. The goal of our study was to develop a better understanding of the norovirus strains that are associated with these long-term infections. With the remarkable diversity of norovirus strains detected in the immunocompromised patient cohort we studied, it appears that most, if not all, noroviruses circulating in nature may have the capacity to establish a chronic infection when a person is unable to mount an effective immune response. Our work is the most comprehensive genetic data set generated to date in which near full-length genomes from noroviruses associated with chronic infection were analyzed by high-resolution next-generation sequencing. Analysis of this data set led to our discovery that certain patients in our cohort were shedding noroviruses that could be subdivided into distinct haplotypes or populations of viruses that were co-evolving independently. The ability to track haplotypes of noroviruses during chronic infection will allow us to fine-tune our understanding of how the virus adapts and maintains itself in the human host, and how selective pressures such as antiviral drugs can affect these distinct populations.
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Affiliation(s)
- Natthawan Chaimongkol
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Nathânia Dábilla
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
- Laboratory of Virology and Cell Culture, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Kentaro Tohma
- Division of Viral Products, Food and Drug Administration, Silver Spring, Maryland, USA
| | - Yuki Matsushima
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Allison Behrle Yardley
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Eric A. Levenson
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Jordan A. Johnson
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Courtney Ahorrio
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Andrew J. Oler
- Bioinformatics and Computational Biosciences Branch, Office of Cyber Infrastructure and Computational Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Daniel Y. Kim
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Menira Souza
- Laboratory of Virology and Cell Culture, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Stanislav V. Sosnovtsev
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Gabriel I. Parra
- Division of Viral Products, Food and Drug Administration, Silver Spring, Maryland, USA
| | - Kim Y. Green
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
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19
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Sá R, Roque J, Marques Mendes P, Gonçalves I, Sousa J, Matos C, Júnior Á, Coelho A, Belo Correia C, Manageiro V, Minetti C, de Sousa R, Horta Correia F. Prevention, protocols, and lab capacity: lessons from a norovirus outbreak in the Algarve. Arch Virol 2023; 168:299. [PMID: 38015274 DOI: 10.1007/s00705-023-05926-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 10/16/2023] [Indexed: 11/29/2023]
Abstract
This brief report presents the findings of an epidemiological investigation into a large-scale outbreak of norovirus gastroenteritis that occurred in a hotel in Algarve, Portugal, in August 2022. A total of 244 cases were reported, primarily affecting Portuguese families, with the parents aged 40-50 years and the children aged 0-19 years. Reported symptoms included vomiting, nausea, abdominal pain, and diarrhoea. Norovirus genotype GI.3 [P3] was detected in stool samples from eight probable cases, while food samples tested negative for norovirus and common pathogenic bacteria. The investigation data collected suggest that the source of the outbreak was likely in the hotel's common areas, with subsequent person-to-person transmission in other areas. The final report emphasizes the importance of improving outbreak prevention and control measures, including the development of a foodborne outbreak investigation protocol, the establishment of an outbreak response team, and the enhancement of regional laboratory capacity.
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Affiliation(s)
- Regina Sá
- Public Health Unit, Algarve Central Health Centre Grouping, Regional Health Administration of Algarve, Faro, Portugal.
| | - Joana Roque
- Public Health Unit, Algarve Central Health Centre Grouping, Regional Health Administration of Algarve, Faro, Portugal
| | - Pedro Marques Mendes
- Public Health Unit, Algarve Central Health Centre Grouping, Regional Health Administration of Algarve, Faro, Portugal
| | - Inês Gonçalves
- Public Health Unit, Algarve Barlavento Health Centre Grouping, Regional Health Administration of Algarve, Portimão, Portugal
| | - Judite Sousa
- Personalized Health Care Unit (UCSP) Albufeira, Algarve Central Health Centre Grouping, Regional Health Administration of Algarve, Albufeira, Portugal
| | - Cátia Matos
- Personalized Health Care Unit (UCSP) Albufeira, Algarve Central Health Centre Grouping, Regional Health Administration of Algarve, Albufeira, Portugal
| | | | - Anabela Coelho
- Department of Food and Nutrition, National Institute of Health Doutor Ricardo Jorge, Lisbon, Portugal
| | - Cristina Belo Correia
- Department of Food and Nutrition, National Institute of Health Doutor Ricardo Jorge, Lisbon, Portugal
| | - Vera Manageiro
- Department of Infectious Diseases, National Institute of Health Doutor Ricardo Jorge, Lisbon, Portugal
- European Public Health Microbiology Training Programme (EUPHEM), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Corrado Minetti
- Department of Infectious Diseases, National Institute of Health Doutor Ricardo Jorge, Lisbon, Portugal
- European Public Health Microbiology Training Programme (EUPHEM), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Rita de Sousa
- Department of Infectious Diseases, National Institute of Health Doutor Ricardo Jorge, Lisbon, Portugal
| | - Filomena Horta Correia
- Public Health Unit, Algarve Central Health Centre Grouping, Regional Health Administration of Algarve, Faro, Portugal
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20
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Widström J, Andersson ME, Westin J, Wahllöf M, Lindh M, Rydell GE. Complex norovirus transmission dynamics at hospital wards revealed by deep sequencing. J Clin Microbiol 2023; 61:e0060823. [PMID: 37889018 PMCID: PMC10662361 DOI: 10.1128/jcm.00608-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 09/05/2023] [Indexed: 10/28/2023] Open
Abstract
Detailed knowledge regarding norovirus transmission within hospitals is limited. We investigated a norovirus hospital outbreak affecting 65 patients at five different wards. PCR showed that 61 (94%) of the patients were infected with genotype II.4 strains. Successful Ion Torrent deep sequencing of GII.4 positive samples from 59 patients followed by phylogenetic analysis revealed that all sequences but two clustered into four distinct clades. Two of the clades belonged to GII.4 Sydney 2012, while the other two belonged to GII.4 New Orleans 2009. One of the clades was predominant at two wards, while two clades were predominant at one ward each. The fourth clade was found in sporadic cases at several wards. Thus, at four out of five wards, variants from one clade were predominant. At one ward, a single clade accounted for all cases, while at three wards the predominant clade accounted for 60%-71% of cases. Analysis of quasispecies variation identified positions that could further discriminate between variants from separate wards. The results illustrate a complex transmission of healthcare-associated norovirus infections and show that sequencing can be used to discriminate between related and unrelated cases.
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Affiliation(s)
- Julia Widström
- Department of Infectious Diseases, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Maria E. Andersson
- Department of Infectious Diseases, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Johan Westin
- Department of Infectious Diseases, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Martina Wahllöf
- Department of Infectious Diseases, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Magnus Lindh
- Department of Infectious Diseases, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Gustaf E. Rydell
- Department of Infectious Diseases, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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21
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Chen Q, Ma J, Gao L, Xian R, Wei K, Shi A, Yuan F, Cao M, Zhao Y, Jin M, Kuai W. Determination and analysis of whole genome sequence of recombinant GII.6[P7] norovirus in Ningxia, China. INFECTION, GENETICS AND EVOLUTION : JOURNAL OF MOLECULAR EPIDEMIOLOGY AND EVOLUTIONARY GENETICS IN INFECTIOUS DISEASES 2023; 115:105499. [PMID: 37734510 DOI: 10.1016/j.meegid.2023.105499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/31/2023] [Accepted: 09/05/2023] [Indexed: 09/23/2023]
Abstract
While the GII.4 norovirus was the predominant genotype, non-GII.4 genotype was increasingly focused since the non-GII.4 genotype caused regional epidemics. In this study, the detection rate was16.51% (183/1108) in Ningxia from January to December 2020. Among identified genotypes, GII.4[P31] and GII.4[P16] were the dominant genotypes (n = 20 and 18, respectively) while GII.6[P7] was the main type (n = 6) in non-GII.4 strains which was mainly detected in from May to July. The whole genome sequences of the norovirus diarrhea samples identified as GII.6 [P7] with Ct ≤ 30 collected in 2020 were determined. In this study, the complete genome sequences of norovirus strains PL20-044 and QTX20-071 were identified and analyzed phylogenetically. Phylogenetic analysis of the ORF1and ORF2 regions showed that these strains evolved from the GII·P7-GII.6 strains detected in recent years from different country. The results showed that PL20-044 had intra-type recombination with GII·P7-GII.6c and GII·P7-GII.6a, while QTX20-071 had intre-type recombination within GII·P7-GII.6a. The evolutionary rates of the RdRp gene region of the GII·P7 genotype and the VP1 gene region of the GII.6 genotype were 2.91 × 10-3 (95%HPDs2.32-3.51 × 10-3) and 2.61 × 10-3 (95%HPDs2.14-3.11 × 10-3) substitutions/site/year, respectively. Comparative analysis of the amino acid mutation sites in VP1 with the GII·P7-GII.6a strains before 1997, the later detected strains have changed in aa131 and aa354. Moreover, PL20-044 strains showed special mutations at aa316 and aa395. These results help to understand the norovirus genotype circulating in the human population in Ningxia, and discover the evolutionary characteristics of the GII·P7-GII.6 strain.
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Affiliation(s)
- Qian Chen
- Ningxia Center for Disease Prevention and Control, Yinchuan 750004, China; School of Public Health, Ningxia Medical University, Yinchuan 750001, China
| | - Jiangtao Ma
- Ningxia Center for Disease Prevention and Control, Yinchuan 750004, China.
| | - Lei Gao
- Ningxia Center for Disease Prevention and Control, Yinchuan 750004, China; School of Public Health, Ningxia Medical University, Yinchuan 750001, China
| | - Ran Xian
- Ningxia Center for Disease Prevention and Control, Yinchuan 750004, China; School of Public Health, Ningxia Medical University, Yinchuan 750001, China
| | - Kaixin Wei
- Ningxia Center for Disease Prevention and Control, Yinchuan 750004, China; School of Public Health, Ningxia Medical University, Yinchuan 750001, China
| | - Anqi Shi
- Ningxia Center for Disease Prevention and Control, Yinchuan 750004, China; School of Public Health, Ningxia Medical University, Yinchuan 750001, China
| | - Fang Yuan
- Ningxia Center for Disease Prevention and Control, Yinchuan 750004, China
| | - Min Cao
- Ningxia Center for Disease Prevention and Control, Yinchuan 750004, China
| | - Yu Zhao
- School of Public Health, Ningxia Medical University, Yinchuan 750001, China
| | - Miao Jin
- National Institute for Viral Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102211, China
| | - Wenhe Kuai
- Ningxia Center for Disease Prevention and Control, Yinchuan 750004, China
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22
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Lu L, Ao Y, Jia R, Zhong H, Liu P, Xu M, Su L, Cao L, Xu J. Changing predominance of norovirus strains in children with acute gastroenteritis in Shanghai, 2018-2021. Virol Sin 2023; 38:671-679. [PMID: 37619918 PMCID: PMC10590699 DOI: 10.1016/j.virs.2023.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 08/17/2023] [Indexed: 08/26/2023] Open
Abstract
Norovirus (NoV) is a major pathogen that causes acute gastroenteritis (AGE) in people of all ages, especially in children. In this study, we investigated the molecular epidemiological characteristics of NoV in children with AGE in Shanghai from 2018 to 2021. The overall detection rate of NoV was 11.9% (181/1545), with annual detection rates of 9.4% (36/381), 13.6% (29/213), 5.8% (13/226) and 14.2% (103/725), respectively. Of note, the prevalence of NoV in 2020 was significantly lower than that in 2018-2019 (10.9%, 65/594) (P = 0.023) and 2021 (14.2%, 103/725) (P = 0.000). The 181 NoV strains identified in this study were classified into the GI group (1.1%, 2/181), GII group (98.3%, 178/181) and GIX group (0.6%, 1/181) according to the VP1 gene. The most common NoV VP1 genotype was GII.4 Sydney_2012 (63.5%, 115/181), followed by GII.3 (19.9%, 36/181) and GII.2 (9.4%, 17/181). For P genotypes, 174 strains were sequenced successfully according to the RdRp gene, and the predominant genotype was GII.P16 (44.8%, 78/174), followed by GII.P31 (25.9%, 45/174) and GII.P12 (21.3%, 37/174). Among the 174 cases, GII.4 Sydney_2012[P16] (36.8%, 64/174) was the dominant genotype, followed by GII.4 Sydney_2012[P31] (25.3%, 44/174), GII.3[P12] (20.1%, 35/174) and GII.2[P16] (8.0%, 14/174). In particular, the dominant genotypes in Shanghai changed from GII.4 Sydney_2012[P31] in 2018-2019 to GII.4 Sydney_2012[P16] in 2020-2021. This is the first report to describe the epidemiological changes in NoV infection before and during the COVID-19 pandemic in Shanghai. These data highlight the importance of continuous surveillance for NoV in children with AGE in Shanghai.
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Affiliation(s)
- Lijuan Lu
- Department of Clinical Laboratory, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, 201100, China
| | - Yuanyun Ao
- Department of Clinical Laboratory, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, 201100, China
| | - Ran Jia
- Department of Clinical Laboratory, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, 201100, China
| | - Huaqing Zhong
- Department of Clinical Laboratory, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, 201100, China
| | - Pengcheng Liu
- Department of Clinical Laboratory, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, 201100, China
| | - Menghua Xu
- Department of Clinical Laboratory, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, 201100, China
| | - Liyun Su
- Department of Clinical Laboratory, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, 201100, China
| | - Lingfeng Cao
- Department of Clinical Laboratory, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, 201100, China
| | - Jin Xu
- Department of Clinical Laboratory, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, 201100, China; Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, 201100, China.
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23
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Shapiro JR, Andreani G, Dubé C, Berubé M, Bussière D, Couture MMJ, Dargis M, Hendin HE, Landry N, Lavoie PO, Pillet S, Ward BJ, D'Aoust MA, Trépanier S. Development and characterization of a plant-derived norovirus-like particle vaccine. Vaccine 2023; 41:6008-6016. [PMID: 37625992 DOI: 10.1016/j.vaccine.2023.08.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 07/13/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023]
Abstract
BACKGROUND Norovirus (NoV) is the most common cause of diarrheal episodes globally. Issues with in vitro cultivation systems, genetic variation, and animal models have hindered vaccine development. Plant-derived virus-like particles (VLPs) may address some of these concerns because they are highly immunogenic, can be administered by different routes, and can be rapidly produced to accommodate emerging viral strains. METHODS NoV VLPs (NoVLP) composed of the surface viral protein (VP) 1 of the GI and GII genogroups were produced in Nicotiana benthamiana using an Agrobacterium tumefaciens-based recombinant transient expression system. Leaves from infiltrated plants were harvested and NoVLPs were extracted and purified. The safety and immunogenicity of the GII.4 NoVLP, the genotype currently causing most human disease, were subsequently examined in rabbits and mice. RESULTS Fifteen GI and GII NoVLPs were successfully expressed in N. benthamiana and were structurally similar to NoV virions, as determined by cryogenic transmission electron microscopy. The NoVLP was well-tolerated, with no local or systemic signs of toxicity in rabbits. Three intramuscular doses of the GII.4 NoVLP adjuvanted with aluminum hydroxide induced robust IgG titers, IgG-secreting cells, histo-blood group antigen blocking titers, and IFNγ-secreting T cells in mice. In addition to circulating antibodies, oral administration of the NoVLP in mice induced significant IgA levels in feces, indicative of a mucosal response. CONCLUSIONS The plant-made NoVLP vaccine was safe and immunogenic in mice and rabbits. Multi-modal vaccination, combining oral and intramuscular administration could be considered for future clinical development to maximize systemic and mucosal immune responses.
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Affiliation(s)
- Janna R Shapiro
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | | | - Charlotte Dubé
- Medicago Inc., 2552 boul. du Parc-Technologique, Québec, QC, Canada
| | - Mélanie Berubé
- Medicago Inc., 2552 boul. du Parc-Technologique, Québec, QC, Canada
| | - Diane Bussière
- Medicago Inc., 2552 boul. du Parc-Technologique, Québec, QC, Canada
| | | | - Michèle Dargis
- Medicago Inc., 2552 boul. du Parc-Technologique, Québec, QC, Canada
| | - Hilary E Hendin
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Nathalie Landry
- Medicago Inc., 2552 boul. du Parc-Technologique, Québec, QC, Canada
| | | | - Stéphane Pillet
- Medicago Inc., 2552 boul. du Parc-Technologique, Québec, QC, Canada
| | - Brian J Ward
- Medicago Inc., 2552 boul. du Parc-Technologique, Québec, QC, Canada
| | | | - Sonia Trépanier
- Medicago Inc., 2552 boul. du Parc-Technologique, Québec, QC, Canada.
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24
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Waerlop G, Janssens Y, Jacobs B, Jarczowski F, Diessner A, Leroux-Roels G, Klimyuk V, Leroux-Roels I, Thieme F. Immune responses in healthy adults elicited by a bivalent norovirus vaccine candidate composed of GI.4 and GII.4 VLPs without adjuvant. Front Immunol 2023; 14:1188431. [PMID: 37435073 PMCID: PMC10331465 DOI: 10.3389/fimmu.2023.1188431] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 06/01/2023] [Indexed: 07/13/2023] Open
Abstract
The development of an efficacious vaccine against norovirus is of paramount importance given its potential to reduce the global burden of norovirus-associated morbidity and mortality. Here, we report a detailed immunological analysis of a phase I, double-blind, placebo-controlled clinical trial performed on 60 healthy adults, ages 18 to 40. Total serum immunoglobulin and serum IgA against vaccine strains and cross-reactive serum IgG against non-vaccine strains were measured by enzyme immunoassays, whereas cell-mediated immune responses were quantified using intracellular cytokine staining by flow cytometry. A significant increase in humoral and cellular responses, e.g., IgA and CD4+ polypositive T cells, was triggered by the GI.4 Chiba 407 (1987) and GII.4 Aomori 2 (2006) VLP-based norovirus vaccine candidate rNV-2v, which is formulated without adjuvant. No booster effect was observed after the second administration in the pre-exposed adult study population. Furthermore, a cross-reactive immune response was elicited, as shown by IgG titers against GI.3 (2002), GII.2 OC08154 (2008), GII.4 (1999), GII.4 Sydney (2012), GII.4 Washington (2018), GII.6 Maryland (2018), and GII.17 Kawasaki 308 (2015). Due to viral infection via mucosal gut tissue and the high variety of potentially relevant norovirus strains, a focus should be on IgA and cross-protective humoral and cell-mediated responses in the development of a broadly protective, multi-valent norovirus vaccine. Clinical trial registration https://clinicaltrials.gov, identifier NCT05508178. EudraCT number: 2019-003226-25.
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Affiliation(s)
- Gwenn Waerlop
- Center for Vaccinology (CEVAC), Ghent University and University Hospital, Ghent, Belgium
| | - Yorick Janssens
- Center for Vaccinology (CEVAC), Ghent University and University Hospital, Ghent, Belgium
| | - Bart Jacobs
- Center for Vaccinology (CEVAC), Ghent University and University Hospital, Ghent, Belgium
| | | | | | - Geert Leroux-Roels
- Center for Vaccinology (CEVAC), Ghent University and University Hospital, Ghent, Belgium
| | | | - Isabel Leroux-Roels
- Center for Vaccinology (CEVAC), Ghent University and University Hospital, Ghent, Belgium
| | - Frank Thieme
- Icon Genetics GmbH, a Denka Company, Halle, Germany
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25
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Chuchaona W, Khongwichit S, Luang-On W, Vongpunsawad S, Poovorawan Y. Norovirus GII.3[P25] in Patients and Produce, Chanthaburi Province, Thailand, 2022. Emerg Infect Dis 2023; 29:1067-1070. [PMID: 37081605 PMCID: PMC10124668 DOI: 10.3201/eid2905.221291] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023] Open
Abstract
An increase in acute gastroenteritis occurred in Chanthaburi Province, Thailand, during December 2021‒January 2022. Of the norovirus genotypes we identified in hospitalized patients and produce from local markets, genotype GII.3[P25] accounted for one third. We found no traceable link between patients and produce but found evidence of potential viral intake.
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26
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de Oliveira Matos A, Vilela Rodrigues TC, Tiwari S, Dos Santos Dantas PH, Sartori GR, de Carvalho Azevedo VA, Martins Da Silva JH, de Castro Soares S, Silva-Sales M, Sales-Campos H. Immunoinformatics-guided design of a multi-valent vaccine against Rotavirus and Norovirus (ChRNV22). Comput Biol Med 2023; 159:106941. [PMID: 37105111 DOI: 10.1016/j.compbiomed.2023.106941] [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: 12/02/2022] [Revised: 03/17/2023] [Accepted: 04/14/2023] [Indexed: 04/29/2023]
Abstract
Rotavirus (RV) and Norovirus (NV) are the main viral etiologic agents of acute gastroenteritis (AG), a serious pediatric condition associated with significant death rates and long-term complications. Anti-RV vaccination has been proved efficient in the reduction of severe AG worldwide, however, the available vaccines are all attenuated and have suboptimal efficiencies in developing countries, where AG leads to substantial disease burden. On the other hand, no NV vaccine has been licensed so far. Therefore, we used immunoinformatics tools to develop a multi-epitope vaccine (ChRNV22) to prevent severe AG by RV and NV. Epitopes were predicted against 17 prevalent genotypes of four structural proteins (NV's VP1, RV's VP4, VP6 and VP7), and then assembled in a chimeric protein, with two small adjuvant sequences (tetanus toxin P2 epitope and a conserved sequence of RV's enterotoxin, NSP4). Simulations of the immune response and interactions with immune receptors indicated the immunogenic properties of ChRNV22, including a Th1-biased response. In silico search for putative host-homologous, allergenic and toxic regions also indicated the vaccine safety. In summary, we developed a multi-epitope vaccine against different NV and RV genotypes that seems promising for the prevention of severe AG, which will be further assessed by in vivo tests.
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Affiliation(s)
- Amanda de Oliveira Matos
- Laboratory of Mucosal Immunology and Immunoinformatics (LIM), Institute of Tropical Pathology and Public Health, Federal University of Goiás (UFG), Goiânia, 746050-050, Brazil
| | - Thaís Cristina Vilela Rodrigues
- Laboratory of Cellular and Molecular Genetics (LGCM), Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Belo Horizonte, 31270-901, Brazil
| | - Sandeep Tiwari
- Institute of Biology, Federal University of Bahia (UFBA), Salvador, 40170-115, Brazil; Institute of Health Sciences, Federal University of Bahia (UFBA), Salvador, 40231-300, Brazil
| | - Pedro Henrique Dos Santos Dantas
- Laboratory of Mucosal Immunology and Immunoinformatics (LIM), Institute of Tropical Pathology and Public Health, Federal University of Goiás (UFG), Goiânia, 746050-050, Brazil
| | | | - Vasco Ariston de Carvalho Azevedo
- Laboratory of Cellular and Molecular Genetics (LGCM), Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Belo Horizonte, 31270-901, Brazil
| | | | - Siomar de Castro Soares
- Department of Immunology, Microbiology, Immunology and Parasitology, Institute of Biological and Natural Sciences, Federal University of Triângulo Mineiro (UFTM), Uberaba, 38025-180, Brazil
| | - Marcelle Silva-Sales
- Laboratory of Virology and Cellular Culture (LABVICC), Institute of Tropical Pathology and Public Health, Federal University of Goiás (UFG), Goiânia, 746050-050, Brazil
| | - Helioswilton Sales-Campos
- Laboratory of Mucosal Immunology and Immunoinformatics (LIM), Institute of Tropical Pathology and Public Health, Federal University of Goiás (UFG), Goiânia, 746050-050, Brazil.
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27
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Doan YH, Yamashita Y, Shinomiya H, Motoya T, Sakon N, Suzuki R, Shimizu H, Shigemoto N, Harada S, Yahiro S, Tomioka K, Sakagami A, Ueki Y, Komagome R, Saka K, Okamoto-Nakagawa R, Shirabe K, Mizukoshi F, Arita Y, Haga K, Katayama K, Kimura H, Muramatsu M, Oka T. Distribution of Human Sapovirus Strain Genotypes over the last four Decades in Japan: a Global Perspective. Jpn J Infect Dis 2023. [PMID: 37005271 DOI: 10.7883/yoken.jjid.2022.704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
Sapovirus (SaV) infections are a public health problem because they cause acute gastroenteritis in humans of all ages both as outbreaks and in sporadic cases. However, publicly-available SaV sequence information, especially whole genome sequences for all the SaV genotypes, is still limited. Therefore, in this study, we determined the full/near-full-length genomic sequences of 138 SaVs from the 2001-2015 seasons in 13 prefectures across Japan. The GI genogroup was predominant (67%, n = 92), followed by GII (18%, n = 25), GIV (9%, n = 12), and GV (6%, n = 9). Within the GI genogroup, four different genotypes were identified, as follows: GI.1 (n=44), GI.2 (n=40), GI.3 (n=7), and GI.5 (n=1). We then compared these Japanese SaV sequences with a total of 3119 public human SaV sequences from 49 countries over the last 46 years. The results indicated that GI.1 and GI.2 have been the predominant genotypes in Japan as well as in other countries over at least four decades. Together with public SaV sequences, the 138 newly determined Japanese SaV sequences could facilitate a better understanding of the evolutionary patterns of SaV genotypes.
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Affiliation(s)
- Yen Hai Doan
- Center for Emergency Preparedness and Response, National Institute of Infectious Diseases, Japan
| | - Yasutaka Yamashita
- Department of Microbiology, Ehime Prefectural Institute of Public Health and Environmental Science, Japan
| | - Hiroto Shinomiya
- Department of Microbiology, Ehime Prefectural Institute of Public Health and Environmental Science, Japan
| | - Takumi Motoya
- Division of Virology, Ibaraki Prefectural Institute of Public Health, Japan
| | - Naomi Sakon
- Department of Microbiology, Virology Section, Osaka Prefectural Institute of Public Health, Japan
| | - Rieko Suzuki
- Department of Microbiology, Kanagawa Prefectural Institute of Public Health, Japan
| | - Hideaki Shimizu
- Division of Virology, Kawasaki City Institute for Public Health, Japan
| | - Naoki Shigemoto
- Public Health Research Division, Hiroshima Prefectural Technology Research Institute, Public Health and Environment Center, Japan
| | - Seiya Harada
- Department of Microbiology, Kumamoto Prefectural Institute of Public Health and Environmental Science, Japan
| | - Shunsuke Yahiro
- Department of Microbiology, Kumamoto Prefectural Institute of Public Health and Environmental Science, Japan
| | - Kyoko Tomioka
- Virus Group, Saitama Prefectural Institute of Public Health, Japan
| | - Akie Sakagami
- Department of Microbiology, Miyagi Prefectural Institute of Public Health and Environment, Japan
| | - Yo Ueki
- Department of Microbiology, Miyagi Prefectural Institute of Public Health and Environment, Japan
| | - Rika Komagome
- Division of Virology, Department of Infectious Diseases, Hokkaido Institute of Public Health, Japan
| | - Kyohei Saka
- Microbiology Department, Aomori Prefectural Public Health and Environment Center, Japan
| | - Reiko Okamoto-Nakagawa
- Division of Virology, Yamaguchi Prefectural Institute of Public Health and Environment, Japan
| | - Komei Shirabe
- Division of Virology, Yamaguchi Prefectural Institute of Public Health and Environment, Japan
| | - Fuminori Mizukoshi
- Department of Microbiology, Tochigi Prefectural Institute of Public Health and Environmental Science, Japan
| | - Yono Arita
- Department of Microbiology, Shizuoka Institute of Environment and Hygiene, Japan
| | - Kei Haga
- Laboratory of Viral Infection, Department of Infection Control and Immunology,Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Japan
| | - Kazuhiko Katayama
- Laboratory of Viral Infection, Department of Infection Control and Immunology,Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Japan
| | - Hirokazu Kimura
- Department of Health Science, Graduate School of Health Science, Gunma Paz University, Japan
| | | | - Tomoichiro Oka
- Department of Virology II, National Institute of Infectious Diseases, Japan
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Dinu S, Oprea M, Iordache RI, Rusu LC, Usein CR. Genome characterisation of norovirus GII.P17-GII.17 detected during a large gastroenteritis outbreak in Romania in 2021. Arch Virol 2023; 168:116. [PMID: 36947248 DOI: 10.1007/s00705-023-05741-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 02/21/2023] [Indexed: 03/23/2023]
Abstract
Norovirus (NoV) is one of the leading causes of acute gastroenteritis worldwide. Genotype GII.P17-G.II.17 emerged in Asia between 2013 and 2015 and transiently replaced the GII.4 Sydney 2012 variant circulating at that time. We present the genome characterisation of a GII.P17-GII.17 strain causing a large outbreak in Romania in 2021. Our study shows that the 2021 strain belongs to a novel cluster of genotype GII.17, different from the two previously recognised P.17 clusters. Distinctive substitutions in predicted conformational epitopes of VP1 were identified for this new cluster. Also, our phylogenetic analysis showed the existence of another P.17 cluster grouping strains from France and Canada.
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Affiliation(s)
- Sorin Dinu
- Molecular Epidemiology for Communicable Diseases Laboratory, Cantacuzino National Military Medical Institute for Research and Development, 103 Splaiul Independenței, Bucharest, 050096, Romania.
| | - Mihaela Oprea
- Molecular Epidemiology for Communicable Diseases Laboratory, Cantacuzino National Military Medical Institute for Research and Development, 103 Splaiul Independenței, Bucharest, 050096, Romania
| | - Ramona-Ionela Iordache
- Molecular Epidemiology for Communicable Diseases Laboratory, Cantacuzino National Military Medical Institute for Research and Development, 103 Splaiul Independenței, Bucharest, 050096, Romania
| | - Lavinia-Cipriana Rusu
- National Institute of Public Health, National Center for Surveillance and Control of Communicable Diseases, 1-3 Doctor Leonte Anastasievici, Bucharest, 050463, Romania
| | - Codruța-Romanița Usein
- Molecular Epidemiology for Communicable Diseases Laboratory, Cantacuzino National Military Medical Institute for Research and Development, 103 Splaiul Independenței, Bucharest, 050096, Romania
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Minimal Antigenic Evolution after a Decade of Norovirus GII.4 Sydney_2012 Circulation in Humans. J Virol 2023; 97:e0171622. [PMID: 36688654 PMCID: PMC9973034 DOI: 10.1128/jvi.01716-22] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Norovirus is a major human pathogen that can cause severe gastroenteritis in vulnerable populations. The extensive viral diversity presented by human noroviruses constitutes a major roadblock for the development of effective vaccines. In addition to the large number of genotypes, antigenically distinct variants of GII.4 noroviruses have chronologically emerged over the last 3 decades. The last variant to emerge, Sydney_2012, has been circulating at high incidence worldwide for over a decade. We analyzed 1449 capsid sequences from GII.4 Sydney_2012 viruses to determine genetic changes indicative of antigenic diversification. Phylogenetic analyses show that Sydney_2012 viruses scattered within the tree topology with no single cluster dominating during a given year or geographical location. Fourteen residues presented high variability, 7 of which mapped to 4 antigenic sites. Notably, ~52% of viruses presented mutations at 2 or more antigenic sites. Mutational patterns showed that residues 297 and 372, which map to antigenic site A, changed over time. Virus-like particles (VLPs) developed from wild-type Sydney_2012 viruses and engineered to display all mutations detected at antigenic sites were tested against polyclonal sera and monoclonal antibodies raised against Sydney_2012 and Farmington_Hills_2002 VLPs. Minimal changes in reactivity were detected with polyclonal sera and only 4 MAbs lost binding, with all mapping to antigenic site A. Notably, reversion of residues from Sydney_2012 reconstituted epitopes from ancestral GII.4 variants. Overall, this study demonstrates that, despite circulating for over a decade, Sydney_2012 viruses present minimal antigenic diversification and provides novel insights on the diversification of GII.4 noroviruses that could inform vaccine design. IMPORTANCE GII.4 noroviruses are the major cause of acute gastroenteritis in all age groups. This predominance has been attributed to the continued emergence of phylogenetically discrete variants that escape immune responses to previous infections. The last GII.4 variant to emerge, Sydney_2012, has been circulating at high incidence for over a decade, raising the question of whether this variant is undergoing antigenic diversification without presenting a major distinction at the phylogenetic level. Sequence analyses that include >1400 capsid sequences from GII.4 Sydney_2012 showed changes in 4 out of the 6 major antigenic sites. Notably, while changes were detected in one of the most immunodominant sites over time, these resulted in minimal changes in the antigenic profile of these viruses. This study provides new insights on the mechanism governing the antigenic diversification of GII.4 norovirus that could help in the development of cross-protective vaccines to human noroviruses.
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Patterns and Temporal Dynamics of Natural Recombination in Noroviruses. Viruses 2023; 15:v15020372. [PMID: 36851586 PMCID: PMC9961210 DOI: 10.3390/v15020372] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/16/2023] [Accepted: 01/23/2023] [Indexed: 01/31/2023] Open
Abstract
Noroviruses infect a wide range of mammals and are the major cause of gastroenteritis in humans. Recombination at the junction of ORF1 encoding nonstructural proteins and ORF2 encoding major capsid protein VP1 is a well-known feature of noroviruses. Using all available complete norovirus sequences, we systematically analyzed patterns of natural recombination in the genus Norovirus both throughout the genome and across the genogroups. Recombination events between nonstructural (ORF1) and structural genomic regions (ORF2 and ORF3) were found in all analyzed genogroups of noroviruses, although recombination was most prominent between members of GII, the most common genogroup that infects humans. The half-life times of recombinant forms (clades without evidence of recombination) of human GI and GII noroviruses were 10.4 and 8.4-11.3 years, respectively. There was evidence of many recent recombination events, and most noroviruses that differed by more than 18% of nucleotide sequence were recombinant relative to each other. However, there were no distinct recombination events between viruses that differed by over 42% in ORF2/3, consistent with the absence of systematic recombination between different genogroups. The few inter-genogroup recombination events most likely occurred between ancient viruses before they diverged into contemporary genogroups. The recombination events within ORF1 or between ORF2/3 were generally rare. Thus, noroviruses routinely exchange full structural and nonstructural blocks of the genome, providing a modular evolution.
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Zhou N, Huang Y, Zhou L, Li M, Jin H. Molecular Evolution of RNA-Dependent RNA Polymerase Region in Norovirus Genogroup I. Viruses 2023; 15:166. [PMID: 36680206 PMCID: PMC9861054 DOI: 10.3390/v15010166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 01/06/2023] Open
Abstract
Norovirus is the leading viral agent of gastroenteritis in humans. RNA-dependent RNA polymerase (RdRp) is essential in the replication of norovirus RNA. Here, we present a comprehensive evolutionary analysis of the norovirus GI RdRp gene. Our results show that the norovirus GI RdRp gene can be divided into three groups, and that the most recent common ancestor was 1484. The overall evolutionary rate of GI RdRp is 1.821 × 10-3 substitutions/site/year. Most of the amino acids of the GI RdRp gene were under negative selection, and only a few positively selected sites were recognized. Amino acid substitutions in the GI RdRp gene accumulated slowly over time. GI.P1, GI.P3 and GI.P6 owned the higher evolutionary rates. GI.P11 and GI.P13 had the faster accumulation rate of amino acid substitutions. GI.P2, GI.P3, GI.P4, GI.P6 and GI.P13 presented a strong linear evolution. These results reveal that the norovirus GI RdRp gene evolves conservatively, and that the molecular evolutionary characteristics of each P-genotype are diverse. Sequencing in RdRp and VP1 of norovirus should be advocated in the surveillance system to explore the effect of RdRp on norovirus activity.
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Affiliation(s)
- Nan Zhou
- Key Laboratory of Environmental Medicine and Engineering of Ministry of Education, Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing 210009, China
| | - Yue Huang
- Key Laboratory of Environmental Medicine and Engineering of Ministry of Education, Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing 210009, China
| | - Lu Zhou
- Department of Acute Infectious Diseases, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Mingma Li
- Key Laboratory of Environmental Medicine and Engineering of Ministry of Education, Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing 210009, China
| | - Hui Jin
- Key Laboratory of Environmental Medicine and Engineering of Ministry of Education, Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing 210009, China
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Phengma P, Khamrin P, Jampanil N, Yodmeeklin A, Ushijima H, Maneekarn N, Kumthip K. The emergence of recombinant norovirus GII.12[P16] and predominance of GII.3[P12] strains in pediatric patients with acute gastroenteritis in Thailand, 2019-2020. J Med Virol 2023; 95:e28321. [PMID: 36397269 DOI: 10.1002/jmv.28321] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 10/17/2022] [Accepted: 11/16/2022] [Indexed: 11/19/2022]
Abstract
Norovirus (NoV) and sapovirus (SaV) are important pathogens that cause acute gastroenteritis (AGE) in all age groups, commonly in children worldwide. Recently, a number of studies have reported a wide variety of NoV recombinant strains. This study aimed to investigate the distribution of NoV and SaV recombinant strains circulating in Chiang Mai, Thailand, during 2019-2020. One hundred and twenty-four NoV and seven SaV strains detected in children admitted to the hospital with AGE were included in this study. The partial RNA-dependent RNA-polymerase (RdRp)/VP1 regions of these NoV and SaV strains were analyzed by phylogenetic analysis, Simplot, and RDP software. Overall, eight recombination patterns of NoV were detected. NoV GII.4[P16] was the most common strain detected (39.1%), followed by GII.3[P12] (25.0%), GII.4[P31] (17.2%), and other recombinant strains were detected at a lower rate. NoV GII.12[P16] strains were detected for the first time in Thailand. For SaV, none of the recombinant strains was detected. All SaV strains, GI.1/GI.1, GI.2/GI.2, and GII.5/GII.5, exhibited VP1 genotype corresponded to RdRp genotype. In conclusion, this study demonstrates the distribution and diversity of NoV and SaV recombinant strains circulating in pediatric patients with AGE in Chiang Mai, during 2019-2020 with the emergence of NoV GII.3[P12] and GII.12[P16].
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Affiliation(s)
- Phitchakorn Phengma
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Pattara Khamrin
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence (Emerging and Re-Emerging Diarrheal Viruses), Chiang Mai University, Chiang Mai, Thailand
| | - Nutthawadee Jampanil
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Arpaporn Yodmeeklin
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence (Emerging and Re-Emerging Diarrheal Viruses), Chiang Mai University, Chiang Mai, Thailand
| | - Hiroshi Ushijima
- Department of Pathology and Microbiology, Division of Microbiology, Nihon University School of Medicine, Tokyo, Japan
| | - Niwat Maneekarn
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence (Emerging and Re-Emerging Diarrheal Viruses), Chiang Mai University, Chiang Mai, Thailand
| | - Kattareeya Kumthip
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence (Emerging and Re-Emerging Diarrheal Viruses), Chiang Mai University, Chiang Mai, Thailand
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Tohma K, Ushijima H. [Molecular epidemiology and evolution of human noroviruses]. Uirusu 2023; 73:17-32. [PMID: 39343517 DOI: 10.2222/jsv.73.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/01/2024]
Abstract
Noroviruses are the most common viral cause of acute gastroenteritis after the introduction of rotavirus vaccines. Norovirus infection can cause severe symptoms in vulnerable populations including young children and the elderly. Thus, it is still a leading cause of death from diarrhea in children in developing countries. Recent advancement of genomics platforms facilitated understanding of the epidemiology of norovirus, while the whole picture of norovirus diversity is still undetermined. Currently, there are no approved vaccines for norovirus, but state-of-the-art norovirus cultivation systems could elucidate the antigenic diversity of this fast-evolving virus. In this review, we will summarize the historical and latest findings of norovirus epidemiology, diversity, and evolution.
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Affiliation(s)
- Kentaro Tohma
- Division of Viral Products, US Food and Drug Administration, Maryland, Unites States
| | - Hiroshi Ushijima
- Division of Microbiology, Department of Pathology and Microbiology, Nihon University School of Medicine, Tokyo, Japan
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Gao J, Zhang Z, Xue L, Li Y, Cheng T, Meng L, Li Y, Cai W, Hong X, Zhang J, Wang J, Chen M, Ye Q, Ding Y, Wu Q. GII.17[P17] and GII.8[P8] noroviruses showed different RdRp activities associated with their epidemic characteristics. J Med Virol 2023; 95:e28216. [PMID: 36254681 DOI: 10.1002/jmv.28216] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 09/23/2022] [Accepted: 10/07/2022] [Indexed: 01/11/2023]
Abstract
Norovirus is the primary foodborne pathogenic agent causing viral acute gastroenteritis. It possesses broad genetic diversity and the prevalence of different genotypes varies substantially. However, the differences in RNA-dependent RNA polymerase (RdRp) activity among different genotypes of noroviruses remain unclear. In this study, the molecular mechanism of RdRp activity difference between the epidemic strain GII.17[P17] and the non-epidemic strain GII.8[P8] was characterized. By evaluating the evolutionary history of RdRp sequences with Markov Chain Monte Carlo method, the evolution rate of GII.17[P17] variants was higher than that of GII.8[P8] variants (1.22 × 10-3 nucleotide substitutions/site/year to 9.31 × 10-4 nucleotide substitutions/site/year, respectively). The enzyme catalytic reaction demonstrated that the Vmax value of GII.17[P17] RdRp was 2.5 times than that of GII.8[P8] RdRp. And the Km of GII.17[P17] and GII.8[P8] RdRp were 0.01 and 0.15 mmol/L, respectively. Then, GII.8[P8] RdRp fragment mutants (A-F) were designed, among which GII.8[P8]-A/B containing the conserved motif G/F were found to have significant effects on improving RdRp activity. The Km values of GII.8[P8]-A/B reached 0.07 and 0.06 mmol/L, respectively. And their Vmax values were 1.34 times than that of GII.8[P8] RdRp. In summary, our results suggested that RdRp activities were correlated with their epidemic characteristics. These findings will ultimately provide a better understanding in replication mechanism of noroviruses and development of antiviral drugs.
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Affiliation(s)
- Junshan Gao
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Key Laboratory of Agricultural Microbiomics and Precision Application, Ministry of Agriculture and Rural Affairs, Guangdong, Guangzhou, China
| | - Zilei Zhang
- Inspection and Quarantine Technology Communication Department, Shanghai Customs College, Shanghai, China
| | - Liang Xue
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Key Laboratory of Agricultural Microbiomics and Precision Application, Ministry of Agriculture and Rural Affairs, Guangdong, Guangzhou, China
| | - Ying Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Key Laboratory of Agricultural Microbiomics and Precision Application, Ministry of Agriculture and Rural Affairs, Guangdong, Guangzhou, China
| | - Tong Cheng
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Key Laboratory of Agricultural Microbiomics and Precision Application, Ministry of Agriculture and Rural Affairs, Guangdong, Guangzhou, China
| | - Luobing Meng
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Key Laboratory of Agricultural Microbiomics and Precision Application, Ministry of Agriculture and Rural Affairs, Guangdong, Guangzhou, China
| | - Yijing Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Key Laboratory of Agricultural Microbiomics and Precision Application, Ministry of Agriculture and Rural Affairs, Guangdong, Guangzhou, China
| | - Weicheng Cai
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Key Laboratory of Agricultural Microbiomics and Precision Application, Ministry of Agriculture and Rural Affairs, Guangdong, Guangzhou, China
| | - Xiaojing Hong
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Key Laboratory of Agricultural Microbiomics and Precision Application, Ministry of Agriculture and Rural Affairs, Guangdong, Guangzhou, China
| | - Jumei Zhang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Key Laboratory of Agricultural Microbiomics and Precision Application, Ministry of Agriculture and Rural Affairs, Guangdong, Guangzhou, China
| | - Juan Wang
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Moutong Chen
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Key Laboratory of Agricultural Microbiomics and Precision Application, Ministry of Agriculture and Rural Affairs, Guangdong, Guangzhou, China
| | - Qinghua Ye
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Key Laboratory of Agricultural Microbiomics and Precision Application, Ministry of Agriculture and Rural Affairs, Guangdong, Guangzhou, China
| | - Yu Ding
- Department of Food Science & Technology, Institute of Food Safety and Nutrition, Jinan University, Guangzhou, China
| | - Qingping Wu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Key Laboratory of Agricultural Microbiomics and Precision Application, Ministry of Agriculture and Rural Affairs, Guangdong, Guangzhou, China
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Mabasa VV, van Zyl WB, Ismail A, Allam M, Taylor MB, Mans J. Multiple Novel Human Norovirus Recombinants Identified in Wastewater in Pretoria, South Africa by Next-Generation Sequencing. Viruses 2022; 14:v14122732. [PMID: 36560736 PMCID: PMC9788511 DOI: 10.3390/v14122732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/25/2022] [Accepted: 12/02/2022] [Indexed: 12/12/2022] Open
Abstract
The genogroup II genotype 4 (GII.4) noroviruses are a major cause of viral gastroenteritis. Since the emergence of the Sydney_2012 variant, no novel norovirus GII.4 variants have been reported. The high diversity of noroviruses and periodic emergence of novel strains necessitates continuous global surveillance. The aim of this study was to assess the diversity of noroviruses in selected wastewater samples from Pretoria, South Africa (SA) using amplicon-based next-generation sequencing (NGS). Between June 2018 and August 2020, 200 raw sewage and final effluent samples were collected fortnightly from two wastewater treatment plants in Pretoria. Viruses were recovered using skimmed milk flocculation and glass wool adsorption-elution virus recovery methods and screened for noroviruses using a one-step real-time reverse-transcription PCR (RT-PCR). The norovirus BC genotyping region (570-579 bp) was amplified from detected norovirus strains and subjected to Illumina MiSeq NGS. Noroviruses were detected in 81% (162/200) of samples. The majority (89%, 89/100) of raw sewage samples were positive for at least one norovirus, compared with 73% (73/100) of final effluent samples. Overall, a total of 89 different GI and GII RdRp-capsid combinations were identified, including 51 putative novel recombinants, 34 previously reported RdRp-capsid combinations, one emerging novel recombinant and three Sanger-sequencing confirmed novel recombinants.
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Affiliation(s)
- Victor Vusi Mabasa
- Department of Medical Virology, Faculty of Health Sciences, University of Pretoria, Private Bag X323, Gezina, Pretoria 0031, South Africa
| | - Walda Brenda van Zyl
- Department of Medical Virology, Faculty of Health Sciences, University of Pretoria, Private Bag X323, Gezina, Pretoria 0031, South Africa
- National Health Laboratory Service, Tshwane Academic Division, Pretoria 0002, South Africa
| | - Arshad Ismail
- Sequencing Core Facility, National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg 2192, South Africa
- Department of Biochemistry and Microbiology, Faculty of Science, Engineering and Agriculture, University of Venda, Thohoyandou 0950, South Africa
| | - Mushal Allam
- Sequencing Core Facility, National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg 2192, South Africa
- Department of Genetics and Genomics, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain 15551, United Arab Emirates
| | - Maureen Beatrice Taylor
- Department of Medical Virology, Faculty of Health Sciences, University of Pretoria, Private Bag X323, Gezina, Pretoria 0031, South Africa
| | - Janet Mans
- Department of Medical Virology, Faculty of Health Sciences, University of Pretoria, Private Bag X323, Gezina, Pretoria 0031, South Africa
- Correspondence: ; Tel.: +27-12-319-2660
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36
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Genetic characteristics of archival noroviruses detected from the 1970s to the 1990s. Arch Virol 2022; 167:2723-2727. [PMID: 36087133 DOI: 10.1007/s00705-022-05595-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 08/08/2022] [Indexed: 12/14/2022]
Abstract
The genetic characterization of archival specimens is important for evaluating the evolutionary processes of noroviruses. Complete viral genome sequences, GVIII.1[GII.P28] and GIX.1[GII.P15], were determined from two archival specimens collected in Tokyo, Japan, in 1986 and 1995. In addition, complete VP1 and partial RdRp sequences of four samples collected between 1975 and 1983 were determined. Two viruses were classified as GI.5[P5] and GI.9[P9]; however, the viruses from the other two samples could not be assigned to any known genotypes using norovirus typing tools and phylogenetic analysis, suggesting that they might be untypable genotypes. Further evolutionary analysis of these viruses is warranted.
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Leroux-Roels I, Maes C, Joye J, Jacobs B, Jarczowski F, Diessner A, Janssens Y, Waerlop G, Tamminen K, Heinimäki S, Blazevic V, Leroux-Roels G, Klimyuk V, Adachi H, Hiruta K, Thieme F. A randomized, double-blind, placebo-controlled, dose-escalating phase I trial to evaluate safety and immunogenicity of a plant-produced, bivalent, recombinant norovirus-like particle vaccine. Front Immunol 2022; 13:1021500. [PMID: 36275772 PMCID: PMC9585308 DOI: 10.3389/fimmu.2022.1021500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 09/21/2022] [Indexed: 11/21/2022] Open
Abstract
Noroviruses (NoV) are the leading cause of epidemic acute gastroenteritis in humans worldwide and a safe and effective vaccine is needed. Here, a phase I, double-blind, placebo-controlled clinical trial was performed in 60 healthy adults, 18 to 40 years old. Safety (primary objective) and immunogenicity (secondary and exploratory objectives) of a bivalent (GI.4 and GII.4), plant-produced, virus-like particle (VLP), NoV vaccine candidate formulation were investigated at two dose levels (50 µg + 50 µg and 150 µg + 150 µg) without adjuvant. Overall, 13 subjects (65.0%) in the 50 µg group, 16 subjects (80.0%) in the 150 µg group, and 14 subjects (70.0%) in the placebo group reported at least 1 solicited local or general symptom during the 7-day post-vaccination periods following each dose. Severe solicited adverse events (AEs) were rare (2 events in the 50 µg group). A total of 8 subjects (40.0%) in each group reported at least one unsolicited AE during the 28-day post-vaccination periods. Immunogenicity was assessed on days 1, 8, 29, 57, 183 and 365. All subjects were pre-exposed to norovirus as indicated by baseline levels of the different immunological parameters examined. Vaccine-specific humoral and cellular immune responses increased after the first dose but did not rise further after the second vaccination. Increased GI.4- and GII.4-specific IgG titers persisted until day 365. The vaccine elicited cross-reactive IgG antibodies against non-vaccine NoV VLPs, which was more pronounced for NoV strains of the same genotype as the GII.4 vaccine strain than for non-vaccine genotypes. Significant blocking anti-GI.4 and anti-GII.4 VLP titers were triggered in both dose groups. Lymphoproliferation assays revealed strong cell-mediated immune responses that persisted until day 365. In conclusion, both dose levels were safe and well-tolerated, and no higher incidence of AEs was observed in the higher dose group. The data show that a single dose of the vaccine formulated at 50 µg of each VLP is sufficient to reach a peak immune response after 8 to 28 days. The results of this Phase I study warrant further evaluation of the non-adjuvanted vaccine candidate. Clinical trial registration https://clinicaltrials.gov/ct2/show/record/NCT05508178, identifier (NCT05508178).
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Affiliation(s)
- Isabel Leroux-Roels
- Center for Vaccinology (CEVAC), Ghent University and University Hospital, Ghent, Belgium
| | - Cathy Maes
- Center for Vaccinology (CEVAC), Ghent University and University Hospital, Ghent, Belgium
| | - Jasper Joye
- Center for Vaccinology (CEVAC), Ghent University and University Hospital, Ghent, Belgium
| | - Bart Jacobs
- Center for Vaccinology (CEVAC), Ghent University and University Hospital, Ghent, Belgium
| | | | | | - Yorick Janssens
- Center for Vaccinology (CEVAC), Ghent University and University Hospital, Ghent, Belgium
| | - Gwenn Waerlop
- Center for Vaccinology (CEVAC), Ghent University and University Hospital, Ghent, Belgium
| | - Kirsi Tamminen
- Vaccine Research Center, University of Tampere, Tampere, Finland
| | - Suvi Heinimäki
- Vaccine Research Center, University of Tampere, Tampere, Finland
| | - Vesna Blazevic
- Vaccine Research Center, University of Tampere, Tampere, Finland
| | - Geert Leroux-Roels
- Center for Vaccinology (CEVAC), Ghent University and University Hospital, Ghent, Belgium
| | | | - Hiroshi Adachi
- Icon Genetics GmbH, a Denka Company, Halle, Germany
- Denka Co., Ltd., Tokyo, Japan
| | - Kazuyuki Hiruta
- Icon Genetics GmbH, a Denka Company, Halle, Germany
- Denka Co., Ltd., Tokyo, Japan
| | - Frank Thieme
- Icon Genetics GmbH, a Denka Company, Halle, Germany
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Epifanova NV, Sashina TA, Morozova OV, Oparina SV, Novikova NA. An increase in prevalence of recombinant GII.3[P12] norovirus in sporadic acute diarrhea in children in Nizhny Novgorod, Russia, 2018-2021. Virus Genes 2022; 58:467-472. [PMID: 35680691 DOI: 10.1007/s11262-022-01919-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 05/25/2022] [Indexed: 11/25/2022]
Abstract
Noroviruses are important etiological agents causing acute intestinal infection in humans. In the last decades, the most common norovirus genotype was GII.4 despite a significant genetic diversity among strains, while the active circulation of noroviruses with other genotypes was observed periodically. This study shows an increase in the detection rate of recombinant GII.3[P12] norovirus in Nizhny Novgorod, Russia, from 6.8% in 2018-2019 to 34.9% in 2020-2021. We performed a phylogenetic analysis based on the nucleotide sequences of noroviruses possessing this genotype obtained in this work, as well as presented in the GenBank database. It has been shown that the circulation of GII.3[P12] noroviruses in the study area was the result of several independent introductions, either directly from the Western Pacific region, or through the Asian part of Russia. The polyphyletic origin, the geographical expansion, and the growth of the epidemic significance of the recombinant GII.3[P12] noroviruses were noted.
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Affiliation(s)
- N V Epifanova
- I.N. Blokhina Nizhny Novgorod Research Institute of Epidemiology and Microbiology, Nizhny Novgorod, Russia
| | - T A Sashina
- I.N. Blokhina Nizhny Novgorod Research Institute of Epidemiology and Microbiology, Nizhny Novgorod, Russia
| | - O V Morozova
- I.N. Blokhina Nizhny Novgorod Research Institute of Epidemiology and Microbiology, Nizhny Novgorod, Russia.
| | - S V Oparina
- I.N. Blokhina Nizhny Novgorod Research Institute of Epidemiology and Microbiology, Nizhny Novgorod, Russia
| | - N A Novikova
- I.N. Blokhina Nizhny Novgorod Research Institute of Epidemiology and Microbiology, Nizhny Novgorod, Russia
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