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Lv C, Zhao Y, Jiang L, Zhao L, Wu C, Hui X, Hu X, Shao Z, Xia X, Sun X, Zhang Q, Jin M. Development of a Dual ELISA for the Detection of CD2v-Unexpressed Lower-Virulence Mutational ASFV. Life (Basel) 2021; 11:life11111214. [PMID: 34833090 PMCID: PMC8626036 DOI: 10.3390/life11111214] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/29/2021] [Accepted: 11/02/2021] [Indexed: 11/16/2022] Open
Abstract
African swine fever virus (ASFV) is an important viral pathogen infecting pigs worldwide throughout the pig industry. CD2v (an outer-membrane glycosylated protein of ASFV)-unexpressed lower-virulence mutants have appeared in China and other countries in recent years. Using OIE-recommended quantitative PCR and ELISA methods, people can accurately judge whether pigs are infected with wild-type ASFV. However, the strategy has failed to distinguish ΔCD2v lower-virulence mutants and wild-type ASFV infection. Here, we expressed and purified the CD2v and p30 proteins via CHO cells and successfully established a dual enzyme-linked immunosorbent assay (ELISA), which can be used to differentiate pigs infected with wild-type ASFV or with CD2v-unexpressed lower-virulence mutants. The dual ELISA showed excellent specificity without cross-reactions with antibodies of PRRSV, CSFV, JEV, PRV, or PPV. The dual ELISA could detect ASFV-infected positive serum samples up to dilutions of 5120 times, possessing high sensitivity. Therefore, the application of this dual ELISA approach can play an important role in ASFV epidemiology study and fill the gaps in differential diagnosis.
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Affiliation(s)
- Changjie Lv
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Ya Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Lili Jiang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Li Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Chao Wu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Xianfeng Hui
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Xiaotong Hu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Ziqi Shao
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Xiaohan Xia
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Xiaomei Sun
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Qiang Zhang
- College of Biomedicine and Health, Huazhong Agricultural University, Wuhan 430070, China
- Correspondence: (Q.Z.); (M.J.)
| | - Meilin Jin
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
- Correspondence: (Q.Z.); (M.J.)
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Zhang Q, Zhang H, Gao J, Huang K, Yang Y, Hui X, He X, Li C, Gong W, Zhang Y, Zhao Y, Peng C, Gao X, Chen H, Zou Z, Shi ZL, Jin M. A serological survey of SARS-CoV-2 in cat in Wuhan. Emerg Microbes Infect 2020; 9:2013-2019. [PMID: 32867625 PMCID: PMC7534315 DOI: 10.1080/22221751.2020.1817796] [Citation(s) in RCA: 199] [Impact Index Per Article: 49.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/11/2020] [Accepted: 08/28/2020] [Indexed: 12/14/2022]
Abstract
COVID-19 is a new respiratory illness caused by SARS-CoV-2, and has constituted a global public health emergency. Cat is susceptible to SARS-CoV-2. However, the prevalence of SARS-CoV-2 in cats remains largely unknown. Here, we investigated the infection of SARS-CoV-2 in cats during COVID-19 outbreak in Wuhan by serological detection methods. A cohort of serum samples were collected from cats in Wuhan, including 102 sampled after COVID-19 outbreak, and 39 prior to the outbreak. Fifteen sera collected after the outbreak were positive for the receptor binding domain (RBD) of SARS-CoV-2 by indirect enzyme linked immunosorbent assay (ELISA). Among them, 11 had SARS-CoV-2 neutralizing antibodies with a titer ranging from 1/20 to 1/1080. No serological cross-reactivity was detected between SARS-CoV-2 and type I or II feline infectious peritonitis virus (FIPV). In addition, we continuously monitored serum antibody dynamics of two positive cats every 10 days over 130 days. Their serum antibodies reached the peak at 10 days after first sampling, and declined to the limit of detection within 110 days. Our data demonstrated that SARS-CoV-2 has infected cats in Wuhan during the outbreak and described serum antibody dynamics in cats, providing an important reference for clinical treatment and prevention of COVID-19.
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Affiliation(s)
- Qiang Zhang
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Huajun Zhang
- CAS Key Laboratory of Special Pathogens, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Jindong Gao
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Kun Huang
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Yong Yang
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Xianfeng Hui
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Xinglin He
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Chengfei Li
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Wenxiao Gong
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Yufei Zhang
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Ya Zhao
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Cheng Peng
- CAS Key Laboratory of Special Pathogens, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Xiaoxiao Gao
- CAS Key Laboratory of Special Pathogens, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Huanchun Chen
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Zhong Zou
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, People’s Republic of China
| | - Zheng-Li Shi
- CAS Key Laboratory of Special Pathogens, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Meilin Jin
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, People’s Republic of China
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, People’s Republic of China
- Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture, Wuhan, People’s Republic of China
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Sapkal GN, Sawant PM, Mourya DT. Chandipura Viral Encephalitis: A Brief Review. Open Virol J 2018; 12:44-51. [PMID: 30288194 PMCID: PMC6142667 DOI: 10.2174/1874357901812010044] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 03/15/2018] [Accepted: 03/14/2018] [Indexed: 12/15/2022] Open
Abstract
Introduction: In recent years, the Chandipura virus (CHPV) has emerged as an encephalitic pathogen and found associated with a number of outbreaks in different parts of India. Children under 15 years of age are most susceptible to natural infection. CHPV is emerging as a significant encephalitis, causing virus in the Indian subcontinent. Severe outbreaks caused by the virus have been reported from several parts of India. Expalanation: In the recent past, the noticeable association of CHPV with pediatric sporadic encephalitis cases as well as a number of outbreaks in Andhra Pradesh (2004, 2005, 2007 and 2008), Gujarat in (2005, 2009-12) and Vidarbha region of Maharashtra (2007, 2009-12) have been documented. Prevalence and seasonal activity of the virus in these regions are established by NIV through outbreak investigations, sero-survey and diagnosis of the referred clinical specimens. Recently CHPV has been isolated from pools of sand flies collected during outbreak investigations in Vidarbha region of Maharashtra. Since its discovery from India and above-mentioned activity of CHPV, it was suspected to be restricted only to India. Conclusion: However, CHPV has also been isolated from human cases during 1971-72 in Nigeria, and hedgehogs (Atelerix spiculus) during entomological surveillance in Senegal, Africa (1990-96) and recently referred samples from Bhutan and Nepal and from wild toque macaques (Macaca sinica) at Polonnaruwa, Sri Lanka during 1993 suggest its circulation in many tropical countries. Based on the limited study on vector related report, it appears that sandflies may be the principle vector.
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Affiliation(s)
- Gajanan N Sapkal
- National Institute of Virology, 20-A, Dr. Ambedkar Road, Pune 411001, India
| | - Pradeep M Sawant
- National Institute of Virology, 20-A, Dr. Ambedkar Road, Pune 411001, India
| | - Devendra T Mourya
- National Institute of Virology, 20-A, Dr. Ambedkar Road, Pune 411001, India
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Identification of a conserved neutralizing epitope in the G-protein of Chandipura virus. Arch Virol 2018; 163:3215-3223. [PMID: 30116984 DOI: 10.1007/s00705-018-3987-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 06/14/2018] [Indexed: 12/19/2022]
Abstract
Chandipura virus (CHPV), associated with an encephalitic illness in humans, has caused multiple outbreaks with high mortality in central and western India in recent years. The present study compares surface glycoprotein (G-protein) from prototype and recent outbreak strains using in silico tools and in vitro experiments. In silico epitope predictions (B-cell and T-helper cell) for the sequences, 3D structure prediction and comparison of the G-proteins of the strains: I653514 (Year 1965), CIN0327 (Year 2003) and 148974 (Year 2014) revealed that the CHPV G-protein is stable and antigenic determinants are conserved. A monoclonal antibody developed against strain CIN0327 (named NAbC) was found to neutralize prototype I653514 as well as the currently circulating strain 148974. In silico antigen-antibody interaction studies using molecular docking of predicted structures of NAbC and G-proteins of various CHPV strains led to the identification of a conserved neutralizing epitope in the fusion domain of G-protein, which also contained a putative T-helper peptide. The identification of a conserved neutralizing epitope in domain IV (fusion domain amino acids 53 to 172) of CHPV G-protein is an important finding that may have the scope towards the development of protective targets against CHPV infection.
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