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Guo CY, Jin ZK, Feng Q, Feng YM, Sun LJ, Xu CX, Zhang YL. The heterophilicic epitopes in conserved HA regions of human and avian influenza viruses can produce antibodies that bound to kidney tissue. Microb Pathog 2023; 185:106331. [PMID: 37678657 DOI: 10.1016/j.micpath.2023.106331] [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: 05/31/2023] [Revised: 07/27/2023] [Accepted: 09/02/2023] [Indexed: 09/09/2023]
Abstract
Influenza virus infection can cause kidney damage. However, the link between influenza infection and disease is still unclear. The purpose of this study was to analyze the relationship between heterophilic epitopes on H5N1 hemagglutinin (HA) and disease. The monoclonal antibody (mAb) against H5N1 was prepared, mAbs binding to human kidney tissue were screened, and the reactivities of mAbs with five different subtypes of influenza virus were detected. Design and synthesize the peptides according to the common amino acid sequence of these antigens, and analyze the distribution of the epitope on the crystal structure of HA. Immunological methods were used to detect whether the heterophilic epitopes could induce the production of antibodies that cross-react with kidney tissue. The results showed that H5-30 mA b binding to human kidney tissue recognized the heterophilic epitope 191-LVLWGIHHP-199 on the head of HA. The key amino acid were V192, L193, W194 and I196, which were highly conserved in human and avian influenza virus HA. The heterophilic epitope could induce mice to produce different mAbs binding to kidney tissue. Such heterophilic antibodies were also detected in the serum of the patients. It can provide materials for the mechanism of renal diseases caused by influenza virus infection.
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Affiliation(s)
- Chun Yan Guo
- Shaanxi Provincial People's Hospital, Xi'an, 710068, China; Shaanxi Engineering Research Center of Cell Immunology, Xi'an, 710068, China; Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, 710068, China
| | - Zhan Kui Jin
- Shaanxi Provincial People's Hospital, Xi'an, 710068, China
| | - Qing Feng
- Shaanxi Provincial People's Hospital, Xi'an, 710068, China; Shaanxi Engineering Research Center of Cell Immunology, Xi'an, 710068, China; Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, 710068, China
| | - Yang Meng Feng
- Shaanxi Provincial People's Hospital, Xi'an, 710068, China; Shaanxi Engineering Research Center of Cell Immunology, Xi'an, 710068, China
| | - Li Jun Sun
- Shaanxi Provincial People's Hospital, Xi'an, 710068, China; Shaanxi Engineering Research Center of Cell Immunology, Xi'an, 710068, China; Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, 710068, China
| | - Cui Xiang Xu
- Shaanxi Provincial People's Hospital, Xi'an, 710068, China; Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, 710068, China.
| | - Yu Lian Zhang
- Shaanxi Provincial People's Hospital, Xi'an, 710068, China.
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Feng Q, Huang XY, Feng YM, Sun LJ, Sun JY, Li Y, Xie X, Hu J, Guo CY. Identification and analysis of B cell epitopes of hemagglutinin of H1N1 influenza virus. Arch Microbiol 2022; 204:594. [PMID: 36053375 PMCID: PMC9438888 DOI: 10.1007/s00203-022-03133-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 07/06/2022] [Accepted: 07/10/2022] [Indexed: 11/27/2022]
Abstract
The frequent variation of influenza virus hemagglutinin (HA) antigen is the main cause of influenza pandemic. Therefore, the study of B cell epitopes of HA is of great significance in the prevention and control of influenza virus. In this study, the split vaccine of 2009 H1N1 influenza virus was used as immunogen, and the monoclonal antibodies (mAbs) were prepared by conventional hybridoma fusion and screening techniques. The characteristics of mAbs were identified by ELISA method, Western-blot test and hemagglutination inhibition test (HI). Using the obtained mAbs as a tool, the B cell epitopes of HA were predicted by ELISA blocking test, sandwich ELISA method and computer simulation method. Finally, four mAbs against HA antigen of H1N1 influenza virus were obtained. The results of ELISA and computer prediction showed that there were at least two types of epitopes on HA of influenza virus. The results of this study complemented the existing methods for predicting HA epitopes, and also provided a new method for predicting other pathogenic microorganisms.
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Affiliation(s)
- Qing Feng
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China
| | - Xiao-Yan Huang
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China
| | - Yang-Meng Feng
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China
| | - Li-Jun Sun
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China
| | - Jing-Ying Sun
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China
| | - Yan Li
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China
| | - Xin Xie
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Science, Northwest University, Xi'an, China
| | - Jun Hu
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China.
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China.
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China.
| | - Chun-Yan Guo
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China.
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China.
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China.
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