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Wang H, Yin X, Du D, Liang Z, Han Z, Nian H, Ma Q. GsMYB7 encoding a R2R3-type MYB transcription factor enhances the tolerance to aluminum stress in soybean (Glycine max L.). BMC Genomics 2022; 23:529. [PMID: 35869448 PMCID: PMC9306046 DOI: 10.1186/s12864-022-08744-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 07/06/2022] [Indexed: 12/13/2022] Open
Abstract
Background MYB transcription factor (TF) is one of the largest families of TFs in plants and play essential roles in plant growth and development, and is involved in responses to biological and abiotic stress. However, there are few reports on GsMYB7 gene in soybean under aluminum acid stress, and its regulatory mechanism remains unclear. Results The GsMYB7 protein is localized in the nucleus and has transcriptional activation ability. Quantitative real-time PCR (qRT-PCR) results showed that GsMYB7 held a constitutive expression pattern rich in roots. When AlCl3 concentration was 25 µM, the total root surface area (SA) of GsMYB7 transgenic lines were 34.97% higher than that of wild-type Huachun 6 (HC6). While the accumulation of Al3+ in root tip of transgenic plants after aluminum treatment was 17.39% lower than that of wild-type. RNA-sequencing analysis indicated that over 1181 genes were regulated by GsMYB7 and aluminum stress. Among all the regulated genes, the expression levels of glutathione peroxidase, protein kinase, cytochrome and other genes in the transgenic lines were significantly higher than those in wild type by acidic aluminum stress. The bioinformatics and qRT-PCR results showed that 9 candidate genes were induced under the treatments of acidic aluminum stress which were indirectly and/or directly regulated by GsMYB7. After AlCl3 treatments, the transcripts of these genes in GsMYB7 transgenic seedlings were significantly higher than those of wide-type HC6. Conclusions The results suggested that GsMYB7 may enhance soybean tolerance to acidic aluminum stress by regulating the downstream genes. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-022-08744-w.
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Kang YM, Cho HK, An SJ, Kim HJ, Lee YJ, Kang HM. Updating the National Antigen Bank in Korea: Protective Efficacy of Synthetic Vaccine Candidates against H5Nx Highly Pathogenic Avian Influenza Viruses Belonging to Clades 2.3.2.1 and 2.3.4.4. Vaccines (Basel) 2022; 10:vaccines10111860. [PMID: 36366368 PMCID: PMC9697692 DOI: 10.3390/vaccines10111860] [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: 10/16/2022] [Revised: 11/01/2022] [Accepted: 11/02/2022] [Indexed: 11/06/2022] Open
Abstract
Since 2018, Korea has been building an avian influenza (AI) national antigen bank for emergency preparedness; this antigen bank is updated every 2 years. To update the vaccine strains in the antigen bank, we used reverse genetics technology to develop two vaccine candidates against avian influenza strains belonging to clades 2.3.2.1d and 2.3.4.4h, and then evaluated their immunogenicity and protective efficacy in SPF chickens challenged with H5 viruses. The two vaccine candidates, named rgCA2/2.3.2.1d and rgES3/2.3.4.4h, were highly immunogenic, with hemagglutination inhibition (HI) titers of 8.2−9.3 log2 against the vaccine strain, and 7.1−7.3 log2 against the lethal challenge viruses (in which the HA genes shared 97% and 95.4% homology with that of rgCA2/2.3.2.1d and rgES3/2.3.4.4h, respectively). A full dose of each vaccine candidate provided 100% protection against the challenge viruses, with a reduction in clinical symptoms and virus shedding. A 1/10 dose provided similar levels of protection, whereas a 1/100 dose resulted in mortality and virus shedding by 7 dpi. Moreover, immunity induced by the two vaccines was long lasting, with HI titers of >7 log2 against the vaccine strain remaining after 6 months. Thus, the two vaccine candidates show protective efficacy and can be used to update the AI national antigen bank.
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Affiliation(s)
| | | | | | | | | | - Hyun-Mi Kang
- Correspondence: ; Tel.: +82-549120972; Fax: +82-549120977
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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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Zhao L, Liu Q, Xu FH, Liu H, Zhang J, Liu F, Wang G. Identification and analysis of Rap-Phr system in Bacillus cereus 0-9. FEMS Microbiol Lett 2022; 369:6549557. [PMID: 35293995 DOI: 10.1093/femsle/fnac026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 02/15/2022] [Accepted: 03/14/2022] [Indexed: 11/13/2022] Open
Abstract
In this study, eight rap-related genes were found in the Bacillus cereus 0-9 genome; five rap genes were located on chromosomes and three on large plasmids. Five Rap proteins in B. cereus 0-9 were annotated as 'tetratricopeptide repeat proteins'. SMART Server analysis showed that the eight Rap proteins had typical tetrapeptide repeat sequence (TPR) domains. Biofilm assays and crystal violet staining showed that overexpression of the rapp1 and rap5 genes affected the biofilm formation of B. cereus 0-9, and the activities of Rapp1 and Rap5 proteins were inhibited by their corresponding cognate Phr, suggesting that the Rap-Phr quorum sensing (QS) system might also exist in the B. cereus 0-9 strain. In addition, overexpression of rap1 genes inhibited in the extracellular amylase decomposition capacity of B. cereus 0-9. The results of the sporulation assay indicated that overexpression of the eight rap genes inhibited the spore formation of B. cereus 0-9 to varying degrees. These results provide a reference for research on the regulation of the Rap-Phr QS system in B. cereus.
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Affiliation(s)
- Linlin Zhao
- Institute of Microbial Engineering, Laboratory of Bioresource and Applied Microbiology, School of Life Sciences, Henan University, Kaifeng, China
| | - Qing Liu
- Institute of Microbial Engineering, Laboratory of Bioresource and Applied Microbiology, School of Life Sciences, Henan University, Kaifeng, China
| | - Feng Hua Xu
- School of Pharmaceutical, Henan University, Kaifeng, China
| | - Huiping Liu
- Institute of Microbial Engineering, Laboratory of Bioresource and Applied Microbiology, School of Life Sciences, Henan University, Kaifeng, China
| | - Juanmei Zhang
- Institute of Microbial Engineering, Laboratory of Bioresource and Applied Microbiology, School of Life Sciences, Henan University, Kaifeng, China.,School of Pharmaceutical, Henan University, Kaifeng, China
| | - Fengying Liu
- Institute of Microbial Engineering, Laboratory of Bioresource and Applied Microbiology, School of Life Sciences, Henan University, Kaifeng, China.,Engineering Research Center for Applied Microbiology of Henan Province, Kaifeng, China
| | - Gang Wang
- Institute of Microbial Engineering, Laboratory of Bioresource and Applied Microbiology, School of Life Sciences, Henan University, Kaifeng, China.,Engineering Research Center for Applied Microbiology of Henan Province, Kaifeng, China
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Guo CY, Feng Q, Yan LT, Xie X, Liang DY, Li Y, Feng YM, Sun LJ, Hu J. Monoclonal Antibody Targeting the HA191/199 Region of H1N1 Influenza Virus Mediates the Damage of Neural Cells. BIOCHEMISTRY (MOSCOW) 2021; 86:1469-1476. [PMID: 34906050 PMCID: PMC8588936 DOI: 10.1134/s0006297921110109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Vaccination is the most effective mean of preventing influenza virus infections. However, vaccination-induced adverse reactions of the nervous system, the causes of which are unknown, lead to concerns on the safety of influenza A vaccine. In this study, we used flow cytometry, cell ELISA, and immunofluorescence to find that H1-84 monoclonal antibody (mAb) against the191/199 region of the H1N1 influenza virus hemagglutinin (HA) protein binds to neural cells and mediates cell damage. Using molecular simulation software, such as PyMOL and PDB viewer, we demonstrated that the HA191/199 region maintains the overall structure of the HA head. Since the HA191/199 region cannot be removed from the HA structure, it has to be altered via introducing point mutations by site-directed mutagenesis. This will provide an innovative theoretical support for the subsequent modification the influenza A vaccine for increasing its safety.
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MESH Headings
- Antibodies, Monoclonal, Murine-Derived/chemistry
- Antibodies, Monoclonal, Murine-Derived/immunology
- Antibodies, Viral/chemistry
- Antibodies, Viral/immunology
- Cell Line, Tumor
- Hemagglutinin Glycoproteins, Influenza Virus/chemistry
- Hemagglutinin Glycoproteins, Influenza Virus/genetics
- Hemagglutinin Glycoproteins, Influenza Virus/immunology
- Humans
- Influenza A Virus, H1N1 Subtype/chemistry
- Influenza A Virus, H1N1 Subtype/genetics
- Influenza A Virus, H1N1 Subtype/immunology
- Molecular Dynamics Simulation
- Mutagenesis, Site-Directed
- Neurons/metabolism
- Neurons/pathology
- Protein Domains
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Affiliation(s)
- Chun-Yan Guo
- Central Laboratory of Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 710068, China.
- Shaanxi Province Research Center of Cell Immunological Engineering and Technology, Xi'an, Shaanxi, 710068, China
| | - Qing Feng
- Central Laboratory of Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 710068, China
- Shaanxi Province Research Center of Cell Immunological Engineering and Technology, Xi'an, Shaanxi, 710068, China
| | - Li-Ting Yan
- Central Laboratory of Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 710068, China
- Shaanxi Province Research Center of Cell Immunological Engineering and Technology, Xi'an, Shaanxi, 710068, China
| | - Xin Xie
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, China
| | - Dao-Yan Liang
- Central Laboratory of Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 710068, China
- Shaanxi Province Research Center of Cell Immunological Engineering and Technology, Xi'an, Shaanxi, 710068, China
| | - Yan Li
- Central Laboratory of Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 710068, China
- Shaanxi Province Research Center of Cell Immunological Engineering and Technology, Xi'an, Shaanxi, 710068, China
| | - Yang-Meng Feng
- Central Laboratory of Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 710068, China
- Shaanxi Province Research Center of Cell Immunological Engineering and Technology, Xi'an, Shaanxi, 710068, China
| | - Li-Jun Sun
- Central Laboratory of Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 710068, China.
- Shaanxi Province Research Center of Cell Immunological Engineering and Technology, Xi'an, Shaanxi, 710068, China
| | - Jun Hu
- Central Laboratory of Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 710068, China.
- Shaanxi Province Research Center of Cell Immunological Engineering and Technology, Xi'an, Shaanxi, 710068, China
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Guo C, Sun L, Hao S, Huang X, Hu H, Liang D, Feng Q, Li Y, Feng Y, Xie X, Hu J. Monoclonal antibody against H1N1 influenza virus hemagglutinin cross reacts with hnRNPA1 and hnRNPA2/B1. Mol Med Rep 2020; 22:3969-3975. [PMID: 32901845 PMCID: PMC7533452 DOI: 10.3892/mmr.2020.11494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 07/30/2020] [Indexed: 12/15/2022] Open
Abstract
Following influenza A vaccination, certain individuals exhibit adverse reactions in the nervous system, which causes a problem with the safety of the influenza A vaccine. However, to the best of our knowledge, the underlying mechanism of this is unknown. The present study revealed that a monoclonal antibody (H1‑84mAb) against the H1N1 influenza virus hemagglutinin (HA) protein cross‑reacted with an antigen from brain tissue. Total brain tissue protein was immunoprecipitated with this cross‑reactive antibody, and mass spectrometry revealed that the bound antigens were heterogeneous nuclear ribonucleoprotein (hnRNP) A1 and hnRNPA2/B1. Subsequently, the two proteins were expressed in bacteria and it was demonstrated that H1‑84mAb bound to hnRNPA1 and hnRNPA2/B1. These two proteins were expressed in three segments and the cross‑reactivity of H1‑84mAb with the glycine (Gly)‑rich domains of hnRNPA1 (195aa‑320aa) and hnRNPA2/B1 (202aa‑349aa) was determined using ELISA blocking experiments. It was concluded that the Gly‑rich domains of these two proteins are heterophilic antigens that cross‑react with influenza virus HA. The association between the heterophilic antigen Gly‑rich domains and the safety of influenza A vaccines remains to be investigated.
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Affiliation(s)
- Chunyan Guo
- Central Laboratory of Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Medical School, Xi'an Jiaotong University, Shaanxi Province Research Centre of Cell Immunological Engineering and Technology, Key Laboratory of Microbial Infections and Autoimmune Diseases, Xi'an, Shaanxi 710068, P.R. China
| | - Lijun Sun
- Central Laboratory of Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Medical School, Xi'an Jiaotong University, Shaanxi Province Research Centre of Cell Immunological Engineering and Technology, Key Laboratory of Microbial Infections and Autoimmune Diseases, Xi'an, Shaanxi 710068, P.R. China
| | - Shuangping Hao
- Guangshui Traditional Chinese Medicine Hospital of Hubei Province, Guangshui, Hubei 432700, P.R. China
| | - Xiaoyan Huang
- Central Laboratory of Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Medical School, Xi'an Jiaotong University, Shaanxi Province Research Centre of Cell Immunological Engineering and Technology, Key Laboratory of Microbial Infections and Autoimmune Diseases, Xi'an, Shaanxi 710068, P.R. China
| | - Hanyu Hu
- School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA 70112, USA
| | - Daoyan Liang
- Central Laboratory of Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Medical School, Xi'an Jiaotong University, Shaanxi Province Research Centre of Cell Immunological Engineering and Technology, Key Laboratory of Microbial Infections and Autoimmune Diseases, Xi'an, Shaanxi 710068, P.R. China
| | - Qing Feng
- Central Laboratory of Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Medical School, Xi'an Jiaotong University, Shaanxi Province Research Centre of Cell Immunological Engineering and Technology, Key Laboratory of Microbial Infections and Autoimmune Diseases, Xi'an, Shaanxi 710068, P.R. China
| | - Yan Li
- Central Laboratory of Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Medical School, Xi'an Jiaotong University, Shaanxi Province Research Centre of Cell Immunological Engineering and Technology, Key Laboratory of Microbial Infections and Autoimmune Diseases, Xi'an, Shaanxi 710068, P.R. China
| | - Yangmeng Feng
- Central Laboratory of Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Medical School, Xi'an Jiaotong University, Shaanxi Province Research Centre of Cell Immunological Engineering and Technology, Key Laboratory of Microbial Infections and Autoimmune Diseases, Xi'an, Shaanxi 710068, P.R. China
| | - Xin Xie
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, Xi'an, Shaanxi 710069, P.R. China
| | - Jun Hu
- Central Laboratory of Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Medical School, Xi'an Jiaotong University, Shaanxi Province Research Centre of Cell Immunological Engineering and Technology, Key Laboratory of Microbial Infections and Autoimmune Diseases, Xi'an, Shaanxi 710068, P.R. China
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