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Examination of immunogenic properties of recombinant antigens based on p22 protein from African swine fever virus. J Vet Res 2022; 66:297-304. [PMID: 36349136 PMCID: PMC9597933 DOI: 10.2478/jvetres-2022-0043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 08/10/2022] [Indexed: 11/20/2022] Open
Abstract
Abstract
Introduction
The single member of the Asfarviridae family is African swine fever virus (ASFV). This double-stranded DNA virus infects wild and farmed swine and loses the pig industry large sums of money. An inner envelope, capsid, and outer envelope are parts of the ASFV particle containing structural proteins playing different roles in the process of infection or host immune defence evasion. When expressed by the baculovirus system, the p22 protein from the inner envelope was found to induce partial protection against a virulent virus strain. This study aimed to express a part of this protein in a different system and evaluate its immunogenicity.
Material and Methods
We designed two proteins, the extracellular (C terminal) part of the p22 protein (p22Ct) and its fusion with the heat-labile enterotoxin B subunit from Escherichia coli (LTB-p22Ct), which is supposed to be a potent enhancer of the immune response. Both proteins were produced in the E. coli expression system and subsequently used for mice immunisation to analyse their safety and immunogenicity.
Results
The protein fused with LTB did not show the expected adjuvant properties and did not prove safe, because abscess formation was observed after immunisation. In contrast, immunisation with the p22Ct protein alone induced a higher antibody titre but caused no adverse symptoms.
Conclusion
These results show the high potential of the p22Ct region as an immunogenic protein for ASFV serological detection purposes.
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Su F, Wu Y, Li J, Huang Y, Yu B, Xu L, Xue Y, Xiao C, Yuan X. Escherichia coli Heat-Labile Enterotoxin B Subunit Combined with Ginsenoside Rg1 as an Intranasal Adjuvant Triggers Type I Interferon Signaling Pathway and Enhances Adaptive Immune Responses to an Inactivated PRRSV Vaccine in ICR Mice. Vaccines (Basel) 2021; 9:vaccines9030266. [PMID: 33809809 PMCID: PMC8002527 DOI: 10.3390/vaccines9030266] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/12/2021] [Accepted: 03/14/2021] [Indexed: 12/20/2022] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) is a major pathogen that has threatened the global swine industry for almost 30 years. Because current vaccines do not provide complete protection, exploration of new preventive strategies is urgently needed. Here, we combined a heat-labile enterotoxin B subunit of Escherichia coli (LTB) and ginsenoside Rg1 to form an intranasal adjuvant and evaluated its enhancement of immune responses in mice when added to an inactivated-PRRSV vaccine. The combination adjuvant synergistically elicited higher neutralizing and non-neutralizing (immunoglobulin G and A) antibody responses in the circulatory system and respiratory tract, and enhanced T and B lymphocyte proliferation, CD4+ T-cell priming, and cytotoxic CD4+ T cell activities in mononuclear cells from spleen and lung tissues when compared to the PRRSV vaccine alone, and it resulted in balanced Th1/Th2/Th17 responses. More importantly, we observed that the combination adjuvant also up-regulated type I interferon signaling, which may contribute to improvement in adaptive immune responses. These results highlight the potential value of a combined adjuvant approach for improving the efficacy of vaccination against PRRSV. Further study is required to evaluate the efficacy of this combined adjuvant in swine.
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Affiliation(s)
- Fei Su
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310002, China; (F.S.); (Y.W.); (J.L.); (Y.H.); (B.Y.); (L.X.); (C.X.)
| | - Yige Wu
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310002, China; (F.S.); (Y.W.); (J.L.); (Y.H.); (B.Y.); (L.X.); (C.X.)
| | - Junxing Li
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310002, China; (F.S.); (Y.W.); (J.L.); (Y.H.); (B.Y.); (L.X.); (C.X.)
| | - Yee Huang
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310002, China; (F.S.); (Y.W.); (J.L.); (Y.H.); (B.Y.); (L.X.); (C.X.)
| | - Bin Yu
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310002, China; (F.S.); (Y.W.); (J.L.); (Y.H.); (B.Y.); (L.X.); (C.X.)
| | - Lihua Xu
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310002, China; (F.S.); (Y.W.); (J.L.); (Y.H.); (B.Y.); (L.X.); (C.X.)
| | - Yin Xue
- Zhejiang Center of Animal Disease Control, Hangzhou 310020, China;
| | - Chenwen Xiao
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310002, China; (F.S.); (Y.W.); (J.L.); (Y.H.); (B.Y.); (L.X.); (C.X.)
| | - Xiufang Yuan
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310002, China; (F.S.); (Y.W.); (J.L.); (Y.H.); (B.Y.); (L.X.); (C.X.)
- Correspondence:
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3
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Peng X, Zhang R, Wang C, Yu F, Yu M, Chen S, Fan Q, Xi Y, Duan G. E. coli Enterotoxin LtB Enhances Vaccine-Induced Anti- H. pylori Protection by Promoting Leukocyte Migration into Gastric Mucus via Inflammatory Lesions. Cells 2019; 8:E982. [PMID: 31461854 PMCID: PMC6770474 DOI: 10.3390/cells8090982] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 08/23/2019] [Accepted: 08/23/2019] [Indexed: 12/11/2022] Open
Abstract
Current studies indicate that the anti-H. pylori protective efficacy of oral vaccines to a large extent depends on using mucosal adjuvants like E. coli heat-lable enterotoxin B unit (LtB). However, the mechanism by which Th17/Th1-driven cellular immunity kills H. pylori and the role of LtB remains unclear. Here, two L.lactis strains, expressing H. pylori NapA and LtB, respectively, were orally administrated to mice. As observed, the administration of LtB significantly enhanced the fecal SIgA level and decreased gastric H. pylori colonization, but also markedly aggravated gastric inflammatory injury. Both NapA group and NapA+LtB group had elevated splenocyte production of IL-8, IL-10, IL-12, IL-17, IL-23 and INF-γ. Notably, gastric leukocytes' migration or leakage into the mucus was observed more frequently in NapA+LtB group than in NapA group. This report is the first that discusses how LtB enhances vaccine-induced anti-H. pylori efficacy by aggravating gastric injury and leukocytes' movement into the mucus layer. Significantly, it brings up a novel explanation for the mechanism underlying mucosal cellular immunity destroying the non-invasive pathogens. More importantly, the findings suggest the necessity to further evaluate LtB's potential hazards to humans before extending its applications. Thus, this report can provide considerable impact on the fields of mucosal immunology and vaccinology.
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Affiliation(s)
- Xiaoyan Peng
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
- Department of Basic Medicine, Chuxiong Medical College, Chuxiong 675005, China
| | - Rongguang Zhang
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, China.
| | - Chen Wang
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Feiyan Yu
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Mingyang Yu
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Shuaiyin Chen
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Qingtang Fan
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Yuanlin Xi
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Guangcai Duan
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
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4
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Ma J, Yu L, Song B, Yu Y, Zhang S, Wei Y, Wu Z, Yao D, Yu W, Zhu Z, Cui Y. The double adjuvants LTB and CpG significantly enhanced the immuno-protective effects of recombinant GIT derived from Staphylococcus aureus and Streptococcus in mice. J Med Microbiol 2018; 67:432-440. [PMID: 29458538 DOI: 10.1099/jmm.0.000666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
PURPOSE In this study, we prepared GapC1-150-IsdB126-361-TRAP (GIT) proteins plus heat-labile enterotoxin B (LTB) as an intra-molecular adjuvant, together with CpG to further enhance its immunogenicity. METHODOLOGY Initially, the target genes were acquired and inserted into pET-32a (+) vectors to express LTB-GIT protein. LTB-GIT expression was confirmed by Western blotting and its immunocompetence was estimated through ELISA. Further, we immunized BALB/c mice with the LTB-GIT plus CpG adjuvant. After the second immunization, the antigen-specific CD4+ cell responses for IFN-γ, IL-2, IL-4 and IL-10 were monitored by intracellular cytokine staining (ICS) assay. After the third immunization, the level of IgG antibodies in the serum from immunized groups was assessed by ELISA, and the protective immune response was appraised by Staphylococcus aureus and Streptococcus dysgalactiae challenge. RESULTS The ELISA results showed that the OD450nm value of the LTB-GIT group was significantly higher than that of the BSA group. The group immunized with LTB-GIT plus CpG exhibited significantly stronger CD4+ T cell responses for IFN-γ, IL-2, IL-4 and IL-10 compared to the group immunized with LTB-GIT, GIT alone orLTB-GIT plus CpG. In addition, the group immunized with LTB-GIT plus CpG generated the highest level of IgG antibodies against GIT among all of the groups, and our results also showed that LTB-GIT plus CpG markedly improved the survival percentage of mice compared to other groups. CONCLUSION We confirmed that the novel double adjuvants, LTB and CpG, are able to significantly improve GIT-induced immune responses. This formula could be a promising strategy for enhancing the immune efficacy of multi-subunit vaccines against Staphylococcus aureus and streptococcal infection.
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Affiliation(s)
- Jinzhu Ma
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China.,College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Liquan Yu
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Baifen Song
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Yongzhong Yu
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Shaoduo Zhang
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Yuhua Wei
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Zhijun Wu
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Di Yao
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Wei Yu
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Zhanbo Zhu
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Yudong Cui
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China.,College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
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5
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Cunha CEPD, Moreira C, Rocha ADSR, Finger PF, Magalhães CG, Ferreira MRA, Dellagostin OA, Moreira ÂN, Conceição FR. Parenteral adjuvant potential of recombinant B subunit of Escherichia coli heat-labile enterotoxin. Mem Inst Oswaldo Cruz 2017; 112:812-816. [PMID: 29211241 PMCID: PMC5719549 DOI: 10.1590/0074-02760170133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 07/29/2017] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND The B subunit of Escherichia coli heat-labile enterotoxin
(LTB) is a potent mucosal immune adjuvant. However, there is little
information about LTB's potential as a parenteral adjuvant. OBJECTIVES We aimed at evaluating and better understanding rLTB's potential as a
parenteral adjuvant using the fused R1 repeat of Mycoplasma
hyopneumoniae P97 adhesin as an antigen to characterise the
humoral immune response induced by this construct and comparing it to that
generated when aluminium hydroxide is used as adjuvant instead. METHODS BALB/c mice were immunised intraperitoneally with either rLTBR1 or
recombinant R1 adsorbed onto aluminium hydroxide. The levels of systemic
anti-rR1 antibodies (total Ig, IgG1, IgG2a, and IgA) were assessed by
enzyme-linked immunosorbent assay (ELISA). The ratio of IgG1 and IgG2a was
used to characterise a Th1, Th2, or mixed Th1/Th2 immune response. FINDINGS Western blot confirmed rR1, either alone or fused to LTB, remained antigenic;
anti-cholera toxin ELISA confirmed that LTB retained its activity when
expressed in a heterologous system. Mice immunised with the rLTBR1 fusion
protein produced approximately twice as much anti-rR1 immunoglobulins as
mice vaccinated with rR1 adsorbed onto aluminium hydroxide. Animals
vaccinated with either rLTBR1 or rR1 adsorbed onto aluminium hydroxide
presented a mixed Th1/Th2 immune response. We speculate this might be a
result of rR1 immune modulation rather than adjuvant modulation. Mice
immunised with rLTBR1 produced approximately 1.5-fold more serum IgA than
animals immunised with rR1 and aluminium hydroxide. MAIN CONCLUSIONS The results suggest that rLTB is a more powerful parenteral adjuvant than
aluminium hydroxide when administered intraperitoneally as it induced higher
antibody titres. Therefore, we recommend that rLTB be considered an
alternative adjuvant, even if different administration routes are
employed.
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Affiliation(s)
| | - Clóvis Moreira
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Biotecnologia, Pelotas, RS, Brasil
| | | | - Paula Fonseca Finger
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Biotecnologia, Pelotas, RS, Brasil
| | - Carolina Georg Magalhães
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Biotecnologia, Pelotas, RS, Brasil
| | | | - Odir Antônio Dellagostin
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Biotecnologia, Pelotas, RS, Brasil
| | - Ângela Nunes Moreira
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Biotecnologia, Pelotas, RS, Brasil
| | - Fabricio Rochedo Conceição
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Biotecnologia, Pelotas, RS, Brasil
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Maeda DLNF, Batista MT, Pereira LR, de Jesus Cintra M, Amorim JH, Mathias-Santos C, Pereira SA, Boscardin SB, Silva SDR, Faquim-Mauro EL, Silveira VB, Oliveira DBL, Johnston SA, Ferreira LCDS, Rodrigues JF. Adjuvant-Mediated Epitope Specificity and Enhanced Neutralizing Activity of Antibodies Targeting Dengue Virus Envelope Protein. Front Immunol 2017; 8:1175. [PMID: 28993770 PMCID: PMC5622152 DOI: 10.3389/fimmu.2017.01175] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 09/05/2017] [Indexed: 12/30/2022] Open
Abstract
The heat-labile toxins (LT) produced by enterotoxigenic Escherichia coli display adjuvant effects to coadministered antigens, leading to enhanced production of serum antibodies. Despite extensive knowledge of the adjuvant properties of LT derivatives, including in vitro-generated non-toxic mutant forms, little is known about the capacity of these adjuvants to modulate the epitope specificity of antibodies directed against antigens. This study characterizes the role of LT and its non-toxic B subunit (LTB) in the modulation of antibody responses to a coadministered antigen, the dengue virus (DENV) envelope glycoprotein domain III (EDIII), which binds to surface receptors and mediates virus entry into host cells. In contrast to non-adjuvanted or alum-adjuvanted formulations, antibodies induced in mice immunized with LT or LTB showed enhanced virus-neutralization effects that were not ascribed to a subclass shift or antigen affinity. Nonetheless, immunosignature analyses revealed that purified LT-adjuvanted EDIII-specific antibodies display distinct epitope-binding patterns with regard to antibodies raised in mice immunized with EDIII or the alum-adjuvanted vaccine. Notably, the analyses led to the identification of a specific EDIII epitope located in the EF to FG loop, which is involved in the entry of DENV into eukaryotic cells. The present results demonstrate that LT and LTB modulate the epitope specificity of antibodies generated after immunization with coadministered antigens that, in the case of EDIII, was associated with the induction of neutralizing antibody responses. These results open perspectives for the more rational development of vaccines with enhanced protective effects against DENV infections.
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Affiliation(s)
| | - Milene Tavares Batista
- Vaccine Development Laboratory, Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.,Center for Innovation in Medicine, Biodesign Institute, Arizona State University, Tempe, AZ, United States
| | - Lennon Ramos Pereira
- Vaccine Development Laboratory, Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Mariana de Jesus Cintra
- Vaccine Development Laboratory, Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Jaime Henrique Amorim
- Center of Biological and Health Sciences, Federal University of Western Bahia, Bahia, Brazil
| | - Camila Mathias-Santos
- Vaccine Development Laboratory, Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Sara Araújo Pereira
- Vaccine Development Laboratory, Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Silvia Beatriz Boscardin
- Department of Parasitology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | | | | | - Vanessa Barbosa Silveira
- Clinical and Molecular Virology Laboratory, Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Danielle Bruna Leal Oliveira
- Clinical and Molecular Virology Laboratory, Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Stephen Albert Johnston
- Center for Innovation in Medicine, Biodesign Institute, Arizona State University, Tempe, AZ, United States
| | - Luís Carlos de Souza Ferreira
- Vaccine Development Laboratory, Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Juliana Falcão Rodrigues
- Vaccine Development Laboratory, Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
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7
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Jiang Y, Yang G, Wang Q, Wang Z, Yang W, Gu W, Shi C, Wang J, Huang H, Wang C. Molecular mechanisms underlying protection against H9N2 influenza virus challenge in mice by recombinant Lactobacillus plantarum with surface displayed HA2-LTB. J Biotechnol 2017; 259:6-14. [PMID: 28811215 DOI: 10.1016/j.jbiotec.2017.08.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 07/24/2017] [Accepted: 08/09/2017] [Indexed: 12/29/2022]
Abstract
It has been considered that the Avian influenza virus (AIV) causes severe threats to poultry industry. In this study, we constructed a series of recombinant Lactobacillus plantarum (L. plantarum) with surface displayed hemagglutinin subunit 2 (HA2) alone or together with heat-labile toxin B subunit (LTB) from enterotoxigenic Escherichia coli. Balb/c mice were used as model to evaluate the protective effects of recombinant L. plantarum strains against H9N2 subtype challenge. The results showed that the presence of LTB significantly increased the percentages of CD3+CD4+IL-4+, CD3+CD4+IFN-γ+ and CD3+CD4+IL-17+ T cells, as well as CD3+CD8+IFN-γ+ T cells in spleen and MLNs determined by Fluorescence-Activated Cell Sorting assay. Similar increased production of serum IFN-γ was also confirmed by enzyme linked immunosorbent assay (ELISA). The L. plantarum with surface displayed HA2-LTB also dramatically increased the percentages of B220+ IgA+ B cells in peyer patch, in consistent with elevated production of mucosal SIgA antibody determined by ELISA. Finally, the orally administrated HA2-LTB expressing strain efficiently protected mice against H9N2 subtype AIV challenge shown by increased survival percentages, body weight gains and decreased lung lesions in histopathologic analysis. In conclusion, this study provides more detail mechanisms underlying the adjuvant effects of LTB on heterologous antigen produced in recombinant lactic acid bacteria.
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Affiliation(s)
- Yanlong Jiang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, 130118, China
| | - Guilian Yang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, 130118, China
| | - Qi Wang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, 130118, China
| | - Zhannan Wang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, 130118, China
| | - Wentao Yang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, 130118, China
| | - Wei Gu
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, 130118, China; Shandong Baolai-Leelai Bio-Tech Co., LTD, Taian, Shandong Province, 171000, China
| | - Chunwei Shi
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, 130118, China
| | - Jianzhong Wang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, 130118, China
| | - Haibin Huang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, 130118, China
| | - Chunfeng Wang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, 130118, China.
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8
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Kim B, Won G, Lee JH. Construction of an inactivated typhoid vaccine candidate expressing Escherichia coli heat-labile enterotoxin B subunit and evaluation of its immunogenicity in a murine model. J Med Microbiol 2017; 66:1235-1243. [DOI: 10.1099/jmm.0.000543] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Boram Kim
- College of Veterinary Medicine, Chonbuk National University, Iksan campus, Gobong-ro 79 Iksan, 54596, Republic of Korea
| | - Gayeon Won
- College of Veterinary Medicine, Chonbuk National University, Iksan campus, Gobong-ro 79 Iksan, 54596, Republic of Korea
| | - John Hwa Lee
- College of Veterinary Medicine, Chonbuk National University, Iksan campus, Gobong-ro 79 Iksan, 54596, Republic of Korea
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9
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Bignon A, Watt AP, Linterman MA. Escherichia coli Heat-Labile Enterotoxin B Limits T Cells Activation by Promoting Immature Dendritic Cells and Enhancing Regulatory T Cell Function. Front Immunol 2017; 8:560. [PMID: 28555139 PMCID: PMC5430108 DOI: 10.3389/fimmu.2017.00560] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 04/26/2017] [Indexed: 01/24/2023] Open
Abstract
Treatments to limit T cell activation are essential for managing autoimmune and inflammatory disorders. The B subunit of Escherichia coli heat-labile enterotoxin (EtxB) is known to ameliorate inflammatory disease in vivo but the mechanism by which this is mediated is not well understood. Here, we show that following intranasal administration, EtxB acts on two key cellular regulators of T cell activation: regulatory T cells and dendritic cells (DCs). EtxB enhances the proliferation of lung regulatory T cells and doubles their suppressive function, likely through an increase in expression of the Treg effector molecule CTLA-4. EtxB supports the generation of interleukin-10-producing DCs that are unable to activate T cells. These data show, for the first time, that mucosal EtxB treatment limits T cells activation by acting jointly on two distinct types of immune cells.
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Affiliation(s)
- Alexandre Bignon
- Lymphocyte Signalling and Development, Babraham Institute, Babraham Research Campus, Cambridge, UK
| | - Alan P Watt
- Xenovium Limited, Chesterford Research Park, Little Chesterford, UK
| | - Michelle A Linterman
- Lymphocyte Signalling and Development, Babraham Institute, Babraham Research Campus, Cambridge, UK
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10
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Ma Y. Recent advances in nontoxicEscherichia coliheat-labile toxin and its derivative adjuvants. Expert Rev Vaccines 2016; 15:1361-1371. [DOI: 10.1080/14760584.2016.1182868] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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