Immunogenicity of inactivated Escherichia coli O157:H7 with Stx2B microparticle in mice
Objective(s): Vaccination using inactivated bacteria is one of the most effective ways to protect against EHEC infection. Escherichia coli O157:H7 infections are mainly influenced by Shiga toxins (Stx) and attaching/effacing factors. Among various factors, Stx2B is gaining much attention as a vaccin...
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| Format: | Article |
| Language: | English |
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Mashhad University of Medical Sciences
2022-09-01
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| Series: | Iranian Journal of Basic Medical Sciences |
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| Online Access: | https://ijbms.mums.ac.ir/article_20903_3174b4ac2590278fac5695a59e94b9b6.pdf |
| _version_ | 1811192529666703360 |
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| author | Nasim Arshadi Seyed Latif Mousavi Gargari Jafar Amani Shahram Nazarian |
| author_facet | Nasim Arshadi Seyed Latif Mousavi Gargari Jafar Amani Shahram Nazarian |
| author_sort | Nasim Arshadi |
| collection | DOAJ |
| description | Objective(s): Vaccination using inactivated bacteria is one of the most effective ways to protect against EHEC infection. Escherichia coli O157:H7 infections are mainly influenced by Shiga toxins (Stx) and attaching/effacing factors. Among various factors, Stx2B is gaining much attention as a vaccine candidate. Formulating an inactivated bacteria with a suitable adjuvant increases vaccine efficacy and antibody production and can lead to a lasting immune response and protection against O157:H7. Materials and Methods: To assess vaccine efficacy, in this study, we have considered heat and formalin-inactivated bacteria along with chitosan-coated Stx2B/ Stx2B in a mouse model. Ionotropic gelation via tripolyphosphate anions was used to coat Stx2B on chitosan. Subcutaneous injection or oral gavage was used to immunize mice, which were then challenged with E. coli O157:H7. Results: Immunity and protection against E. coli O157:H7 were achieved by all forms of the vaccine. Inactivated E. coli O157:H7 formulated with chitosan-coated Stx2B effectively evoked humoral and mucosal immune responses. However, minimum shedding appeared with the mice groups orally immunized with formalin-inactivated bacteria sublimated with chitosan-coated Stx2B and heat-inactivated bacteria plus Stx2B in subcutaneous immunization.Conclusion: Administration of inactivated whole-cell and toxin was synergistic and increased the protection capacity with both parenteral and oral immunization routes. |
| first_indexed | 2024-04-11T23:54:07Z |
| format | Article |
| id | doaj.art-6bf4f3e489a641be8f28ed2e82f96791 |
| institution | Directory Open Access Journal |
| issn | 2008-3866 2008-3874 |
| language | English |
| last_indexed | 2024-04-11T23:54:07Z |
| publishDate | 2022-09-01 |
| publisher | Mashhad University of Medical Sciences |
| record_format | Article |
| series | Iranian Journal of Basic Medical Sciences |
| spelling | doaj.art-6bf4f3e489a641be8f28ed2e82f967912022-12-22T03:56:24ZengMashhad University of Medical SciencesIranian Journal of Basic Medical Sciences2008-38662008-38742022-09-012591069107610.22038/ijbms.2022.63775.1405320903Immunogenicity of inactivated Escherichia coli O157:H7 with Stx2B microparticle in miceNasim Arshadi0Seyed Latif Mousavi Gargari1Jafar Amani2Shahram Nazarian3Department of Biology, Faculty of Basic Sciences, Shahed University, Tehran, IranDepartment of Biology, Faculty of Basic Sciences, Shahed University, Tehran, IranApplied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, IranDepartment of Biology, Imam Hussein University, Tehran, IranObjective(s): Vaccination using inactivated bacteria is one of the most effective ways to protect against EHEC infection. Escherichia coli O157:H7 infections are mainly influenced by Shiga toxins (Stx) and attaching/effacing factors. Among various factors, Stx2B is gaining much attention as a vaccine candidate. Formulating an inactivated bacteria with a suitable adjuvant increases vaccine efficacy and antibody production and can lead to a lasting immune response and protection against O157:H7. Materials and Methods: To assess vaccine efficacy, in this study, we have considered heat and formalin-inactivated bacteria along with chitosan-coated Stx2B/ Stx2B in a mouse model. Ionotropic gelation via tripolyphosphate anions was used to coat Stx2B on chitosan. Subcutaneous injection or oral gavage was used to immunize mice, which were then challenged with E. coli O157:H7. Results: Immunity and protection against E. coli O157:H7 were achieved by all forms of the vaccine. Inactivated E. coli O157:H7 formulated with chitosan-coated Stx2B effectively evoked humoral and mucosal immune responses. However, minimum shedding appeared with the mice groups orally immunized with formalin-inactivated bacteria sublimated with chitosan-coated Stx2B and heat-inactivated bacteria plus Stx2B in subcutaneous immunization.Conclusion: Administration of inactivated whole-cell and toxin was synergistic and increased the protection capacity with both parenteral and oral immunization routes.https://ijbms.mums.ac.ir/article_20903_3174b4ac2590278fac5695a59e94b9b6.pdfchitosanescherichia coli o157:h7inactivated vaccineoral vaccineshiga toxin |
| spellingShingle | Nasim Arshadi Seyed Latif Mousavi Gargari Jafar Amani Shahram Nazarian Immunogenicity of inactivated Escherichia coli O157:H7 with Stx2B microparticle in mice Iranian Journal of Basic Medical Sciences chitosan escherichia coli o157:h7 inactivated vaccine oral vaccine shiga toxin |
| title | Immunogenicity of inactivated Escherichia coli O157:H7 with Stx2B microparticle in mice |
| title_full | Immunogenicity of inactivated Escherichia coli O157:H7 with Stx2B microparticle in mice |
| title_fullStr | Immunogenicity of inactivated Escherichia coli O157:H7 with Stx2B microparticle in mice |
| title_full_unstemmed | Immunogenicity of inactivated Escherichia coli O157:H7 with Stx2B microparticle in mice |
| title_short | Immunogenicity of inactivated Escherichia coli O157:H7 with Stx2B microparticle in mice |
| title_sort | immunogenicity of inactivated escherichia coli o157 h7 with stx2b microparticle in mice |
| topic | chitosan escherichia coli o157:h7 inactivated vaccine oral vaccine shiga toxin |
| url | https://ijbms.mums.ac.ir/article_20903_3174b4ac2590278fac5695a59e94b9b6.pdf |
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