Preparation of chitosan nanoparticle containing recombinant StxB antigen of EHEC and evaluation its immunogenicity in BALB/c mice

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Almasian Pegah; AMANI JAFAR; Baghbani Arani Fahimeh; NAZARIAN SHAHRAM; KAZEMI ROUHOLLAH; Mirzaee Tabrizi Niloufar

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Journal Paper

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Journal: Iranian Journal of Microbiology Year:2018 | Volume:10 | Issue:6 Page(s): 361-370

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Title

Preparation of chitosan nanoparticle containing recombinant StxB antigen of EHEC and evaluation its immunogenicity in BALB/c mice

Author(s)

Keywords

Enterohemorrhagic

Escherichia coli

Stx2B subunit

Nanoparticle chitosan

Subunit vaccine

Abstract

Background and Objectives: Escherichia coli O157: H7 is one of the most important food pathogens that produces colitis and bloody urine in humans. The Stx2B subunit is considered as one of the candidates for vaccine due to its immunogenic and adjuvant properties. Designing a mucosal vaccine using nanoparticles for protecting the antigen against degradation and controlling the release of antigen are important. The objective of the current study was to prepare nanoparticles containing the Stx2B subunit of E. coli O157: H7 and evaluation of its immunogenicity in the mouse model. Materials and Methods: E. coli BL21 DE3 and pET28a-stxB were used for expression of the stx2b gene. After inducing gene expression, purification of the Stx2b protein was performed. Then, chitosan nanoparticle containing recombinant Stx2B was prepared and administered to BALB/c mice. IgA and IgG titers in serum and IgA titers in feces of immunized and control mice were evaluated by the ELISA method. Results: After expression and purification of the Stx2B recombinant protein, an expected band of 13 kDa was observed on the SDS-PAGE gel and confirmed by Western Blot analysis. The size of the nanoparticle containing Stx2B was 290 nm. In the immunized mice, IgG and IgA titers were significantly increased. The immunized mice were challenged against E. coli O157: H7 Stx+ and the shedding analysis showed that colonization of bacteria in the intestinal tract decreased. Conclusion: Oral administration of nanoparticles containing Stx2B as a candidate for the vaccine can induce a systemic and mucosal immune response against Stx2 toxin and can provide acceptable protection.

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APA: Copy

Almasian, Pegah, AMANI, JAFAR, Baghbani Arani, Fahimeh, NAZARIAN, SHAHRAM, Mirzaee Tabrizi, Niloufar, & KAZEMI, ROUHOLLAH. (2018). Preparation of chitosan nanoparticle containing recombinant StxB antigen of EHEC and evaluation its immunogenicity in BALB/c mice. IRANIAN JOURNAL OF MICROBIOLOGY, 10(6), 361-370. SID. https://sid.ir/paper/756724/en

Vancouver: Copy

Almasian Pegah, AMANI JAFAR, Baghbani Arani Fahimeh, NAZARIAN SHAHRAM, Mirzaee Tabrizi Niloufar, KAZEMI ROUHOLLAH. Preparation of chitosan nanoparticle containing recombinant StxB antigen of EHEC and evaluation its immunogenicity in BALB/c mice. IRANIAN JOURNAL OF MICROBIOLOGY[Internet]. 2018;10(6):361-370. Available from: https://sid.ir/paper/756724/en

IEEE: Copy

Pegah Almasian, JAFAR AMANI, Fahimeh Baghbani Arani, SHAHRAM NAZARIAN, Niloufar Mirzaee Tabrizi, and ROUHOLLAH KAZEMI, “Preparation of chitosan nanoparticle containing recombinant StxB antigen of EHEC and evaluation its immunogenicity in BALB/c mice,” IRANIAN JOURNAL OF MICROBIOLOGY, vol. 10, no. 6, pp. 361–370, 2018, [Online]. Available: https://sid.ir/paper/756724/en

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