Dengue virus type-۳ envelope protein domain III; expression and immunogenicity
Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJBMS-17-11_003
تاریخ نمایه سازی: 4 آبان 1400
Abstract:
Objective(s): Production of a recombinant and immunogenic antigen using dengue virus type-۳ envelope protein is a key point in dengue vaccine development and diagnostic researches. The goals of this study were providing a recombinant protein from dengue virus type-۳ envelope protein and evaluation of its immunogenicity in mice. Materials and Methods: Multiple amino acid sequences of different isolates of dengue virus type-۳, corresponding to the envelope protein domain III, were achieved from GenBank. Clustal V alignment tool was used to provide a consensus amino acid sequence. Nucleotide sequence of the coding gene was optimized using “Optimizer”. The origami (DE۳) strain of Escherichia coli was used as the host in order to express the protein. A commercial affinity chromatography method was used to purify the recombinant protein. Immunogenicity of the recombinant protein was evaluated in mice using ELISA, MTT and cytokine assays. Results: A consensus amino acid sequence corresponding to the most important region of dengue virus type-۳ envelope protein (domain III) was provided. A high concentration (≥ ۲۰ mg/L culture medium) of soluble recombinant antigen (EDIII۳) was achieved. Immunized mice developed specific antibody responses against EDIII۳ protein. The splenocytes from EDIII۳-immunized mice showed a high proliferation rate in comparison with the negative control. In addition, the concentrations of two measured cytokines (IFN-γ and IL-۴) were increased markedly in immunized mice. Conclusion: The results showed that the expressed recombinant EDIII۳ protein is an immunogenic antigen and can be applied to induce specific immune responses against dengue virus type-۳.
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Authors
Hossein Fahimi
Department of Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran ۲ Department of Cellular and Molecular Biology, Islamic Azad University, Pharmaceutical Sciences Branch (IAUPS), Tehran, Iran
Hossein Allahyari
Department of Immunology, Faculty of Medical Sciences, Tehran Medical University, Tehran, Iran
Zuhair M Hassan
Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
Majid Sadeghizadeh
Department of Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
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