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Iranian Journal of Allergy, Asthma and Immunology، جلد ۱۸، شماره ۴، صفحات ۴۲۷-۴۴۰
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عنوان انگلیسی Functional Deimmunization of Interferon Beta-1b by Identifying and Silencing Human T Cells Epitopes
چکیده انگلیسی مقاله Interferonbeta-1b (IFNβ-1b) developed as therapeutic protein for the treatment of multiple sclerosis (MS). Studies have been shown that Long-term usage of this protein can lead to the development of anti-drug antibodies (ADAs) and this phenomenon cause total loss or reduced efficacy of IFNβ-1b. The aim of this study was to predict and silence IFNβ-1b T-cells epitopes by in silico methods and genetic engineering. Based on bioinformatics studies we identified optimal sets of conservative point mutations for eliminating T-cells epitopes in IFNβ-1b protein. Four synthetic genes with desirable mutation constructed and PET26b+ was used as an expression vector in E. coli. The expression of this proteins confirmed by SDS-PAGE and Western blotting, consequently, IFNβ-1b proteins was purified by His-tag chromatography. To determined activity of mutants’ variants anti-proliferative and anti-viral activity compared to wild form was evaluated using MTT assay in A549 and Vero cells lines respectively. Also the immunogenicity of mutant proteins compared with Betaseron measured in BALB/c mice. The in vitro bioactivity analysis demonstrated that functional activities of all mutant proteins were maintained and is the same as biological activity of Betaseron. Pharmacokinetic studies suggest that, in engineered proteins that contain substitution of Histidine to Glutamic Acid at position 131 (mut 2 and mut 1+2) antibodies response reduced by about 50%, as compared to that for Betaseron. Computational analysis expedites identification and prediction of epitopes in therapeutic protein, therefore, we used immunoinformatic tools for modification of dominant T-cell epitope in IFNβ-1b protein, and this strategy has capacity to create proteins which have naturally reduced immunogenicity.
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نویسندگان مقاله | Amin Moradi Hasan-Abad
Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran


| Elham Adabi
Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran


| Esmaeil Sadroddiny
Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran


| Mohammad Reza Khorramizadeh
Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran


| Mohammad Ali Mazlomi
Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran


| Saeed Mehravar
Department of Epidemiology and Statistics, School of Public Health, Tehran University of Medical Science, Tehran, Iran


| Gholam Ali Kardar
Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran AND Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran
نشانی اینترنتی http://ijaai.tums.ac.ir/index.php/ijaai/article/view/2192
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/89/article-89-1823867.pdf
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