Designing a R ecombinant Vaccine Containing Three Bacterial Proteins of EHEC, ETEC, and shigella Dysentery Antigens in E. coli and Evaluation of its Humoral Immunity in Mic
Author(s):
Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
Background and
Purpose
Different genera of enterobacteriaceae have important roles in gastrointestinal diseases such as diarrhea. Among these, Enterotoxigenic E. coli (ETEC), enterohemorrhagic E. coli (EHEC), and Shigella are three main bacteria which are transmitted via contaminated food and water. Vaccination is a good strategy to combat these pathogens. In the present study, a chimeric antigen, containing the main antigens of these three bacteria was designed, expressed in E. coli host, and tested for protection against EHEC strain.Materials And Methods
Specific primers were designed to fuse these antigens. The properties of the chimeric antigen, including physical and chemical properties, secondary and tertiary structures, and B cell and T cell epitopes were obtained via in silico analysis. After the fusion of the genes, the resulting recombinant pET28a() vector was transferred into the competent E. coli cells. Expression was induced and the protein was purified. Then, the animals were immunized through subcutaneous administration of the antigen. Finally, the immunized animals were challenged by live E. coli O157:H7 cells.Results
In silico analysis showed that the chimeric antigen had appropriate physical and chemical properties which could be expressed in various expression systems. In addition, the antigen has potent B- and T-cell epitopes. Experimental results showed that the antigen has efficiently provoked the mice's humoral immune system. Challenging the immunized mice by live bacterial cells showed that the chimeric antigen was able to protect the mice against E. coli O157:H7 strain.Conclusion
Both in silico analysis and experimental results showed that the chimeric antigen has appropriate properties which can be considered as a proper candidate vaccine against the three bacteria mentioned. Keywords:
Language:
Persian
Published:
Journal of Mazandaran University of Medical Sciences, Volume:27 Issue: 157, 2018
Pages:
1 to 16
magiran.com/p1791953
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!