طراحی بیوانفورماتیکی آنتی‌ژن چند اپی‌توپی باکتری های بروسلا ملیتنسیس و بروسلا آبورتوس به منظور تشخیص بیماری بروسلوزیس در انسان

نوع مقاله : مقاله پژوهشی

نویسندگان
1 گروه بیوتکنولوژی پزشکی، دانشکده علوم و فناوری های نوین پزشکی، دانشگاه علوم پزشکی شیراز، شیراز، ایران
2 مرکز تحقیقات بیماری‌های غیرواگیر، دانشگاه علوم پزشکی جهرم، جهرم، ایران
چکیده
مقدمه: بروسلوزیس یکی از شایع‌ترین بیماری‌های مشترک بین انسان و دام در سراسر جهان است که علاوه بر ایجاد خسارت‌های مالی متعدد در صنعت دام،  سلامت انسان را نیز به خطر می‌اندازد. امروزه آنتی‌ژن‌های چند ‌اپی‌توپی، به دلیل بالا بودن حساسیت و ویژگی در راندمان تشخیص و همچنین کم بودن هزینه تولید در مقایسه با آنتی‌ژن‌های منفرد در روش‌های تشخیص سرولوژیک به ‌ویژه الایزا، کاربرد زیادی دارند. از این رو مطالعه حاضر با هدف طراحی بیوانفورماتیکی آنتی ژن چند اپی توپی به منظور تشخیص بروسلوزیس انسانی انجام شد.
روش کار: به منظور طراحی آنتی‌ژن چند ‌اپی‌توپی، از آنتی‌ژن‌های Omp25، Omp16 و BP26 استفاده شد. پس از شناسایی اپی‌توپ‌ها با ویژگی آنتی‌ژنی بالا از هر آنتی‌ژن، اپی‌توپ‌ها توسط اتصال دهنده مناسب (EAAAK) به یکدیگر متصل شدند. سپس خواص فیزیکوشیمیایی و آنتی‌ژنی آن ها مورد بررسی قرار گرفت. در ادامه پیش‌بینی ساختار سه بعدی و اعتبارسنجی ساختار ذکر شده، ارزیابی شد. پس از تبدیل توالی آمینواسـیدی آنتی‌ژن چند اپی‌توپی به توالی نوکلئیک اسید، بهینه‌سازی توالی انجام گرفت و در وکتور PET23a( +) وارد شد.
یافته ها: نتایج حاصل از بررسی‌های بیوانفورماتیک نشان داد آنتی‌ژن چند اپی‌توپی طراحی شده، پایدار، دارای قابلیت انحلال و آنتی ژنیسیته ی قابل توجه است.
نتیجه گیری: یافته های ما نشان می دهد که آنتی ژن چند اپی توپی طراحی شده می تواند یک گزینه امیدوار کننده به منظور تشخیص بروسلوزیس در نظر گرفته شود، با این حال، برای تایید کارآیی آن، نیاز به اعتبارسنجی بیشتر از طریق روش های آزمایشگاهی وجود دارد.
کلیدواژه‌ها

عنوان مقاله English

Bioinformatic design of multi-epitope antigens of Brucella melitensis and Brucella abortus to diagnose brucellosis in humans

نویسندگان English

Marzieh Asadi 1
Maryam Baneshi 1
Asma Vafadar 1
Hossein kargar jahromi 2
Amir Savardashtaki 1
1 Department of Medical Biotechnology, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
2 Research center for Noncommunicable Diseases, Jahrom University of Medical Sciences, Jahrom, Iran
چکیده English

Introduction: Brucellosis is one of the most common zoonotic diseases worldwide, posing a significant threat to both human health and the livestock industry, causing substantial economic losses. Today, multi-epitope antigens are widely used in serological diagnostic methods, especially ELISA, due to their high sensitivity and specificity in diagnostic efficiency and lower production costs compared to single antigens. Therefore, this study aimed to design a bioinformatic multi-epitope antigen for the diagnosis of human brucellosis.
Materials and Methods: To design the multi-epitope antigen, Omp16, Omp25, and BP26 antigens were utilized. After identifying epitopes with high antigenic properties from each antigen, the epitopes were linked using an appropriate linker (EAAAK). The physicochemical properties and antigenicity of the designed antigen were then assessed. Subsequently, the threedimensional (3D) structure was predicted and validated. The amino acid sequence of the multiepitope antigen was converted to a nucleotide sequence, optimized, and inserted into the pET23a (+) vector.
Results: Bioinformatic analyses indicated that the designed multi-epitope antigen is stable, soluble, and possesses significant antigenicity.
Conclusion: Our findings suggest that the designed multi-epitope antigen could be a promising candidate for the diagnosis of brucellosis. However, further validation through laboratory methods is necessary to confirm its diagnostic efficacy.

کلیدواژه‌ها English

Multi-epitope antigens
Bioinformatics
Serological diagnosis
Brucellosis
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