Immunogenicity of heparin-binding hemagglutinin expressed by Pichia pastoris GS۱۱۵ strain

سال انتشار: 1397
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 143

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شناسه ملی سند علمی:

JR_IJBMS-21-2_015

تاریخ نمایه سازی: 27 مهر 1400

چکیده مقاله:

Objective(s): Heparin-binding hemagglutinin (HBHA), a mycobacterial cell surface protein, mediates adhesion to nonphagocytic cells and the dissemination of Mycobacterium tuberculosis (M. tuberculosis) from the site of primary infection. Superior expression systems are required to obtain abundant M. tuberculosis proteins for the purpose of diagnosing M. tuberculosis infection or for the immunization. Here,  HBHA was expressed by Pichia pastoris (P. pastoris) GS۱۱۵ strain , and the  immunogenicity of  HBHA was evaluated. Materials and Methods: The HBHA gene of M. tuberculosis was cloned into the pPIC۹K plasmid, which was good for electroporation into P. pastoris GS۱۱۵ strain. Unlabeled HBHA protein was purified using a Sepharose CL-۶B column, and its expression was confirmed using anti-HBHA polyclonal antibody from mouse serum. We injected C۵۷BL/۶ mice with HBHA/ dimethyldioctadecylammonium/trehalose ۶,۶′-dibehenate (HBHA/DDA/TDB) to investigate the immunogenicity of this potential vaccine. Results: The results demonstrated that HBHA/DDA/TDB has the ability to induce high levels of HBHA-specific IgG antibody and its subclasses, as well as interferon-gamma, compared with injection of phosphate-buffered saline, DDA/TDB alone and Bacillus Calmette-Guérin (BCG) controls (P<۰.۰۵). Moreover, the ratio of IgG۲a/IgG۱ of the HBHA/DDA/TDB group was higher than that of the BCG group (P<۰.۰۵). Conclusion: HBHA with no label has excellent immunogenicity, and is suitable for evaluating the effectiveness to prevent M. tuberculosis infection.

نویسندگان

Xindong Teng

Department of Clinical Laboratory, Shandong International Travel Healthcare Center, Qingdao, China

Xiaoguang Chen

Department of Clinical Laboratory, Shandong International Travel Healthcare Center, Qingdao, China

Ke Zhu

Department of Clinical Laboratory, Shandong International Travel Healthcare Center, Qingdao, China

Hefei Xu

Department of Clinical Laboratory, Shandong International Travel Healthcare Center, Qingdao, China

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