An optimized protocol for the expression of a recombinant protein fragment of human factor B used for the production of polyclonal antibodies
Sultan, E., Rizk, D., Hassan, R., Kenawy, H. (2024). An optimized protocol for the expression of a recombinant protein fragment of human factor B used for the production of polyclonal antibodies. EKB Journal Management System, 33(3), 141-151. doi: 10.21608/ejmm.2024.301876.1272
Enas Y. Sultan; Dina E. Rizk; Ramadan Hassan; Hany I. Kenawy. "An optimized protocol for the expression of a recombinant protein fragment of human factor B used for the production of polyclonal antibodies". EKB Journal Management System, 33, 3, 2024, 141-151. doi: 10.21608/ejmm.2024.301876.1272
Sultan, E., Rizk, D., Hassan, R., Kenawy, H. (2024). 'An optimized protocol for the expression of a recombinant protein fragment of human factor B used for the production of polyclonal antibodies', EKB Journal Management System, 33(3), pp. 141-151. doi: 10.21608/ejmm.2024.301876.1272
Sultan, E., Rizk, D., Hassan, R., Kenawy, H. An optimized protocol for the expression of a recombinant protein fragment of human factor B used for the production of polyclonal antibodies. EKB Journal Management System, 2024; 33(3): 141-151. doi: 10.21608/ejmm.2024.301876.1272

An optimized protocol for the expression of a recombinant protein fragment of human factor B used for the production of polyclonal antibodies

Egyptian Journal of Medical Microbiology
Volume 33, Issue 3, July 2024, Page 141-151  XML PDF (762.98 K)
Document Type: New and original researches in the field of Microbiology.
DOI: 10.21608/ejmm.2024.301876.1272
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Authors
Enas Y. Sultan; Dina E. Rizk; Ramadan Hassan; Hany I. Kenawy email orcid
Department of Microbiology & Immunology, Faculty of Pharmacy, Mansoura University; Egypt
Abstract
Background: Complement is a critical component of the innate immunity bridging both arms of the immune system. Extensive trials are ongoing to develop therapeutics that target complement and hence alleviating complement-mediated disorders. Objectives: Here, we detail our attempts to express a recombinant protein fragment of human factor B (FBfr) in a high yield and solubility in addition to the production of polyclonal antibody against it. Methodology: We tested different expression conditions and host strains to express FBfr. Moreover, we used the expressed Fbfr to immunize rabbits for production of polyclonal antibody and tested its inhibitory properties against the alternative pathway by in vitro assays. Results: We successfully expressed an alternative complement pathway inhibitor FBfr in E. coli using an optimized protocol. The protein was antigenic and led to the production of a high titer of antibodies in sera of the immunized rabbits. The polyclonal antibody was shown to have a moderate inhibition of the alternative complement pathway activity. Conclusion: optimization of expression parameters can greatly improve the expression levels of recombinant proteins. These proteins can have a functional activity and be used for successful immunization process.
Keywords
alternative pathway; complement; factor B; factor B fragment; inhibitor
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