Development of new technology allows different antigens of a necessary degree of cleanliness to be obtained. This development is a major problem of modern medical biotechnology. A promising approach to this problem includes use of the affinity domains (tags) incorporated in structure of a recombinant antigen and capable to bind to corresponding sorbents. The method of preparation of ready-for-use injections containing complexes formed by soluble antigens on insoluble cellulose immunosorbent (not chemical conjugates) in one stage is based on the fusion protein technology. This approach includes preparation of two-component recombinant proteins containing an antigen of interest and the cellulose-binding domain (CBD), which spontaneously binds to cellulose containing sorbents with high binding constant. Research into the immunogenic properties of the CBD in the complex with cellulose and in the preparation of recombinant CBD in a rat model was performed. The titers of specific antibodies in rat serum induced by recombinant CBD and CBD in the complex with cellulose was evaluated. The CBD in the complex with cellulose was more immunogenic in comparison with CBD alone. The spectrum and levels of cytokines in collected rat serum induced by developed preparations was also measured using the microsphere-based Luminex Flowmetrix system (BioPlex). It was found that the amorphous cellulose was not an immunotolerant sorbent, because it induced the expression of the proinfammatory cytokines in vivo.
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