A STRATEGY FOR DIRECT DELIVERY OF ANTIGENIC CONSTRUCTS TO DENDRITIC CELL RECEPTORS

Objective

C-type lectin receptors (CLRs) expressed by DC are considered attractive targets for effective targeting of antigen to antigen-presenting cells, since the participation of CLRs can additionally stimulate antigen presentation and, accordingly, subsequent activation of T cells. To study the ability of DC to enhance antigen capture and presentation using a library of fluorescein-labeled polyacrylamide glycoconjugates.

Methodology

DC was obtained by culturing human peripheral blood monocytes in a complete RPMI-1640 nutrient medium containing GM-CSF, IL-4 and TNFa. Immunophenotypes were analyzed using flow cytometric analysis. In our study, synthetic FSL (Function-Spacer-Lipid) constructs will be used: polyacrylamide glycoconjugate (Adi-sp)3-βDD-PAA-Fluo, conjugate N-acetyllactosamine, glycolipid (Adi-sp)3-βDD ((Adi-sp)3-βDD-DOPE). Next, the binding of these cells to glycoprobes was investigated.

Results

A new class of glycoconjugates specific for binding to C-type lectin receptors has been synthesized. The key cytokines for the cultivation of DC are GM-CSF (final concentration 80 ng/ml), IL-4 (final concentration 10 ng/ml), as well as differentiation inducers: TNF-α, PGE2. Mapping of human blood cells using a library of fluorescein-labeled polyacrylamide glycoconjugates showed that the studied glycoprobes bind to more than 15% of the human leukocyte population.

Conclusion

In our proposed research project, a new approach will be used to study the strategy of enhancing the capture and presentation of antigen by dendritic cells by targeting C-type lectin receptors.