Highly aggregated antibody therapeutics can enhance the in vitro innate and late-stage T-cell immune responses.

The Journal of Biological Chemistry
Marisa K JoubertVibha Jawa

Abstract

Aggregation of biotherapeutics has the potential to induce an immunogenic response. Here, we show that aggregated therapeutic antibodies, previously generated and determined to contain a variety of attributes (Joubert, M. K., Luo, Q., Nashed-Samuel, Y., Wypych, J., and Narhi, L. O. (2011) J. Biol. Chem. 286, 25118-25133), can enhance the in vitro innate immune response of a population of naive human peripheral blood mononuclear cells. This response depended on the aggregate type, inherent immunogenicity of the monomer, and donor responsiveness, and required a high number of particles, well above that detected in marketed drug products, at least in this in vitro system. We propose a cytokine signature as a potential biomarker of the in vitro peripheral blood mononuclear cell response to aggregates. The cytokines include IL-1β, IL-6, IL-10, MCP-1, MIP-1α, MIP-1β, MMP-2, and TNF-α. IL-6 and IL-10 might have an immunosuppressive effect on the long term immune response. Aggregates made by stirring induced the highest response compared with aggregates made by other methods. Particle size in the 2-10 μm range and the retention of some folded structure were associated with an increased response. The mechanism of aggregate activation at...Continue Reading

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Methods Mentioned

BETA
in silico methods
enzyme-linked immunosorbent spot
Assay

Software Mentioned

Immunoscan Analyzer
Immunoscan

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