Add time:08/28/2019         Source:sciencedirect.com

Hemagglutinin (HA) displayed on a ferritin nano-cage has been shown to be effective in generating a potent immune response against a broad range of influenza infections. Here, we showed that conjugation of FLAGELLIN (cas 12777-81-0) together with HA to the exterior surface of the ferritin cage greatly enhanced not only the humoral immune response in mice but also antigen-specific T cell responses that include Th1 cytokine secretion. The effect of flagellin remained essentially unchanged when the molar ratio of flagellin to HA was reduced from 1:1 to 1:3. Injection of the ferritin-HA-flagellin cage provided protection against lethal virus challenge in mice. We used a small immunoglobulin fragment VL12.3 as a convenient method for attaching HA and flagellin to the ferritin cage. This attachment method can be used for rapid screening of a variety of protein cages and nano-assemblies to identify the most suitable carrier and adjuvant proteins for the target antigen.

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