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Exploiting lymphatic transport and complement activation in nanoparticle vaccines

Abstract

Antigen targeting1,2,3,4,5 and adjuvancy schemes6,7 that respectively facilitate delivery of antigen to dendritic cells and elicit their activation have been explored in vaccine development. Here we investigate whether nanoparticles can be used as a vaccine platform by targeting lymph node–residing dendritic cells via interstitial flow and activating these cells by in situ complement activation. After intradermal injection, interstitial flow transported ultra-small nanoparticles (25 nm) highly efficiently into lymphatic capillaries and their draining lymph nodes, targeting half of the lymph node–residing dendritic cells, whereas 100-nm nanoparticles were only 10% as efficient. The surface chemistry of these nanoparticles activated the complement cascade, generating a danger signal in situ and potently activating dendritic cells. Using nanoparticles conjugated to the model antigen ovalbumin, we demonstrate generation of humoral and cellular immunity in mice in a size- and complement-dependent manner.

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Figure 1: Ultra-small nanoparticles accumulate in lymph nodes after intradermal injection, whereas slightly larger ones do not.
Figure 2: Polyhydroxylated nanoparticle surfaces activate complement.
Figure 3: Lymph node-targeting, complement-activating nanoparticles induce dendritic cell maturation in vivo.
Figure 4: Lymph node–targeting, complement-activating nanoparticles induce antigen-specific adaptive immune responses.

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Acknowledgements

We thank M. Pasquier, V. Borel, V. Garea for valuable technical assistance; J.M. Rutkowski for scientific discussions; J.B. Dixon for MATLAB programming. Project funded by the Competence Centre for Materials Science and Technology (CCMX) of the ETH-Board, Switzerland (to M.A.S. and J.A.H.).

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Contributions

S.T.R. designed and performed the research, analyzed the data and wrote the manuscript; A.J.v.d.V. synthesized materials and analyzed synthetic data; E.S. developed methods on T-cell activation and analyzed the data; V.A. performed the research on T-cell adoptive transfer, analyzed the data and provided useful discussion on interpretation; G.J.R. analyzed the data and provided useful discussion on interpretation; C.P.O. synthesized materials and analyzed synthetic data; L.K.L. developed methods on T-cell activation and antibody titer measurement; M.A.S. designed the research, analyzed the data and wrote the manuscript; J.A.H. designed the research, analyzed the data and wrote the manuscript.

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Correspondence to Melody A Swartz or Jeffrey A Hubbell.

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Competing interests

The Ecole Polytechnique Fédérale de Lausanne has filed a patent application on technology related to this manuscript, and S.T.R., A.J.v.d.V, M.A.S. and J.A.H. are named as inventors on this application.

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Supplementary Figures 1–4; Supplementary Methods (PDF 428 kb)

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Reddy, S., van der Vlies, A., Simeoni, E. et al. Exploiting lymphatic transport and complement activation in nanoparticle vaccines. Nat Biotechnol 25, 1159–1164 (2007). https://doi.org/10.1038/nbt1332

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