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. 2018 Nov;142(5):1558-1570.
doi: 10.1016/j.jaci.2017.08.049. Epub 2018 Jan 31.

Protein corona-mediated targeting of nanocarriers to B cells allows redirection of allergic immune responses

Limei Shen  1 , Stefan Tenzer  2 , Wiebke Storck  2 , Dominika Hobernik  1 , Verena Katherina Raker  1 , Karl Fischer  3 , Sandra Decker  3 , Andrzej Dzionek  4 , Susanne Krauthäuser  4 , Mustafa Diken  5 , Alexej Nikolaev  6 , Joachim Maxeiner  7 , Petra Schuster  7 , Cinja Kappel  1 , Admar Verschoor  8 , Hansjörg Schild  2 , Stephan Grabbe  9 , Matthias Bros  1
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Free article

Protein corona-mediated targeting of nanocarriers to B cells allows redirection of allergic immune responses

Limei Shen et al. J Allergy Clin Immunol. 2018 Nov.
Free article

Abstract

Background: Nanoparticle (NP)-based vaccines are attractive immunotherapy tools because of their capability to codeliver antigen and adjuvant to antigen-presenting cells. Their cellular distribution and serum protein interaction ("protein corona") after systemic administration and their effect on the functional properties of NPs is poorly understood.

Objectives: We analyzed the relevance of the protein corona on cell type-selective uptake of dextran-coated NPs and determined the outcome of vaccination with NPs that codeliver antigen and adjuvant in disease models of allergy.

Methods: The role of protein corona constituents for cellular binding/uptake of dextran-coated ferrous nanoparticles (DEX-NPs) was analyzed both in vitro and in vivo. DEX-NPs conjugated with the model antigen ovalbumin (OVA) and immunostimulatory CpG-rich oligodeoxynucleotides were administered to monitor the induction of cellular and humoral immune responses. Therapeutic effects of this DEX-NP vaccine in mouse models of OVA-induced anaphylaxis and allergic asthma were assessed.

Results: DEX-NPs triggered lectin-induced complement activation, yielding deposition of activated complement factor 3 on the DEX-NP surface. In the spleen DEX-NPs targeted predominantly B cells through complement receptors 1 and 2. The DEX-NP vaccine elicited much stronger OVA-specific IgG2a production than coadministered soluble OVA plus CpG oligodeoxynucleotides. B-cell binding of the DEX-NP vaccine was critical for IgG2a production. Treatment of OVA-sensitized mice with the DEX-NP vaccine prevented induction of anaphylactic shock and allergic asthma accompanied by IgE inhibition.

Conclusions: Opsonization of lectin-coated NPs by activated complement components results in selective B-cell targeting. The intrinsic B-cell targeting property of lectin-coated NPs can be exploited for treatment of allergic immune responses.

Keywords: B cells; Dendritic cells; IgG(2a); antibody; complement; complement factor 3; lectin pathway.

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