Activation of the NLRP3 inflammasome is not a feature of all particulate vaccine adjuvants
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Activation of the NLRP3 inflammasome is not a feature of all particulate vaccine adjuvants. / Neumann, Silke; Burkert, Kristina; Kemp, Roslyn; Rades, Thomas; Rod Dunbar, P; Hook, Sarah.
In: Immunology and Cell Biology, Vol. 92, 01.04.2014, p. 535-542.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Activation of the NLRP3 inflammasome is not a feature of all particulate vaccine adjuvants
AU - Neumann, Silke
AU - Burkert, Kristina
AU - Kemp, Roslyn
AU - Rades, Thomas
AU - Rod Dunbar, P
AU - Hook, Sarah
PY - 2014/4/1
Y1 - 2014/4/1
N2 - Particulate vaccine formulations, designed to improve the delivery of antigens to antigen-presenting cells (APCs) and to stimulate an immune response, have been shown to activate the NLRP3 inflammasome. This leads to the processing and secretion of interleukin (IL)-1β, which supports the recruitment of pro-inflammatory immune cells into the tissue and can therefore be beneficial for vaccine potency. Recent work suggested that this may be a common mechanism of action for all particulate formulations. The aim of this study was to investigate whether the activation of the NLRP3 inflammasome was common to many delivery systems. We prepared polymer-based chitosan nanoparticles (CNPs), lipid-based cubosomes, a water in oil emulsion of incomplete Freund's adjuvant (IFA) and alum formulations and examined inflammasome activation in vitro using murine bone-marrow-derived dendritic cells and human peripheral blood mononuclear cells and in vivo in mice. The formulations differed in their morphology, size and zeta-potential. Only the positively charged particles (CNPs and alum) were able to activate the inflammasome and increase the secretion of IL-1β. A decrease in the activation of the inflammasome with these particulates was observed when cathepsin B-mediated effects were blocked, implying a role of lysosomal rupture in the activation process. These findings demonstrate a role for the surface charge of particulates in the activation of the NLRP3 inflammasome, which should be considered when designing a novel vaccine formulation.Immunology and Cell Biology advance online publication, 1 April 2014; doi:10.1038/icb.2014.21.
AB - Particulate vaccine formulations, designed to improve the delivery of antigens to antigen-presenting cells (APCs) and to stimulate an immune response, have been shown to activate the NLRP3 inflammasome. This leads to the processing and secretion of interleukin (IL)-1β, which supports the recruitment of pro-inflammatory immune cells into the tissue and can therefore be beneficial for vaccine potency. Recent work suggested that this may be a common mechanism of action for all particulate formulations. The aim of this study was to investigate whether the activation of the NLRP3 inflammasome was common to many delivery systems. We prepared polymer-based chitosan nanoparticles (CNPs), lipid-based cubosomes, a water in oil emulsion of incomplete Freund's adjuvant (IFA) and alum formulations and examined inflammasome activation in vitro using murine bone-marrow-derived dendritic cells and human peripheral blood mononuclear cells and in vivo in mice. The formulations differed in their morphology, size and zeta-potential. Only the positively charged particles (CNPs and alum) were able to activate the inflammasome and increase the secretion of IL-1β. A decrease in the activation of the inflammasome with these particulates was observed when cathepsin B-mediated effects were blocked, implying a role of lysosomal rupture in the activation process. These findings demonstrate a role for the surface charge of particulates in the activation of the NLRP3 inflammasome, which should be considered when designing a novel vaccine formulation.Immunology and Cell Biology advance online publication, 1 April 2014; doi:10.1038/icb.2014.21.
U2 - 10.1038/icb.2014.21
DO - 10.1038/icb.2014.21
M3 - Journal article
C2 - 24687021
VL - 92
SP - 535
EP - 542
JO - Immunology and Cell Biology
JF - Immunology and Cell Biology
SN - 0818-9641
ER -
ID: 108657435