Details:

Alternative Title:
J Nutr Biochem
Personal Author:
Nordgren, Tara M. ; Heires, Art J. ; Zempleni, Janos ; Swanson, Benjamin J. ; Wichman, Christopher ; ... More +
Nordgren, Tara M. ; Heires, Art J. ; Zempleni, Janos ; Swanson, Benjamin J. ; Wichman, Christopher ; Romberger, Debra J. ; Less -
Description:
Occupational agricultural dust exposure can cause severe lung injury, including COPD and asthma exacerbations. Cell-derived extracellular vesicles can mediate inflammatory responses and immune activation, but the contribution of diet-derived extracellular vesicles to these processes is poorly understood. We investigated whether bovine milk-derived extracellular vesicles modulate inflammatory responses to agricultural dust exposures in a murine model. C57BL/6 mice were fed either an extracellular vesicle-enriched modification of the AIN-93G diet with lyophilized bovine milk (EV) or a control diet wherein the milk was presonicated, disrupting the milk extracellular vesicles and thereby leading to RNA degradation (DEV). Mice were maintained on the diets for 5-7 weeks and challenged with a single (acute) intranasal instillation of a 12.5% organic dust extract (DE) or with 15 instillations over 3 weeks (repetitive exposure model). Through these investigations, we identified significant interactions between diet and DE when considering numerous inflammatory outcomes, including lavage inflammatory cytokine levels and cellular infiltration into the lung airways. DE-treated peritoneal macrophages also demonstrated altered polarization, with EV-fed mouse macrophages exhibiting an M1 shift compared to an M2 phenotype in DEV-fed mice (IL-6, TNF, IL-12/23 all significantly elevated, and IL-10 and arginase decreased in EV macrophages, ex vivo). In complementary in vitro studies, mouse macrophages treated with purified milk-derived EV were found to express similar polarization phenotypes upon DE stimulation. These results suggest a role for dietary extracellular vesicles in the modulation of lung inflammation in response to organic dust which may involve macrophage phenotype polarization.
Subject:
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Article
Lung Inflammation
Macrophages
Milk Extracellular Vesicles
Organic Dust

Source:
J Nutr Biochem. 64:110-120 ;
Pubmed ID:
30476878
Pubmed Central ID:
PMC6363837
Document Type:
Journal Article ;
Funding:
R00 ES025819/ES/NIEHS NIH HHS/United States ; K99 ES025819/ES/NIEHS NIH HHS/United States ; P20 GM104320/GM/NIGMS NIH HHS/United States ; R01 OH008539/OH/NIOSH CDC HHS/United States ; I01 CX001714/CX/CSRD VA/United States ; ... More +
R00 ES025819/ES/NIEHS NIH HHS/United States ; K99 ES025819/ES/NIEHS NIH HHS/United States ; P20 GM104320/GM/NIGMS NIH HHS/United States ; R01 OH008539/OH/NIOSH CDC HHS/United States ; I01 CX001714/CX/CSRD VA/United States ; U54 OH010162/OH/NIOSH CDC HHS/United States ; Less -
Collection(s):
CDC Public Access
Main Document Checksum:
[+]
urn:sha256:360e5c89a7ff01a4646a8034d04864fface54086bf671e3252b3f7aaf7238037
File Type:

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