Evaluation of the Impact of BaP Exposure on the Gut Microbiota and Allergic Responses in an OVA-Sensitized Mouse Model.
| Autor: | Beibei Du1,2, Xiaojun Xiao3, Huailing Wang3, Wenxi Li2,4, Zhongkui Xia2, Pingchang Yang3,5, Shau-Ku Huang5,6,7, Ruyi Yuan3, Jie Liu3, Mo Han2,8,9, Yuanqiang Zou2,8,9,10, Jiahui Zhu2, Dongdong He2, Jinli Lyu2, Xin Jin1,2, Xun Xu2, Jian Wang2, Huanming Yang2,10, Liang Xiao1,2,9,10 xiaoliang@genomics.cn, Xiaoyu Liu3 lxy0901@szu.edu.cn |
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| Předmět: |
*Animal experimentation
*Hydrocarbons *Allergies *Allergens Inflammation prevention Albumins In vitro studies Cytokines Statistics Kruskal-Wallis Test Analysis of variance Gut microbiome Immunohistochemistry Permeability Quantitative research Human microbiota Genomes Enzyme-linked immunosorbent assay Descriptive statistics Cell surface antigens Bacterial diseases Data analysis Data analysis software Immunodiagnosis Mice |
| Zdroj: | Environmental Health Perspectives. Jun2023, Vol. 131 Issue 6, p067004-1-067004-15. 15p. 1 Color Photograph, 1 Diagram, 1 Chart, 4 Graphs. |
| Abstrakt: | BACKGROUND: Exposure to environmental pollutants, including benzo[a]pyrene (BaP), has been implicated in allergic diseases and intestinal microbiota homeostasis, but the environment–microbiota–immunity triangular relationship and to what extent BaP-induced remodeling of the gut microbiota contributes to intestinal allergic inflammation remain to be established. OBJECTIVES: We investigated the impact of BaP on intestinal allergic inflammation and examined the relationship between this effect and gut microbiota dysbiosis. We explored the potential ability of intestinal bacteria to degrade BaP and alleviate cytotoxicity as a detoxification strategy to counteract the effects of BaP exposure. METHODS: We combined microbiome shotgun metagenomics with animal histological and intestinal allergic inflammatory responses to assess the effects of BaP (50 μg/mouse per day) in a 23-d toxicity test in antigen-induced allergic female mice. In addition, genome annotation, quantitative analysis of BaP, and in vitro cytotoxicity-tests using CaCo-2 cells were conducted to infer the role of intestinal bacteria in BaP detoxification. RESULTS: BaP exposure impacted the taxonomic composition and the functional potential of the gut microbiota and aggravated antigen-induced intestinal allergic inflammatory responses. The level of inflammatory cytokines correlated with the abundance of specific bacterial taxa, including Lachnospiraceae bacterium 28-4 and Alistipes inops. We identified 614 bacteria harboring genes implicated in the degradation of BaP, and 4 of these bacterial strains were shown to significantly reduce the cytotoxicity of BaP to CaCo-2 cells in vitro. DISCUSSION: Using allergic female mice as a model, we investigated the relationship between BaP, microbiota, and host immune reactions, highlighting the role of gut bacteria in BaP-aggravated allergic reactions. Our findings offer novel insight toward establishing the causal relationship between BaP exposure and the occurrence of allergic disorders. Identifying gut bacteria that degrade BaP may provide new strategies for ameliorating BaP cytotoxicity. [ABSTRACT FROM AUTHOR] |
| Databáze: | GreenFILE |
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