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- W3204024897 endingPage "10336" @default.
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- W3204024897 abstract "Sensing microbial tryptophan catabolites by the aryl hydrocarbon receptor (AhR) plays a pivotal role in host-microbiome homeostasis by modulating the host immune response. Nevertheless, the involved cellular processes triggered by the metabolites are mainly unknown. Here, we analyzed proteomic changes in macrophages after treatment with the tryptophan metabolites indole-3-acetic acid (I3AA) or indole-3-aldehyde (IAld), as well as the prototypic exogenous AhR-ligand benzo(a)pyrene (BaP) in the absence and presence of lipopolysaccharide (LPS) to identify affected cellular processes and pathways. The AhR-ligands regulated metabolic and immunologic processes in dependency of LPS co-stimulation. All investigated ligands time-dependently enhanced fatty acid β-oxidation. Differences due to the combination with LPS were observed for all three ligands. Additionally, oxidative phosphorylation was significantly increased by IAld and I3AA in a time and LPS-dependent manner. Immunoregulatory processes were affected in distinct ways. While BaP and I3AA up-regulated IL-8 signaling, IL-6 signaling was decreased by IAld. BaP decreased the inflammasome pathway. Thus, AhR-ligand-dependent regulations were identified, which may modulate the response of macrophages to bacterial infections, but also the commensal microbiota through changes in immune cell signaling and metabolic pathways that may also alter functionality. These findings highlight the relevance of AhR for maintaining microbial homeostasis and, consequently, host health." @default.
- W3204024897 created "2021-10-11" @default.
- W3204024897 creator A5027184873 @default.
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- W3204024897 creator A5070686533 @default.
- W3204024897 creator A5076028970 @default.
- W3204024897 date "2021-09-30" @default.
- W3204024897 modified "2023-09-26" @default.
- W3204024897 title "Proteomic Characterization of the Cellular Effects of AhR Activation by Microbial Tryptophan Catabolites in Endotoxin-Activated Human Macrophages" @default.
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- W3204024897 doi "https://doi.org/10.3390/ijerph181910336" @default.
- W3204024897 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8507890" @default.
- W3204024897 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34639632" @default.
- W3204024897 hasPublicationYear "2021" @default.
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