Back to Search Start Over

Epithelial Dual Oxidase 2 Shapes the Mucosal Microbiome and Contributes to Inflammatory Susceptibility.

Authors :
Castrillón-Betancur JC
López-Agudelo VA
Sommer N
Cleeves S
Bernardes JP
Weber-Stiehl S
Rosenstiel P
Sommer F
Source :
Antioxidants (Basel, Switzerland) [Antioxidants (Basel)] 2023 Oct 21; Vol. 12 (10). Date of Electronic Publication: 2023 Oct 21.
Publication Year :
2023

Abstract

Reactive oxygen species (ROS) are highly reactive molecules formed from diatomic oxygen. They act as cellular signals, exert antibiotic activity towards invading microorganisms, but can also damage host cells. Dual oxidase 2 (DUOX2) is the main ROS-producing enzyme in the intestine, regulated by cues of the commensal microbiota and functions in pathogen defense. DUOX2 plays multiple roles in different organs and cell types, complicating the functional analysis using systemic deletion models. Here, we interrogate the precise role of epithelial DUOX2 for intestinal homeostasis and host-microbiome interactions. Conditional Duox2 <superscript>∆IEC</superscript> mice lacking DUOX2, specifically in intestinal epithelial cells, were generated, and their intestinal mucosal immune phenotype and microbiome were analyzed. Inflammatory susceptibility was evaluated by challenging Duox2 <superscript>∆IEC</superscript> mice in the dextran sodium sulfate (DSS) colitis model. DUOX2-microbiome interactions in humans were investigated by paired analyses of mucosal DUOX2 expression and fecal microbiome data in patients with intestinal inflammation. Under unchallenged conditions, we did not observe any obvious phenotype of Duox2 <superscript>∆IEC</superscript> mice, although intestinal epithelial ROS production was drastically decreased, and the mucosal microbiome composition was altered. When challenged with DSS, Duox2 <superscript>∆IEC</superscript> mice were protected from colitis, possibly by inhibiting ROS-mediated damage and fostering epithelial regenerative responses. Finally, in patients with intestinal inflammation, DUOX2 expression was increased in inflamed tissue, and high DUOX2 levels were linked to a dysbiotic microbiome. Our findings demonstrate that bidirectional DUOX2-microbiome interactions contribute to mucosal homeostasis, and their dysregulation may drive disease development, thus highlighting this axis as a therapeutic target to treat intestinal inflammation.

Details

Language :
English
ISSN :
2076-3921
Volume :
12
Issue :
10
Database :
MEDLINE
Journal :
Antioxidants (Basel, Switzerland)
Publication Type :
Academic Journal
Accession number :
37891968
Full Text :
https://doi.org/10.3390/antiox12101889