NADPH oxidase subunit NOXO1 is a target for emphysema treatment in COPD.

Nature Metabolism
Michael SeimetzNorbert Weissmann

Abstract

Chronic obstructive pulmonary disease (COPD) is a major cause of morbidity and death worldwide. Peroxynitrite, formed from nitric oxide, which is derived from inducible nitric oxide synthase, and superoxide, has been implicated in the development of emphysema, but the source of the superoxide was hitherto not characterized. Here, we identify the non-phagocytic NADPH oxidase organizer 1 (NOXO1) as the superoxide source and an essential driver of smoke-induced emphysema and pulmonary hypertension development in mice. NOXO1 is consistently upregulated in two models of lung emphysema, Cybb (also known as NADPH oxidase 2, Nox2)-knockout mice and wild-type mice with tobacco-smoke-induced emphysema, and in human COPD. Noxo1-knockout mice are protected against tobacco-smoke-induced pulmonary hypertension and emphysema. Quantification of superoxide, nitrotyrosine and multiple NOXO1-dependent signalling pathways confirm that peroxynitrite formation from nitric oxide and superoxide is a driver of lung emphysema. Our results suggest that NOXO1 may have potential as a therapeutic target in emphysema.

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Citations

Dec 11, 2020·JCI Insight·Caspar SchiffersAlbert van der Vliet
Mar 25, 2021·American Journal of Physiology. Lung Cellular and Molecular Physiology·Stefan HadzicNorbert Weissmann
Sep 20, 2020·Redox Biology·Giulia K BuchmannRalf P Brandes

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Datasets Mentioned

BETA
GSE112287

Methods Mentioned

BETA
GTPases
PCR
electron spin resonance
confocal microscopy
bronchoalveolar lavage
ESR
transfection

Key Resources (RRID) Mentioned

AB_2315602

Software Mentioned

GenePix
Leica
R
AutoQuant X2
QuikChange Primer
Imaris
Leica Qwin
FlexiWare
lme4
Analyze

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