Beyond bacterial killing: NADPH oxidase 2 is an immunomodulator.

Abstract:

:NADPH oxidase 2 is a superoxide-generating enzymatic complex based on the catalytic subunit gp91phox that is also known as Nox2. Initially identified in neutrophils, NADPH oxidase 2 was long considered responsible only for the killing of phagocytized microorganisms. However, advances in knowledge about redox signalling and the discovery of Nox2 expression in different cell types, including macrophages, endothelial cells (ECs), dendritic cells (DCs), B and T lymphocytes, have changed this paradigm. For instance, Nox2 expressed in macrophages and neutrophils limits the transcription of cytokines and toll-like receptors (TLRs) induced by lipopolysaccharide (LPS), whereas DC Nox2 facilitates antigen cross-presentation to T cells. More recently, our group observed that Nox2 inhibits the suppressive ability of regulatory T cells (Tregs) by limiting NF-κB and FoxP3 activation. In this review, we discuss non-canonical microbicidal functions and redox-signalling-associated roles of Nox2 in different cell types, emphasizing its roles in the innate and adaptive immune system.

journal_name

Immunol Lett

journal_title

Immunology letters

authors

Trevelin SC,Shah AM,Lombardi G

doi

10.1016/j.imlet.2020.02.009

subject

Has Abstract

pub_date

2020-05-01 00:00:00

pages

39-48

eissn

0165-2478

issn

1879-0542

pii

S0165-2478(19)30600-5

journal_volume

221

pub_type

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