Oxeiptosis, a ROS-induced Caspase-independent Apoptosis-like Cell-death Pathway

Overview

Journal Nat Immunol

Date 2017 Dec 20

PMID 29255269

Citations 177

Authors

Cathleen Holze

Chloe Michaudel

Claire Mackowiak

Darya A Haas

Christian Benda

Philipp Hubel

Friederike L Pennemann

Daniel Schnepf

Jennifer Wettmarshausen

Marianne Braun

Daisy W Leung

Gaya K Amarasinghe

Fabiana Perocchi

Peter Staeheli

Bernhard Ryffel

Andreas Pichlmair

Affiliations

Soon will be listed here.

Abstract

Reactive oxygen species (ROS) are generated by virus-infected cells; however, the physiological importance of ROS generated under these conditions is unclear. Here we found that the inflammation and cell death induced by exposure of mice or cells to sources of ROS were not altered in the absence of canonical ROS-sensing pathways or known cell-death pathways. ROS-induced cell-death signaling involved interactions among the cellular ROS sensor and antioxidant factor KEAP1, the phosphatase PGAM5 and the proapoptotic factor AIFM1. Pgam5 mice showed exacerbated lung inflammation and proinflammatory cytokines in an ozone-exposure model. Similarly, challenge with influenza A virus led to increased infiltration of the virus, lymphocytic bronchiolitis and reduced survival of Pgam5 mice. This pathway, which we have called 'oxeiptosis', was a ROS-sensitive, caspase independent, non-inflammatory cell-death pathway and was important for protection against inflammation induced by ROS or ROS-generating agents such as viral pathogens.

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