Phosgene-Induced Acute Lung Injury Mechanisms and Treatments
Summary
Phosgene (COCl₂) inhalation leads to dose-dependent disruption of the alveolar-capillary barrier, surfactant inactivation and an intense inflammatory response. Initial injury involves direct chemical modification of proteins and lipids in the distal airways, generating reactive oxygen species and triggering pro-inflammatory cytokine release. Endothelial and epithelial cell death promotes non-cardiogenic pulmonary oedema, ventilation–perfusion mismatch and hypoxaemia. Clinical progression may culminate in acute respiratory distress syndrome (ARDS), refractory hypoxaemia and right-heart strain. Current management remains largely supportive, with lung-protective mechanical ventilation using positive end-expiratory pressure (PEEP), fluid management and, in severe cases, extracorporeal membrane oxygenation (ECMO). Experimental therapies under investigation include targeted antioxidants, inhibitors of inducible nitric oxide synthase, anti-adhesion biologics to limit neutrophil influx and nanoparticle-mediated delivery of anti-inflammatory agents. Advances in computational modelling and prognostic biomarkers have begun to inform personalised ventilatory strategies and optimise the timing of adjunct treatments, underscoring the global need for mechanism-based interventions in industrial and accidental exposures.
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Phosgene-Induced Acute Lung Injury Mechanisms and Treatments publication trend
The graph below shows the total number of articles in phosgene-induced acute lung injury mechanisms and treatments across all publications each year (not limited to Nature Index journals).
Technical terms
Pulmonary oedema: Accumulation of fluid in the interstitial and alveolar spaces of the lung, impairing gas exchange.
Alveolar-capillary barrier: The thin interface between air in the alveoli and blood in pulmonary capillaries, responsible for gas diffusion.
Reactive oxygen species (ROS): Chemically reactive molecules derived from oxygen, implicated in lipid peroxidation and cellular damage.
Acute respiratory distress syndrome (ARDS): A severe form of lung injury characterised by diffuse alveolar damage, hypoxaemia and reduced lung compliance.
Positive end-expiratory pressure (PEEP): A ventilatory setting that maintains airway pressure above atmospheric level at end-expiration to improve alveolar recruitment.
Extracorporeal membrane oxygenation (ECMO): An external circuit providing gas exchange support, used in refractory respiratory failure.
References
- Mechanism of Phosgene-Induced Acute Lung Injury and Treatment Strategy. International Journal of Molecular Sciences (2021).
- Phosgene-Induced acute lung injury: Approaches for mechanism-based treatment strategies. Frontiers in Immunology (2022).
- An in-silico porcine model of phosgene-induced lung injury predicts clinically relevant benefits from application of continuous positive airway pressure up to 8 h post exposure. Toxicology Letters (2023).
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