Leukotriene B4-induced neutrophil extracellular traps impede the clearance of Pneumocystis.
Eur J Immunol
; 54(5): e2350779, 2024 May.
Article
em En
| MEDLINE
| ID: mdl-38440842
ABSTRACT
Pneumocystis pneumonia (PCP) is a fungal pulmonary disease with high mortality in immunocompromised patients. Neutrophils are essential in defending against fungal infections; however, their role in PCP is controversial. Here we aim to investigate the effects of neutrophil extracellular traps (NETs) on Pneumocystis clearance and lung injury using a mouse model of PCP. Intriguingly, although neutrophils play a fundamental role in defending against fungal infections, NETs failed to eliminate Pneumocystis, but instead impaired the killing of Pneumocystis. Mechanically, Pneumocystis triggered Leukotriene B4 (LTB4)-dependent neutrophil swarming, leading to agglutinative NET formation. Blocking Leukotriene B4 with its receptor antagonist Etalocib significantly reduced the accumulation and NET release of neutrophils in vitro and in vivo, enhanced the killing ability of neutrophils against Pneumocystis, and alleviated lung injury in PCP mice. This study identifies the deleterious role of agglutinative NETs in Pneumocystis infection and reveals a new way to prevent NET formation, which provides new insights into the pathogenesis of PCP.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Pneumocystis
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Pneumonia por Pneumocystis
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Leucotrieno B4
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Armadilhas Extracelulares
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Neutrófilos
Limite:
Animals
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Humans
Idioma:
En
Revista:
Eur J Immunol
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
China