Knockdown of angiopoietin-like 4 suppresses sepsis-induced acute lung injury by blocking the NF-κB pathway activation and hindering macrophage M1 polarization and pyroptosis

Copyright © 2023 Elsevier Ltd. All rights reserved..

OBJECTIVE: Sepsis-induced acute lung injury (ALI) is a life-threatening disease. Macrophage pyroptosis has been reported to exert function in ALI. We aimed to investigate the mechanisms of ANGPTL4-mediated cell pyroptosis in sepsis-induced ALI, thus providing new insights into the pathogenesis and prevention and treatment measures of sepsis-induced ALI.

METHODS: In vivo animal models and in vitro cell models were established by cecal ligation and puncture (CLP) method and lipopolysaccharide-induced macrophages RAW264.7. ANGPTL4 was silenced in CLP mice or macrophages, followed by the determination of ANGPTL4 expression in bronchoalveolar lavage fluid (BALF) or macrophages. Lung histopathology was observed by H&E staining, with pathological injury scores evaluated and lung wet and dry weight ratio recorded. M1/M2 macrophage marker levels (iNOS/CD86/Arg1), inflammatory factor (TNF-α/IL-6/IL-1β/iNOS) expression in BALF, cell death and pyroptosis, NLRP3 inflammasome, cell pyroptosis-related protein (NLRP3/Cleaved-caspase-1/caspase-1/GSDMD-N) levels, NF-κB pathway activation were assessed by RT-qPCR/ELISA/flow cytometry/Western blot, respectively.

RESULTS: ANGPTL4 was highly expressed in mice with sepsis-induced ALI, and ANGPTL4 silencing ameliorated sepsis-induced ALI in mice. In vivo, ANGPTL4 silencing repressed M1 macrophage polarization and macrophage pyroptosis in mice with sepsis-induced ALI. In vitro, ANGPTL4 knockout impeded LPS-induced activation and pyroptosis of M1 macrophages and hindered LPS-induced activation of the NF-κB pathway in macrophages.

CONCLUSION: Knockdown of ANGPTL4 blocks the NF-κB pathway activation, hinders macrophage M1 polarization and pyroptosis, thereby suppressing sepsis-induced ALI.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

2023

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:94

Enthalten in:

Toxicology in vitro : an international journal published in association with BIBRA - 94(2023) vom: 16. Feb., Seite 105709

Sprache:

Englisch

Beteiligte Personen:

Sun, Baisheng [VerfasserIn]
Bai, Lina [VerfasserIn]
Li, Qinglin [VerfasserIn]
Sun, Yubo [VerfasserIn]
Li, Mei [VerfasserIn]
Wang, Jiazhi [VerfasserIn]
Shi, Xiaoli [VerfasserIn]
Zhao, Meng [VerfasserIn]

Links:

Volltext

Themen:

Acute lung injury
Angiopoietin-like 4
Angiopoietins
Angptl4 protein, mouse
Caspases
EC 3.4.22.-
Journal Article
Lipopolysaccharides
M1 polarization
Macrophage
NF-kappa B
NLR Family, Pyrin Domain-Containing 3 Protein
Pyroptosis
Sepsis

Anmerkungen:

Date Completed 15.12.2023

Date Revised 15.12.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.tiv.2023.105709

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM36313798X