Remimazolam Alleviates Ventilator-Induced Lung Injury by Activating TSPO to Inhibit Macrophage Pyroptosis.
Discov Med
; 36(187): 1600-1609, 2024 Aug.
Article
en En
| MEDLINE
| ID: mdl-39190375
ABSTRACT
BACKGROUND:
Macrophages are activated in ventilator-induced lung injury (VILI), accompanied by macrophage pyroptosis. Remimazolam (Re) plays a role in inhibiting macrophage activation. In this study, we aimed to investigate the mechanism of Re in VILI.METHODS:
A VILI model (20 mL/kg mechanical ventilation) was created using C57BL/6 mice. Alveolar macrophages were isolated from bronchoalveolar lavage fluid (BALF) and received mechanical stretching to simulate the mechanical ventilation in vitro. VILI model mice were treated with Re (16 mg/kg) to assess the alveolar structure, wet/dry (W/D) weight ratio, endothelial barrier antigen (EBA) permeability index, BALF protein content, inflammatory factors, macrophage pyroptosis, pyroptosis-related factors, and translocator protein (TSPO) level using a series of biological experiments. Whether Re alleviated macrophage pyroptosis by regulating TSPO was determined by rescue experiments.RESULTS:
Re alleviated VILI, as evidenced by improvement of abnormal morphology of lung tissues during VILI and decreases in the lung W/D weight ratio, lung EBA permeability index, and BALF protein content. Re attenuated pulmonary inflammation and macrophage pyroptosis during VILI via down-regulation of inflammatory factors (myeloperoxidase, malondialchehyche, 8-hydroxy-2 deoxyguanosine, interleukin-6, tumor necrosis factor-α, macrophage inflammatory protein-2, interleukin-1ß, and interleukin-18), and pyroptosis factors (cleaved gasdermin D (GSDMD)/GSDMD value, NOD-like receptor thermal protein domain associated protein 3 (NLRP3), and caspase-1). Re activated TSPO in macrophages. TSPO overexpression rescued the cell stretch-inhibited macrophage viability and cell stretch-induced macrophage pyroptosis.CONCLUSION:
Re alleviates VILI by activating TSPO to inhibit macrophage pyroptosis.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Lesión Pulmonar Inducida por Ventilación Mecánica
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Piroptosis
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Ratones Endogámicos C57BL
Límite:
Animals
Idioma:
En
Revista:
Discov Med
Año:
2024
Tipo del documento:
Article
País de afiliación:
China
Pais de publicación:
Estados Unidos