Inhibition the ubiquitination of ENaC and Na,K-ATPase with erythropoietin promotes alveolar fluid clearance in sepsis-induced acute respiratory distress syndrome - 27/04/24
Abstract |
Sepsis-induced acute respiratory distress syndrome (ARDS) causes significant fatalities worldwide and lacks pharmacological intervention. Alveolar fluid clearance (AFC) plays a pivotal role in the remission of ARDS and is markedly impaired in the pathogenesis of ARDS. Here, we demonstrated that erythropoietin could effectively ameliorate lung injury manifestations and lethality, restore lung function and promote AFC in a rat model of lipopolysaccharide (LPS)-induced ARDS. Moreover, it was proven that EPO-induced restoration of AFC occurs through triggering the total protein expression of ENaC and Na,K-ATPase channels, enhancing their protein abundance in the membrane, and suppressing their ubiquitination for degeneration. Mechanistically, the data indicated the possible involvement of EPOR/JAK2/STAT3/SGK1/Nedd4–2 signaling in this process, and the pharmacological inhibition of the pathway markedly eliminated the stimulating effects of EPO on ENaC and Na,K-ATPase, and subsequently reversed the augmentation of AFC by EPO. Consistently, in vitro studies of alveolar epithelial cells paralleled with that EPO upregulated the expression of ENaC and Na,K-ATPase, and patch-clamp studies further demonstrated that EPO substantially strengthened sodium ion currents. Collectively, EPO could effectively promote AFC by improving ENaC and Na,K-ATPase protein expression and abundance in the membrane, dependent on inhibition of ENaC and Na,K-ATPase ubiquitination, and resulting in diminishing LPS-associated lung injuries.
Le texte complet de cet article est disponible en PDF.Graphical Abstract |
Scheme summarizing the protective role of EPO in promoting alveolar fluid clearance in ARDS via EPOR/JAK2/STAT3/SGK1/Nedd4–2 signaling dependent inhibition of ENaC and Na,K-ATPase ubiquitination.
Scheme summarizing the protective role of EPO in promoting alveolar fluid clearance in ARDS via EPOR/JAK2/STAT3/SGK1/Nedd4–2 signaling dependent inhibition of ENaC and Na,K-ATPase ubiquitination.Le texte complet de cet article est disponible en PDF.
Highlights |
• | EPO protects against septic acute lung injury by accelerating alveolar fluid clearance (AFC). |
• | EPO accelerated AFC via restoring the protein expression of ENaC and Na,K-ATPase channels. |
• | EPO suppressed the ubiquitination of ENaC and Na,K-ATPase for degradation by EPOR/JAK2/STAT3/SGK1/Nedd4-2 pathway. |
Abbreviations : ARDS, AFC, ATII, ASIC1, Ang-1, EPO, ENaC, EPOR, LPS, Nedd4-2, ANOVA, RhEPO, ROMK1, VEGF, SGK1
Keywords : acute respiratory distress syndrome, alveolar fluid clearance, ENaC, Na,K-ATPase, ubiquitination, erythropoietin
Plan
Vol 174
Article 116447- mai 2024 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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