H₂S protecting against lung injury following limb ischemia-reperfusion by alleviating inflammation and water transport abnormality in rats / 生物医学与环境科学(英文)
Biomedical and Environmental Sciences
; (12): 410-418, 2014.
Article
de En
| WPRIM
| ID: wpr-270586
Bibliothèque responsable:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effect of H₂S on lower limb ischemia-reperfusion (LIR) induced lung injury and explore the underlying mechanism.</p><p><b>METHODS</b>Wistar rats were randomly divided into control group, IR group, IR+ Sodium Hydrosulphide (NaHS) group and IR+ DL-propargylglycine (PPG) group. IR group as lung injury model induced by LIR were given 4 h reperfusion following 4 h ischemia of bilateral hindlimbs with rubber bands. NaHS (0.78 mg/kg) as exogenous H₂S donor and PPG (60 mg/kg) which can suppress endogenous H₂S production were administrated before LIR, respectively. The lungs were removed for histologic analysis, the determination of wet-to-dry weight ratios and the measurement of mRNA and protein levels of aquaporin-1 (AQP₁), aquaporin-5 (AQP₅) as indexes of water transport abnormality, and mRNA and protein levels of Toll-like receptor 4 (TLR₄), myeloid differentiation primary-response gene 88 (MyD88) and p-NF-κB as indexes of inflammation.</p><p><b>RESULTS</b>LIR induced lung injury was accompanied with upregulation of TLR₄-Myd88-NF-κB pathway and downregulation of AQP1/AQP₅. NaHS pre-treatment reduced lung injury with increasing AQP₁/AQP₅ expression and inhibition of TLR₄-Myd88-NF-κB pathway, but PPG adjusted AQP₁/AQP₅ and TLR4 pathway to the opposite side and exacerbated lung injury.</p><p><b>CONCLUSION</b>Endogenous H₂S, TLR₄-Myd88-NF-κB pathway and AQP₁/AQP₅ were involved in LIR induced lung injury. Increased H₂S would alleviate lung injury and the effect is at least partially depend on the adjustment of TLR₄-Myd88-NF-κB pathway and AQP₁/AQP₅ expression to reduce inflammatory reaction and lessen pulmonary edema.</p>
Mots clés
Texte intégral:
1
Indice:
WPRIM
Sujet Principal:
Anatomopathologie
/
Pharmacologie
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Eau
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Lésion d'ischémie-reperfusion
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Répartition aléatoire
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Facteur de transcription NF-kappa B
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Rat Wistar
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Aquaporines
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Utilisations thérapeutiques
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Évaluation préclinique de médicament
Type d'étude:
Prognostic_studies
Limites du sujet:
Animals
langue:
En
Texte intégral:
Biomedical and Environmental Sciences
Année:
2014
Type:
Article