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基于AMPK/SIRT1信号通路探究艾斯氯胺酮对LPS诱导的急性肺损伤大鼠的改善作用

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摘要 目的从单磷酸腺苷活化蛋白激酶(AMPK)/沉默信息调节因子(SIRT)1通路,探讨艾斯氯胺酮减轻急性肺损伤(ALI)的分子机制。方法取SD大鼠按随机数字表法分为对照组、模型组、艾斯氯胺酮(10 mg/kg)组、AMPK通路抑制剂(Compound C,15 mg/kg)组、艾斯氯胺酮+Compound C组,每组12只;腹腔注射脂多糖(LPS)10 mg/kg建立ALI大鼠模型。检测肺功能指标;取肺泡灌洗液用酶联免疫吸附试验(ELISA)检测炎症因子-肿瘤坏死因子(TNF)-α、白细胞介素(IL)-6;干湿比重法检测肺水肿;苏木素-伊红(HE)染色观察肺组织病理变化;免疫组化法检测磷酸化(p)-AMPK阳性表达;Western印迹检测SIRT1、AMPK、核转录因子(NF)-κB及其p-NF-κB表达。结果与对照组相比,模型组肺组织肺泡水肿、炎症性浸润等病理损伤严重,肺水肿严重、肺功能降低、肺组织炎症因子释放明显增多,AMPK/SIRT1信号通路蛋白表达明显减弱,NF-κB活性明显升高(P<0.05)。与模型组相比,艾斯氯胺酮组大鼠AMPK/SIRT1抗炎信号通路蛋白表达明显升高,NF-κB活性明显降低,肺水肿明显缓解、肺功能明显升高、肺组织炎症因子释放明显减少(均P<0.05)。Compound C可抑制AMPK/SIRT1抗炎信号通路活化,加重肺损伤,并减弱艾斯氯胺酮的抗炎保护作用(P<0.05)。结论艾斯氯胺酮可通过激活AMPK/SIRT1抗炎保护途径,缓解ALI大鼠炎症损伤。
出处 《中国老年学杂志》 CAS 北大核心 2024年第11期2795-2798,共4页 Chinese Journal of Gerontology
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