艾司氯胺酮通过腺苷酸活化蛋白激酶/沉默信息调节因子1信号通路对老年骨折大鼠术后认知功能的影响
黄同玲 , 郑建滨 , 王明虹 , 谢薇薇
西北药学杂志 ›› 2025, Vol. 40 ›› Issue (3) : 132 -138.
艾司氯胺酮通过腺苷酸活化蛋白激酶/沉默信息调节因子1信号通路对老年骨折大鼠术后认知功能的影响
Esketamine alleviates postoperative cognitive decline in elderly fracture rats through adenosine monophosphate-activated protein kinase/silent information regulator 1 signaling pathway
目的 探讨艾司氯胺酮通过腺苷酸活化蛋白激酶(adenosine monophosphate-activated protein kinase,AMPK)/沉默信息调节因子1(silent information regulator 1,SIRT1)信号通路对老年骨折大鼠术后认知功能的影响。 方法 建立老年术后认知功能障碍(postoperative cognitive dysfunction,POCD)大鼠胫骨骨折模型,将30只大鼠随机分为空白对照组、溶剂组、艾司氯胺酮组、MK-3903组和BAY-3827组。采用Morris水迷宫实验评价大鼠的认知能力;采用苏木精-伊红(hematoxylin-eosin,HE)染色观察海马神经元的形态和结构;采用免疫组织化学分析细胞凋亡相关蛋白的表达;采用Western blotting检测AMPK/SIRT1信号通路相关蛋白的表达;采用透射电子显微镜观察线粒体的形态。 结果 与空白对照组和溶剂组比较,艾司氯胺酮组、MK-3903组和BAY-3827组大鼠的术后认知障碍发生率均显著降低(P<0.05)。与空白对照组和溶剂组比较,艾司氯胺酮组、MK-3903组的p-AMPK和SIRT1表达水平均显著升高(P<0.05)。与艾司氯胺酮组比较,BAY-3827组的p-AMPK和SIRT1的表达水平均显著降低(P<0.05)。 结论 艾司氯胺酮可能通过激活AMPK/SIRT1信号通路改善大鼠的术后认知功能。
Objective To investigate the effect of esketamine on postoperative cognitive function in elderly fracture rats through adenosine monophosphate-activated protein kinase (AMPK)/silent information regulator 1 (SIRT1) signaling pathway. Methods A rat model of postoperative cognitive dysfunction (POCD) with tibial fracture was established and divided into blank control group, solvent group, esketamine group, MK-3903 group and BAY-3827 group. The Morris water maze test was employed to assess the changes in cognitive abilities. Morphological and structural alterations in hippocampal neurons were examined via hematoxylin-eosin (HE) staining under light microscopy. The expression of apoptosis-related proteins was analyzed through immunohistochemistry, while the expression of proteins associated with the AMPK/SIRT1 signaling pathway was detected by Western blotting. Additionally, mitochondrial morphological changes were observed by using transmission electron microscopy. Results The water maze test revealed that the incidence of postoperative cognitive impairment was significantly lower in the esketamine group, MK-3903 group and BAY-3827 group compared with the blank and solvent groups (P<0.05). The expression of p-AMPK and SIRT1 was significantly higher in the esketamine group and MK-3903 group than in the control group, whereas the expression of related proteins was significantly lower in the BAY-3827 group than in the esketamine group (P<0.05). Conclusion Esketamine may enhance postoperative cognitive function in rats by activating the AMPK/SIRT1 signaling pathway.
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宁德师范学院级科研项目(2024ZX86)
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