sKlotho 通过调控 RIP1 的表达对缺血性脑卒中的改善作用

石 雨妍, 魏 　璇, 张 思怡, 曹 欣瑶, 毕 芳芳
西安培华学院

摘要

目的：探讨 sKlotho 通过调控 RIP1 的表达对缺血性脑卒中的改善作用，从新的视角深入了解缺血性脑卒中后
sKlotho 的变化规律及作用，阐明 sKlotho 参与缺血性脑卒中后 RIP1 表达调控的分子机制，对深化缺血性脑卒中的病理过程
理解和设定临床干预靶点奠定基础。方法：。将健康雄性 C57BL/6 鼠 40 只，随机平均分为对照组（Sham）、模型组（MCAO）。
采用 Real-time PCR、Western blotting、免疫组化染色等方法检测 sKlotho、RIP1 蛋白和 mRNA 的表达变化；采用 Co-IP
方法检测 sKlotho 和 RIP1 蛋白的相互作用。结果： Klotho 在 MCAO 模型小鼠脑部水平降低（P ＜ 0.05），过表达 Klotho
能有效抑制神经元死亡并缓解脑损伤和神经功能障碍。MCAO 模型神经元呈现坏死性凋亡蛋白 RIP1 和 MLKL 激活等坏死
性凋亡改变，过表达 Klotho 促进 RIP1 降解（P ＜ 0.05），并减轻了神经元坏死性凋亡。结论：Klotho 促进 RIP1 降解、抑
制神经元坏死性凋亡可能是其脑卒中后脑保护作用的重要方式。

关键词

sKlotho；RIP1；缺血性脑卒中

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