克洛托保护INS-1胰腺β细胞免受衰老,并增强线粒体功能
Zhihong Wang1, Yunzhi Ni1, Yan-Ru Lou2
1Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai, China.
Frontiers in aging
|February 28, 2025
概括
衰老会损害胰腺β细胞的功能,导致2型糖尿病. 抗衰老蛋白Klotho (KL) 保护β细胞免受衰老,改善功能和胰岛素分泌.
科学领域:
- 内分泌学 在内分泌学.
- 老年学是指老年学的学科.
- 细胞生物学 细胞生物学
背景情况:
- 衰老是胰腺β细胞衰竭和2型糖尿病 (T2D) 的关键因素.
- 衰老和衰老相关的分泌表型 (SASP) 在衰老的β细胞中有助于功能障碍.
- 抗衰老蛋白α-Klotho (KL) 在β细胞衰老中的作用尚不清楚.
研究的目的:
- 研究α-Klotho (KL) 在调节胰腺β细胞衰老中的作用.
- 探索KL对与年龄相关的β细胞功能障碍的保护作用.
主要方法:
- 在小鼠胰岛素瘤 (INS-1) 细胞中使用多克索鲁比辛在体外诱导衰老.
- 评估了衰老标志物,SA-β-gal染色,线粒体功能 (ATP生产,ROS) 和胰岛素分泌.
- 用外源KL蛋白补充细胞以评估其保护作用.
主要成果:
- 用 doxorubicin 治疗的 INS-1 细胞表现出衰老的特征,并减少了内源性 KL 表达.
- 外源性KL补充剂防止了衰老,改善了线粒体功能,并减少了ROS的产生.
- KL补充剂逆转了多克索鲁比辛诱导的葡萄糖刺激胰岛素分泌的损害.
结论:
- α-Klotho (KL) 在调节β细胞衰老方面发挥着重要作用.
- KL显示出对与年龄相关的β细胞功能障碍的保护作用,并可能为T2D提供治疗潜力.
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