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微质circDlg1通过阻断与阿尔茨海默病相关的PDE4B随处可见度依赖性降解来调节神经炎症

Jiyun Shi¹, Chenghuan Song¹, Pingao Zhang¹

¹Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.

|March 17, 2025

概括

这项研究确定了循环RNA Dlg1 (circDlg1) 在阿尔茨海默氏症 (AD) 微质中升高. 在AD小鼠中降低circDlg1可以改善微质功能和认知表现,这表明了新的治疗点.

科学领域:

神经科学是一个神经科学.
分子生物学分子生物学
遗传学遗传学是一个

背景情况:

微质激活是阿尔茨海默病 (AD) 的早期事件,驱动神经炎症和病理学.
循环RNAs (circRNAs) 在AD中显示治疗潜力,但它们在微质驱动的神经炎症中的作用尚不清楚.

研究的目的:

研究circRNAs,特别是circDlg1在阿尔茨海默病中微质介导的神经炎症中的作用和机制.
探索circDlg1作为AD的潜在治疗点.

主要方法:

通过circRNA微阵列查,在APP/PS1小鼠的微质中确定了circDlg1.
在AD小鼠模型和患者的微质中验证了circDlg1表达.
在体内通过腺相关病毒中介敲除circDlg1,以评估对神经炎症和认知的影响.
通过使用RNA拉向,质谱和共免疫沉试验,阐明了分子机制.

主要成果:

从AD模型和患者的微质中发现了升高的circDlg1水平.
在微质中抑制circDlg1改善了粉样β (Aβ) 清除,减少了神经炎症,并在AD小鼠中改善了认知功能.
发现circDlg1通过抑制其与Smurf2的相互作用来稳定PDE4B蛋白,从而降低cAMP水平和激活PKA/CREB抗炎途径.

结论:

新型circRNA,circDlg1,在微质上升调节,通过调节PDE4B蛋白稳定性,有助于AD中神经炎症.
低调微质环Dlg1促进微质对Aβ沉积的保护性反应,并缓解神经炎症.
向微质环Dlg1代表了阿尔茨海默病的潜在治疗策略.

关键词:

阿尔茨海默病的疾病阿尔茨海默病的疾病.环Dlg1 的情况.微质细胞激活活动神经炎症是一种神经炎症.基化酶 4b 是一种

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