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分子伴侣对淀粉样蛋白的抑制作用可转化为阿尔茨海默病的病理变化。

Amyloid inhibition by molecular chaperones can be translated to Alzheimer's pathology .

作者信息

Abelein Axel, Johansson Jan

机构信息

Department of Biosciences and Nutrition, Karolinska Institutet 141 83 Huddinge Sweden

出版信息

RSC Med Chem. 2023 Mar 21;14(5):848-857. doi: 10.1039/d3md00040k. eCollection 2023 May 25.

Abstract

Molecular chaperones are important components in the cellular quality-control machinery and increasing evidence points to potential new roles for them as suppressors of amyloid formation in neurodegenerative diseases, such as Alzheimer's disease. Approaches to treat Alzheimer's disease have not yet resulted in an effective treatment, suggesting that alternative strategies may be useful. Here, we discuss new treatment approaches based on molecular chaperones that inhibit amyloid-β (Aβ) aggregation by different microscopic mechanisms of action. Molecular chaperones that specifically target secondary nucleation reactions during Aβ aggregation - a process closely associated with Aβ oligomer generation - have shown promising results in animal treatment studies. The inhibition of Aβ oligomer generation seemingly correlates with the effects of treatment, giving indirect clues about the molecular mechanisms present . Interestingly, recent immunotherapy advances, which have demonstrated significant improvements in clinical phase III trials, have used antibodies that selectively act against Aβ oligomer formation, supporting the notion that specific inhibition of Aβ neurotoxicity is more rewarding than reducing overall amyloid fibril formation. Hence, specific modulation of chaperone activity represents a promising new strategy for treatment of neurodegenerative disorders.

摘要

分子伴侣是细胞质量控制机制中的重要组成部分,越来越多的证据表明它们在神经退行性疾病(如阿尔茨海默病)中作为淀粉样蛋白形成的抑制剂具有潜在的新作用。治疗阿尔茨海默病的方法尚未产生有效的治疗效果,这表明替代策略可能会有所帮助。在这里,我们讨论基于分子伴侣的新治疗方法,这些分子伴侣通过不同的微观作用机制抑制淀粉样β(Aβ)聚集。在Aβ聚集过程中特异性靶向二次成核反应(这一过程与Aβ寡聚体的产生密切相关)的分子伴侣在动物治疗研究中已显示出有前景的结果。Aβ寡聚体产生的抑制似乎与治疗效果相关,这为存在的分子机制提供了间接线索。有趣的是,最近免疫疗法的进展在III期临床试验中已显示出显著改善,这些进展使用了选择性作用于Aβ寡聚体形成的抗体,支持了这样一种观点,即特异性抑制Aβ神经毒性比减少整体淀粉样纤维形成更有成效。因此,分子伴侣活性的特异性调节代表了一种有前景的治疗神经退行性疾病的新策略。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/540f/10211315/89ae1ded871a/d3md00040k-f1.jpg

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