螺旋式硫-γ-AA,通过识别Aβ螺旋来调节Aβ寡合化和细胞毒性
Heng Liu1, Yunpeng Cui1, Xue Zhao1
1Department of Chemistry, University of South Florida, Tampa, FL 33620.
概括
通过稳定其α-螺旋结构,新型的硫基--AA螺旋阻碍了粉样β (Aβ) 聚合. 这些化合物抑制Aβ寡合和纤维化,从Aβ诱导的毒性中拯救细胞.
科学领域:
- 生物化学 生物化学
- 神经科学是一个神经科学.
- 酸科学 酸科学
背景情况:
- 粉样蛋白-β (Aβ) 聚合成神经毒性β片是阿尔茨海默病的核心.
- 目前的策略经常使用β-sheet模仿剂来抑制Aβ纤维的生长.
研究的目的:
- 设计和评估作为Aβ聚合抑制剂的硫基-γ-AA.
- 为了稳定Aβ的原生α-螺旋形状,并防止β-片的形成.
主要方法:
- 粉样蛋白动力学测定测试
- 传输电子显微镜 (TEM) 的使用
- 循环二重化 (CD) 光谱法 循环二重化 (CD) 光谱法
- 2D-NMR光谱学是一种2D-NMR光谱学.
- 电子喷射电离-离子移动性光谱学-质谱学 (ESI-IMS-MS) 的应用.
- 同焦点显微镜的共聚焦显微镜
- 细胞活力测定试验
主要成果:
- 硫-γ-AA,特别是Ab-6,在剂量取决的方式有效地预防和逆转Aβ寡合和纤维化.
- Ab-6与Aβ42结合,诱导α螺旋形态,并通过非结合性机制抑制聚合物形成.
- Ab-6从Aβ诱导的细胞毒性中拯救了神经母细胞瘤细胞,可能是通过保护线粒体功能.
结论:
- 螺旋式模仿剂,如硫-γ-AA,可以将Aβ聚合转向无毒的螺旋结构.
- 这种方法为防止Aβ寡合化,纤维化和相关的神经毒性提供了一种新的策略.
更多相关视频
06:40Quantitative Measurement of γ-Secretase-mediated Amyloid Precursor Protein and Notch Cleavage in Cell-based Luciferase Reporter Assay Platforms
Published on: January 25, 2018
6.8K
04:41Preparation of Oligomeric β-amyloid1-42 and Induction of Synaptic Plasticity Impairment on Hippocampal Slices
Published on: July 14, 2010
23.2K
相关概念视频
Amyloid Fibrils
9.5K
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
9.5K
Protein Folding
8.0K
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
8.0K
