从l-histidine构建的Pleiotropic纳米结构显示出具有生物相关的多催化活动
Kailash Prasad Prajapati1, Shikha Mittal1, Masihuzzaman Ansari1
1Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India.
ACS applied materials & interfaces
|April 2, 2024
概括
过多的histidine形成有毒的粉样纳米纤维,通过促进氧化和蛋白质聚合,损害大脑细胞. 这一发现揭示了胺血症的原因.
科学领域:
- 生物化学 生化学
- 神经科学是一个神经科学.
- 材料科学 材料科学 材料科学
背景情况:
- 氨酸对新陈代谢至关重要,但其过量会导致具有未知的神经机制的氨酸血症.
- 胰腺血症与行为异常,发育迟缓和神经障碍有关.
研究的目的:
- 为了阐明背后的分子机制与histidine相关的大脑并发症.
- 研究histidine的自我组装特性及其对生物的影响.
主要方法:
- 研究了histidine自我组装动力学,受Mg (II) 和Co (II) 离子的青.
- 利用分子动力学来分析驱动纳米纤维形成的非对应相互作用.
- 在基于细胞的测定和蛋白质交叉播种反应中研究了histidine纳米纤维细胞毒性和催化活性.
主要成果:
- 伊斯蒂丁自组装成细胞毒性,具有催化活性的粉样纳米纤维.
- 这些纳米纤维诱导像Aβ1-42这样的蛋白质和大脑组件中的粉样蛋白交叉播种.
- 希斯蒂丁纳米纤维表现出氧化酶活性,增强神经递质氧化,并通过死亡和亡引起细胞死亡.
结论:
- 氨酸纳米纤维为氨酸血症引起的神经复杂症提供了一个分子机制.
- 这些发现对理解与胺相关的疾病以及开发新生物材料具有重要意义.
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