在5xFAD老年小鼠的认知衰退,Aβ病理和血脑屏障功能
Geetika Nehra1, Sasivimon Promsan1,2, Ruedeemars Yubolphan3,4
1Sanders-Brown Center On Aging, University of Kentucky, 760 Press Ave, 124 HKRB, Lexington, KY, 40536-0679, USA.
Fluids and barriers of the CNS
|March 27, 2024
概括
老龄化加剧了5xFAD小鼠的阿尔茨海默病 (AD) 病理,增加了粉样β (Aβ) 水平和空间记忆缺陷. 然而,在这个模型中,血脑屏障的功能并没有随着年龄的增长而显著改变.
科学领域:
- 神经科学是一个神经科学.
- 衰老研究研究 衰老研究
- 阿尔茨海默氏症疾病的发病因子
背景情况:
- 阿尔茨海默病 (AD) 的特点是渐进的认知衰退和血脑屏障 (BBB) 功能障碍.
- 在AD模型中,衰老对粉样β (Aβ) 病理,BBB完整性和认知功能的影响尚未完全理解.
研究的目的:
- 在AD的5xFAD小鼠模型中研究衰老对Aβ病理,BBB功能和空间记忆的影响.
- 为了确定衰老如何影响认知衰退和Aβ积累随着时间的推移.
主要方法:
- 5xFAD和野生型小鼠被老化并使用莫里斯水迷宫 (MWM) 评估空间学习和记忆.
- 在体内使用光德克斯坦的双光子显微镜,通过测量容器直径和德克斯坦分布来评估BBB完整性.
- 量化了大脑和血中的Aβ水平 (Aβ40和Aβ42).
主要成果:
- 5xFAD小鼠表现出与年龄相关的空间记忆缺陷,老年小鼠的表现恶化.
- 在5xFAD小鼠中,大脑Aβ40和Aβ42水平以及血Aβ40随年龄显著增加.
- 在年轻和5xFAD老鼠之间或与年龄相匹配的野生类型对照相比,没有观察到BBB完整性标记 (血管直径,右强度) 的显著差异.
结论:
- 在5xFAD小鼠中,衰老加剧了空间记忆障碍和Aβ积累.
- 目前的成像方法在这个模型中没有检测到与年龄相关的BBB完整性的变化.
- 需要使用先进的成像和较小的标记器进行进一步的研究,以评估老年AD模型中微妙的BBB变化.
关键词:
在Pde6b rd15xFADAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5xFAD 5XFAD 5XFAD 5XFAD 5XFAD 5XFAD 5XFAD 5XFAD 5XFAD 5XFAD 5XFAD 5XFD亚博体育在线娱乐 亚博体育在线娱乐血液-大脑屏障 血液-大脑屏障更多相关视频
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