大脑α-托科菲罗尔立体同位素配置和百岁老年人大脑衰老的标志之间的关联
Jia Pei Chan1, Jirayu Tanprasertsuk2, Elizabeth J Johnson2
1Abbott Nutrition, Columbus, OH 43219, USA.
Antioxidants (Basel, Switzerland)
|August 29, 2024
概括
大脑是大脑的大脑.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 老年学是指老年学的学科.
背景情况:
- 之前的研究表明,在百岁以上的人群中,大脑α-托科菲罗尔 (αT) 度和神经纤维状 (NFT) 计数之间存在反向关系.
- 天然 (RRR-αT) 与合成 (RSS-αT) αT立体异构体对这种关联的具体贡献仍然不清楚.
研究的目的:
- 在百岁老人中,研究皮层 (TC) 中不同αT立体同位素与阿尔茨海默病的神经病理标记物,包括粉样质斑块 (DP,NP) 和NFT之间的相关性.
- 在这个群体中探索αT立体异构体,体重指数 (BMI) 和死前认知功能之间的关系.
主要方法:
- 在47名百岁老人皮层中量化αT类立体异构体 (RRR-αT和RSS-αT).
- 对αT立体异构体水平与7个大脑区域的扩散性斑块 (DP),神经质斑块 (NP) 和神经纤维结 (NFT) 数量的相关性分析.
- 评估与死亡前全球认知和身体质量指数 (BMI) 的关联.
主要成果:
- 在大多数受试者中,自然的RRR-αT是占主导地位的立体同位素 (>50%的总αT).
- %RRR-αT显示了与前皮层 (FC) 和TC的DP的反相关性.
- %RSS-αT与TC中的DP和FC,TC和杏仁体中的NFT正相关.
- 无论是RRR-αT还是RSS-αT都与死亡前的全球认知无关.
- 体重指数与%RRR-αT和%RSS-αT相关.
结论:
- 特定αT立体异构体的脑积累,特别是合成的RSS-αT,与百岁老人的粉样质斑块和神经纤维质的数量增加有关.
- 这些发现表明,αT立体同位素配置,而不是总的αT度,可能会影响阿尔茨海默氏症的神经病理.
- 需要进一步的研究来证实这些结果,并阐明BMI的潜在调解作用.
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