基础科学和病原发生学
Olga Minaeva1, Kevin P Kotredes2, Juliet A Moncaster1
1Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 23, 2025
概括
在长期暴露后,,和等环境毒素在小鼠的大脑和血液中积累. 这项研究证明了它们在大脑区域的检测和映射,突出显示了毒素暴露与阿尔茨海默病风险之间的联系.
科学领域:
- 神经科学是一个神经科学.
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
背景情况:
- 阿尔茨海默病 (AD) 和相关的痴呆症 (ADRD) 受年龄,遗传和环境暴露的影响.
- 包括 (Pb), (Cd) 和 (As) 在内的环境有毒物质对公众健康构成重大风险,不成比例地影响弱势群体.
- 这项研究探讨了这些神经毒剂改变AD相关基因表达并增强AD病理生物学的假设.
研究的目的:
- 研究长期暴露后小鼠大脑中 (Pb), (Cd) 和 (As) 的积累和区域分布.
- 为了利用激光剥离感应合等离子体质谱 (LA-ICP-MS) 成像用于多元元素大脑映射和超微元素量化.
- 建立环境毒素暴露和潜在的阿尔茨海默氏症病理生物学之间的联系.
主要方法:
- 模型AD小鼠在饮用水中暴露于Pb,Cd或As30天.
- 通过诱导合血质谱法 (ICP-MS) 分析大脑和血液样本以进行元素定量.
- LA-ICP-MS成像用于精确的解剖定位和绘制脑组织中神经毒剂积累的地图.
主要成果:
- 在30天暴露在流行病学相关水平后,在小鼠大脑和血液中观察到Pb,Cd和As的强烈吸收.
- 在A,Cd和Pb的大脑和血液水平之间发现了强烈的相关性.
- LA-ICP-MS测绘显示,神经毒剂在不同的大脑区域 (包括海马和皮质) 积累了非均的,元素特异性的神经毒剂.
结论:
- 暴露在Pb,Cd或As中的AD模型小鼠会在血液和大脑中积累这些神经毒剂.
- ICP-MS溶液分析和LA-ICP-MS成像有效地检测,图像和量化神经毒素积累.
- 这些发现支持环境毒素在AD病理生物学中的潜在作用,需要进一步调查.
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