在人类结石中,稳定同位素的自然变异
Jinke Liu1,2, Guilin Han1,2, Yu Tian3
1State key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing 100083, China.
Metallomics : integrated biometal science
|November 19, 2024
概括
同位素比在结石中揭示了对其形成的新见解. 这项研究表明活跃的Mg运输和再吸收影响Mg Mg.
科学领域:
- 生物矿物化 生物矿物化
- 地质化学 地质化学
- 人类健康 人类健康 人类健康
背景情况:
- 结石影响全球超过12%的人口,形成机制尚未完全理解.
- 金属同位素分析提供了一种新的方法来研究金属的生物学作用.
- 众所周知, (Mg) 抑制结石的形成,但其确切的作用需要进一步阐明.
研究的目的:
- 首次报告人类结石中的Mg同位素比例.
- 为了研究结石形成过程中的体内Mg-同位素分离机制.
- 探索Mg的抑制作用及其同位素特征之间的关系.
主要方法:
- 在人类结石中分析Mg同位素比率 (δ26Mg).
- 实验数据与密度函数理论 (DFT) 计算的比较.
- 在体内对的运输和再吸收途径的研究.
主要成果:
- 在结石中测量的 δ26Mg 值在 -1.12‰ 到 -0.07‰ 之间,总范围为 1.05‰.
- 在结石中观察到的24Mg丰富度明显高于DFT.预测的水平.
- 在体内Mg-同位素分离与蛋白质介导的肠道吸收和脏再吸收Mg2+有关.
结论:
- 活体中Mg-同位素分离受活性Mg运输和选择性脏再吸收的影响.
- 对结石的抑制作用涉及一个阻断曲的机制.
- 加入水合减少了抑制和同位素歧视,提供了对结石病变的洞察力.
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