Biogenic metallic elements in the human brain?

Biogenic metallic elements in the human brain?
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DOI:
10.1126/sciadv.abf6707
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发表时间:
2021-06
期刊:
影响因子:
13.6
通讯作者:
Telling ND
Telling ND
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Everett J;Lermyte F;Brooks J;Tjendana-Tjhin V;Plascencia-Villa G;Hands-Portman I;Donnelly JM;Billimoria K;Perry G;Zhu X;Sadler PJ;O'Connor PB;Collingwood JF;Telling ND

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在人脑中发现纳米金属 Cu0 和 Fe0 将从根本上增进我们对神经生物学的理解。铜和铁的化学反应在正常的大脑功能中起着至关重要的作用。多种含有带正电荷的 Cu+、Cu2+、Fe2+ 和 Fe3+ 的酶和蛋白质控制关键过程,催化氧化代谢以及神经递质和神经肽的产生。在这里,我们报告了在人脑中发现了元素(零氧化态)金属 Cu0 伴随着铁磁元素 Fe0。使用同步加速器 X 射线光谱显微镜在从阿尔茨海默氏病受试者中分离出的淀粉样斑块核心中鉴定出这些纳米级生物金属沉积物。金属铜和铁的纳米沉积物的表面具有高度反应性,其化学和磁性与其主要氧化物对应物明显不同。大脑中元素形式金属的发现提出了关于它们的产生及其在神经化学、神经生物学和神经退行性疾病病因学中的作用的新问题。
Discovery of nanometallic Cu0 with Fe0 in the human brain will fundamentally boost our understanding of neurobiology. The chemistry of copper and iron plays a critical role in normal brain function. A variety of enzymes and proteins containing positively charged Cu+, Cu2+, Fe2+, and Fe3+ control key processes, catalyzing oxidative metabolism and neurotransmitter and neuropeptide production. Here, we report the discovery of elemental (zero–oxidation state) metallic Cu0 accompanying ferromagnetic elemental Fe0 in the human brain. These nanoscale biometal deposits were identified within amyloid plaque cores isolated from Alzheimer’s disease subjects, using synchrotron x-ray spectromicroscopy. The surfaces of nanodeposits of metallic copper and iron are highly reactive, with distinctly different chemical and magnetic properties from their predominant oxide counterparts. The discovery of metals in their elemental form in the brain raises new questions regarding their generation and their role in neurochemistry, neurobiology, and the etiology of neurodegenerative disease.
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