Metal imaging in neurodegenerative diseases.

Metal imaging in neurodegenerative diseases.
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DOI:
10.1039/c2mt20052j
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发表时间:
2012-08
期刊:
Metallomics : integrated biometal science
影响因子:
--
通讯作者:
Miller LM
Miller LM
中科院分区:
其他
文献类型:
--
作者:
Bourassa MW;Miller LM

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已知金属离子在许多神经退行性疾病中发挥重要作用,包括阿尔茨海默病(AD)、帕金森病(PD)、肌萎缩侧索硬化症(ALS)和朊病毒病。在这些疾病中,异常的金属结合或氧化还原活性金属离子的不当调节可以通过产生细胞毒性活性氧(ROS)来诱导氧化应激。金属稳态的改变也常见于患病状态。因此,完整生物细胞和组织中金属的成像对于了解金属在神经退行性疾病中的作用非常重要。人们已经利用了多种成像技术,包括 X 射线荧光显微镜 (XFM)、粒子诱导 X 射线发射 (PIXE)、能量色散 X 射线光谱 (EDS)、激光烧蚀电感耦合质谱 (LA-ICP-MS) 和二次离子质谱 (SIMS),所有这些技术都可以对生物中的金属进行成像。 具有高空间分辨率和检测灵敏度的标本。这些技术代表了促进对疾病机制的理解和确定开发治疗方法的可能目标的独特工具。在这篇综述中,我们将重点介绍金属成像技术促进的神经退行性疾病研究的进展。
Metal ions are known to play an important role in many neurodegenerative diseases including Alzheimer’s disease (AD), Parkinson’s disease (PD), amyotrophic lateral sclerosis (ALS), and prion diseases. In these diseases, aberrant metal binding or improper regulation of redox active metal ions can induce oxidative stress by producing cytotoxic reactive oxygen species (ROS). Altered metal homeostasis is also frequently seen in the diseased state. As a result, the imaging of metals in intact biological cells and tissues has been very important for understanding the role of metals in neurodegenerative diseases. A wide range of imaging techniques have been utilized, including X-ray fluorescence microscopy (XFM), particle induced X-ray emission (PIXE), energy dispersive X-ray spectroscopy (EDS), laser ablation inductively coupled mass spectrometry (LA-ICP-MS), and secondary ion mass spectrometry (SIMS), all of which allow for the imaging of metals in biological specimens with high spatial resolution and detection sensitivity. These techniques represent unique tools for advancing the understanding of the disease mechanisms and for identifying possible targets for developing treatments. In this review, we will highlight the advances in neurodegenerative disease research facilitated by metal imaging techniques.
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