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Quantitative imaging of element spatial distribution in the brain section of a mouse model of Alzheimer's disease using synchrotron radiation X-ray fluorescence analysis

机译:使用同步辐射X射线荧光分析对阿尔茨海默氏病小鼠模型脑部元素空间分布进行定量成像

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摘要

A method for quantitative imaging of trace elements in sections of bio-tissues using synchrotron radiation microbeam X-ray fluorescence (SR-μXRF) analysis was developed. The Compton scattering in the SR-μXRF spectrum was utilized as an internal standard to compensate the differences in thickness and density of thin bio-tissue sections. The ratios of element sensitivities to Compton scattering peak obtained from two matrix-matched standard reference materials were used for the calculation of the concentrations of metals in a brain section. The concentrations of Ca, Fe, Cu and Zn in the standard reference material (GBW 08551, pig liver) determined by this method were in good agreement with the certified values. The detection limits of Ca, Fe, Cu and Zn at 2 s detection were 1.15, 0.53, 0.21, and 0.20 μg g~(-1), respectively. The method has been successfully applied in accurate and precise imaging of the element variations in the brain section of a transgenic mouse model of Alzheimer's disease.
机译:建立了一种利用同步辐射微束X射线荧光(SR-μXRF)分析对生物组织切片中微量元素进行定量成像的方法。 SR-μXRF光谱中的康普顿散射被用作内标,以补偿薄薄的生物组织切片的厚度和密度差异。从两种基质匹配的标准参比物质获得的元素敏感性与康普顿散射峰的比值用于计算脑部金属的浓度。通过该方法测定的标准参考物质(GBW 08551,猪肝)中的Ca,Fe,Cu和Zn的浓度与认证值高度吻合。钙,铁,铜和锌在2 s的检出限分别为1.15、0.53、0.21和0.20μgg〜(-1)。该方法已经成功地应用于阿尔茨海默氏病转基因小鼠模型的大脑区域中元素变化的准确和精确成像。

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  • 来源
    《Journal of Analytical Atomic Spectrometry》 |2010年第3期|328-333|共6页
  • 作者单位

    CAS Key Laboratory of Nuclear Analytical Techniques and CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China Graduate School of the Chinese Academy of Sciences, Beijing, 100049, China;

    CAS Key Laboratory of Nuclear Analytical Techniques and CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China;

    CAS Key Laboratory of Nuclear Analytical Techniques and CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China;

    School of Pharmaceutical Sciences, Jilin University, Jilin, 130021, China;

    CAS Key Laboratory of Nuclear Analytical Techniques and CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China Graduate School of the Chinese Academy of Sciences, Beijing, 100049, China;

    CAS Key Laboratory of Nuclear Analytical Techniques and CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China Graduate School of the Chinese Academy of Sciences, Beijing, 100049, China;

    CAS Key Laboratory of Nuclear Analytical Techniques and CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China;

    CAS Key Laboratory of Nuclear Analytical Techniques and CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China;

    CAS Key Laboratory of Nuclear Analytical Techniques and CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China;

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