放射自显影技术应用的现状及未来趋势
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中国科学院生物物理研究所,蛋白质科学技术平台,北京 100101

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Tel: 010-64888421, E-mail: hjzhang@ibp.ac.cnTel: 86-10-64888421, E-mail: hjzhang@ibp.ac.cn

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Biological Applications of Autoradiography: Present and Future
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The Core Facility for Protein Research, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China

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    摘要:

    放射自显影通常指结合了放射标记探针的分子或组织通过感光材料(如X光胶片)曝光、显影、定影获得金属银颗粒图像的实验技术,它是定性、定量分析与探针结合的靶分子含量及其在组织中分布的传统手段,在生物学基础研究以及临床前新药研究等方面有着广泛的应用。近年来磷屏成像技术的普及显著缩短了放射自显影技术的实验周期,并拓展了在短半衰期正电子放射核素中的应用。本文重点介绍放射自显影技术应用中尚不能全面被非放射性替代技术取代的一些实验工作进展,主要包括某些酶活性的测定、磷酸化位点分析、低丰度核酸检测以及与放射性探针特异结合的靶点(如受体等)在组织中的分布等实验技术工作。适应当前应用趋势的变化对放射示踪共用技术平台的建设,对帮助技术支撑人员提供更好的、具有针对性的技术性服务具有一定的指导意义。

    Abstract:

    Autoradiography generally involves in metallic silver stain formation through irradiation to photosensitive materials (such as X-ray film) with further development and fixation steps using a radiolabeled probe, and the stain density indicates the relative amount of its target molecules and its distribution in tissue slices. This traditional method has a wide range of applications both in biological studies and preclinical drug researches. Phosphor film imaging has significantly shortened the autoradiography’s experimental intervals, and the positron nuclides with short-half-lives can also be performed. The purpose of this paper focuses on the frontier of some experimental works that can’t be completely replaced by non-radioactive labeled methods, such as some enzymatic activity assays, protein or peptide phosphorylation site analyses, nucleic acid assays with low concentrations, and the target (such as receptors) molecule distributions in tissue slices by radiolabeled selective ligands. Thus the technological platform should be reformulated to adapt to the current trends of experimental works.

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张洪杰.放射自显影技术应用的现状及未来趋势[J].生物化学与生物物理进展,2023,50(5):1077-1087

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  • 收稿日期:2023-03-03
  • 最后修改日期:2023-04-03
  • 接受日期:2023-04-03
  • 在线发布日期: 2023-05-11
  • 出版日期: 2023-05-20