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Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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相关实验视频

Updated: Jun 14, 2025

Highly Multiplexed, Super-resolution Imaging of T Cells Using madSTORM
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Highly Multiplexed, Super-resolution Imaging of T Cells Using madSTORM

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用多重超分辨率光显微镜绘制核景观的地图.

Fariha Rahman, Victoria Augoustides, Emma Tyler

    bioRxiv : the preprint server for biology
    |August 30, 2024
    PubMed
    概括

    研究人员开发了一种新的成像方法来绘制核组织的地图. 这种技术揭示了活跃和抑制的核状态是如何在不同的尺度上组织的,为细胞结构提供了新的见解.

    科学领域:

    • 细胞生物学 细胞生物学
    • 分子生物学分子生物学
    • 基因组学就是基因组学.

    背景情况:

    • 细胞核协调细胞的重要功能.
    • 了解DNA,蛋白质复合体和表观遗传标记等核成分的空间组织至关重要.
    • 现有的成像技术在多个长度尺度上解决结构方面存在局限性.

    研究的目的:

    • 开发一个多重成像协议,用于高精度定位多个核目标.
    • 研究活跃和压制性的核国家空间组织.
    • 探索分子组织与核功能之间的关系.

    主要方法:

    • 开发了一个多重成像协议.
    • 在单个细胞中以纳米精度定位了13个不同的核目标.
    • 在微和纳米尺度上分析了核元件的空间相关性.

    主要成果:

    • 核状态存在于长度尺度的频谱上,具有不同的纳米级组织原则.
    • 异色素和欧色素表现出独特的纳米级组织.
    • 异染色素蛋白1-α (HP1-α) 与DNA的相关性因尺度而异.
    • RNA聚合酶II,p300和CDK9显示了规模依赖的分区.

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    Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
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    Author Spotlight: Comprehensive Epigenetic Analysis for Investigating Human Cellular Plasticity and Environmental Adaptation Using Immunofluorescence Assays
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  • 激素乙化或转录中的乱影响了纳米级组织.

    • 结论:

    • 开发的成像和分析管道为核组织提供了高分辨率的洞察力.
    • 核组织原则在微和纳米尺度上有很大的差异.
    • 这种方法可以应用于研究其他细胞区域.