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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: May 4, 2026

Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers
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Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers

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高空间分辨率的深层组织转录和亚细胞成像

Valentina Gandin1, Jun Kim1, Liang-Zhong Yang1

  • 1Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA.

Science (New York, N.Y.)
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概括
此摘要是机器生成的。

新的循环杂交连锁反应 (cycleHCR) 成像克服了有限的光通道,用于生物样本中RNA和蛋白质的详细空间分析,从而使深层组织研究成为可能.

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Author Spotlight: Investigating mRNA Spatial Distribution in Drosophila Muscle Tissue
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Last Updated: May 4, 2026

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Spatial Profiling of Protein and RNA Expression in Tissue: An Approach to Fine-Tune Virtual Microdissection
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Author Spotlight: Investigating mRNA Spatial Distribution in Drosophila Muscle Tissue
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科学领域:

  • 分子生物学
  • 显微镜技术
  • 基因组学

背景情况:

  • 传统的光显微镜受限于可用的颜色通道数量,限制了多个目标的同时空间分析.
  • 在复杂的生物系统中分析RNA和蛋白质的空间组织需要先进的成像方法.

研究的目的:

  • 引入和验证循环杂交链反应 (循环HCR) 作为一种高度多重化的RNA和蛋白质成像的新方法.
  • 展示循环HCR在整个胚胎和亚细胞结构中的3D空间分析的能力.

主要方法:

  • 通过将多循环DNA条码与杂交连锁反应 (HCR) 结合而开发的循环HCR.
  • 将循环HCR应用于整个胚胎转录组图像,并将其与扩展显微镜相结合,以获得亚细胞分辨率.
  • 在小鼠海马片中利用循环HCR进行多重RNA和蛋白质成像.

主要成果:

  • 在整个胚胎中实现精确的3D基因表达和细胞命运映射 (~310微米深).
  • 使用循环HCR和扩展显微镜在小鼠胚胎纤维细胞中揭示了复杂的亚细胞结构 (10种).
  • 在小鼠海马片中发现复杂的基因表达梯度和细胞类型特定的核变异.

结论:

  • 循环HCR提供了一个多功能和定量框架,用于阐明深层组织的空间调节.
  • 这种方法克服了传统光显微镜用于多重成像的局限性.
  • 对于生物研究和诊断应用而言, cycleHCR具有显著的潜力.