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相关概念视频

Overview of Electron Microscopy01:25

Overview of Electron Microscopy

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The wavelengths of visible light ultimately limit the maximum theoretical resolution of images created by light microscopes. Most light microscopes can only magnify 1000X, and a few can magnify up to 1500X. Electrons, like electromagnetic radiation, can behave like waves, but with wavelengths of 0.005 nm, they produce significantly greater resolution up to 0.05 nm as compared to 500 nm for visible light. An electron microscope (EM) can create a sharp image that is magnified up to 2,000,000X.
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Immunogold Electron Microscopy01:20

Immunogold Electron Microscopy

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Immunoelectron microscopy utilizes immunogold labeling of endogenous proteins with specific antibodies to detect and localize these proteins in cells and tissues. The procedure provides insights into the distribution and quantification of protein under different stimulation conditions offering clues about their functions. Conjugating highly electron-dense gold particles with primary or secondary antibodies allow antigen detection on and within cells, with high resolution and specificity.
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相关实验视频

Updated: May 30, 2025

Digital Droplet PCR Method for the Quantification of AAV Transduction Efficiency in Murine Retina
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低压电子显微镜:用于AAV表征的新兴工具.

Kevin D Ausman1, Neal Whitaker2, Madhumitha Balasubramanian2

  • 1Spark Therapeutics, Inc., 3025 Market Street, Philadelphia, PA 19104, United States.

Journal of pharmaceutical sciences
|January 30, 2025
PubMed
概括

低压电子显微镜为表征腺相关病毒 (AAV) 基因疗法产品提供了具有成本效益的替代方案. 这种方法提供了准确的空/满分析和洞察体完整性的洞察力,使更多的研究人员可以使用它.

关键词:
腺相关病毒 (AAV)聚合 聚合 聚合 聚合 聚合生物制药特征的表征提供DNA DNA交付基因治疗是一种基因疗法.基因载体 (基因载体)图像分析 图像分析图像制造方法 (图像制造)物理特征 物理特征病毒载体 (病毒载体)

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相关实验视频

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科学领域:

  • 生物技术是生物技术.
  • 显微镜的使用方法
  • 基因治疗 基因治疗

背景情况:

  • 传输电子显微镜 (TEM) 对于表征腺相关病毒 (AAV) 基因治疗产品至关重要.
  • 高成本和专业知识要求限制了许多公司使用传统的TEM系统的机会.
  • 需要在AAV基因治疗中使用更容易获得和更实惠的表征方法.

研究的目的:

  • 评估低电压电子显微镜 (LVEM) 对AAV特征的实用性.
  • 为了证明LVEM在分析空/满封体,不完整封体和聚合物的有效性.
  • 将LVEM结果与传统的TEM和其他行业标准方法进行比较.

主要方法:

  • 使用低压电子显微镜 (LVEM) 进行AAV样本分析.
  • 使用LVEM进行了空/满封面比率的确定.
  • 研究破碎/不完整的头形态和聚合现象.
  • 用直角方法和传统的TEM方法比较LVEM的发现.

主要成果:

  • LVEM空/满分析结果与已建立的直角方法有很强的一致性.
  • LVEM提供了对不完整囊聚合的机制的见解,表明了边缘被动化.
  • LVEM证明了其在描述各种AAV属性的能力,包括聚合物和高分子量物种.
  • 成功建立了使用LVEM的AAV准备的综合分析框架.

结论:

  • LVEM是一种可行的,成本效益高的替代传统的TEM用于AAV的表征.
  • LVEM 促进了对 AAV 体完整性和产品异质性的详细分析.
  • 已建立的LVEM方法支持对AAV基因疗法产品进行强有力的质量控制.