全细胞和组织的开放式体积电子显微镜图谱
C Shan Xu1, Song Pang2, Gleb Shtengel2
1Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA. xuc@janelia.hhmi.org.
Nature
|October 7, 2021
概括
研究人员创建了细胞结构的高分辨率电子显微镜 (EM) 地图. 这本全新的电磁图谱显著扩大了详细的细胞结构研究的成像能力.
科学领域:
- 细胞生物学
- 显微镜技术
背景情况:
- 了解细胞架构对于生物学见解至关重要.
- 传统的电子显微镜 (EM) 方法如薄截面EM和EM断层扫描在高分辨率可视化大细胞体积方面存在局限性.
- 聚焦离子束扫描电子显微镜 (FIB-SEM) 之前以4纳米同位素分辨率成像了小细胞体积.
研究的目的:
- 使用FIB-SEM显著增加可用4纳米同位素声波成像的细胞样本体积.
- 为细胞和组织研究建立一个基础的,开放的,高分辨率的电磁图谱.
主要方法:
- 使用先进的聚焦离子束扫描电子显微镜 (FIB-SEM) 技术.
- 提高FIB削的精度和稳定性,增强信号检测,以及更快的扫描电子显微镜 (SEM) 采集.
- 在4纳米的同位素分辨率下生成了10个全细胞和组织的3D数据集.
主要成果:
- 与之前的FIB-SEM能力相比,在4nm同位素分辨率下增加了可想象的体积.
- 开发了一个包含多种生物样本的综合体EM图谱,包括癌细胞,免疫细胞,胰岛和神经组织.
- 通过OpenOrganelle平台公开访问高分辨率数据集.
结论:
- 开发的EM图谱为细胞结构提供了前所未有的高分辨率洞察力.
- 这种资源是未来高分辨率全细胞体积电磁研究和分析的基础.
- 鼓励研究界探索该地图,并利用数据进行新的生物发现.
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