Magnify is a universal molecular anchoring strategy for expansion microscopy.

Magnify is a universal molecular anchoring strategy for expansion microscopy.
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Magnify是一种用于膨胀显微术的通用分子锚定策略。

DOI:
10.1038/s41587-022-01546-1
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发表时间:
2023-06
影响因子:
46.9
通讯作者:
Zhao, Yongxin
Zhao, Yongxin
中科院分区:
工程技术1区
文献类型:
--
作者:
Klimas, Aleksandra;Gallagher, Brendan R.;Wijesekara, Piyumi;Fekir, Sinda;DiBernardo, Emma F.;Cheng, Zhangyu;Stolz, Donna B.;Cambi, Franca;Watkins, Simon C.;Brody, Steven L.;Horani, Amjad;Barth, Alison L.;Moore, Christopher I.;Ren, Xi;Zhao, Yongxin

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膨胀显微镜通过物理和各向同性地放大嵌入交联水膨胀水凝胶中的保存生物标本,可以使用传统显微镜进行纳米成像。目前的扩展显微镜方案需要预先用反应性锚定化学物质进行处理,以将特定的标签和生物分子类别连接到凝胶上。我们描述了一种名为 Magnify 的策略,它使用机械坚固的凝胶来保留核酸、蛋白质和脂质,而不需要单独的锚定步骤。 Magnify 可将生物样本放大多达 11 倍,并在传统光学显微镜上使用约 280 nm 的衍射极限物镜,以约 25 nm 的有效分辨率对细胞和组织进行成像,如果与超分辨率光学波动成像相结合,则可实现约 15 nm 的有效分辨率。我们在广泛的生物样本上展示了 Magnify,提供了对纳米级亚细胞结构的深入了解,包括来自小鼠大脑的突触蛋白、福尔马林固定石蜡包埋的人肾中的足细胞足突以及药物处理的人肺类器官中的纤毛和基体缺陷。使用凝胶锚定分子的膨胀显微镜能够同时保留不同组织类型中的核酸、蛋白质和脂质。
Expansion microscopy enables nanoimaging with conventional microscopes by physically and isotropically magnifying preserved biological specimens embedded in a crosslinked water-swellable hydrogel. Current expansion microscopy protocols require prior treatment with reactive anchoring chemicals to link specific labels and biomolecule classes to the gel. We describe a strategy called Magnify, which uses a mechanically sturdy gel that retains nucleic acids, proteins and lipids without the need for a separate anchoring step. Magnify expands biological specimens up to 11 times and facilitates imaging of cells and tissues with effectively around 25-nm resolution using a diffraction-limited objective lens of about 280 nm on conventional optical microscopes or with around 15 nm effective resolution if combined with super-resolution optical fluctuation imaging. We demonstrate Magnify on a broad range of biological specimens, providing insight into nanoscopic subcellular structures, including synaptic proteins from mouse brain, podocyte foot processes in formalin-fixed paraffin-embedded human kidney and defects in cilia and basal bodies in drug-treated human lung organoids. Expansion microscopy with gel-anchored molecules enables simultaneous retention of nucleic acids, proteins and lipids in diverse tissue types.
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