Non-reversible tissue fixation retains extracellular vesicles for in situ imaging.

Non-reversible tissue fixation retains extracellular vesicles for in situ imaging.
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DOI:
10.1038/s41592-019-0623-4
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发表时间:
2019-12
期刊:
影响因子:
48
通讯作者:
Pena, John T. G.
Pena, John T. G.
中科院分区:
生物学1区
文献类型:
--
作者:
Gupta, Mrinali P.;Tandalam, Sangeetha;Ostrager, Shariss;Lever, Alexander S.;Fung, Angus R.;Hurley, David D.;Alegre, Gemstonn B.;Espinal, Jasmin E.;Remmel, H. Lawrence;Mukherjee, Sushmita;Levine, Benjamin M.;Robins, Russell P.;Molina, Henrik;Dill, Brian D.;Kenific, Candia M.;Tuschl, Thomas;Lyden, David;D'Amico, Donald J.;Pena, John T. G.

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细胞外囊泡(EVs)是一种具有多种生物学功能和广泛病理关联的分泌纳米级颗粒。了解EVs在正常和病变标本中的作用的主要技术限制是无法可视化EVs在组织微环境中的空间定位。在这里,我们使用牛眼组织,玻璃体,作为模型系统来研究EV成像。我们发现,与传统甲醛溶液交联的哺乳动物组织会导致显著的EV损失,随后EV信号减少或为负;然而,可以通过额外固定1-乙基-3-(3-二甲氨基丙基)碳二亚胺(EDC)来防止EV逃逸,EDC永久固定这些纳米级颗粒,并允许在正常和癌症组织中原位可视化EV。
Extracellular vesicles (EVs) are secreted nanosized particles with many biological functions and a broad range of pathological associations. A major technical limitation to understanding the role of EVs in normal and diseased specimens has been the inability to visualize the spatial localization of EVs in tissue microenvironments. Here, we use bovine ocular tissue, the vitreous humor, as a model system to study EV imaging. We show that mammalian tissues crosslinked with conventional formaldehyde solutions result in significant EV loss, with subsequent reduced or negative EV signals; however, EV escape can be prevented by additional fixation with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) that permanently holds these nano-sized particles and allows for visualization of EVs in normal and cancer tissues in situ.
通过影响细胞粘附的单克隆抗体的神经rest迁移的改变。
DOI: 10.1083/jcb.101.2.610
发表时间: 1985-08
期刊: The Journal of cell biology
影响因子: --
作者:
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发表时间: 1998-03-01
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