首页> 美国卫生研究院文献>Cell Stress Chaperones >Membrane Hsp70-supported cell-to-cell connections via tunneling nanotubes revealed by live-cell STED nanoscopy
【2h】

Membrane Hsp70-supported cell-to-cell connections via tunneling nanotubes revealed by live-cell STED nanoscopy

机译:活细胞STED纳米技术揭示了通过隧道纳米管支持的膜Hsp70细胞间连接

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Heat shock protein Hsp70 (Hsp70) is found on the cell surface of a large variety of human and mouse tumor cell types including U87, GL261 glioblastoma, and 4T1 mammary carcinoma cells. We studied the role of membrane-bound Hsp70 (mHsp70) in the formation of cell-to-cell connections via tunneling nanotubes (TNTs) using live-cell STED nanoscopy. This technique allows the visualization of microstructures in the 100-nm range in the living cells. We could show that the presence of tumor-derived mHsp70 in TNTs with a diameter ranging from 120 to 140 nm predominantly originates from cholesterol-rich-microdomains containing the lipid compound globoyltriaosylceramide (Gb3). Under non-stress conditions, Hsp70 and Gb3 are structurally clustered in the membrane of TNTs of tumor cells that showed tumor type specific variations in the amount of cell-to-cell connection networks. Furthermore depletion of cholesterol and ionizing radiation as a stress factor results in a complete loss of Hsp70-containing TNTs.Electronic supplementary materialThe online version of this article (10.1007/s12192-018-00958-w) contains supplementary material, which is available to authorized users.
机译:在多种人类和小鼠肿瘤细胞类型(包括U87,GL261胶质母细胞瘤和4T1乳腺癌细胞)的细胞表面上发现了热激蛋白Hsp70(Hsp70)。我们使用活细胞STED纳米技术研究了膜结合的Hsp70(mHsp70)在通过隧道纳米管(TNT)形成细胞间连接中的作用。这项技术可以使活细胞中100 nm范围内的微观结构可视化。我们可以证明直径为120至140nm的TNTs中存在肿瘤来源的mHsp70,主要是来自富含脂质的泛结构域,其中包含脂质化合物globoyltriaosylceramide(Gb3)。在非应激条件下,Hsp70和Gb3在肿瘤细胞的TNT膜上结构聚簇,在细胞间连接网络的数量上显示出肿瘤类型特异性变化。此外,胆固醇的消耗和电离辐射作为压力因素会导致含Hsp70的TNT完全消失。电子补充材料本文的在线版本(10.1007 / s12192-018-00958-w)包含补充材料,可通过授权获得用户。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号