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Helical organization of microtubules occurs in a minority of tunneling membrane nanotubes in normal and cancer urothelial cells [Elektronski vir]Resnik, Nataša ...Tunneling membrane nanotubes (TnTs) are membrane protrusions connecting nearby or distant cells in vitro and in vivo. Functions of TnTs in cellular processes are various and rely on TnT structure, ... which also depends on cytoskeletal composition. In the present study, we focused on the organization of microtubules (MTs) and intermediate filaments (IFs) in TnTs of urothelial cells. We analysed TnTs of normal porcine urothelial cells, which morphologically and physiologically closely resemble normal human urothelial cells, and of cancer cells derived from invasive human urothelial neoplasm. Wide-field fluorescence, confocal and super-resolution microscopy techniques, together with image analyses and 3D reconstructions enlightened specific MT-IF organization in TnTs, and for the first time revealed that MTs and IFs co-occur in the majority of normal and cancer urothelial cell TnTs. Our findings show that in the initiation segment of TnTs, MTs are cross-linked with each other into filamentous network, however in the middle and the attaching segment of TnT, MTs can helically enwrap IFs, the phenomenon that has not been shown before within the TnTs. In this study, we assess MT-IF co-occurrence in TnTs and present evidence that such helical organization of MTs enwrapping IFs is only occurring in a minority of the TnTs. We also discuss the possible cell-biological and physiological reasons for helical organization of MTs in TnTs.Source: Scientific reports [Elektronski vir]. - ISSN 2045-2322 (Vol. 8, Nov. 2018, str. 1-8)Type of material - e-article ; adult, seriousPublish date - 2018Language - englishCOBISS.SI-ID - 34052057
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Resnik, Nataša | 28393 |
Prezelj, Tim | |
Luca, Giulia M. R. de | |
Manders, Erik | |
Polishchuk, Roman S. | |
Veranič, Peter | 08279 |
Erdani-Kreft, Mateja | 15873 |
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