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Título: | Nitric oxide changes distinct aspects of the glycophenotype of human neuroblastoma NB69 cells |
Autor: | Wouwer, Marlies van de CSIC; André, Sabine; Gabius, Hans-Joachim; Villalobo, Antonio CSIC ORCID | Fecha de publicación: | 2011 | Editor: | Elsevier | Citación: | Nitric Oxide 24(2): 91-101 (2011) | Resumen: | It is an open question whether the presence of nitric oxide (NO) affects the cell glycophenotype. A panel of six plant lectins was used in this study to monitor distinct aspects of cell surface glycosylation under nitrosative stress. We determined that treating human neuroblastoma NB69 cells with the long-lived NO donor 2,2'-(hydroxynitrosohydrazono)bis-ethanimine (DETA/NO) and monitoring the non-apoptotic adherent cell population significantly increases the presentation of N-glycans as detected by concanavalin A. Examining fine-structural features, bisected N-glycans and branch-end tailoring including ¿2,6-sialylation were found to be enhanced. Confocal fluorescence microscopy and cell permeabilization experiments pointed to a major effect of NO on the extent of cell surface N-glycan presentation. We also show that NO increases the level of protein O-GlcNAcylation, a multifunctional post-translational modification. Our results thus establish the first evidence for NO as modulator of distinct aspects of cell glycosylation. | URI: | http://hdl.handle.net/10261/77185 | DOI: | 10.1016/j.niox.2010.12.007 | Identificadores: | doi: 10.1016/j.niox.2010.12.007 issn: 1089-8603 |
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