NDLI: The structure of the oligosaccharides of N-cadherin from human melanoma cell lines

Content Provider	Springer Nature Link
Author	Ciołczyk Wierzbicka, Dorota Amoresa, Angela Casbarra, Annarita Hoja Łukowicz, Dorota Lityńska, Anna Laidler, Piotr
Copyright Year	2004
Abstract	N-cadherin is calcium-dependent cell adhesion molecule that mediates cell-cell adhesion and also modulates cell migration and tumor invasion. N-cadherin is a heavily glycosylated protein. Many studies have demonstrated that malignant transformation of a number of cell types correlates with changes of cell surface N-linked oligosacharides. We have studied the carbohydrate profile of N-cadherin synthesized in human melanoma cell lines and the effect of this protein and complex N-glycans on in vitro migration of melanoma cells from the primary tumor site—WM35 and from different metastatic sites WM239 (skin), WM9 (lymph node), and A375 (solid tumor). N-cadherin was immunoprecipitated with anti-human N-cadherin polyclonal antibodies. Characterization of its carbohydrate moieties was carried out by SDS-PAGE electrophoresis and blotting, followed by immunochemical identification of the N-cadherin polypeptides and on-blot deglycosylation using PNGase F for glycan release. N-glycans were separated by matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) and their structures identified by the computer matching of the resulting masses with those derived from a sequence database. The assay of in vitro chemotaxic cell migration was performed using QCM™ Cell Invasion Assay (Chemicon).N-cadherin from WM35 (primary tumor site) possessed high-mannose and biantennary complex type glycans with α2–6 linked sialic acid. N-cadherin from WM239, WM9, and A375 cell lines possessed mostly tri- or tetra-antennary complex type glycans. In addition, N-cadherin from WM9 (lymph node metastatic site) and A375 (solid tumor metastatic site) contained heavily α-fucosylated complex type chains with α2,3 linked sialic acid. Blocking of N-cadherin-mediated intercellular interaction by N-cadherin-specific antibodies significantly (of about 40%) inhibited migration of melanoma cells. Inhibition of synthesis of complex type N-glycans by swainsonine (mannosidase II inhibitor) led to 50% decrease of cell migration.The results indicated differences between N-cadherin glycans from primary and metastatic sites and confirmed influence of N-cadherin and complex -type N-glycans on in vitro migration of melanoma cells. Published in 2004.
Starting Page	483
Ending Page	492
Page Count	10
File Format	PDF
ISSN	02820080
Journal	Glycoconjugate Journal
Volume Number	20
Issue Number	7-8
e-ISSN	15734986
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2004-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pathology Biochemistry
Content Type	Text
Resource Type	Article
Subject	Cell Biology Biochemistry Molecular Biology

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