Abstract
Modifications in cell surface glycosylation affecting cell adhesion are common characteristics of transformed cells. This study characterizes the N-glycosylation profile of E-cadherin in models of canine mammary gland adenoma and carcinoma evaluating the importance of these glycosylation modifications in the malignant phenotype. Our results show that the pattern of E-cadherin N-glycosylation in mammary carcinoma is characterized by highly branched N-glycans, increase in sialylation and an expression of few high mannose structures. Detailed mass spectrometry analysis demonstrated a new N-glycosylation site containing a potential complex type N-glycan in E-cadherin from a mammary carcinoma cell line. Our study demonstrates the importance of E-cadherin N-glycans in the process of tumor development and in the transformation to the malignant phenotype.
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