10.1021/pr5011718.s003 Yunli Hu Yunli Hu Anoop Mayampurath Anoop Mayampurath Saira Khan Saira Khan Joanna K. Cohen Joanna K. Cohen Yehia Mechref Yehia Mechref Samuel L. Volchenboum Samuel L. Volchenboum N‑Linked Glycan Profiling in Neuroblastoma Cell Lines American Chemical Society 2015 bioinformatics analysis 16 glycans marker candidates sugar abundance protein residues glycosylation NLF protein modification neuroblastoma risk diagnosis sialylated glycan structures Neuroblastoma Cell LinesAlthough MYCN amplification results offer clues glycomic markers monosaccharide count SY 5Y samples nonsialylated glycans proteomic studies precancerous conditions 2015-05-01 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/N_Linked_Glycan_Profiling_in_Neuroblastoma_Cell_Lines/2171125 Although <i>MYCN</i> amplification has been associated with aggressive neuroblastoma, the molecular mechanisms that differentiate low-risk, <i>MYCN</i>-nonamplified neuroblastoma from high-risk, <i>MYCN</i>-amplified disease are largely unknown. Genomic and proteomic studies have been limited in discerning differences in signaling pathways that account for this heterogeneity. N-Linked glycosylation is a common protein modification resulting from the attachment of sugars to protein residues and is important in cell signaling and immune response. Aberrant N-linked glycosylation has been routinely linked to various cancers. In particular, glycomic markers have often proven to be useful in distinguishing cancers from precancerous conditions. Here, we perform a systematic comparison of N-linked glycomic variation between <i>MYCN</i>-nonamplified SY5Y and <i>MYCN</i>-amplified NLF cell lines with the aim of identifying changes in sugar abundance linked to high-risk neuroblastoma. Through a combination of liquid chromatography–mass spectrometry and bioinformatics analysis, we identified 16 glycans that show a statistically significant change in abundance between NLF and SY5Y samples. Closer examination revealed the preference for larger (in terms of total monosaccharide count) and more sialylated glycan structures in the <i>MYCN</i>-amplified samples in comparison to smaller, nonsialylated glycans that are more dominant in the <i>MYCN</i>-nonamplified samples. These results offer clues for deriving marker candidates for accurate neuroblastoma risk diagnosis.