Abundance-Ratio-Based Semiquantitative Analysis of Site-Specific N-Linked Glycopeptides Present in the Plasma of Hepatocellular Carcinoma Patients
Male
Proteomics
0301 basic medicine
Glycomics/methods
Vitronectin/metabolism
Tandem Mass Spectrometry
Glycopeptides/metabolism*
Tumor/metabolism
HCC
Hepatocellular/blood
Glycomics
Chromatography
Liquid
Liver Neoplasms/blood
Liver Neoplasms
Glycopeptides
Middle Aged
Vitronectin/blood
haptoglobin
3. Good health
Polysaccharides/metabolism*
Tumor/blood
Proteomics/methods
Adult
Carcinoma, Hepatocellular
Molecular Sequence Data
Liver Neoplasms/metabolism*
vitronectin
Glycopeptides/chemistry
03 medical and health sciences
Hepatocellular/pathology
Polysaccharides
Biomarkers, Tumor
Humans
Amino Acid Sequence
Vitronectin
Aged
Neoplasm Staging
Binding Sites
Carcinoma
N-linked glycopeptides
Reproducibility of Results
Liver Neoplasms/pathology
quantification
TMT
Polysaccharides/blood
Glycopeptides/blood
Biomarkers
Hepatocellular/metabolism*
Chromatography, Liquid
DOI:
10.1021/pr4011519
Publication Date:
2014-03-17T10:45:53Z
AUTHORS (9)
ABSTRACT
Aberrant structures of site-specific N-linked glycans are closely associated with the tumorigenesis of hepatocellular carcinoma (HCC), one of the most common fatal cancers worldwide. Vitronectin (VTN) is considered a candidate glycobiomarker of HCC. In this study, we describe a reliable and simple quantification strategy based on abundance ratios of site-specific N-linked glycopeptides of VTN to screen for potential biomarkers. A total of 14 unique N-linked glycans corresponding to 27 unique N-linked glycopeptides were characterized at three N-linked sites (Asn-86, -169, and -242) present in VTN. These glycans could be good candidate markers for HCC. Among these glycans, the abundance ratio of two representative glycoforms (fucosyl vs non-fucosyl) was significantly increased in HCC plasma relative to normal plasma. This strategy was also successfully applied to another potential HCC biomarker, haptoglobin. Furthermore, we demonstrate that our approach employing tandem mass tag (TMT) and target N-linked glycopeptides of VTN is a useful tool for quantifying specific glycans in HCC plasma relative to normal plasma. Our strategy represents a simple and potentially useful screening platform for the discovery of cancer-specific glycobiomarkers.
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CITATIONS (36)
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