Comparative glycoproteomics based on lectins affinity capture of N-linked glycoproteins from human Chang liver cells and MHCC97-H cells

Proteomics. 2007 Jul;7(14):2358-70. doi: 10.1002/pmic.200600041.

Abstract

We present here an effective technique for the large-scale separation and identification of N-linked glycoproteins from Chang liver cells, the human normal liver cells. To enrich N-linked glycoproteins from the whole cells, a procedure containing the lysis of human liver cells, the solubilization of total proteins, lectin affinity chromatography including Concanavalin A and wheat germ agglutinin was established. Furthermore, captured N-linked glycoproteins were separated by 2-DE, and identified by MS and database searching. Finally, we found 63 N-glycoproteins in Chang liver cells. In addition, using the above method, we identified 7 remarkably up-regulated glycoproteins from MHCC97-H cells, highly metastatic liver cancer cells, compared to Chang liver cells. These up-regulated glycoproteins were associated with liver cancer and might be used as biomarkers for tumor diagnosis. Results showed that we established a high-throughput proteomic analysis for separating N-linked glycoproteins from human liver cells. This strategy greatly improved the glycoprotein analysis method associated with proteome-wide glycosylation changes related to liver cancer. Our work was part of the HUPO Human Liver Proteome Project (HLPP) studies and was supported by CHINA HUPO.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cells, Cultured
  • Chromatography, Affinity / methods*
  • Concanavalin A / metabolism*
  • Electrophoresis, Gel, Two-Dimensional
  • Glycoproteins / analysis*
  • Glycoproteins / chemistry
  • Glycoproteins / metabolism*
  • Hepatocytes / chemistry
  • Hepatocytes / metabolism*
  • Humans
  • Proteomics / methods*
  • Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
  • Up-Regulation
  • Wheat Germ Agglutinins / metabolism*

Substances

  • Glycoproteins
  • Wheat Germ Agglutinins
  • Concanavalin A