HOMEPRODUCTSCOMPANYCONTACTFAQResearchDictionaryPharmaSign Up FREE or Login

Electrophoretic analysis of four high molecular weight sialoglycoproteins produced by metastatic human colon carcinoma cells.

Abstract
We have found that polyacrylamide gel electrophoresis in 3% gels in the presence of sodium dodecyl sulfate is suitable for the separation of cellular glycoproteins having molecular weights ranging from 200,000 to 1,000,000. The gels secured on a rigid support (Gelbond) allow blotting techniques with lectins and antibodies for the detection of glycoproteins. Using these methods we have separated lysates of HT-29 human colon carcinoma cells and detected at least four distinct high molecular weight sialoglycoproteins having molecular weights of 900,000, 740,000, 560,000, and 450,000. The expression of the 900,000 component, as revealed by wheat germ agglutinin binding, was much higher in a subline of HT-29 cells established from liver metastases in a nude mouse than it was in the parental cells. The relative intensity of wheat germ agglutinin binding to these four sialoglycoprotein components differs depending upon their growth phase in vitro. These glycoproteins were also detectable by the binding of peanut agglutinin, provided the glycoproteins were previously treated in the gels with mild acid to remove the sialic acid from their carbohydrate chains, suggesting that mucin-type carbohydrate chains are present on these glycoproteins. The same set of glycoproteins can be detected by metabolic labeling of the cells with [3H]glucosamine in tissue culture. Very similar glycoprotein profiles are revealed by metabolic labeling of fresh colon carcinoma tissues with [3H]glucosamine in vitro.
AuthorsT Irimura, D A Carlson, D M Ota
JournalJournal of cellular biochemistry (J Cell Biochem) Vol. 37 Issue 1 Pg. 1-9 (May 1988) ISSN: 0730-2312 [Print] United States
PMID3392107 (Publication Type: Journal Article, Research Support, U.S. Gov't, P.H.S.)
Chemical References
  • Lectins
  • Sialoglycoproteins
Topics
  • Adenocarcinoma (metabolism, pathology)
  • Animals
  • Colonic Neoplasms (metabolism, pathology)
  • Electrophoresis, Polyacrylamide Gel
  • Humans
  • Lectins
  • Liver Neoplasms (secondary)
  • Mice
  • Mice, Nude
  • Molecular Weight
  • Sialoglycoproteins (analysis)
  • Tumor Cells, Cultured (analysis, pathology)

Join CureHunter, for free Research Interface BASIC access!

Take advantage of free CureHunter research engine access to explore the best drug and treatment options for any disease. Find out why thousands of doctors, pharma researchers and patient activists around the world use CureHunter every day.
Realize the full power of the drug-disease research graph!


Choose Username:
Email:
Password:
Verify Password:
Enter Code Shown: