Serum Lipid Associated Sialic Acid in Different Human Malignances: Preliminary Results
The documentation of alteration in the metabolism of tumor cell surface glycoproteins and sialoglycolipids1,2 has encouraged the study of these components as possible tumor marker in blood. Recent studies show that mean values for total bound sialic acid3,4,5,6 or protein bound sialic acid7,8 were higher in cancer patients than in normal subjects. Sialic acid levels correlated with stage of disease9,7, tumor burden5,10 degree of metastasis and recurrence of disease11. In some cases protein-bound sialic acid showed only limited correlation with the clinical disease status of the patient8. A serious limitation of this procedure was the finding that sialic acid levels were also elevated in other inflammatory or chronic diseases 9,5,12 resulting in false positive findings.
KeywordsBreast Cancer Gastric Cancer Sialic Acid Neuraminic Acid Total Sialic Acid
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