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Anti-T antibodies and peanut-agglutinin-binding glycoproteins in sera of patients with gastric cancer.

Authors
Hwang, IR; Nahm, DH; Cho, SN; Longenecker, BM; Rao Koganty, R; Park, IS
Citation
Journal of cancer research and clinical oncology, 125(10):582-587, 1999
Journal Title
Journal of cancer research and clinical oncology
ISSN
0171-52161432-1335
Abstract
Agglutinating antibodies to neuraminidase-treated red blood cells (anti-T agglutinins) are known to be reduced in patients with gastric cancer. The antigenic determinant of anti-T agglutinin is known to have a disaccharide structure [Gal(beta1-3)GalNAc], the same specificity as peanut agglutinin (PNA). We examined sera of 27 patients with gastric cancer and 30 controls for anti-T agglutinins, anti-T antibodies and PNA-binding glycoproteins. Anti-T agglutinins were titrated by a microtiter hemagglutination method. Levels of anti-T antibodies were determined by enzyme immunoassay using synthetic glycoconjugate [Gal(beta1-3)GalNAc O-alpha-linked to human serum albumin] as an antigen. Levels of PNA-binding glycoproteins in sera were measured by sandwich enzyme-linked lectin assay using wheat germ agglutinin and peroxidase-conjugated PNA. Titers of anti-T agglutinins were significantly lower in patients with gastric cancer than in controls (P = 0.041). Levels of anti-T antibodies were not significantly different in patients with gastric cancer and controls; however, decreased levels of anti-T antibodies were more frequent in patients with gastric cancer than in controls (P = 0. 001). Levels of PNA-binding glycoproteins were significantly higher in sera of patients with gastric cancer than in controls (P = 0.001). The levels of anti-T antibodies inversely correlated with the levels of PNA-binding glycoproteins in sera of patients with gastric cancer (r = -0.44, P = 0.021). These results suggest that the decrease in anti-T antibodies in sera of patients with gastric cancer might be due to immune complex formation between circulating PNA-binding glycoproteins and anti-T antibodies.
MeSH terms
AdultAgedAgglutinins/metabolismAntibodies, Neoplasm/blood*Case-Control StudiesEnzyme-Linked Immunosorbent AssayFemaleGlycoproteins/blood*HumansMaleMiddle AgedPeanut Agglutinin/metabolism*Plant LectinsProtein BindingStomach Neoplasms/blood*Stomach Neoplasms/immunologyT-Lymphocytes/immunology*Triticum
PMID
10473872
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Allergy
AJOU Authors
남, 동호
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