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• W2091215785 abstract "BACKGROUND Pancreatic adenocarcinoma cells express gangliosides and sialyl Lewis (sLe) antigens. It is not known whether these carbohydrate antigens can be targeted by immunotherapy. The authors measured the expression of GM2 and sLe antigens on the surface of pancreatic carcinoma cells and the serum levels of total gangliosides, GM2, and antiganglioside antibodies in patients with pancreatic carcinoma. METHODS Cell surface GM2 and sLe antigens were measured by cell suspension enzyme linked immunoadsorbent assay (ELISA) in four pancreatic carcinoma cell lines. Sera from 20 pancreatic carcinoma patients and 20 age- and gender-matched healthy volunteers were analyzed for antiganglioside and anti-sLe immunoglobulin (Ig) M titers by ELISA. Serum levels of total gangliosides and GM2 also were measured. RESULTS All cell lines expressed GM2 and sLe antigens. When compared with age- and gender-matched volunteers, patients had significantly higher serum levels of total gangliosides (25.6 ± 9.0 mg/dL vs. 15.6 ± 2.7 mg/dL; P < 0.001), GM2 (0.278 ± 0.415 mg/dL vs. 0.013 ± 0.018 mg/dL; P = 0.02), ELISA units of anti-GM2 IgM antibody (368 ± 95 vs. 155 ± 25; P = 0.04) and anti-GD1b IgM antibody (351 ± 91 vs. 138 ± 26; P = 0.03), but not anti-sLex IgM (1389 ± 345 vs. 1081 ± 224; P = 0.46) or anti-sLea IgM antibody (1097 ± 253 vs. 1200 ± 315; P = 0.80). Patients with unresectable tumors had higher serum levels of total gangliosides compared with patients with resectable tumors, and a serum level > 25 mg/dL was found to correlate significantly with poor overall survival (P < 0.02). CONCLUSIONS Increased serum levels of total gangliosides and GM2 may reflect shedding or release of gangliosides from the surface of tumor cells. Production of IgM antibody against GM2 and GD1b indicates that these gangliosides are immunogenic antigens that may be potential targets for effective active immunotherapy. Cancer 2000;88:1828–36. © 2000 American Cancer Society." @default.
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• W2091215785 date "2000-04-15" @default.
• W2091215785 modified "2023-10-18" @default.
• W2091215785 title "Gangliosides as targets for immunotherapy for pancreatic adenocarcinoma" @default.
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• W2091215785 doi "https://doi.org/10.1002/(sici)1097-0142(20000415)88:8<1828::aid-cncr11>3.0.co;2-f" @default.
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