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J. Exp. Med.,
Volume 187, Number 8, April 20, 1998 1349-1354
By




From the * Ludwig Institute for Cancer Research, New York Branch at Memorial Sloan-Kettering
Cancer Center, New York 10021; Evidence is growing for both humoral and cellular immune recognition of human tumor antigens. Antibodies with specificity for antigens initially recognized by cytotoxic T lymphocytes
(CTLs), e.g., MAGE and tyrosinase, have been detected in melanoma patient sera, and CTLs
with specificity for NY-ESO-1, a cancer-testis (CT) antigen initially identified by autologous
antibody, have recently been identified. To establish a screening system for the humoral response to autoimmunogenic tumor antigens, an enzyme-linked immunosorbent assay (ELISA)
was developed using recombinant NY-ESO-1, MAGE-1, MAGE-3, SSX2, Melan-A, and tyrosinase proteins. A survey of sera from 234 cancer patients showed antibodies to NY-ESO-1 in 19 patients, to MAGE-1 in 3, to MAGE-3 in 2, and to SSX2 in 1 patient. No reactivity to
these antigens was found in sera from 70 normal individuals. The frequency of NY-ESO-1 antibody was 9.4% in melanoma patients and 12.5% in ovarian cancer patients. Comparison of
tumor NY-ESO-1 phenotype and NY-ESO-1 antibody response in 62 stage IV melanoma patients showed that all patients with NY-ESO-1+ antibody had NY-ESO-1+ tumors, and no
patients with NY-ESO-1
II. Medizinische Klinik, Hämatologie-Onkologie, Krankenhaus
Nordwest, 60488 Frankfurt, Germany; the § Cornell University Medical College, New York 10021;
Ludwig Institute for Cancer Research, London Branch at University College London School of
Medicine, W1P 8BT London, United Kingdom; and the ¶ Institut für Toxikologie, Johannes
Gutenberg Universität, 55131 Mainz, Germany
tumors had NY-ESO-1 antibody. As the proportion of melanomas expressing NY-ESO-1 is 20-40% and only patients with NY-ESO-1+ tumors have antibody,
this would suggest that a high percentage of patients with NY-ESO-1+ tumors develop an antibody response to NY-ESO-1.
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