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J. Exp. Med.,
Volume 187, Number 2, January 19, 1998 265-270
By
§
From the * II. Medizinische Klinik, Hämatologie-Onkologie, Krankenhaus Nordwest, 60488 Frankfurt, Germany; A growing number of human tumor antigens have been described that can be recognized by
cytotoxic T lymphocytes (CTLs) in a major histocompatibility complex (MHC) class I-restricted
fashion. Serological screening of cDNA expression libraries, SEREX, has recently been shown
to provide another route for defining immunogenic human tumor antigens. The detection of
antibody responses against known CTL-defined tumor antigens, e.g., MAGE-1 and tyrosinase, raised the question whether antibody and CTL responses against a defined tumor antigen can
occur simultaneously in a single patient. In this paper, we report on a melanoma patient with a
high-titer antibody response against the "cancer-testis" antigen NY-ESO-1. Concurrently, a
strong MHC class I-restricted CTL reactivity against the autologous NY-ESO-1-positive tumor cell line was found. A stable CTL line (NW38-IVS-1) was established from this patient that reacted with autologous melanoma cells and with allogeneic human histocompatibility
leukocyte antigen (HLA)-A2
Cornell University Medical College, New York 10021; § Ludwig Institute for
Cancer Research, New York Branch at Memorial Sloan-Kettering Cancer Center, New York 10021;
Department of Immunohaematology and Blood Bank, Leiden University Hospital, 2300 Leiden, The
Netherlands; and ¶ Institut für Toxikologie, Johannes Gutenberg Universität, 55131 Mainz, Germany
, NY-ESO-1-positive, but not NY-ESO-1-negative, melanoma
cells. Screening of NY-ESO-1 transfectants with NW38-IVS-1 revealed NY-ESO-1 as the
relevant CTL target presented by HLA-A2. Computer calculation identified 26 peptides with
HLA-A2-binding motifs encoded by NY-ESO-1. Of these, three peptides were efficiently
recognized by NW38-IVS-1. Thus, we show that antigen-specific humoral and cellular immune responses against human tumor antigens may occur simultaneously. In addition, our
analysis provides a general strategy for identifying the CTL-recognizing peptides of tumor antigens initially defined by autologous antibody.
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