NY-ESO-1 Is a Ubiquitous Immunotherapeutic Target Antigen for Patients With myxoid/round Cell Liposarcoma

Cancer. 2012 Sep 15;118(18):4564-70. doi: 10.1002/cncr.27446. Epub 2012 Feb 22.

Abstract

Background: Myxoid/round cell liposarcoma (MRCL) is the second most common liposarcoma subtype, accounting for >33% of liposarcomas and approximately 10% of all soft tissue sarcomas. Although MRCL is a chemosensitive subtype, patients with metastatic disease have a poor outcome. NY-ESO-1 is a cancer-testis antigen (also known as cancer germ cell antigen) that has been successfully targeted in vaccine trials and in adoptive T-cell therapy trials for the treatment of several solid tumors.

Methods: The authors investigated the feasibility of targeting NY-ESO-1 in patients with MRCL by evaluating the prevalence of NY-ESO-1 expression in tumors using immunohistochemistry and quantitative reverse transcriptase-polymerase chain reaction analysis. NY-ESO-1-specific tumor recognition by NY-ESO-1-specific T-cells also was analyzed using a chromium release assay.

Results: A search of the University of Washington Sarcoma Tissue Bank identified paraffin-embedded tumor samples from 25 patients with MRCL. NY-ESO-1 expression was observed in every MRCL tumor assessed (100%); in 18 tumors (72%), staining was homogenous. In all but 2 tumors, staining was sufficiently robust (2+) that such patients would be eligible for clinical trials of NY-ESO-1-directed therapy. By using NY-ESO-1 specific, CD8-positive T-cells, the in vitro sensitivity of myxoid liposarcoma cell lines to antigen-specific lysis was demonstrated.

Conclusions: The current results establish NY-ESO-1 as an important target antigen for the treatment of patients with MRCL.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antigens, Neoplasm / analysis
  • Antigens, Neoplasm / immunology*
  • CD8-Positive T-Lymphocytes / immunology*
  • Cell Line, Tumor
  • Humans
  • Immunohistochemistry
  • Immunotherapy
  • Liposarcoma, Myxoid / immunology*
  • Liposarcoma, Myxoid / therapy*
  • Membrane Proteins / analysis
  • Membrane Proteins / immunology*
  • Reverse Transcriptase Polymerase Chain Reaction

Substances

  • Antigens, Neoplasm
  • CTAG1B protein, human
  • Membrane Proteins