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| CYTOTOXIC T-CELLS FROM OVARIAN MALIGNANT-TUMORS CAN RECOGNIZE POLYMORPHIC EPITHELIAL MUCIN CORE PEPTIDES |
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| Author(s): IOANNIDES CG, FISK B, JEROME KR, IRIMURA T, WHARTON JT, FINN OJ |
| Source: JOURNAL OF IMMUNOLOGY Volume: 151 Issue: 7 Pages: 3693-3703 Published: OCT 1 1993 |
| Times Cited: 185 References: 39 |
| Abstract: CTL isolated from tumor infiltrating lymphocytes/tumor associated lymphocytes (TAL) infiltrating ovarian tumors have been demonstrated to mediate lysis of tumor targets after in vitro culture. These effector cells are of particular interest as cellular probes to detect and define human tumor Ag and epitopes that stimulate cellular immunity to human tumors. Polymorphic epithelial mucin (PEM) core peptides are potential candidates as tumor specific Ag because of their preferential expression on epithelial tumors. We report here that ovarian CTL-TAL can recognize mucin (Muc-1) core peptide of PEM. Several ovarian CTL-TAL lines were developed that recognized in a non-MHC restricted fashion an Muc-1+ ovarian tumor, but not an Muc-1- tumor. To define the specificity of these CTL-TAL and exclude cross-reactivity with other potential Ag, cytotoxicity experiments were performed using as targets EBV-transformed cell lines with an expression construct containing the Muc.1 cDNA. These ovarian CTL-TAL lysed mucin core-peptide transfected cells but not targets transfected with an expression construct containing a mucin frame-shift mutant cDNA as control. In addition, targets pulsed with short synthetic peptides composed of amino acids 1-1 4 of the Muc 1 core peptide repeat were also lysed by the same CTL-TAL. This lysis was inhibited by the mAb SM3 that recognize an epitope on the mucin core peptide. These results, which are a demonstration of a specific Ag recognized by ovarian CTL-TAL, may be of interest for specific immunotherapy of ovarian cancer. |
| Document Type: Article |
| Language: English |
| Reprint Address: IOANNIDES, CG (reprint author), UNIV TEXAS, MD ANDERSON CANC CTR, DEPT GYNECOL ONCOL, BOX 67, 1515 HOLCOMBE BLVD, HOUSTON, TX 77030 USA |
Addresses:
1. UNIV TEXAS, MD ANDERSON CANC CTR, DEPT TUMOR BIOL, HOUSTON, TX 77030 USA
2. UNIV PITTSBURGH, SCH MED, DEPT MOLEC GENET & BIOCHEM, PITTSBURGH, PA 15213 USA |
| Publisher: AMER ASSOC IMMUNOLOGISTS, 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 |
| Subject Category: Immunology |
| IDS Number: LZ636 |
| ISSN: 0022-1767 |
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| | | | | | | | | Record from Web of Science® | | | | | | | | | |