2.50
Hdl Handle:
http://hdl.handle.net/10541/72687
Title:
CD8 T-cell recognition of human 5T4 oncofetal antigen.
Authors:
Smyth, Lucy J C; Elkord, Eyad; Taher, Taher; Jiang, Hui-Rong; Burt, Deborah J; Clayton, Alison J; Van Veelen, Peter A; De Ru, Arnoud; Ossendorp, Ferry; Melief, Cornelis J M; Drijfhout, Jan W; Dermime, Said; Hawkins, Robert E; Stern, Peter L
Abstract:
The 5T4 oncofetal antigen is expressed by a wide variety of human carcinomas, including colorectal, ovarian and gastric carcinomas. The restricted expression of 5T4 on tumor tissues as well as its implication in tumor progression and bad prognosis makes 5T4 a promising new candidate for immunotherapy. An MVA vaccine encoding 5T4 antigen has been successfully evaluated in preclinical studies in a murine tumor model. Here, we report the generation of human CD8 T cells specific for the 5T4 antigen by stimulation with autologous monocyte derived DC infected with a replication defective adenovirus encoding the 5T4 cDNA (Ad5T4). Analysis of several donors confirms a repertoire of such CD8 responses. In a parallel approach, incorporating the results of proteasome-mediated digestion of 5T4 derived 35-mer peptides and the potential high affinity epitopes predicted by a computer-based algorithm, we identified 8 putative HLA-A*0201-presented CD8 MHC class I epitopes of 5T4 antigen. Two of these generated specific CD8 T cells after restimulation with peptide loaded autologous DC and assay by cytotoxicity and IFN gamma ELISPOT. Moreover these particular peptide generated T cells recognized naturally 5T4 positive tumor cells only if they expressed HLA-A*0201 as judged by IFN gamma ELISPOT or ELISA. Also, HLA-A*0201 CD8 T cells recognized these peptides in a DC-Ad5T4 polyclonal response. In conclusion, there is a repertoire of CD8 T cell recognition of 5T4 in normal human donors and some candidate HLA-A*0201 epitopes have been identified.
Affiliation:
Immunology Group, Paterson Institute for Cancer Research, Christie Hospital NHS Trust, Manchester, United Kingdom.
Citation:
CD8 T-cell recognition of human 5T4 oncofetal antigen. 2006, 119 (7):1638-47 Int. J. Cancer
Journal:
International Journal of Cancer
Issue Date:
1-Oct-2006
URI:
http://hdl.handle.net/10541/72687
DOI:
10.1002/ijc.22018
PubMed ID:
16646078
Type:
Article
Language:
en
ISSN:
0020-7136
Appears in Collections:
All Paterson Institute for Cancer Research

Full metadata record

DC FieldValue Language
dc.contributor.authorSmyth, Lucy J C-
dc.contributor.authorElkord, Eyad-
dc.contributor.authorTaher, Taher-
dc.contributor.authorJiang, Hui-Rong-
dc.contributor.authorBurt, Deborah J-
dc.contributor.authorClayton, Alison J-
dc.contributor.authorVan Veelen, Peter A-
dc.contributor.authorDe Ru, Arnoud-
dc.contributor.authorOssendorp, Ferry-
dc.contributor.authorMelief, Cornelis J M-
dc.contributor.authorDrijfhout, Jan W-
dc.contributor.authorDermime, Said-
dc.contributor.authorHawkins, Robert E-
dc.contributor.authorStern, Peter L-
dc.date.accessioned2009-07-07T10:38:40Z-
dc.date.available2009-07-07T10:38:40Z-
dc.date.issued2006-10-01-
dc.identifier.citationCD8 T-cell recognition of human 5T4 oncofetal antigen. 2006, 119 (7):1638-47 Int. J. Canceren
dc.identifier.issn0020-7136-
dc.identifier.pmid16646078-
dc.identifier.doi10.1002/ijc.22018-
dc.identifier.urihttp://hdl.handle.net/10541/72687-
dc.description.abstractThe 5T4 oncofetal antigen is expressed by a wide variety of human carcinomas, including colorectal, ovarian and gastric carcinomas. The restricted expression of 5T4 on tumor tissues as well as its implication in tumor progression and bad prognosis makes 5T4 a promising new candidate for immunotherapy. An MVA vaccine encoding 5T4 antigen has been successfully evaluated in preclinical studies in a murine tumor model. Here, we report the generation of human CD8 T cells specific for the 5T4 antigen by stimulation with autologous monocyte derived DC infected with a replication defective adenovirus encoding the 5T4 cDNA (Ad5T4). Analysis of several donors confirms a repertoire of such CD8 responses. In a parallel approach, incorporating the results of proteasome-mediated digestion of 5T4 derived 35-mer peptides and the potential high affinity epitopes predicted by a computer-based algorithm, we identified 8 putative HLA-A*0201-presented CD8 MHC class I epitopes of 5T4 antigen. Two of these generated specific CD8 T cells after restimulation with peptide loaded autologous DC and assay by cytotoxicity and IFN gamma ELISPOT. Moreover these particular peptide generated T cells recognized naturally 5T4 positive tumor cells only if they expressed HLA-A*0201 as judged by IFN gamma ELISPOT or ELISA. Also, HLA-A*0201 CD8 T cells recognized these peptides in a DC-Ad5T4 polyclonal response. In conclusion, there is a repertoire of CD8 T cell recognition of 5T4 in normal human donors and some candidate HLA-A*0201 epitopes have been identified.en
dc.language.isoenen
dc.subject.meshAdenoviridae-
dc.subject.meshAmino Acid Sequence-
dc.subject.meshAntigens, Neoplasm-
dc.subject.meshCD8-Positive T-Lymphocytes-
dc.subject.meshCell Line-
dc.subject.meshEpitopes-
dc.subject.meshHLA-A Antigens-
dc.subject.meshHumans-
dc.subject.meshInterferon-gamma-
dc.subject.meshMolecular Sequence Data-
dc.subject.meshPeptide Fragments-
dc.subject.meshProteasome Endopeptidase Complex-
dc.subject.meshProtein Binding-
dc.titleCD8 T-cell recognition of human 5T4 oncofetal antigen.en
dc.typeArticleen
dc.contributor.departmentImmunology Group, Paterson Institute for Cancer Research, Christie Hospital NHS Trust, Manchester, United Kingdom.en
dc.identifier.journalInternational Journal of Canceren

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