Immune response
Gene:
CTAG2 (official gene symbol)Other symbol:
CTAG2CT family:
CT6CT identifier:
CT6.2aAliases from NCBI:
ESO2 , LAGE-1 , LAGE-2b , MGC138724 , MGC3803Humoral immune response
Antibody recognition of LAGE1 was demonstrated by SEREX (Chen et al., 1998).
Spontaneous humoral immune responses against CTAG2 have been detected in cancer patients.
Tumor type | Tumor stage | Frequency | Antibody detection methodology | PMID |
---|---|---|---|---|
Prostate carcinoma | 3/20(15%) | Detection of protein in M13 phage | 14747957 | |
Ovarian carcinoma | 11/37(30%) | ELISA | 14522938 | |
Gastrict carcinoma | 6/12(50%) | ELISA | 15516106 |
Cellular immune response
Naturally occurring cellular immune responses against CTAG2 are low and rarely detected in cancer patients.
Nevertheless, Wang et al., 2004 have generated and characterized tumor-specific CD4-T cell clones derived from the TILs of a melanoma patient, which recognized LAGE1 peptide as a natural ligand. Tumor-associated CD8(+) T cell epitopes were generated from both primary and nonprimary ORF products of LAGE-1 and NY-ESO-1 genes, in the majority of melanoma tumors (Rimoldi et al., 2000 PMID: 11120859). It is noteworthy of mention the presence of Th cells specific for the alternatively translated tumor Ag CAMEL in cancer patients (Mandic et al., 2003; Slager et al., 2004). In addition, the following CTAG2 epitopes recognized by T cells have been identified after stimulation of lymphocytes in vitro (Cancer Immunity Peptide Database).
HLA | HLA Frequency (%) | Peptide | Position | Lymphocyte Stimulation Method |
PMID |
---|---|---|---|---|---|
A2 | 44 | MLMAQEALAFL | ORF2 | autologous tumor cells | 10399963 |
A2 | 44 | SLLMWITQC | 157-165 | peptide | 11120859 |
A31 | 5 | LAAQERRVPR | ORF2 | autologous tumor cells | 9759882 |
A68 | 8 | ELVRRILSR | 103-111 | adenovirus-dendritic cells | 16187088 |
B7 | 17 | APRGVRMAV | ORF2 | adenovirus-APC | 14726960 |
DP4 | 75 | SLLMWITQCFLPVF | 157-170 | peptide | 11259659 |
DR3 | 21 | QGAMLAAQERRVPRAAEVPR | ORF2 | protein | 15067093 |
DR4 | 24 | AADHRQLQLSISSCLQQL | 139-156 | protein | 10684854 |
DR11 | 25 | CLSRRPWKRSWSAGSCPGMPHL | ORF2 | peptide | 12538712 |
DR12 | 5 | CLSRRPWKRSWSAGSCPGMPHL | ORF2 | peptide | 12538712 |
DR13 | 19 | ILSRDAAPLPRPG | 108-120 | autologous tumor cells | 14738769 |
DR15 | 20 | AGATGGRGPRGAGA | 37-50 | protein | 16551878 |
Induced immune response
There are no published reports that evaluated induced immune responses in patients vaccinated with CTAG2.