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List of genes:

Immune response

Gene: 

CTAG2 (official gene symbol)

Other symbol: 

CTAG2

CT family: 

CT6 

CT identifier: 

CT6.2a

Aliases from NCBI:

ESO2 , LAGE-1 , LAGE-2b , MGC138724 , MGC3803

Humoral 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 phage14747957
Ovarian carcinoma 11/37(30%)ELISA14522938
Gastrict carcinoma 6/12(50%)ELISA15516106

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
A244MLMAQEALAFLORF2autologous tumor cells10399963
A244SLLMWITQC157-165peptide11120859
A315LAAQERRVPRORF2autologous tumor cells9759882
A688ELVRRILSR103-111adenovirus-dendritic cells16187088
B717APRGVRMAVORF2adenovirus-APC14726960
DP475SLLMWITQCFLPVF157-170peptide11259659
DR321QGAMLAAQERRVPRAAEVPRORF2protein15067093
DR424AADHRQLQLSISSCLQQL139-156protein10684854
DR1125CLSRRPWKRSWSAGSCPGMPHLORF2peptide12538712
DR125CLSRRPWKRSWSAGSCPGMPHLORF2peptide12538712
DR1319ILSRDAAPLPRPG108-120autologous tumor cells14738769
DR1520AGATGGRGPRGAGA37-50protein16551878

Induced immune response

There are no published reports that evaluated induced immune responses in patients vaccinated with CTAG2.