Abstract
Cytotoxic T lymphocyte-associated antigen-4 (CTLA-4) was widely accepted as a pivotal molecule in downregulating T-cell mediated immune responses. In this study we investigated the polymorphisms which would impact the CTLA-4 gene expression and function to assess the association with the risk of gastric cancer. 205 gastric cancer patients and 262 healthy controls were included in the case-control study. PCR and restriction fragment length polymorphism (RFLP) methods were performed to identify the +49A/G and promoter −1661A/G polymorphisms. The promoter −1772T/C polymorphism was detected by PCR amplification refractory mutation system (ARMS) technique. A significant difference was observed between case and control groups. The frequency of +49A/G polymorphism AG and −1661A/G polymorphism GG genotype were significantly higher in patients than in controls (OR = 2.15, OR = 1.88, respectively). No significant difference was found in the allelic frequency of −1772T/C polymorphism between cases and controls (P = 0.478). By the haplotype analysis, logistic regression showed the frequency of haplotype A (GAT) and D (AGT) in the case group revealed significant difference compared with in control group(OR = 2.00, P < 0.001; OR = 1.62, P = 0.043, respectively). Our findings implied the genetic variations within CTLA-4 gene would be a critical risk factor to the susceptibility of gastric cancer.
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Abbreviations
- CTLA-4:
-
Cytotoxic T lymphocyte-associated antigen-4
- ARMS:
-
Amplification refractory mutation system
- RFLP:
-
Restriction fragment length polymorphism
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Ruiping Hou and Bangwei Cao contributed equally to this work.
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Hou, R., Cao, B., Chen, Z. et al. Association of Cytotoxic T Lymphocyte-associated antigen-4 gene haplotype with the susceptibility to gastric cancer. Mol Biol Rep 37, 515–520 (2010). https://doi.org/10.1007/s11033-009-9705-1
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DOI: https://doi.org/10.1007/s11033-009-9705-1