The first 3 authors contributed equally to this article.
Polymorphisms in the cytotoxic T-lymphocyte antigen 4 gene and cancer risk†
Article first published online: 8 MAR 2011
Copyright © 2011 American Cancer Society
Volume 117, Issue 18, pages 4312–4324, 15 September 2011
How to Cite
Zhang, Y., Zhang, J., Deng, Y., Tian, C., Li, X., Huang, J. and Fan, H. (2011), Polymorphisms in the cytotoxic T-lymphocyte antigen 4 gene and cancer risk. Cancer, 117: 4312–4324. doi: 10.1002/cncr.25979
- Issue published online: 2 SEP 2011
- Article first published online: 8 MAR 2011
- Manuscript Accepted: 8 DEC 2010
- Manuscript Revised: 22 NOV 2010
- Manuscript Received: 11 OCT 2010
- cytotoxic T-lymphocyte antigen 4;
Polymorphisms in the cytotoxic T-lymphocyte antigen 4 (CTLA-4) gene have been implicated in susceptibility to cancer, but the many published studies have reported inconclusive results. The objective of the current study was to conduct a meta-analysis investigating the association between polymorphisms in the CTLA-4 gene and the risk of cancer.
The PubMed and EMBASE databases were searched for all articles published up to September 19, 2010 that addressed cancer and polymorphisms, variants, or mutations of CTLA-4. A statistical analysis was performed using proprietary statistical software.
Three polymorphisms (+49 adenine/guanine [+49A/G], −318 cytosine/thymine [−318C/T], and the +6230G/A polymorphism [CT60]) in 48 case-control studies from 27 articles were analyzed. The results indicated that individuals who carried the +49 G allele (AG + GG) had a 16% decreased risk of cancer compared with homozygotes (+49AA; odds ratio [OR], 0.84; 95% confidence interval [CI], 0.74-0.95). However, there was no significant association between the risk of cancer and the −318C/T polymorphism or the CT60 polymorphism (−318C/T: OR, 1.23; 95% CI, 0.99-1.54 for TT + TC vs CC; CT60: OR, 1.02; 95% CI, 0.80-1.29 for AA + AG vs GG). In further stratified analyses for the +49A/G and −318C/T polymorphisms, the decreased risk of cancer remained in subgroups of Europeans, patients with breast cancer, and patients with lung cancer for the +49A/G polymorphism; whereas an increased risk of cancer was observed among Europeans for the −318C/T polymorphism.
Results from the current meta-analysis suggested that the +49A/G and −318C/T polymorphisms in CTLA-4 are risk factors for cancer. To further evaluate gene-gene and gene-environment interactions between CTLA-4 polymorphisms and the risk of cancer, more studies with larger groups of patients will be required. Cancer 2011;. © 2011 American Cancer Society.