Association between the cytotoxic T-lymphocyte antigen 4 -318C/T polymorphism and malignant tumor risk

Li,Taiming; Wang,Chengdi; Ren,Zhenju; Ji,Yi; Xu,Chang; Xiao,Bing; Liu,Min

doi:10.3892/br.2016.683

Association between the cytotoxic T-lymphocyte antigen 4 -318C/T polymorphism and malignant tumor risk

Authors:
- Taiming Li
- Chengdi Wang
- Zhenju Ren
- Yi Ji
- Chang Xu
- Bing Xiao
- Min Liu
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Affiliations: Department of Pediatric Surgery, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China, Department of Respiratory Medicine, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China, Department of Urinary Surgery, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
Published online on: May 19, 2016 https://doi.org/10.3892/br.2016.683
Pages: 93-100

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Abstract

The cytotoxic T-lymphocyte antigen 4 (CTLA-4) polymorphic loci -318 cytosine/thymine (-318C/T) has been previously implicated in malignant tumor susceptibility. However, there were no precise conclusions about the correlation, the results from published studies were inconclusive. The aim of the current meta‑analysis was to investigate the associations between CTLA-4 ‑318C/T polymorphisms and risk of malignant tumors in Asian population. We conducted a search in PubMed, Embase, the Chinese Journals Full‑Text Database, Chinese Biomedical Database, and the Wanfang database. All studies were published up to September 30, 2015. Two reviewers analysed the data independently. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to assess the association. In total, 20 case‑controlled studies with 3,539 cases and 4,690 controls were included in the final meta‑analysis. The overall estimation demonstrated a significant association between CTLA‑4 ‑318C/T polymorphism and malignant tumor risk in the Asian populations (TT+TC vs. CC: OR, 1.28; 95% CI, 1.07‑1.53. TT vs. TC+CC: OR, 1.43; 95% CI, 1.03‑1.99; TT vs. CC: OR, 1.51; 95% CI, 1.09‑2.10. TC vs. CC: OR, 1.26; 95% CI, 1.06‑1.50. T vs. C: OR, 1.25, 95% CI, 1.05‑1.47). In the subgroup analysis by countries, we found that the dominant model (TT+TC vs. CC) revealed an increased risk of developing malignant tumors in the Chinese study population (OR, 1.41; 95% CI, 1.13‑1.76), but no association was demonstrated in the other countries. The current meta‑analysis suggests that CTLA‑4 ‑318C/T polymorphism is significantly associated with the risk of malignance tumors in Asian populations, especially in those from China. Further studies for additional Asian countries are required to further evaluate the association.

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