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Molecular Biology Reports

, Volume 39, Issue 9, pp 8701–8708 | Cite as

Polymorphisms in the cytotoxic T-lymphocyte antigen 4 gene and acute rejection risk in transplant recipients

  • Cheng-lin Zhu
  • Qiang Huang
  • Chen-hai Liu
  • Fang Xie
Article

Abstract

Cytotoxic T-lymphocyte antigen 4 (CTLA-4) gene polymorphisms have been reported to influence the risk for acute rejection (AR) in transplant recipients. However, the results still remain controversial and ambiguous. 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 AR in transplant recipients. Electronic searches for all publications were conducted on associations between this variant and acute rejection in Medline and Embase databases through November 2011. Crude odds ratios (ORs) with 95 % confidence intervals (CIs) were calculated to estimate the strength of the association. Three polymorphisms (+49 adenine/guanine [+49A/G], −318 cytosine/thymine [−318C/T], and the +6230G/A polymorphism [CT60]) in 18 case–control studies from ten articles were analyzed. This meta-analysis included 2,081 cases of transplant recipients in which 813 cases developed AR and 1,268 cases did not develop AR. The results indicated that there was no statistically significant association between the risk of AR and the +49A/G polymorphism or the −318C/T polymorphism (+49A/G: OR = 0.876, 95 % CI = 0.650–1.180 for GG vs. AA; OR = 1.121, 95 % CI = 0.911–1.379 for AG + GG vs. AA; −318C/T: OR = 0.397, 95 % CI = 0.138–1.143 for TT vs. CC; OR = 0.987, 95 %CI = 0.553–1.760 for CT + TT vs. CC). However, individuals who carried CT60 A allele might have a decreased risk of AR (AA vs. GG OR = 0.535, 95 % CI = 0.340–0.841, A vs. G OR = 0.759, 95 % CI = 0.612–0.914) in liver transplant recipients among Europeans, but because only two studies were included, so the result should be caution. In further stratified analyses for the +49A/G and the −318C/T polymorphisms, no obvious significant associations were found in subgroups of renal transplant recipients and Europeans, a reduced incidence of acute rejection was observed in liver transplant recipients that are homogenous for +49G (OR = 0.638, 95 % CI = 0.427–0.954 for GG vs. AA/AG), while this has not been observed in renal transplant recipients. Overall this meta-analysis suggests that +49A/G and the −318C/T polymorphisms in CTLA-4 may be not associated with the risk of rejection after organ transplantation, but CTLA +49A/G and +6230G/A polymorphisms may be associated with acute rejection after liver transplantation, not after renal transplantation. In future, more studies should be included to evaluate the association between +6230G/A polymorphism and AR risk.

Keywords

Cytotoxic T-lymphocyte antigen 4 Polymorphism Acute rejection Meta-analysis 

Notes

Acknowledgments

This work was partly supported by the Grants from scientific and technological project of Anhui province (Code: 08010302189). We thank all the people who give the help for this study.

Conflict of interest

We declare that we have no conflict of interest.

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Cheng-lin Zhu
    • 1
  • Qiang Huang
    • 1
  • Chen-hai Liu
    • 1
  • Fang Xie
    • 1
  1. 1.Department of General SurgeryAnhui Provincial Hospital Affiliated with Anhui Medical UniversityAnhui ProvinceChina

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