Association between IL-21 polymorphism and systemic lupus erythematosus: a meta-analysis.
Several case-control studies have been conducted to investigate the association between Interleukin-21 (IL-21) polymorphisms and systemic lupus erythematosus (SLE) susceptibility, and most of the studies focused on IL-21 rs907715 and rs2221903 polymorphisms. Given the inconsistent results from these studies, the present meta-analysis aimed to obtain a more precise estimate of the association between IL-21 rs907715 and rs2221903 polymorphisms and SLE. Studies regarding these specific polymorphisms and SLE were retrieved from PubMed, Embase, Web of Science, CNKI, and CBM. Data were extracted and meta-analysis was performed using the STATA 12.0 software. For the IL-21 rs907715 polymorphism, seven sets of comparisons involving 7977 SLE cases and 8097 healthy controls were considered. Results showed that there were significant differences in the IL-21 rs907715 genotype distribution between SLE patients and healthy controls in the comparisons of all genetic models. Upon stratified analysis by ethnicity, a similar result was found in the Caucasian and African-American population. For the IL-21 rs2221903 polymorphism, seven sets of comparisons involving 7990 SLE cases and 8098 healthy controls were considered. Results showed that there were significant differences in the IL-21 rs2221903 genotype distribution between SLE patients and healthy controls in the comparisons of GG versus AA and GG versus GA+AA. Upon stratified analysis by ethnicity, a similar result was found in the Caucasian population. This meta-analysis suggests that the both IL-21 rs907715 and rs2221903 polymorphisms may be associated with SLE susceptibility. As current evidence remains limited, further studies are needed to warrant the association between IL-21 rs907715 and rs2221903 polymorphisms and SLE susceptibility.
Department of Hubei Key Laboratory of Kidney Disease Pathogenesis and Intervention, Huangshi Central Hospital.
J H
JH
Qi
Department of Burns, People's Hospital of Lanling County, Lanling, China.
J
J
Qi
Department of Hubei Key Laboratory of Kidney Disease Pathogenesis and Intervention, Huangshi Central Hospital.
L N
LN
Xiang
Department of Dermatology, Huangshi Central Hospital, Affiliated Hospital of Hubei Polytechnic University, Huangshi, China niegang2014@126.com.
G
G
Nie
D000483:Alleles; D016022:Case-Control Studies; D005787:Gene Frequency; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D007378:Interleukins / Q000235:genetics*; D008180:Lupus Erythematosus, Systemic / Q000235:genetics*; D016017:Odds Ratio; D020641:Polymorphism, Single Nucleotide; D017594:Publication Bias; D000098546:Interleukin-21
D007378:Interleukins; D000098546:Interleukin-21