Dataset Information

Interleukin-17F 7488T/C polymorphism is associated with protection against asthma: a meta-analysis.

ABSTRACT: The association between interleukin-17F (IL-17F) 7488T/C polymorphism and asthma risk is conflicting. This study conducted a meta-analysis by pooling all available data to make a more precise estimation of the association. Electronic databases PubMed, EMBASE, and China National Knowledge Infrastructure were searched to identify all eligible studies assessing the association between IL-17F 7488T/C polymorphism and asthma risk. The pooled odds ratios (ORs) with corresponding 95% confidence intervals (95% CIs) were calculated. A total of five case-control studies with 1445 cases and 1608 controls were included. Overall, the pooled ORs showed that the IL-17F 7488T/C polymorphism was inversely associated with risk of asthma (OR=0.29, 95% CI=[0.12, 0.70]) using recessive genetic model. Furthermore, this association was found to be exclusive to Asians (OR=0.31, 95% CI= [0.12, 0.84]). Sensitivity analysis by omission of single study in turn showed similar results. In conclusion, the present meta-analysis suggested that homozygote of IL-17F 7488T/C variant could protect against asthma in Asians. However, more studies conducted in different ethnic groups with large sample size are warranted to validate the precise association.

SUBMITTER: Wang T

PROVIDER: S-EPMC4729989 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature

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Interleukin-17F 7488T/C polymorphism is associated with protection against asthma: a meta-analysis.

Wang Ting T Zhu Min M Liang Bin-Miao BM Liang Zong-An ZA Ji Yu-Lin YL

International journal of clinical and experimental medicine 20151215 12

The association between interleukin-17F (IL-17F) 7488T/C polymorphism and asthma risk is conflicting. This study conducted a meta-analysis by pooling all available data to make a more precise estimation of the association. Electronic databases PubMed, EMBASE, and China National Knowledge Infrastructure were searched to identify all eligible studies assessing the association between IL-17F 7488T/C polymorphism and asthma risk. The pooled odds ratios (ORs) with corresponding 95% confidence interva ...[more]

PMID: 26885203

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Project description:BackgroundAsthma is a complex polygenic disease in which gene-environment interactions are important. A number of studies have investigated the polymorphism of IL-1β -511C/T and IL-1RA genes in relation to asthma susceptibility in different populations. However, the results of individual studies have been inconsistent. Accordingly, we conducted a comprehensive meta-analysis to investigate the association between the IL-1β -511C/T and IL-1RA polymorphism and asthma risk.MethodsData were collected from the following electronic databases: Pub Med, China National Knowledge Infrastructure (CNKI), Chinese Biomedical Literature Database (CBM), ISI Web of Knowledge, and Google Scholar Search databases with the last report up to July 2013. Finally, 15 studies were included in our meta-analysis. We summarized the data on the association between IL-1β -511C/T and IL-1RA polymorphism and risk of asthma in the overall population and performed subgroup analyses by ethnicity, mean of age, and source of controls. Odds ratio (OR) and 95% confidence interval (CI) were used to evaluate the associations between IL-1β -511C/T and IL-1RA polymorphism and asthma risk. Statistical analysis was performed with Review Manager 5.1.ResultsA total of 15 case-control studies were included in the meta-analysis of IL-1β -511C/T (1,385 cases and 1,964 controls) and IL-1RA (2,800 cases and 6,359 controls) genotypes. No association was found between IL-1β -511C/T polymorphism and asthma risk (dominant model: OR = 1.11, 95% CI: 0.99-1.25, P = 0.07, P Heterogeneity = 0.06; recessive model: OR = 1.04, 95% CI: 0.91-1.20, P = 0.55, P Heterogeneity = 0.11). Subgroup analysis based on ethnicity (Asian and Caucasian), source of controls (population-based controls and hospital-based controls), and mean of age (adulthood and childhood) did not present any significant association. The overall results showed that the IL-1RA polymorphism was related to an increased risk of asthma (homozygote model: OR = 1.32, 95% CI: 1.12-1.56, P = 0.0009, P Heterogeneity = 0.87; recessive model: OR = 1.39, 95% CI: 1.18-1.63, P = 0.0001, P Heterogeneity = 0.82). Similar results were found in the subgroup analyses by ethnicity, mean of age, and source of controls. Sensitivity analysis did not perturb the results.ConclusionsThis meta-analysis provided strong evidence that the IL-1RA polymorphism was a risk factor of asthma, especially in Caucasian populations. However, no association was found for IL-1β -511C/T genotype carriers. Larger scale studies are needed for confirmation.

Project description:Abstract Background Previous studies reported that patients with asthma showed higher levels of interleukin (IL)‐33 in peripheral blood, compared to healthy control (HCs). However, we also noticed that there were no significant differences of IL‐33 levels between controls and asthma patients in a recent study. We aim to conduct this meta‐analysis and evaluate the feasibility of IL‐33 in peripheral blood that may act as a promising biomarker in asthma. Methods Articles published before December 2022 were searched in these databases (PubMed, Web of Science, EMBASE, and Google Scholar). We used STATA 12.0 software to compute the results. Results The study showed that asthmatics showed higher IL‐33 level in serum and plasma, compared to HCs (serum: standard mean difference [SMD] 2.06, 95% confidence interval [CI] 1.12−3.00, I2 = 98.4%, p < .001; plasma: SMD 3.67, 95% CI 2.32−5.03, I2 = 86.0%, p < .001). Subgroup analysis indicated that asthma adults showed higher IL‐33 level in serum, compared to HCs, whereas no significant difference in IL‐33 level in serum was showed between asthma children and HCs (adults: SMD 2.17, 95% CI 1.09−3.25; children: SMD 1.81, 95% CI −0.11 to 3.74). The study indicated that moderate and severe asthmatics showed higher IL‐33 level in serum, compared to mild asthmatics (SMD 0.78, 95% CI 0.41−1.16, I2 = 66.2%, p = .011). Conclusions In conclusion, the main findings of present meta‐analysis suggested that there was a significant correlation between IL‐33 levels and the severity of asthma. Therefore, IL‐33 levels of either serum or plasma may be regarded as a useful biomarker of asthma or the degree of disease. In conclusion, the main findings of present meta‐analysis suggested that there was significant correlation between interleukin (IL)‐33 levels and the severity of asthma. Therefore, the IL‐33 levels of either serum or plasma may be regarded as a useful biomarker of asthma or the degree of disease. However, we can not ignore the influences of ethnic and age factors on the IL‐33 levels. It is encouraged that data from multi‐center, well‐designed and large sample size studies should be conducted for validating the clinical value of IL‐33 on asthma.

Project description:BackgroundPrevious studies evaluated the association of IL-4 C33T polymorphism and risk of bronchial asthma but failed to establish a consistent conclusive association. In the present meta-analysis, we intend to define a more reliable estimate of the association in the presence of filling published literature.MethodsAn exhaustive search in Web of Science, Scopus, and PubMed databases was performed to identify all relevant publications before September 2020, and 24 publications (28 studies) with 6587 cases and 8408 controls were included in final analysis. The association between polymorphism and risk of asthma were measured by Odd ratios (ORs) and 95% confidence intervals (CIs). Moreover, Cochran's Q and the I2 statistics were used to evaluate the degree of heterogeneity between studies.ResultsIn the overall study populations, a significant positive association was detected under all genotype models and announced the IL-4 C33T polymorphism as a potential risk factor in the pathogenesis of asthma. In the subgroup analysis by age, a significant association between IL-4 C33T polymorphism and risk of asthma in different age groups was identified in allelic model, which highlighted the predisposing role of the T allele for the asthma risk in all three age groups. Furthermore, the results of subgroup analysis by continent were heterogenous. Accordingly, IL-4 C33T polymorphism was a risk factor in Europeans (all models except heterozygote comparison), Americans (all models except recessive and homozygote comparison) and Asians (just recessive and allelic model). Finally, the ethnicity-specific analysis disclosed a significant association between IL-4 C33T polymorphism and asthma risk in Caucasians (all genotype models except heterozygote comparison), while this association was not significant in African-Americans.ConclusionsThis study suggests that IL-4 C33T polymorphism potentially acts as a risk factor for asthma in different ethnicities and age groups.

Dataset Information

Interleukin-17F 7488T/C polymorphism is associated with protection against asthma: a meta-analysis.

Publications

Interleukin-17F 7488T/C polymorphism is associated with protection against asthma: a meta-analysis.

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