Background Genetic variations in the interferon-gamma （IFN-γ） receptor 1 gene （IFNGR1） may contribute to tuberculosis （TB） risk in different populations.Many studies have investigated the relationship between I...Background Genetic variations in the interferon-gamma （IFN-γ） receptor 1 gene （IFNGR1） may contribute to tuberculosis （TB） risk in different populations.Many studies have investigated the relationship between IFNGR1 56C/T polymorphism and the susceptibility to TB,but have yielded conflicting results.A comprehensive meta-analysis is needed to provide a more accurate estimation of the relationship between them.Methods A literature search based on a combination of manual and computer-based methods was conducted on four English databases （PubMed,Science Direct,SpringerLink,and EBSCO） and three Chinese databases （Wanfang,CQVIP,and Chinese National Knowledge Infrastructure databases）.Pooled odds ratios （ORs） and 95％ confidence intervals （95％ Cls） were calculated using either the fixed-effects model or the random-effects model for different genetic models based on the heterogeneity examination.Results A total of six studies comprising 1 497 confirmed TB cases and 1 802 controls were included in this meta-analysis.Overall,no significant association was observed between IFNGR1-56C/T polymorphism and TB susceptibility （C vs.T,OR=0.90,95％ Cl 0.69-1.17; CC vs.TT,OR=0.87,95％ Cl 0.65-1.18; TC vs.TT,OR=-1.031,95％ Cl 0.872-1.219; CC＋TC vs.TT,OR=0.89,95％ Cl 0.64-1.26; CC vs.TC＋TT,OR=0.92,95％ Cl 0.66-1.29）.In subgroup analysis,a significant association was found in the dominant model （CC＋TC vs.TT,OR=1.24,95％ Cl 1.02-1.51） in Africans,but not in Asians or Caucasians.Conclusions Our meta-analysis did not provide enough powerful evidence to identify a significant association between IFNGR1-56C/T polymorphism and TB susceptibility in the overall population.In subgroup analysis,it indicates that IFNGR1-56C/T is possibly associated with increased TB risk in Africans,but not in Asians or Caucasians.However,larger sample size and better-designed case-control studies are needed to validate these findings.展开更多
Summary: The inhibitory mechanism of interferon-gamma (IFN-γ) on the fibroblasts from Tenon's capsule was studied. By using immunohistochemical SP method and pathological image system, the inhibitory effects of I...Summary: The inhibitory mechanism of interferon-gamma (IFN-γ) on the fibroblasts from Tenon's capsule was studied. By using immunohistochemical SP method and pathological image system, the inhibitory effects of IFN-γ on the expression of transforming growth factor beta receptor I in the in vitro cultured fibroblasts from Tenon's capsule were quantitatively analyzed. The results showed that IFN-γ could reduce the expression of transforming growth factor beta receptor I in the fibroblasts with the following dose-effect relationship: Y=1937.5-134.2 Igx (r=-0.971, P<0.01). It was concluded that IFN-γ could inhibit the expression of transforming growth factor beta receptor I in the fibroblasts from Tenon's capsule. The modulation of the transforming growth factor beta receptor I expression by IFN-γ may be beneficial to the alleviation of the hyperplasia of scar after trabeculectomy.展开更多
文摘Background Genetic variations in the interferon-gamma （IFN-γ） receptor 1 gene （IFNGR1） may contribute to tuberculosis （TB） risk in different populations.Many studies have investigated the relationship between IFNGR1 56C/T polymorphism and the susceptibility to TB,but have yielded conflicting results.A comprehensive meta-analysis is needed to provide a more accurate estimation of the relationship between them.Methods A literature search based on a combination of manual and computer-based methods was conducted on four English databases （PubMed,Science Direct,SpringerLink,and EBSCO） and three Chinese databases （Wanfang,CQVIP,and Chinese National Knowledge Infrastructure databases）.Pooled odds ratios （ORs） and 95％ confidence intervals （95％ Cls） were calculated using either the fixed-effects model or the random-effects model for different genetic models based on the heterogeneity examination.Results A total of six studies comprising 1 497 confirmed TB cases and 1 802 controls were included in this meta-analysis.Overall,no significant association was observed between IFNGR1-56C/T polymorphism and TB susceptibility （C vs.T,OR=0.90,95％ Cl 0.69-1.17; CC vs.TT,OR=0.87,95％ Cl 0.65-1.18; TC vs.TT,OR=-1.031,95％ Cl 0.872-1.219; CC＋TC vs.TT,OR=0.89,95％ Cl 0.64-1.26; CC vs.TC＋TT,OR=0.92,95％ Cl 0.66-1.29）.In subgroup analysis,a significant association was found in the dominant model （CC＋TC vs.TT,OR=1.24,95％ Cl 1.02-1.51） in Africans,but not in Asians or Caucasians.Conclusions Our meta-analysis did not provide enough powerful evidence to identify a significant association between IFNGR1-56C/T polymorphism and TB susceptibility in the overall population.In subgroup analysis,it indicates that IFNGR1-56C/T is possibly associated with increased TB risk in Africans,but not in Asians or Caucasians.However,larger sample size and better-designed case-control studies are needed to validate these findings.
基金ThisprojectwassupportedbyagrantfromHubeiProvincialNaturalSciencesFoundationofChina (No .4 183) .
文摘Summary: The inhibitory mechanism of interferon-gamma (IFN-γ) on the fibroblasts from Tenon's capsule was studied. By using immunohistochemical SP method and pathological image system, the inhibitory effects of IFN-γ on the expression of transforming growth factor beta receptor I in the in vitro cultured fibroblasts from Tenon's capsule were quantitatively analyzed. The results showed that IFN-γ could reduce the expression of transforming growth factor beta receptor I in the fibroblasts with the following dose-effect relationship: Y=1937.5-134.2 Igx (r=-0.971, P<0.01). It was concluded that IFN-γ could inhibit the expression of transforming growth factor beta receptor I in the fibroblasts from Tenon's capsule. The modulation of the transforming growth factor beta receptor I expression by IFN-γ may be beneficial to the alleviation of the hyperplasia of scar after trabeculectomy.
基金supported by National Natural Science Foundation of China(81470250)National Natural Science Foundation of China(81270110)+2 种基金National Natural Science Foundation of China(81473406)Zhejiang Natural Science Foundation(Q16H010010)Science and Technology Project of Wenzhou City(Y20140048)~~
文摘目的:探讨带状疱疹患者的免疫功能状态。方法:采用双抗夹心酶免疫法和酶免疫法检测66例带状疱疹患者血清和水疱的白介素2、游离白介素2受体、r 干扰素和水痘-带状疱疹病毒/IgG 抗体。结果:带状疱疹患者血清白介素2水平高于正常人,水疱中游离白介素2受体、r 干扰素水平高于自身血清,水疱中水痘-带状疱疹病毒/IgG 抗体阳性检出率低于自身血清。结论:带状疱疹患者 T 淋巴细胞功能处于激活状态;白介素2可能是带状疱疹血清中促进病毒消退的主要细胞因子之一;而局部抗病毒的作用 r 干扰素可能强于白介素2。
