期刊
HUMAN IMMUNOLOGY
卷 71, 期 7, 页码 692-696出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.humimm.2010.03.008
关键词
M. tuberculosis; IFN-gamma; Genetic polymorphism
类别
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico-CNPq
Regarding the importance of interferon-gamma(IFN-gamma) in protective immunity against Mycobacterium tuberculosis and the functional role of IFNG +8741/A single nucleotide polymorphism (SNP) in the IFN-gamma production, the present study investigated the relationship of this genetic polymorphism with susceptibility to tuberculosis (TB). A total of 129 patients with pulmonary tuberculosis (PTB), 33 with extrapulmonary tuberculosis (EPTB), and 156 control subjects were studied. Blood samples were drawn and plasma was used to measure IFN-gamma serum concentration by enzyme-linked immunoassay. DNA samples were extracted from leukocytes and used to investigate +8741/A polymorphism in IFNG gene using allele-specific oligonucleotide polymerase chain reaction. An association between the presence of the allele +874A and the genotype +874AA with the active tuberculosis was found (p < 0.0001, 95% confidence interval = 1.64-3.22). at the same time that allele + 874T and genotype +874T/T were more frequent in the control group. The average plasma concentration of IFN-gamma among patients with tuberculosis was significantly lower than in the control group, and were lower in the EPTB group than in the group with PTB, suggesting a relationship of low plasma levels of this cytokine with active tuberculosis and the progression to more serious forms of the disease. Furthermore, we observed the association of the +874T/T and +874A/A genotypes with high and low IFN-gamma plasma concentrations, respectively, both in TB patients and in the control groups. Thus our findings suggest an association of the IFNG +874T/A polymorphism with susceptibility to M. tuberculosis infection in the studied population. (C) 2010 American Society for Histocompatibility and Immunogenetics. Published by Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据