The -2518A/G Polymorphism in the MCP-1 Gene and Tuberculosis Risk: A Meta-Analysis

Abstract

BackgroundThe -2518A/G polymorphism in the monocyte chemoattractant protein-1 (MCP-1) gene has been implicated in the susceptibility to tuberculosis (TB), but the results are not conclusive. The aim of this study is to investigate the association between the -2518A/G polymorphism in the MCP-1 gene and the risk of tuberculosis by meta-analysis.MethodsWe searched Pubmed, Embase, CNKI and Wanfang databases, covering all studies until April 29th, 2011. Statistical analyses were performed using the Revman4.2 and STATA10.0 software.ResultsA total of 5341 cases and 6075 controls in 13 case-control studies were included in the meta-analysis. The results indicated that the GG homozygote carriers had a 67% increased risk of TB compared with the A allele carriers (GG vs. GA+AA: OR = 1.67, 95%CI = 1.25–2.23, P = 0.0006). In the subgroup analysis by ethnicity, significant elevated risks were found in Asians and Latinos, but not in Africans (GG vs. GA+AA: OR = 1.79, 95%CI = 1.19–2.70 and P = 0.005 for Asians; OR = 2.15, 95%CI = 1.32–3.51 and P = 0.002 for Latinos; OR = 1.28, 95%CI = 0.45–3.64 and P = 0.65 for Africans).ConclusionThis meta-analysis suggested that the -2518A/G polymorphism of MCP-1 gene would be a risk factor for TB in Asians and Latinos, while not in Africans.

Systematic meta-analysis of the association between monocyte chemoattractant protein-1 -2518A/G polymorphism and risk of tuberculosis

“…There were 3 previous meta-analyses that evaluated the association between the MCP-1 -2518A/G polymorphism and TB susceptibility (Feng et al, 2011;Zhang et al, 2012;Gong et al, 2013). Compared with these reports, ours revealed some new insights.…”

“…Zhang et al (2012) showed that significantly elevated risks were observed in Asians and Latinos, but not in Africans between the -2518A/G polymorphism in the MCP-1 gene and TB. Another group reported that the CCL2-2518G allele increased the risk of developing TB in Asians and Hispanics (Feng et al, 2012).…”

“…The African group included 5 studies [Buijtels et al, 2008;Möller et al, 2009;Thye et al, 2009;Velez Edwards et al, 2012 (2 case-control (Ben-Selma et al, 2011;Hussain et al, 2011;Arji et al, 2012). The Asian group included 10 studies (Flores-Villanueva et al, 2005;Chu et al, 2007;Alagarasu et al, 2009;Xu et al, 2009;Yang et al, 2009;Feng et al, 2011;Naderi et al, 2011;Mishra et al, 2012;Zhang et al, 2012;Singh et al, 2014). All studies analyzed the association between MCP-1 -2518A/G polymorphisms and human TB susceptibility.…”

Current immunogenetic predisposition to tuberculosis in the Moroccan population

“…Finally, meta‐analysis studies revealed that the MCP‐1‐2518G allele increased the risk of developing TB for Asians and Hispanics, but not for Africans (Feng et al., ; Tian et al., ; Zhang et al., ). More recently, these data have been well supported by the Vásquez‐Loarte meta‐analysis study; however, the authors stressed that this genetic analysis results were influenced significantly by the ethnicity of the study's subjects, as the MCP‐1‐ 2518G allele may not be associated with some Asian groups, such as those from India and Persia (Vásquez‐Loarte, Trubnykova, & Guio, ).…”

P2X7R Gene Polymorphisms are Associated with Increased Risk of Pulmonary Tuberculosis in the Tibetan Chinese Population

“…2 A 2014 World Health Organization report estimated that even though there are so many people infected with MTB, only one-third of the global population has been latently infected without clinical symptoms, and about 10% of infected individuals develop into active PTB during their lifetime. 3 Apart from bacterial variability, genetic host factors may also play a crucial role in an individual's predisposition to PTB. 4 Stead and others reported that individuals with African ancestry were twice as likely to be infected with MTB as individuals with European ancestry, even though they shared the same environment.…”