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Int. J. Mol. Sci. 2014, 15(5), 7684-7698; doi:10.3390/ijms15057684

Different Role of Tumor Necrosis Factor-α Polymorphism in Non-Hodgkin Lymphomas among Caucasian and Asian Populations: A Meta-Analysis

†,* ,
Medical Research Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 12 March 2014 / Revised: 15 April 2014 / Accepted: 23 April 2014 / Published: 5 May 2014
(This article belongs to the Collection Human Single Nucleotide Polymorphisms and Disease Diagnostics)
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Tumor necrosis factor-α (TNF-α) is an immunoregulatory cytokine involved in B- and T-cell function, and also plays an important role in inflammation and cancer. TNF-α-308G>A has been associated with constitutively elevated TNF-α expression. Several studies have reported the association between the TNF-α-308G>A polymorphism and non-Hodgkin lymphomas (NHL) risk, however, results are still inconsistent. To solve these conflicts, we conducted the first meta-analysis to assess the effect of TNF-α-308G>A polymorphism on the risk of NHL and various subtypes (additive model) including 10,619 cases and 12,977 controls in Caucasian and Asian populations. Our meta-analysis indicated that TNF-α-308G>A polymorphism is not associated with NHL risk when pooling all studies together (OR = 1.06, 95% CI: 0.92–1.23, p = 0.413). In stratified analyses, we found TNF-α-308A allele was significantly associated with higher risk of NHL, B-cell lymphomas (BCL), T-cell lymphomas (TCL) and diffuse large B-cell lymphomas (DLBCL) in Caucasians (OR = 1.22, 95% CI: 1.06–1.40, p = 0.007; OR = 1.18, 95% CI: 1.03–1.34, p = 0.014; OR = 1.20, 95% CI: 1.01–1.42, p = 0.040; OR = 1.21, 95% CI: 1.11–1.32, p < 0.001, respectively). Interestingly, it was associated with decreased risk of NHL, BCL and DLBCL in Asians (OR = 0.75, 95% CI: 0.66–0.86, p < 0.001; OR = 0.70, 95% CI: 0.52–0.94, p = 0.018; OR = 0.70, 95% CI: 0.57–0.86, p = 0.001). These findings also suggest TNF-α might play a distinct role in pathogenesis of NHL in different populations.
Keywords: TNF-α; polymorphism; NHL risk; meta-analysis; case-control TNF-α; polymorphism; NHL risk; meta-analysis; case-control
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Zhai, K.; Ding, J.; Zhou, Y. Different Role of Tumor Necrosis Factor-α Polymorphism in Non-Hodgkin Lymphomas among Caucasian and Asian Populations: A Meta-Analysis. Int. J. Mol. Sci. 2014, 15, 7684-7698.

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