title: Genetic association of TLR4 Asp299Gly, TLR4 Thr399Ile, and CD14 C-159T polymorphisms with the risk of severe RSV infection: a meta-analysis.
abstract: Respiratory syncytial virus (RSV) is the most frequent cause of hospitalization in infants worldwide. It is recognized by Toll-like receptor 4 (TLR 4) and cluster of differentiation 14 (CD14) in the innate immune response. Previous case-control studies reported the influence of TLR4 Asp299Gly, TLR4 Thr399Ile, and CD14 C-159T polymorphisms on the risk of severe RSV infection. However, a decisive conclusion has not been achieved. Therefore, we performed this meta-analysis to examine the association between these three polymorphisms and the development of RSV bronchiolitis. A systematic literature search was performed using the PubMed, EMbase, Google Scholar Search, China National Knowledge Infrastructure, China Biological Medicine, and Wanfang Databases. The data were extracted and pooled odds ratios with 95% confidence intervals were calculated under six genetic models. A total of six studies with 1009 cases and 1348 controls, three studies with 473 cases and 481 controls, or four studies with 325 cases and 650 controls relating to each of the three polymorphisms were included in this meta-analysis. The analyzed data indicated that all of these polymorphisms were not associated with the risk of severe RSV infection. This is the first meta-analysis to investigate the relationship of TLR4 Asp299Gly, TLR4 Thr399Ile, and CD14 C-159T polymorphisms with the risk of severe RSV infection. Although the results of this retrospective analysis indicated a lack of the association, more extensive multicentric studies with large sample sizes are necessary to provide a more reliable estimation of the association between these three polymorphisms and RSV bronchiolitis susceptibility.
authors.affiliation: China-America Cancer Research Institute, Dongguan Scientific Research Center, Guangdong Medical University, Dongguan, Guangdong, China.|Key Laboratory for Medical Molecular Diagnostics of Guangdong Province, Dongguan, Guangdong, China.|Department of Pathophysiology, Guangdong Medical University, Dongguan, Guangdong, China.
authors.forename: Jiahui
authors.initials: J
authors.lastname: Zhou
authors.affiliation: China-America Cancer Research Institute, Dongguan Scientific Research Center, Guangdong Medical University, Dongguan, Guangdong, China.|Key Laboratory for Medical Molecular Diagnostics of Guangdong Province, Dongguan, Guangdong, China.|Department of Pathophysiology, Guangdong Medical University, Dongguan, Guangdong, China.
authors.forename: Xiangning
authors.initials: X
authors.lastname: Zhang
authors.affiliation: China-America Cancer Research Institute, Dongguan Scientific Research Center, Guangdong Medical University, Dongguan, Guangdong, China.|Key Laboratory for Medical Molecular Diagnostics of Guangdong Province, Dongguan, Guangdong, China.|Department of Pathophysiology, Guangdong Medical University, Dongguan, Guangdong, China.
authors.forename: Shuming
authors.initials: S
authors.lastname: Liu
authors.affiliation: China-America Cancer Research Institute, Dongguan Scientific Research Center, Guangdong Medical University, Dongguan, Guangdong, China.|Key Laboratory for Medical Molecular Diagnostics of Guangdong Province, Dongguan, Guangdong, China.|Department of Pathophysiology, Guangdong Medical University, Dongguan, Guangdong, China.
authors.forename: Ziyou
authors.initials: Z
authors.lastname: Wang
authors.affiliation: School of Preclinical Medicine, Guangxi Medical University, Nanning, Guangxi, China.
authors.forename: Qicong
authors.initials: Q
authors.lastname: Chen
authors.affiliation: Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China.
authors.forename: Yongfu
authors.initials: Y
authors.lastname: Wu
authors.affiliation: China-America Cancer Research Institute, Dongguan Scientific Research Center, Guangdong Medical University, Dongguan, Guangdong, China.|Key Laboratory for Medical Molecular Diagnostics of Guangdong Province, Dongguan, Guangdong, China.|Department of Pathophysiology, Guangdong Medical University, Dongguan, Guangdong, China.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: He
authors.affiliation: China-America Cancer Research Institute, Dongguan Scientific Research Center, Guangdong Medical University, Dongguan, Guangdong, China.|Key Laboratory for Medical Molecular Diagnostics of Guangdong Province, Dongguan, Guangdong, China.|Department of Pathophysiology, Guangdong Medical University, Dongguan, Guangdong, China.
authors.forename: Zunnan
authors.initials: Z
authors.lastname: Huang
mesh_terms: D001988:Bronchiolitis / Q000235:genetics / Q000821:virology*; D016022:Case-Control Studies; D002681:China; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D018950:Lipopolysaccharide Receptors / Q000235:genetics*; D016017:Odds Ratio; D020641:Polymorphism, Single Nucleotide; D018357:Respiratory Syncytial Virus Infections / Q000235:genetics* / Q000276:immunology / Q000821:virology; D012189:Retrospective Studies; D012307:Risk Factors; D051197:Toll-Like Receptor 4 / Q000235:genetics*
chemical_list: D018950:Lipopolysaccharide Receptors; C495345:TLR4 protein, human; D051197:Toll-Like Receptor 4
keywords: Asp299Gly; C-159T; CD14; RSV infection; TLR4; Thr399Ile; meta-analysis; polymorphisms