title: Correlation of an interleukin-4 gene polymorphism with susceptibility to severe enterovirus 71 infection in Chinese children.
abstract: Enterovirus 71 (EV71) has caused many outbreaks of diseases among children worldwide since it was first reported in 1974, but its mechanism of pathogenesis remains unclear. This study was designed to investigate the possible association of the IL-4 -589C/T gene polymorphism with severity of EV71 infection in Chinese children. The IL-4 -589C/T gene polymorphism was detected in EV71-infected subjects (n = 185), including those with mild cases (n = 102) and severe cases (n = 83) as well as healthy controls (n = 234), using an improved multiplex ligation detection reaction (iMLDR) technique. The plasma levels of IL-4 and IFN-γ were determined by enzyme-linked immunosorbent assays. The presence of the CC genotype (p = 0.022) and the C allele (OR, 2.1; 95 % CI, 1.3-3.6; p = 0.004) was significantly higher in severe cases. Furthermore, the CC genotype and C allele were also more frequently found in cases of EV71 encephalitis (p < 0.05). The plasma levels of IL-4 of the CC (7.9 ± 1.3 pg/mL, p < 0.001) and CT genotype (6.8 ± 2.1 pg/mL, p < 0.01) were significantly elevated compared to those of the TT genotype, but the plasma levels of IFN-γ and the IFN-γ/IL-4 ratio were significantly lower for the CC and CT genotypes than for the TT genotype (p < 0.05). These findings suggest that the IL-4 -589C allele could be a susceptibility factor in the development of EV71 disease in Chinese children.
authors: Pediatric Department, The Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Qingdao, 266003, People's Republic of China, lifei0615a@126.com.
authors: Fei
authors: F
authors: Li
authors: Xiang-Ping
authors: XP
authors: Liu
authors: Ji-An
authors: JA
authors: Li
authors: Zhen-Liang
authors: ZL
authors: Han
authors: Pei-Pei
authors: PP
authors: Liu
authors: Yuan-Yuan
authors: YY
authors: Wang
authors: Long
authors: L
authors: Song
authors: Zong-Bo
authors: ZB
authors: Chen
mesh_terms: D000483:Alleles; D044466:Asian People / Q000235:genetics*; D002648:Child; D002675:Child, Preschool; D002681:China; D029821:Enterovirus A, Human / Q000235:genetics / Q000502:physiology*; D004769:Enterovirus Infections / Q000097:blood / Q000235:genetics* / Q000821:virology; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007371:Interferon-gamma / Q000097:blood; D015847:Interleukin-4 / Q000097:blood / Q000235:genetics*; D008297:Male; D020641:Polymorphism, Single Nucleotide
chemical_list: D015847:Interleukin-4; D007371:Interferon-gamma