Association of Interleukin-2 Gene Polymorphism with Henoch-schönlein Purpura Nephritis

Jiajia Cao; Junfeng Zhang; Hui Xu; Wei Li; Jianrong Shi; Qing Ye

doi:10.18502/ijaai.v22i3.13060

Jiajia Cao Department of clinical laboratory, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, China
Junfeng Zhang Department of clinical laboratory, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, China
Hui Xu Department of clinical laboratory, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, China
Wei Li Department of clinical laboratory, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, China
Jianrong Shi Department of clinical laboratory, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, China
Qing Ye Department of clinical laboratory, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, China

DOI: https://doi.org/10.18502/ijaai.v22i3.13060

Keywords: Henoch-Schönlein purpura nephritis; Interleukin-2; Polymorphism

Abstract

Henoch-Schönlein purpura nephritis (HSPN) is a common vasculitis that mostly affects children, and previous studies have indicated that genetic factors may influence disease susceptibility. The aim of this study was to evaluate a possible association of three interleukin-2
(IL-2) gene polymorphisms (rs3136534, rs2069776, and rs2069762) with HSPN in the Chinese population.

A total of 81 patients with HSPN and 200 healthy children were enrolled. The distribution of genotypes, allelic frequencies, and haplotype frequencies among the three IL-2 polymorphisms were analyzed using the Sequenom MassARRAY system by means of matrix-assisted laser desorption ionization-time of flight mass spectrometry method.

Compared to the healthy controls, genotyping analysis demonstrated rs3136534 was associated with a decreased HSPN risk in the dominant inheritance model (G/T+T/T vs. G/G; OR, 0.54; 95% CI, 0.31–0.93). However, the frequency of the T allele and haplotypes of rs3136534 showed no statistical significance. For the frequency of genotype, allele, and haplotype of the rs2069776 and rs20697622 polymorphisms, no significant differences were observed between HSPN patients and controls.

Our results suggest that the rs3136534 polymorphism of the IL-2 gene is associated with susceptibility to HSPN in Chinese children.