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Combined analysis of interleukin-10 gene polymorphisms and protein expression in children with cerebral palsy

Journal article
Authors L. Xia
M. Chen
D. Bi
J. Song
X. Zhang
Y. Wang
D. Zhu
Q. Shang
F. Xu
Xiaoyang Wang
Q. Xing
Changlian Zhu
Published in Frontiers in Neurology
Volume 9
Issue MAR
ISSN 1664-2295
Publication year 2018
Published at Institute of Neuroscience and Physiology
Language en
Links https://doi.org/10.3389/fneur.2018....
Keywords Cerebral palsy, Cytokine, Inflammation, Interleukin-10, Single nucleotide polymorphisms
Subject categories Neurophysiology

Abstract

Background: Interleukin-10 (IL-10) is an important anti-inflammatory and immunosuppressive cytokine, and it has indispensable functions in both the onset and development of inflammatory disorders. The association between persistent inflammation and the development of cerebral palsy (CP) has attracted much attention. Objective: The purpose of this study was to investigate whether IL-10 gene polymorphisms and plasma protein expression are associated with CP and to analyze the role of IL-10 in CP. Methods: A total of 282 CP patients and 197 healthy controls were genotyped for IL-10 polymorphisms (rs1554286, rs1518111, rs3024490, rs1800871, and rs1800896). Among them, 95 CP patients and 93 healthy controls were selected for plasma IL-10 measurement. Results: The differences in the rs3024490 (p = 0.033) and rs1800871 (p = 0.033) allele frequencies of IL-10 were determined between CP patients and controls. The frequencies of allele and genotype between CP patients with spastic tetraplegia and normal controls of IL-10 polymorphisms showed significant differences for rs1554286, rs151811, rs3024490, rs1800871, and rs1800896 (pallele = 0.015, 0.009, 0.006, 0.003, and 0.006, pgenotype = 0.039, 0.018, 0.027, 0.012, and 0.03, respectively). The plasma IL-10 protein level in CP patients was higher than normal controls (9.13 ± 0.77 vs. 6.73 ± 0.63 pg/ml, p = 0.017). IL-10 polymorphisms and protein association analysis showed that the TT genotype had higher plasma IL-10 protein levels compared to the GG + GT genotype at rs3024490 (11.14 ± 7.27 vs. 7.44 ± 6.95 pg/ml, p = 0.045, respectively) in CP cases. Conclusion: These findings provide an important contribution toward explaining the pleiotropic role of IL-10 in the complex etiology of CP. © 2018 Xia, Chen, Bi, Song, Zhang, Wang, Zhu, Shang, Xu, Wang, Xing and Zhu.

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