Association of IL-4 (− 590 C/T) and IL-6 (− 174 G/C) gene polymorphism in South Indian CKD patients

Author:

Sevak Vandit,Chinniah Rathika,Pandi Sasiharan,Sampathkumar K.,Dinakaran T.,Karuppiah Balakrishnan

Abstract

Abstract Aim The present study was undertaken to examine the role of IL-4 (− 590 C/T) (rs2243250) and IL-6 (− 174G/C) (rs1800795) polymorphism and the serum levels of IL-4 and IL-6 in chronic kidney disease (CKD). Methods The IL-4 (− 590C/T) and IL-6 (− 174 G/C) polymorphisms were genotyped in 132 CKD patients and 161 controls using PCR–RFLP. Serum IL-4 and IL-6 quantifications were performed by ELISA. Results Significant susceptible associations of CT genotype (OR = 4.56; p < 1.84 × 10–9) and T allele (OR = 1.56; p < 0.010) of IL-4 (− 590C/T) and CC genotype (OR = 2.63; p < 0.032) of IL-6 (− 174G/C) were observed for CKD. The CC genotype (OR = 0.27; p < 9.314 × 10–7) and C allele (OR = 0.63; p < 0.010) of IL-4 (− 590 C/T) revealed strong protective associations. Five-fold increased levels were observed for both IL-6 (p < 0.0001) and IL-4 (p < 0.0043) cytokines in CKD patients than the controls. The IL-4 serum levels (pg/ml) increased significantly in patients with CT and TT genotypes of IL-4 (− 590 C/T) than the controls (6.18 ± 1.80 vs. 3.33 ± 0.48 and 6.14 ± 1.96 vs. 3.21 ± 0.56 respectively). For IL-6 (− 174 G/C) polymorphism, the patients with CC genotype (6.50 ± 1.30 vs. 3.49 ± 1.39) revealed with higher IL-6 serum levels followed by GC genotype (5.00 ± 1.91 vs. 4.01 ± 1.74). Conclusion The genotypes of IL-4 (590 C/T) and IL-6 (174 G/C) polymorphisms contribute differential susceptibility in south Indian CKD patients. A fivefold increased serum levels of IL-4 (anti-inflammatory) and IL-6 (pro- and anti-inflammatory) cytokines were documented in CKD patients. There observed an opposite trend in disease association for these two cytokines and associated SNPs with CKD in south India.

Publisher

Springer Science and Business Media LLC

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