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Association of miR-146a rs2910164 with childhood IgA nephropathy

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Abstract

Background

Micro-RNAs (miRNAs) play important roles in the regulation of immune response and inflammation. The purpose of this study was to investigate the association between three single nucleotide polymorphisms (SNPs) (mir-146a rs2910164, let-7a-2 rs1143770, miR-196a2 rs11614913) and susceptibility to and severity of childhood immunoglobulin A (IgA) nephropathy (IgAN).

Methods

We genotyped three miRNA SNPs in two independent Han Chinese populations composed of 158 patients and 265 controls (discovery set), and 246 patients and 446 controls (validation set), respectively.

Results

We found that rs2910164 was significantly associated with IgAN in the discovery but not the validation set. Combined analysis revealed that rs2910164 CC and CG genotypes were associated with increased risk of IgAN compared with the GG genotype [adjusted odds ratios (OR) = 1.684, 95 % confidence interval (CI)1.190–2.384, P = 0.003; adjusted OR = 1.472, 95 % CI 1.079–2.007, P = 0.015, respectively). We also found that the frequency of the rs2910164 CC genotype was significantly higher in patients with Haas grade III–V than in those with Haas grade I–II for all study populations (P < 0.05). The expression of miR-146a in normal renal tissues with CC genotype was lower than in those with a G allele (P = 0.038).

Conclusions

These results indicated that rs2910164 may affect the susceptibility and severity of pediatric IgAN. Further studies are needed to validate these findings.

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Acknowledgments

This work was supported in part by a Key Grant from the Taizhou Science and Technology Agency, China (131ky14-4).

Conflict of interest

None.

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Authors and Affiliations

  1. Medical School of Taizhou University, Taizhou, Zhejiang, China

    Junhong Lin

  2. Department of Pediatrics, Taizhou Hospital, Taizhou, Zhejiang, China

    Yao Huang

  3. Taizhou Central Hospital, Taizhou, Zhejiang, China

    Xuelin Zhang & Junbin Chen

  4. National Engineering Center for Biochip at Shanghai, Shanghai, China

    Haihui Sheng

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  1. Junhong Lin
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  2. Yao Huang
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Corresponding author

Correspondence to Junhong Lin.

Additional information

Junhong Lin and Yao Huang contributed equally to this work.

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Lin, J., Huang, Y., Zhang, X. et al. Association of miR-146a rs2910164 with childhood IgA nephropathy. Pediatr Nephrol 29, 1979–1986 (2014). https://doi.org/10.1007/s00467-014-2818-3

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  • DOI: https://doi.org/10.1007/s00467-014-2818-3

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