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. 2021 Oct 15;12(10):1765-1777.
doi: 10.4239/wjd.v12.i10.1765.

Diabetic kidney disease: Are the reported associations with single-nucleotide polymorphisms disease-specific?

Marek Saracyn  1 , Bartłomiej Kisiel  2 , Maria Franaszczyk  3 , Dorota Brodowska-Kania  1 , Wawrzyniec Żmudzki  1 , Robert Małecki  4 , Longin Niemczyk  5 , Przemysław Dyrla  6 , Grzegorz Kamiński  7 , Rafał Płoski  8 , Stanisław Niemczyk  1
Affiliations

Diabetic kidney disease: Are the reported associations with single-nucleotide polymorphisms disease-specific?

Marek Saracyn et al. World J Diabetes. .

Abstract

Background: The genetic backgrounds of diabetic kidney disease (DKD) and end-stage kidney disease (ESKD) have not been fully elucidated.

Aim: To examine the individual and cumulative effects of single-nucleotide polymorphisms (SNPs) previously associated with DKD on the risk for ESKD of diabetic etiology and to determine if any associations observed were specific for DKD.

Methods: Fourteen SNPs were genotyped in hemodialyzed 136 patients with diabetic ESKD (DKD group) and 121 patients with non-diabetic ESKD (NDKD group). Patients were also re-classified on the basis of the primary cause of chronic kidney disease (CKD). The distribution of alleles was compared between diabetic and non-diabetic groups as well as between different sub-phenotypes. The weighted multilocus genetic risk score (GRS) was calculated to estimate the cumulative risk conferred by all SNPs. The GRS distribution was then compared between the DKD and NDKD groups as well as in the groups according to the primary cause of CKD.

Results: One SNP (rs841853; SLC2A1) showed a nominal association with DKD (P = 0.048; P > 0.05 after Bonferroni correction). The GRS was higher in the DKD group (0.615 ± 0.260) than in the NDKD group (0.590 ± 0.253), but the difference was not significant (P = 0.46). The analysis of associations between GRS and individual factors did not show any significant correlation. However, the GRS was significantly higher in patients with glomerular disease than in those with tubulointerstitial disease (P = 0.014) and in those with a combined group (tubulointerstitial, vascular, and cystic and congenital disease) (P = 0.018).

Conclusion: Our results suggest that selected SNPs that were previously associated with DKD may not be specific for DKD and may confer risk for CKD of different etiology, particularly those affecting renal glomeruli.

Keywords: Chronic kidney disease; Diabetes mellitus; Diabetic kidney disease; End-stage kidney disease; Single-nucleotide polymorphism.

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Conflict of interest statement

Conflict-of-interest statement: The authors declare that they have no competing financial interests. No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article.

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