Interleukin Variants Are Associated with the Development and Progression of IgA Nephropathy: A Candidate-Gene Association Study and Meta-Analysis

Overview

Journal Int J Mol Sci

Publisher MDPI

Specialties Biochemistry
Chemistry
Molecular Biology

Date 2023 Nov 25

PMID 38003536

Authors

Ioanna Chronopoulou

Maria Tziastoudi

Georgios Pissas

Efthimios Dardiotis

Maria Dardioti

Spyridon Golfinopoulos

Georgios Filippidis

Peter R Mertens

Evangelia E Tsironi

Vassilios Liakopoulos

Theodoros Eleftheriadis

Ioannis Stefanidis

Affiliations

Soon will be listed here.

Abstract

The interleukin-1 gene cluster encodes cytokines, which modulate mesangial cell proliferation and matrix expansion, both constituting central factors in the development and progression of immunoglobulin A nephropathy (IgAN). A candidate-gene study was performed to examine the association of polymorphisms of the interleukin-1 gene cluster with the risk of progressive IgAN. To gain deeper insights into the involvement of interleukin genes in IgAN, a meta-analysis of genetic association studies (GAS) that examine the association between interleukin variants and IgAN was conducted. Association study: The case-control study consisted of 121 unrelated Caucasians with sporadic, histologically diagnosed IgAN and of 246 age- and sex-matched healthy controls. Persistent proteinuria (>2 g/24 h) and/or impaired kidney function (serum creatinine > 1.5 mg/dL) defined progressive (n = 67) vs. non-progressive (n = 54) IgAN cases. Genotypes were assessed for two promoter-region single-nucleotide polymorphisms, C-899T (rs1800587) in and C-511T (rs16944) in , and for one penta-allelic variable-length tandem repeat polymorphism (VNTR 86 bp intron 2) in . The association of these variants with the susceptibility of IgAN and the development of progressive IgAN (healthy status, IgAN, progressive IgAN) was tested using the generalized odds ratio (OR) metric. Linkage disequilibrium and haplotype analysis were also performed. Meta-analysis: We included in the meta-analysis 15 studies investigating association between 14 interleukin variants harbored in eight different genes and IgAN. The OR was used to evaluate the association between interleukin variants and IgAN using random effects models. The present case-control study revealed association of C-511T (rs16944) with the progression of IgAN ( = 0.041; OR = 2.11 (1.09-4.07)). On haplotype analysis, significant results were derived for the haplotypes C-C-1 ( = 0.005; OR = 0.456 (0.261~0.797)) and C-T-2 ( = 0.003; OR = 4.208 (1.545-11.50)). Regarding association and meta-analysis results, variants in (rs1143627 and rs16944), (rs928940, rs439154, and rs315951) and (rs1800871) were associated with IgAN based on either genotype or allele counts. Genetic variants and haplotypes in the , and genes might contribute to an increased risk for development and progression of IgAN.

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