Atlas of glomerular disease-specific genetic effects on blood transcriptome.
medRxiv 2026 Jun 24.

Abstract

IgA nephropathy (IgAN), IgA vasculitis (IgAV), focal segmental glomerulosclerosis (FSGS), membranous nephropathy (MN), and minimal change disease (MCD) account for the majority of idiopathic glomerulo-nephropathies (GN). These disorders involve immune system dysregulation and have a complex genetic architecture. Currently, there are no adequately powered blood transcriptomic datasets coupled to genetic data from patients with GN that can delineate disease-context specific genetic effects on blood immune cell transcriptome. We performed whole genome sequencing coupled with bulk blood transcriptome sequencing on 1,822 participants from the CureGN study, a prospective cohort of participants with a kidney biopsy diagnosis of primary GN. We generated disease-context specific transcriptome-wide maps of gene expression QTL (eQTL), splicing QTL (sQTL), and double strand RNA-editing QTL (edQTL) for FSGS (N=447), IgAN (N=403), IgAV (N=123), MCD (N=408), and MN (N=441), as well as cross-disease maps for all 1,822 participants. Our QTL mapping identified 16,068 eGenes, 4,644 sGenes and 4,611 edQTLs with an FDR<0.05 in at least one GN type. Approximately 5-10% of the QTL signals were unique to a specific GN type, while ∼90% were shared between at least two conditions. Colocalization analysis demonstrated that ∼80% of shared eGenes between traits also shared the same causal variants, whereas ∼2% had distinct causal variants, suggesting context-specific regulatory effects. Cross-phenotype QTL mapping uncovered 6,466 eGenes, 2,705 sGenes and 5,321 edQTLs not previously detected in GTEx. Age, eGFR, and proteinuria-interaction QTL analyses identified hundreds of loci modified by age and disease severity. Lastly, integrative analyses with GWAS nominated new candidate genes for each of the five GN types under study. In summary, we generated comprehensive maps of GN-context-specific genetic effects on blood transcriptome, providing a powerful resource for integrative gene discovery studies of primary GN.

Authors

Liu LNo affiliation info available
Wang CNo affiliation info available
Kravets ONo affiliation info available
Fermin DNo affiliation info available
Eichinger FNo affiliation info available
Zanoni FNo affiliation info available
Khan ANo affiliation info available
Zhang JYNo affiliation info available
Ouyang YNo affiliation info available
Li QNo affiliation info available
Hamilton PNo affiliation info available
Kalra PANo affiliation info available
Chinnadurai RNo affiliation info available
Reidy KNo affiliation info available
Kopp JNo affiliation info available
Mucha KNo affiliation info available
Smith CNo affiliation info available
Smith ANo affiliation info available
Mcnulty MNo affiliation info available
Eddy SNo affiliation info available
Nair VNo affiliation info available
Helmuth MNo affiliation info available
Klunder BNo affiliation info available
Vasylyeva TNo affiliation info available
Smoyer WNo affiliation info available
Berthier CNo affiliation info available
Parekh RNo affiliation info available
Wenderfer SNo affiliation info available
Martin TNo affiliation info available
Solkolva KNo affiliation info available
Sealfon RNo affiliation info available
Theesfeld CNo affiliation info available
Parsa ANo affiliation info available
Gbadegesin RNo affiliation info available
Sampson MNo affiliation info available
Sanna-Cherchi SNo affiliation info available
Troyanskaya ONo affiliation info available
Paul DSNo affiliation info available
Petrovski SNo affiliation info available
Goldstein DNo affiliation info available
Mariani LHNo affiliation info available
Gharavi ANo affiliation info available
Columbia Genomics ConsortiumNo affiliation info available
NEPTUNE ConsortiumNo affiliation info available
CureGN ConsortiumNo affiliation info available
Kretzler MNo affiliation info available
Kiryluk KNo affiliation info available

Pub Type(s)

Journal Article
Preprint

Language

eng

PubMed ID

42396300