Genome-wide association analysis of cystatin-C kidney function in continental Africa.
Continental Africa
Cystatin-C
Estimated glomerular filtration rate
Fine-mapping
Genome-wide association study
Kidney function
Journal
EBioMedicine
ISSN: 2352-3964
Titre abrégé: EBioMedicine
Pays: Netherlands
ID NLM: 101647039
Informations de publication
Date de publication:
Sep 2023
Sep 2023
Historique:
received:
05
06
2023
revised:
08
08
2023
accepted:
11
08
2023
medline:
18
9
2023
pubmed:
29
8
2023
entrez:
28
8
2023
Statut:
ppublish
Résumé
Chronic kidney disease is becoming more prevalent in Africa, and its genetic determinants are poorly understood. Creatinine-based estimated glomerular filtration rate (eGFR) is commonly used to estimate kidney function, modelling the excretion of the endogenous biomarker (creatinine). However, eGFR based on creatinine has been shown to inadequately detect individuals with low kidney function in Sub-Saharan Africa, with eGFR based on cystatin-C (eGFRcys) exhibiting significantly superior performance. Therefore, we opted to conduct a GWAS for eGFRcys. Using the Uganda Genomic Resource, we performed a genome-wide association study (GWAS) of eGFRcys in 5877 Ugandans and evaluated replication in independent studies. Subsequently, putative causal variants were screened through Bayesian fine-mapping. Functional annotation of the GWAS loci was performed using Functional Mapping and Annotation (FUMA). Three independent lead single nucleotide polymorphisms (SNPs) (P-value <5 × 10 Our study found two previously unreported associated SNPs for eGFRcys in continental Africans (rs59288815 and rs4277141) and validated a previously well-established SNP (rs911119) for eGFRcys. The identified gene-set enrichment for the G-protein signalling pathways relates to the capacity of the kidney to readily adapt to an ever-changing environment. Additional GWASs are required to represent the diverse regions in Africa. Wellcome (220740/Z/20/Z).
Sections du résumé
BACKGROUND
BACKGROUND
Chronic kidney disease is becoming more prevalent in Africa, and its genetic determinants are poorly understood. Creatinine-based estimated glomerular filtration rate (eGFR) is commonly used to estimate kidney function, modelling the excretion of the endogenous biomarker (creatinine). However, eGFR based on creatinine has been shown to inadequately detect individuals with low kidney function in Sub-Saharan Africa, with eGFR based on cystatin-C (eGFRcys) exhibiting significantly superior performance. Therefore, we opted to conduct a GWAS for eGFRcys.
METHODS
METHODS
Using the Uganda Genomic Resource, we performed a genome-wide association study (GWAS) of eGFRcys in 5877 Ugandans and evaluated replication in independent studies. Subsequently, putative causal variants were screened through Bayesian fine-mapping. Functional annotation of the GWAS loci was performed using Functional Mapping and Annotation (FUMA).
FINDINGS
RESULTS
Three independent lead single nucleotide polymorphisms (SNPs) (P-value <5 × 10
INTERPRETATION
CONCLUSIONS
Our study found two previously unreported associated SNPs for eGFRcys in continental Africans (rs59288815 and rs4277141) and validated a previously well-established SNP (rs911119) for eGFRcys. The identified gene-set enrichment for the G-protein signalling pathways relates to the capacity of the kidney to readily adapt to an ever-changing environment. Additional GWASs are required to represent the diverse regions in Africa.
FUNDING
BACKGROUND
Wellcome (220740/Z/20/Z).
Identifiants
pubmed: 37639939
pii: S2352-3964(23)00341-9
doi: 10.1016/j.ebiom.2023.104775
pmc: PMC10474146
pii:
doi:
Substances chimiques
Creatinine
AYI8EX34EU
Cystatin C
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
104775Subventions
Organisme : Wellcome Trust
Pays : United Kingdom
Organisme : Medical Research Council
ID : MC_UU_00033/3
Pays : United Kingdom
Informations de copyright
Copyright © 2023 The Authors. Published by Elsevier B.V. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of interests None declared.