TY - JOUR
T1 - Genetic association for renal traits among participants of African Ancestry reveals new loci for renal function
AU - Liu, Ching Ti
AU - Garnaas, Maija K.
AU - Tin, Adrienne
AU - Kottgen, Anna
AU - Franceschini, Nora
AU - Peralta, Carmen A.
AU - de Boer, Ian H.
AU - Lu, Xiaoning
AU - Atkinson, Elizabeth
AU - Ding, Jingzhong
AU - Nalls, Michael
AU - Shriner, Daniel
AU - Coresh, Josef
AU - Kutlar, Abdullah
AU - Bibbins-Domingo, Kirsten
AU - Siscovick, David
AU - Akylbekova, Ermeg
AU - Wyatt, Sharon
AU - Astor, Brad
AU - Mychaleckjy, Josef
AU - Li, Man
AU - Reilly, Muredach P.
AU - Townsend, Raymond R.
AU - Adeyemo, Adebowale
AU - Zonderman, Alan B.
AU - de Andrade, Mariza
AU - Turner, Stephen T.
AU - Mosley, Thomas H.
AU - Harris, Tamara B.
AU - Rotimi, Charles N.
AU - Liu, Yongmei
AU - Kardia, Sharon L.R.
AU - Evans, Michele K.
AU - Shlipak, Michael G.
AU - Kramer, Holly
AU - Flessner, Michael F.
AU - Dreisbach, Albert W.
AU - Goessling, Wolfram
AU - Cupples, L. Adrienne
AU - Kao, W. Linda
AU - Fox, Caroline S.
PY - 2011/9
Y1 - 2011/9
N2 - Chronic kidney disease (CKD) is an increasing global public health concern, particularly among populations of African ancestry. We performed an interrogation of known renal loci, genome-wide association (GWA), and IBC candidate-gene SNP association analyses in African Americans from the CARe Renal Consortium. In up to 8,110 participants, we performed meta-analyses of GWA and IBC array data for estimated glomerular filtration rate (eGFR), CKD (eGFR <60 mL/min/1.73 m 2), urinary albumin-to-creatinine ratio (UACR), and microalbuminuria (UACR >30 mg/g) and interrogated the 250 kb flanking region around 24 SNPs previously identified in European Ancestry renal GWAS analyses. Findings were replicated in up to 4,358 African Americans. To assess function, individually identified genes were knocked down in zebrafish embryos by morpholino antisense oligonucleotides. Expression of kidney-specific genes was assessed by in situ hybridization, and glomerular filtration was evaluated by dextran clearance. Overall, 23 of 24 previously identified SNPs had direction-consistent associations with eGFR in African Americans, 2 of which achieved nominal significance (UMOD, PIP5K1B). Interrogation of the flanking regions uncovered 24 new index SNPs in African Americans, 12 of which were replicated (UMOD, ANXA9, GCKR, TFDP2, DAB2, VEGFA, ATXN2, GATM, SLC22A2, TMEM60, SLC6A13, and BCAS3). In addition, we identified 3 suggestive loci at DOK6 (p-value = 5.3×10 -7) and FNDC1 (p-value = 3.0×10 -7) for UACR, and KCNQ1 with eGFR (p = 3.6×10 -6). Morpholino knockdown of kcnq1 in the zebrafish resulted in abnormal kidney development and filtration capacity. We identified several SNPs in association with eGFR in African Ancestry individuals, as well as 3 suggestive loci for UACR and eGFR. Functional genetic studies support a role for kcnq1 in glomerular development in zebrafish.
AB - Chronic kidney disease (CKD) is an increasing global public health concern, particularly among populations of African ancestry. We performed an interrogation of known renal loci, genome-wide association (GWA), and IBC candidate-gene SNP association analyses in African Americans from the CARe Renal Consortium. In up to 8,110 participants, we performed meta-analyses of GWA and IBC array data for estimated glomerular filtration rate (eGFR), CKD (eGFR <60 mL/min/1.73 m 2), urinary albumin-to-creatinine ratio (UACR), and microalbuminuria (UACR >30 mg/g) and interrogated the 250 kb flanking region around 24 SNPs previously identified in European Ancestry renal GWAS analyses. Findings were replicated in up to 4,358 African Americans. To assess function, individually identified genes were knocked down in zebrafish embryos by morpholino antisense oligonucleotides. Expression of kidney-specific genes was assessed by in situ hybridization, and glomerular filtration was evaluated by dextran clearance. Overall, 23 of 24 previously identified SNPs had direction-consistent associations with eGFR in African Americans, 2 of which achieved nominal significance (UMOD, PIP5K1B). Interrogation of the flanking regions uncovered 24 new index SNPs in African Americans, 12 of which were replicated (UMOD, ANXA9, GCKR, TFDP2, DAB2, VEGFA, ATXN2, GATM, SLC22A2, TMEM60, SLC6A13, and BCAS3). In addition, we identified 3 suggestive loci at DOK6 (p-value = 5.3×10 -7) and FNDC1 (p-value = 3.0×10 -7) for UACR, and KCNQ1 with eGFR (p = 3.6×10 -6). Morpholino knockdown of kcnq1 in the zebrafish resulted in abnormal kidney development and filtration capacity. We identified several SNPs in association with eGFR in African Ancestry individuals, as well as 3 suggestive loci for UACR and eGFR. Functional genetic studies support a role for kcnq1 in glomerular development in zebrafish.
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U2 - 10.1371/journal.pgen.1002264
DO - 10.1371/journal.pgen.1002264
M3 - Article
C2 - 21931561
AN - SCOPUS:80053483147
SN - 1553-7390
VL - 7
JO - PLoS genetics
JF - PLoS genetics
IS - 9
M1 - e1002264
ER -