; Gandin, Ilaria ; Girotto, Giorgia
; Glaudemans, Bob ; Hastie, Nicholas D. ; Loffing, Johannes ; Polasek, Ozren
; Rampoldi, Luca
; Rudan, Igor
; Sala, Cinzia ; Traglia, Michela ; Vollenweider, Peter ; Vuckovic, Dragana
; Youhanna, Sonia ; Weber, Julien ; Wright, Alan F. ; Kutalik, Zoltán ; Bochud, Murielle
; Fox, Caroline S. ; Devuyst, Olivier | Item type: | Article | ||||
|---|---|---|---|---|---|
| Journal or Publication Title: | Journal of the American Society of Nephrology | ||||
| Publisher: | AMER SOC NEPHROLOGY | ||||
| Place of Publication: | WASHINGTON | ||||
| Volume: | 25 | ||||
| Number of Issue or Book Chapter: | 8 | ||||
| Page Range: | pp. 1869-1882 | ||||
| Date: | 2014 | ||||
| Institutions: | Medicine > Institut für Epidemiologie und Präventivmedizin | ||||
| Identification Number: |
| ||||
| Keywords: | CHRONIC KIDNEY-DISEASE; TAMM-HORSFALL PROTEIN; GENOME-WIDE ASSOCIATION; RISK-FACTORS; CARDIOVASCULAR MORTALITY; BLOOD-PRESSURE; INCIDENT CKD; GENE; POPULATION; NEPHROPATHY; | ||||
| Dewey Decimal Classification: | 600 Technology > 610 Medical sciences Medicine | ||||
| Status: | Published | ||||
| Refereed: | Yes, this version has been refereed | ||||
| Created at the University of Regensburg: | Yes | ||||
| Item ID: | 61298 |
Abstract
Uromodulin is expressed exclusively in the thick ascending limb and is the most abundant protein excreted in normal urine. Variants in UMOD, which encodes uromodulin, are associated with renal function, and urinary uromodulin levels may be a biomarker for kidney disease. However, the genetic factors regulating uromodulin excretion are unknown. We conducted a meta-analysis of urinary uromodulin ...

Abstract
Uromodulin is expressed exclusively in the thick ascending limb and is the most abundant protein excreted in normal urine. Variants in UMOD, which encodes uromodulin, are associated with renal function, and urinary uromodulin levels may be a biomarker for kidney disease. However, the genetic factors regulating uromodulin excretion are unknown. We conducted a meta-analysis of urinary uromodulin levels to identify associated common genetic variants in the general population. We included 10,884 individuals of European descent from three genetic isolates and three urban cohorts. Each study measured uromodulin indexed to creatinine and conducted linear regression analysis of approximately 2.5 million single nucleotide polymorphisms using an additive model. We also tested whether variants in genes expressed in the thick ascending limb associate with uromodulin levels. rs12917707, located near UMOD and previously associated with renal function and CKD, had the strongest association with urinary uromodulin levels (P<0.001). In all cohorts, carriers of a G allele of this variant had higher uromodulin levels than noncarriers did (geometric means 10.24, 14.05, and 17.67 mu g/g creatinine for zero, one, or two copies of the G allele). rs12446492 in the adjacent gene PDILT (protein disulfide isomerase-like, testis expressed) also reached genome-wide significance (P<0.001). Regarding genes expressed in the thick ascending limb, variants in KCNJ1, SORL1, and CAB39 associated with urinary uromodulin levels. These data indicate that common variants in the UMOD promoter region may influence urinary uromodulin levels. They also provide insights into uromodulin biology and the association of UMOD variants with renal function.
Metadata last modified: 19 Dec 2024 08:08
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