@article {3506,
	title = {Common variants in UMOD associate with urinary uromodulin levels: a meta-analysis.},
	journal = {J Am Soc Nephrol},
	volume = {25},
	year = {2014},
	month = {2014 Aug},
	pages = {1869-82},
	abstract = {<p>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 μg/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.</p>},
	keywords = {Creatinine, European Continental Ancestry Group, Genetic Variation, Humans, Polymorphism, Single Nucleotide, Uromodulin},
	issn = {1533-3450},
	doi = {10.1681/ASN.2013070781},
	author = {Olden, Matthias and Corre, Tanguy and Hayward, Caroline and Toniolo, Daniela and Ulivi, Sheila and Gasparini, Paolo and Pistis, Giorgio and Hwang, Shih-Jen and Bergmann, Sven and Campbell, Harry and Cocca, Massimiliano and Gandin, Ilaria and Girotto, Giorgia and Glaudemans, Bob and Hastie, Nicholas D and Loffing, Johannes and Polasek, Ozren and Rampoldi, Luca and Rudan, Igor and Sala, Cinzia and Traglia, Michela and Vollenweider, Peter and Vuckovic, Dragana and Youhanna, Sonia and Weber, Julien and Wright, Alan F and Kutalik, Zolt{\'a}n and Bochud, Murielle and Fox, Caroline S and Devuyst, Olivier}
}
