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Vol. 104, No. 2, 2006
Issue release date: September 2006
Section title: Original Paper
Nephron Exp Nephrol 2006;104:e63–e75
(DOI:10.1159/000093999)

Leucine-Rich Repeat-Containing G Protein-Coupled Receptor-4 (LGR4, Gpr48) Is Essential for Renal Development in Mice

Kato S. · Matsubara M. · Matsuo T. · Mohri Y. · Kazama I. · Hatano R. · Umezawa A. · Nishimori K.
aLaboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University, Sendai, bDivision of Molecular Medicine, Center for Translational and Advanced Animal Research, Tohoku University School of Medicine, Sendai, and cNational Research Institute for Child Health and Development, Tokyo, Japan

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 2/7/2006
Accepted: 3/30/2006
Published online: 6/21/2006

Number of Print Pages: 1
Number of Figures: 8
Number of Tables: 3

ISSN: (Print)
eISSN: 1660-2129 (Online)

For additional information: http://www.karger.com/NEE

Abstract

Leucine-rich repeat-containing G protein-coupled receptor (LGR)-4 is a G protein-coupled receptor (GPCR) with a seven-transmembrane domain structure. LGRs are evolutionally and structurally phylogenetic, classified into three subgroups and are members of the so-called orphan receptors whose ligands have yet to be identified. We generated knockout mice lacking Lgr4(Gpr48) by targeted deletion of part of exon 18, which codes for the transmembrane and signal-transducing domains of the receptor. Lgr4 null mice were born at much less than the 25% expected frequency from crosses of Lgr4 heterozygous mice (Lgr4+/–). Lgr4 null mice that survived in utero died shortly after birth in almost all cases. We observed striking renal hypoplasia in the null mice, accompanied by elevated concentration of plasma creatinine. Histological analysis of the P0 null mouse kidney showed a notable decrease in the total number and density of the glomerulus. Thus, the function of Lgr4 is essential to regulate renal development in the mouse. This study suggests that the Lgr4 gene is a new and important member of LGRs involved in a group of genes responsible for hereditary disease in the kidney.


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 2/7/2006
Accepted: 3/30/2006
Published online: 6/21/2006

Number of Print Pages: 1
Number of Figures: 8
Number of Tables: 3

ISSN: (Print)
eISSN: 1660-2129 (Online)

For additional information: http://www.karger.com/NEE


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