RGD Reference Report - Chromosomes 18 and X are quantitative trait loci for nephrotic-range proteinuria in rats. - Rat Genome Database

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Chromosomes 18 and X are quantitative trait loci for nephrotic-range proteinuria in rats.

Authors: Schachter, AD  Ichimura, T  Kohane, IS 
Citation: Schachter AD, etal., Pediatr Nephrol 2005 Aug 16;.
RGD ID: 1553894
Pubmed: PMID:16133046   (View Abstract at PubMed)
PMCID: PMC1343534   (View Article at PubMed Central)
DOI: DOI:10.1007/s00467-005-2020-8   (Journal Full-text)

Numerous cellular and molecular perturbations have been studied to elucidate the pathogenic mechanisms underlying nephrotic-range proteinuria, which may in turn shed light on disease-specific mechanisms. We have analyzed the publicly available data from the PhysGen partial panel of consomic rats to determine whether there are quantitative trait loci that associate with nephrotic-range proteinuria. As of this writing, consomic rat strains subjected to the renal protocol have been bred by the Program for Genomic Applications for 15 of the 22 rat chromosomes for both genders, predominantly with the Brown-Norway (BN) and Dahl salt-sensitive (SS) strains as parents. We defined chromosomes of interest as consomic SS-xBN strains whose phenotype measurements differed significantly from SS but not BN strains, stratified by gender. We filtered and clustered differentially expressed genes by function in renal tissue from relevant strains. Proteinuria was significantly higher in male SS vs. male SS-18BN, and it was significantly higher in male SS vs. female SS. Functional clustering of differentially expressed genes yielded two specific functional clusters: apoptosis (p=0.022) and angiogenesis (p=0.046). Gene expression profiles demonstrated differential expression of apoptotic and angiogenic genes. However, TUNEL stains of renal tissue showed no significant difference in the number of apoptotic nuclei. We conclude that chromosomes 18 and X are quantitative trait loci for nephrotic-range proteinuria in rats.

Objects referenced in this article
Strain SS-Chr 18BN/Mcwi null Rattus norvegicus

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