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OVE26 (OVE) diabetic mice on the inbred strain FVB are a valuable model of diabetic nephropathy that excretes the highest amount of urine albumin of all diabetic mouse models. Crossing of OVE mice to C57BL6 or DBA2 mice reduced albuminuria 17-fold in F1 diabetic offspring without reducing diabetes. When comparing renal histology of OVE mice on the FVB background to F1 C57BL6 crosses, we found that the F1 kidneys had significantly smaller glomeruli, much less albumin accumulation in tubules, reduced mesangial matrix expansion, and less interstitial fibrosis. A genome scan of 108 OVE-positive N2 offspring for albuminuria revealed one significant peak on chromosome 11 and nearly significant peaks on chromosomes 9, 13, and 19. Homozygosity for the FVB genotype for peaks on chromosomes 11, 13, or 19 increased albuminuria. Homozygosity for the chromosome 9 peak reduced albuminuria. Combined homozyogosity for the peaks on chromosomes 11, 13, and 19 increased albuminuria over 12-fold and accounted for &gt;70% of the difference between OVE mice on the FVB vs. the F1 background. These loci contain sequences important to susceptibility to diabetic albuminuria.

FVB mouse genotype confers susceptibility to OVE26 diabetic albuminuria