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Genetic characerization of early renal changes in diabetes

ABSTRACT: Diabetic kidney disease (DKD) appears heritable, suggesting genetic factors influence disease susceptibility. In our study, genes were mapped mediating early renal hypertrophic in response to diabetes. A survey of murine strains (N=15) was conducted to identify variation in kidney hypertrophy following diabetes induction. Mice with greater FVB/N and less C57BL/6 renal hypertrophy were crossed and diabetic F2 generation mice (n=534) were characterised. To confirm loci responsible for the renal hypertrophic response, diabetic congenic mice were generated by backcrossing FVB/N mice that conferred greater or C57BL/6 conferring lower risk into the reciprocal strain mice. Kidney weights of (FVB/N x C57BL/6) F2 diabetic mice were broadly distributed. Quantitative trait locus (QTL) analysis revealed that diabetic mice with kidney weights in the upper quartile shared alleles on chromosomes 6 and 12, with the FVB/N allele on chromosome 6 conferring greater susceptibility. On chromosome 12, C57BL/6 homozygotes were more significantly represented (LOD=3.8) conferring less susceptibility. The diabetic B6.Drc1/2f congenic strain developed kidney damage, while the reciprocal congenic, with FVB.Drc1/2b strain were protected. Microarray analysis identified differentially expressed genes between diabetic C57BL/6 and FVB/N mice. QTL mapping for early renal responses to diabetes identified two loci syntenic with regions identified for human diabetic kidney disease. Providing a new resource to study DKD.

ORGANISM(S): Mus musculus

PROVIDER: GSE123677 | GEO | 2021/12/31

REPOSITORIES: GEO

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