References
Query Results -- Details
MGI Accession ID: MGI:3849378
J Number: J:149926
Other Accession IDs:
Title: Lack of A1 adenosine receptors augments diabetic hyperfiltration and glomerular injury.
Authors: Faulhaber-Walter R; Chen L; Oppermann M; Kim SM; Huang Y; Hiramatsu N; Mizel D; Kajiyama H; Zerfas P; Briggs JP; Kopp JB; Schnermann J
Journal: J Am Soc Nephrol
Volume: 19
Issue: 4
Date: 2008 Apr
Year: 2008
Pages: 722-30
Review Status: Peer Reviewed
Abstract:
Intraglomerular hypertension and glomerular hyperfiltration likely contribute to the pathogenesis of diabetic nephropathy, and tubuloglomerular feedback (TGF) has been suggested to play a role in diabetic hyperfiltration. A1 adenosine receptor (A1AR) null mice lack a TGF response, so this model was used to investigate the contribution of TGF to hyperfiltration in diabetic Ins2(+/-) Akita mice. TGF responses in Ins2(+/-) A1AR(-/-) double mutants were abolished, whereas they were attenuated in Ins2(+/-) mice. GFR, assessed at 14, 24, and 33 wk, was approximately 30% higher in Ins2(+/-) than in wild-type (WT) mice and increased further in Ins2(+/-) A1AR(-/-) mutants (P < 0.01 versus both WT and Ins2(+/-) mice at all ages). Histologic evidence of glomerular injury and urinary albumin excretion were more pronounced in double-mutant than single-mutant or WT mice. In summary, the marked elevation of GFR in diabetic mice that lack a TGF response indicates that TGF is not required to cause hyperfiltration in the Akita model of diabetes. Rather, an A1AR-dependent mechanism, possibly TGF, limits the degree of diabetic hyperfiltration and nephropathy.
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