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2018 ; 13
(7
): e0200249
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English Wikipedia
Linagliptin unmasks specific antioxidant pathways protective against albuminuria
and kidney hypertrophy in a mouse model of diabetes
#MMPMID29979777
Spencer NY
; Yang Z
; Sullivan JC
; Klein T
; Stanton RC
PLoS One
2018[]; 13
(7
): e0200249
PMID29979777
show ga
BACKGROUND: Dipeptidyl peptidase-4 (DPP-4) inhibitors may have protective effects
on diabetic kidney disease (DKD) via specific antioxidant pathways. The DPP-4
inhibitor, linagliptin, was evaluated with the hypothesis that DPP-4 inhibition
would ameliorate the development of DKD in a glucose-independent manner by
altering specific antioxidant function. METHODS: DBA/2J mice (a
well-characterized model of DKD) and glucose 6-phosphate dehydrogenase (G6PD)
deficient mice (a model of impaired antioxidant function) were evaluated.
Diabetes was induced by streptozotocin. Mice were divided into: diabetic (DM),
diabetic+linagliptin (DM+Lina), and non-diabetic control and treated for 12
weeks. RESULTS: In DBA/2J mice, there was no difference in body weight and blood
glucose between DM and DM+Lina groups. Linagliptin ameliorated albuminuria and
kidney hypertrophy in DM DBA/2J mice and specifically increased the mRNA and
protein levels for the antioxidants catalase and MnSOD. In G6PD deficient mice,
however, increases in these mRNA levels did not occur and linagliptin
renoprotection was not observed. Linagliptin also ameliorated histological trends
toward mesangial expansion in wild-type mice but not in G6PD deficient mice.
CONCLUSIONS: Linagliptin renoprotection involved glucose-independent but
antioxidant-enzyme-system-dependent increases in transcription (not just
increased protein levels) of antioxidant proteins in wild-type mice. These
studies demonstrate that an intact antioxidant system, in particular including
transcription of catalase and MnSOD, is required for the renoprotective effects
of linagliptin.
|Albuminuria/metabolism/pathology/*prevention & control
[MESH]