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2017 ; 7
(ä): 44492
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Carnosine Attenuates the Development of both Type 2 Diabetes and Diabetic
Nephropathy in BTBR ob/ob Mice
#MMPMID28281693
Albrecht T
; Schilperoort M
; Zhang S
; Braun JD
; Qiu J
; Rodriguez A
; Pastene DO
; Krämer BK
; Köppel H
; Baelde H
; de Heer E
; Anna Altomare A
; Regazzoni L
; Denisi A
; Aldini G
; van den Born J
; Yard BA
; Hauske SJ
Sci Rep
2017[Mar]; 7
(ä): 44492
PMID28281693
show ga
We previously demonstrated that polymorphisms in the carnosinase-1 gene (CNDP1)
determine the risk of nephropathy in type 2 diabetic patients. Carnosine, the
substrate of the enzyme encoded by this gene, is considered renoprotective and
could possibly be used to treat diabetic nephropathy (DN). In this study, we
examined the effect of carnosine treatment in vivo in BTBR (Black and Tan,
BRachyuric) ob/ob mice, a type 2 diabetes model which develops a phenotype that
closely resembles advanced human DN. Treatment of BTBR ob/ob mice with 4?mM
carnosine for 18 weeks reduced plasma glucose and HbA1c, concomitant with
elevated insulin and C-peptide levels. Also, albuminuria and kidney weights were
reduced in carnosine-treated mice, which showed less glomerular hypertrophy due
to a decrease in the surface area of Bowman's capsule and space. Carnosine
treatment restored the glomerular ultrastructure without affecting podocyte
number, resulted in a modified molecular composition of the expanded mesangial
matrix and led to the formation of carnosine-acrolein adducts. Our results
demonstrate that treatment with carnosine improves glucose metabolism,
albuminuria and pathology in BTBR ob/ob mice. Hence, carnosine could be a novel
therapeutic strategy to treat patients with DN and/or be used to prevent DN in
patients with diabetes.