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2017 ; 5
(5
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
The effects of dual PPAR?/? agonism compared with ACE inhibition in the BTBRob/ob
mouse model of diabetes and diabetic nephropathy
#MMPMID28292877
Ericsson A
; Tonelius P
; Lal M
; Sabirsh A
; Böttcher G
; William-Olsson L
; Strömstedt M
; Johansson C
; Hyberg G
; Tapani S
; Jönsson-Rylander AC
; Unwin R
Physiol Rep
2017[Mar]; 5
(5
): ä PMID28292877
show ga
The leptin-deficient BTBRob/ob mouse develops progressive albuminuria and
morphological lesions similar to human diabetic nephropathy (DN), although
whether glomerular hyperfiltration, a recognized feature of early DN that may
contribute to renal injury, also occurs in this model is not known. Leptin
replacement has been shown to reverse the signs of renal injury in this model,
but in contrast, the expected renoprotection by angiotensin-converting enzyme
(ACE) inhibition in BTBRob/ob mice seems to be limited. Therefore, to investigate
the potential renal benefits of improved metabolic control in this model, we
studied the effect of treatment with the dual peroxisome proliferator-activated
receptor (PPAR) ?/? agonist AZD6610 and compared it with the ACE inhibitor
enalapril. AZD6610 lowered plasma glucose and triglyceride concentrations and
increased liver size, but had no significant effect in reducing albuminuria,
whereas enalapril did have an effect. Nephrin and WT1 mRNA expression decreased
in the kidneys of BTBRob/ob mice, consistent with podocyte injury and loss, but
was unaffected by either drug treatment: at the protein level, both nephrin and
WT1-positive cells per glomerulus were decreased. Mesangial matrix expansion was
reduced in AZD6610-treated mice. GFR, measured by creatinine clearance, was
increased in BTBRob/ob mice, but unaffected by either treatment. Unexpectedly,
enalapril-treated mice showed intrarenal arteriolar vascular remodeling with
concentric thickening of vessel walls. In summary, we found that the BTBRob/ob
mouse model shows some similarities to the early changes seen in human DN, but
that ACE inhibition or PPAR?/? agonism afforded limited or no kidney protection.