کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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2957396 | 1578089 | 2008 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Involvement of receptor-bound prorenin in development of nephropathy in diabetic db/db mice Involvement of receptor-bound prorenin in development of nephropathy in diabetic db/db mice](/preview/png/2957396.png)
Previous studies have demonstrated that prorenin plays a significant role in the development and progression of nephropathy in streptozotocin-induced diabetic animals, a model for type 1 diabetes, through a (pro)renin receptor–dependent mechanism. However, whether this novel mechanism also contributes to the mechanism of diabetic nephropathy in type 2 diabetes has remained undetermined. In 16-week-old db/db mice, a model for type 2 diabetes, we found a significant degree of glomerulosclerosis, enhanced immunostaining for the active site of renin (representing non-proteolytically activated prorenin), and an increased immunoreactivity to activated extracellular-signal–related protein kinase 1/2 in the kidneys. These changes were blocked by the chronic subcutaneous administration (1 mg/kg/day) of a decoy peptide with the “handle region” structure, which competitively inhibits prorenin binding to a “handle region”–specific binding protein, such as the (pro)renin receptor. The kidneys of db/db mice also contained increased angiotensin (Ang) I and II levels, eliciting significant microalbuminuria. Treatment with the “handle region” peptide significantly decreased the renal content of Ang I and II and inhibited the development of microalbuminuria. Thus prorenin also contributes to the development of nephropathy in type II diabetes, probably through a (pro)renin receptor–dependent mechanism.
Journal: Journal of the American Society of Hypertension - Volume 2, Issue 5, September–October 2008, Pages 332–340