Inhibiting MicroRNA-503 and MicroRNA-181d with Losartan Ameliorates Diabetic Nephropathy in KKAy Mice.

Abstract

BACKGROUND Diabetic nephropathy (DN) is the most lethal diabetic microvascular complication; it is a major cause of renal failure, and an increasingly globally prominent healthcare problem. MATERIAL AND METHODS To identify susceptible microRNAs for the pathogenesis of DN and the targets of losartan treatment, microRNA arrays were employed to survey the glomerular microRNA expression profiles of KKAy mice treated with or without losartan. KKAy mice were assigned to either a losartan-treated group or a non-treatment group, with C57BL/6 mice used as a normal control. Twelve weeks after treatment, glomeruli from the mice were isolated. MicroRNA expression profiles were analyzed using microRNA arrays. Real-time PCR was used to confirm the results. RESULTS Losartan treatment improved albuminuria and the pathological lesions of KKAy mice. The expression of 10 microRNAs was higher, and the expression of 12 microRNAs was lower in the glomeruli of the KKAy untreated mice than that of the CL57BL/6 mice. The expression of 4 microRNAs was down-regulated in the glomeruli of the KKAy losartan-treated mice compared to that of the untreated mice. The expression of miRNA-503 and miRNA-181d was apparently higher in the glomeruli of the KKAy untreated mice, and was inhibited by losartan treatment. CONCLUSIONS The over-expression of miR-503 and miR-181d in glomeruli of KKAy mice may be responsible for the pathogenesis of DN and are potential therapeutic targets for DN.

• Authors: XinWang Zhu, CongXiao Zhang, QiuLing Fan, XiaoDan Liu, Gang Yang, Yi Jiang, LiNing Wang
• Journal: Medical science monitor : international medical journal of experimental and clinical research (Med Sci Monit) Vol. 22 Pg. 3902-3909 (Oct 22 2016) ISSN: 1643-3750 [Electronic] United States
• PMID: 27770539 (Publication Type: Journal Article)

Chemical References

• MicroRNAs
• Mirn503 microRNA, mouse
• mirn181 microRNA, mouse
• Losartan

Topics

• Animals
• Diabetes Mellitus, Experimental (drug therapy, genetics, metabolism)
• Diabetes Mellitus, Type 2 (drug therapy, genetics, metabolism)
• Diabetic Nephropathies (drug therapy, genetics, metabolism)
• Kidney Glomerulus (metabolism)
• Losartan (pharmacology)
• Male
• Mice
• Mice, Inbred Strains
• MicroRNAs (antagonists & inhibitors, biosynthesis, genetics)