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Expression of Angiotensin II Type 1 Receptor in Rat Bladder Smooth Muscle Cells in Response to a Streptzotocin
Shohei Tobu1, Mitsuru Noguchi2, Teppei Hatada1
1Division of Nephro-Urology, Department of Translational Medical Sciences Course of Medical and Dental Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
Introduction:
The aim of this study was to investigate angiotensin II type 1 (AT1) receptors in rat bladder smooth muscle cells and alterations of AT1 receptors by diabetes mellitus and diuretic states.
Materials And Methods:
Diabetes and diuresis were induced in adult female rats by a single intraperitoneal injection of streptozotocin and feeding 5% sucrose in water. Cystometry was performed on control, diuretic, and diabetic rats at 2 and 8 weeks after treatment. Immunohistochemical staining was used to detect expression of AT1 receptors in the bladder smooth muscle cell membrane.
Results And Conclusions:
In diabetic rats, expression of AT1 receptors in the bladder smooth muscle cell membrane increased at 2 weeks and further increased at 8 weeks. The local renin-angiotensin system in the rat bladder might be activated by the continuous hyperglycemia caused by intraperitoneal injection of streptozotocin administration.
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