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  • Title: Effect of insulin and dietary myoinositol on muscarinic receptor alterations in diabetic rat bladder.
    Author: Latifpour J, Gousse A, Yoshida M, Weiss RM.
    Journal: J Urol; 1992 Mar; 147(3):760-3. PubMed ID: 1538479.
    Abstract:
    Previous studies from our laboratory demonstrated that there is an up-regulation of muscarinic receptor density in the bladder dome of the 8-wks diabetic rat compared to control. To determine whether the changes observed in receptor density can be corrected by insulin or dietary myoinositol, five groups of rats were maintained for eight weeks: control (C), diabetic (D), diabetic insulin-treated (DI), diabetic myoinositol-treated (DMI), and control myoinositol-treated (CMI). Diabetes was induced by i.v. injection of 65 mg./kg. of streptozotocin. D and DMI animals were smaller, had higher serum glucose and lower serum insulin levels, higher water intakes and urine outputs, and larger bladder domes than the other groups. The density of the muscarinic receptors measured by radioligand receptor binding assays using [3H]quinuclidinyl benzilate were (in fmol./mg. protein): C, 88 +/- 13; D, 176 +/- 19; DI, 94 +/- 5; DMI, 158 +/- 8; CMI, 112 +/- 10. These data indicate that insulin, but not myoinositol treatment normalized diabetes induced abnormalities observed in the general features of streptozotocin-injected rats and prevented the diabetic-induced upregulation of bladder dome muscarinic receptors.
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