Muscarinic receptor density in the rat urinary bladder after denervation, hypertrophy and urinary diversion

L Nilvebrant, J Ekstrom, Lars Malmberg

Research output: Contribution to journalArticlepeer-review

Abstract

Parasympathetic denervation of the urinary bladder results in supersensitivity to muscarinic agonists and in bladder hypertrophy. In the present study, the effects of denervation on the muscarinic receptors in the rat bladder were investigated, using a receptor binding technique with (-)3H-QNB as radioligand. The density of muscarinic receptors was increased in denervated, hypertrophied bladders but it was decreased, below that in control bladders, when the development of hypertrophy was prevented by urinary diversion. A decreased receptor density was also found in innervated bladders after urinary diversion, whereas the receptor density was unaffected by hypertrophy alone. Competition experiments with methacholine revealed no changes in the agonist binding properties of the receptors. When the present data are combined with those in previous functional studies, it seems unlikely that the muscarinic receptors in the bladder are involved in the development of supersensitivity. It is suggested that the density of muscarinic receptors in the bladder may be related to the bladder function.
Original languageEnglish
Pages (from-to)306-314
JournalActa Pharmacologica et Toxicologica
Volume59
Issue number4
Publication statusPublished - 1986

Subject classification (UKÄ)

  • Urology and Nephrology

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