Effects of ritobegron (KUC-7483), a novel β3-adrenoceptor agonist, on both rat bladder function following partial bladder outlet obstruction and on rat salivary secretion: a comparison with the effects of tolterodine
| Autor: | Itaru Maruyama, Hiroshi Kusama, Yuji Hoyano, Kazuyasu Maruyama, Satoshi Tatemichi, Saori Yonekubo, Yoshinobu Yamazaki |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Male
Agonist medicine.medical_specialty Time Factors p-Hydroxyamphetamine Carbachol Tolterodine Tartrate Physiology medicine.drug_class media_common.quotation_subject Phenylpropanolamine Urinary Bladder Urology Adrenergic beta-3 Receptor Agonists Muscarinic Antagonists Acetates urologic and male genital diseases Urination Rats Sprague-Dawley Cresols Bladder outlet obstruction medicine Animals Benzhydryl Compounds Saliva media_common business.industry General Medicine medicine.disease Rats Urinary Bladder Neck Obstruction Ritobegron Overactive bladder Female Tolterodine business medicine.drug |
| Zdroj: | Journal of Smooth Muscle Research. 48:115-124 |
| ISSN: | 1884-8796 0916-8737 |
| DOI: | 10.1540/jsmr.48.115 |
| Popis: | The objective of this study was to investigate the effects of the β3-adrenoceptor (AR) agonist ritobegron on rat bladder function following partial bladder outlet obstruction and on rat salivary secretion. In addition, the effects of ritobegron were compared with those of the anti-muscarinic agent tolterodine. After a 6-week partial bladder outlet obstruction (BOO), drug effects on bladder functions were evaluated using cystometrography. Effects on carbachol (CCh)-induced salivary secretion were evaluated in urethane-anesthetized rats. Ritobegron significantly decreased the frequency of non-voiding contractions (NVC), while both ritobegron and tolterodine each significantly decreased the amplitude of NVC. Ritobegron had no effect on either the micturition pressure (MP) or the residual volume (RV). In contrast, tolterodine dose-dependently decreased MP and increased RV. Ritobegron had no effect on CCh-induced salivary secretion, whereas tolterodine dose-dependently decreased it. Ritobegron decreased both the frequency and amplitude of NVC, which is similar to its effect on the contractions associated with detrusor overactivity (DO) in patients with an overactive bladder (OAB), without affecting MP, RV, or CCh-induced salivary secretion. Although tolterodine reduced the amplitude of NVC, it also markedly increased RV and significantly inhibited CCh-induced salivary secretion. These results suggest that use of ritobegron, a β3-AR agonist, is unlikely to lead to the residual urine and dry mouth symptoms that are associated with anti-muscarinic drugs, and that ritobegron may hold promise as a safe and effective agent for OAB treatment. |
| Databáze: | OpenAIRE |
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