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  • Title: Juvenile pig detrusor: effects of propiverine and three of its metabolites.
    Author: Wuest M, Braeter M, Schoeberl C, Ravens U.
    Journal: Eur J Pharmacol; 2005 Nov 07; 524(1-3):145-8. PubMed ID: 16256104.
    Abstract:
    In isolated detrusor strips, propiverine is known to be effective to decrease contractions elicited by electric field stimulation (EFS). Here we investigated whether the metabolites M-5, M-6 and M-14 of propiverine retain the pharmacological properties of the parent compound also in juvenile organisms. EFS-induced contractions of detrusor strips from juvenile pigs are more sensitive to atropine than strips from mature pigs. The atropine-resistant component of contraction is also significantly larger in juvenile pigs. Propiverine, its metabolites M-5, M-14 and also tolterodine completely reduced detrusor contraction in juvenile pigs. M-6 almost did not affect atropine-resistant contractions. We conclude that juvenile pig detrusors possess a higher atropine-resistant component of EFS-elicited contraction. Nevertheless order of potency and efficacy of propiverine and its metabolites M-5 and M-14 are similar in juvenile and mature pigs, while M-6 only reduces atropine-sensitive contractions in the juvenile organism.
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