Actions of two main metabolites of propiverine (M-1 and M-2) on voltage-dependent L-type Ca2+ currents and Ca2+ transients in murine urinary bladder myocytes.

ABSTRACT: The anticholinergic propiverine (1-methyl-4-piperidyl diphenylpropoxyacetate), which is used for the treatment of overactive bladder syndrome, has functionally active metabolites [M-1 (1-methyl-4-piperidyl diphenylpropoxyacetate N-oxide) and M-2 (1-methyl-4-piperidyl benzilate N-oxide)], but the site of actions of these metabolites is uncertain. Propiverine is rapidly absorbed after oral administration and is extensively biotransformed in the liver, giving rise to several active metabolites (M-1 and M-2). This study determines the effect of M-1 and M-2 on voltage-dependent nifedipine-sensitive inward Ca(2+) currents (I(Ca)) using patch-clamp techniques and fluorescent Ca(2+) imaging [after electrical field stimulation (EFS) and acetylcholine (ACh)] in the murine urinary bladder. In convent

SUBMITTER: Zhu HL 

PROVIDER: S-EPMC2543115 | biostudies-literature | 2008 Jan

REPOSITORIES: biostudies-literature