Krebs solution was obtained from Sigma Aldrich (St. Louis, MO, USA). Silodosin (Recordati, Milan, Italy), tamsulosin (Cayman, Ann Arbor, MI, USA), and naftopidil (Cayman) were procured and used. Silodosin and tamsulosin were dissolved in ethanol and naftopidil in methanol (Merck, Kenilworth, NJ, USA) and stored as stock solutions: Silodosin (1 mM), tamsulosin (400 nM), and naftopidil (200 µM) [15 (link)16 17 ].
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