Abidullah, Shujaat Ahmad, Niaz Ali, Feras Almarshad, Muhammad Nabi, Shafiq-ur Rahman, Shakir Ullah, Jahangir Khan, Haya Hussain, Syeda Hajira Bukhari.
Moxifloxacin and gemifloxacin mediates its antispasmodic profile via ATP-sensitive potassium channels: an in-vitro bioassay study..
Pak J Pharm Sci Jan ;34(5):1983-8.

Moxifloxacin and gemifloxacin were tested on isolated rabbits' jejunal preparations as little is known about its effects on gastrointestinal tissues. Moxifloxacin and gemifloxacin were tested in concentrations 0.01-10μg/mL for possible effect(s) on isolated rabbits' jejunal preparations. The drugs were applied on spontaneous, on low K (20mM)-induced contractions and on high K (80mM)-induced contractions. Response was plotted as % of its respective controls. EC50 for Moxifloxacin and Gemifloxacin on spontaneous (without Glibenclamide) contractions are 2.83±0.5μg/mL and 1.11±0.2μg/mL, respectively. Moxifloxacin and Gemifloxacin relaxed the low K+ (20mM) -induced contractions, which were inhibited in presence of Glibenclamide (3μM). Our result indicates that the relaxant activity of Moxifloxacin and Gemifloxacin is mediated possibly through activation of ATP-sensitive potassium channels (KATP). The relaxant effect of Moxifloxacin and Gemifloxacin is predominantly mediated by activation of ATP-Sensitive potassium channels (K), which could be cause of one of relaxing mechanisms.

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