Ibogaine-Mediated ROS/Antioxidant Elevation in Isolated Rat Uterus Is β-Adrenergic Receptors and KATP Channels Mediated.
Antioxidants (Basel, Switzerland) November 9, 2021 Nikola Tatalović, Teodora Vidonja Uzelac, Zorana Oreščanin Dušić et al. 5 citations
A single dose of ibogaine (28.8 μmol/L) applied to isolated rat uterus altered contractility and antioxidant enzyme activity over four hours. In spontaneously contracting uteri, ibogaine immediately increased contraction amplitude and frequency, effects blocked by propranolol (β-adrenoceptor antagonist) and glibenclamide (KATP channel inhibitor, for frequency only). In calcium-stimulated uteri, ibogaine decreased amplitude and frequency after four hours; propranolol prevented the amplitude reduction, but glibenclamide had no effect. Ibogaine reduced superoxide dismutase 1 (SOD1) activity and increased catalase (CAT) activity after two hours in both uterus types, and in calcium-stimulated uteri also reduced SOD2 activity. After four hours, SOD1 returned to baseline while glutathione peroxidase (GSH-Px) activity rose. Pre-treatment with propranolol or glibenclamide abolished these enzyme changes, indicating ibogaine's pro-antioxidant effects are mediated by β-adrenergic receptors and KATP channels.