Oxotremorine M iodide is a potent and non-selective muscarinic acetylcholine receptor (mAChR) agonist. Oxotremorine M iodide potentiates NMDA receptors by muscarinic receptor dependent and independent mechanisms.In Vitro: Oxotremorine M iodide (0.1, 0.3, 1, 3, 10, 30 μM) inhibits KCNQ2/3 currents in the concentration-dependence[2].
Oxotremorine M iodide elicits a robust phosphoinositide response characterized with an EC50 of 0.22 μM. Oxotremorine M iodide has EC50s of 0.36, 0.52, 1.62, and 1.48 μM for wild-type, M2, M3, and M2/M3 knockout mice, respectively.
In Vivo: Oxotremorine M iodide (0.5 mg/kg; s.c.) increases Ddopamine (DA) release in the medial prefrontal cortex (mPFC) and has no effect in the nucleus accumbens (NAC) in male sprague-dawley albino rats weighing 250-350 g.