Pharmacological evaluation of 3-carbomethoxy fentanyl in mice

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Abstract

In many animal species, as well as in humans, high doses of fentanyl (F) produce marked neurotoxic effects, such as muscular rigidity and respiratory depression. The antinociception (hot-plate test), impairment of motor coordination (rotarod test) and acute toxicity of intraperitoneal newly synthesized analogs, (±)cis-3-carbomethoxy- fentanyl (C) and (±)trans-3-carbomethoxyfentanyl (T) were evaluated in mice. The compounds tested induced antinociception, impairment of performance on the rotarod, and lethality in a dosedependent manner. The relative order of antinociceptive potency was similar to motor impairment potency, as well as lethality: F > C > T. Naloxone hydrochloride (1 mg/kg; sc) abolished all the effects observed, suggesting that they are mediated via opioid receptors, most probably of μ type. There were no significant differences between the therapeutic indices of F, C and T. It is concluded, the introduction of 3-carbomethoxy group in the piperidine ring of the fentanyl skeleton reduced the potency, but did not affect tolerability and safety of the compound. © 2011 by the authors.

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Vuckovic, S., Prostran, M., Ivanovic, M., Dosen-Micovic, L., Savic Vujovic, K., Vucetic, C., … Mikovic, Z. (2011). Pharmacological evaluation of 3-carbomethoxy fentanyl in mice. Pharmaceuticals, 4(2), 233–243. https://doi.org/10.3390/ph4020233

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