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Michal Kohout

Department of Organic Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague, Czech Republic.

2 papers in the library · 14 citations · publishing 2022-2025

Papers

Pharmacokinetic, pharmacodynamic, and behavioural studies of deschloroketamine in Wistar rats.

British journal of pharmacology January 1, 2022 Kristýna Štefková-mazochová, Hynek Danda, Wim Dehaen et al. 13 citations

Deschloroketamine (DCK), a structural analogue of ketamine sold as a recreational drug, was tested in Wistar rats to examine its pharmacokinetics, acute effects, and addictive potential. DCK rapidly entered the brain, with peak levels at 30 minutes and sustained high levels for 2 hours. It blocks NMDA receptors similarly to ketamine, with the S-enantiomer more potent. DCK stimulated locomotion, induced place preference (a sign of reward), and strongly disrupted prepulse inhibition (PPI). Locomotor stimulation faded faster than PPI disruption. S-DCK had stronger stimulatory effects than R-DCK, but both equally disrupted PPI. DCK's behavioral and addictive profiles resemble ketamine's, with a slightly slower clearance, matching its reported longer duration. These findings clarify risks of illicit DCK use.

Achiral LC-MS/MS and chiral SFC-MS methods for quantification of methoxphenidine and O-desmethyl-methoxphenidine metabolite in rat serum and brain.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences June 1, 2025 Natalie Paškanová, Magdaléna Vágnerová, Bronislav Jurásek et al. 1 citation

Methoxphenidine (MXP), a dissociative anaesthetic derivative, is increasingly abused, but forensic and clinical data on its metabolism and enantiomers are limited. Researchers developed and validated achiral LC-MS/MS and chiral SFC-MS methods to quantify MXP and its primary metabolite, O-desmethyl-methoxphenidine (dmMXP), in rat serum and brain after a single subcutaneous dose of racemic MXP. Serum MXP peaked at 1600 ng/mL at 0.5 hours and decreased to 5.87 ng/mL at 24 hours; brain MXP peaked at 13200 ng/g at 0.5 hours and fell to 36.1 ng/g at 24 hours. (S)-MXP concentrations in brain appeared higher than (R)-enantiomer concentrations. The methods enable pharmacokinetic studies and provide tools for forensic and clinical toxicology.