Gas chromatography mass spectrometry assay for ketamine and its metabolites in plasma

A highly sensitive and specific method for quantitation of ketamine and two of its metabolites found in monkey, dog and human plasma was developed using a gas chromatography selected ion monitoring assay operated in both electron impact and chemical ionization modes. This technique yields excellent precision, reproducibility and accuracy. From 1 ng to 3 μg of ketamine or its metabolites in 1 ml of plasma can be detected. The technique of electron capture gas chromatography is compared. All three assays were found to be quite useful but the gas chromatography mass spectrometry techniques were more specific.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/144691/1/bms1200040508.pd

Identification of 2-bromohydroquinone as a metabolite of bromobenzene and obromophenol. Implications for bromobenzene-induced nephrotoxicity.J.

ABSTRACT 2-Bromohydroquinone was identified as a metabolite of both bromobenzene and o-bromophenol in the rat in vivo and in vitro

Accumulation of neurotoxic thioether metabolites of 3,4-(±)-methylenedioxymethamphetamine in rat

ABSTRACT The serotonergic neurotoxicity of 3,4-(Ϯ)-methylenedioxymethamphetamine (MDMA) appears dependent upon systemic metabolism because direct injection of MDMA into the brain fails to reproduce the neurotoxicity. MDMA is demethylenated to the catechol metabolite N-methyl-␣-methyldopamine (N-Me-␣-MeDA). Thioether (glutathione and N-acetylcysteine) metabolites of N-Me-␣-MeDA are neurotoxic and are present in rat brain following s.c. injection of MDMA. Because multidose administration of MDMA is typical of drug intake during rave parties, the present study was designed to determine the effects of multiple doses of MDMA on the concentration of neurotoxic thioether metabolites in rat brain. The serotonergic neurotoxicity 3,4-(Ϯ)-methylenedioxymethamphetamine (MDMA, Ecstasy) and 3,4-(Ϯ)-methylenedioxyamphetamine (MDA) is dependent on the route of administration MDMA is N-demethylated to MDA and O-demethylenated to N-methyl-␣-methyldopamine (N-Me-␣-MeDA

METABOLISM AND TOXICITY OF 2-BROMO-(DIGLUTATHION-SYL)-HYDROQUINONE AND 2-BROMO-3-(GLUTATHION-S-YL)HYDROQUINONE IN THE IN SITU PERFUSED RAT KIDNEY

ABSTRACT: 2-Br-(dlglutathion-S-yI)hydroqulnon

Metabolism as a determinant of species susceptibility to 2,3,5-(triglutathion-S-yl)hydroquinone-mediated nephrotoxicity. The role of N-acetylation and N-deacetylation." Drug Metab Dispos 23(10

ABSTRACT: 2,3,5-(Triglutathion-S-yI)hydroquinone [2,3