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Jorma Kärkkäinen

3 papers in the library · 108 citations · publishing 1995-2005

Papers

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Potentially hallucinogenic 5-hydroxytryptamine receptor ligands bufotenine and dimethyltryptamine in blood and tissues.

Scandinavian Journal of Clinical and Laboratory Investigation 2005 J Kärkkäinen, T Forsström, J Tornaeus et al. 50 citations

Bufotenine and N,N-dimethyltryptamine (DMT) are hallucinogenic dimethylated indolethylamines (DMIAs) formed from serotonin and tryptamine by the enzyme indolethylamine N-methyltransferase (INMT) ubiquitously present in non-neural tissues. In mammals, endogenous bufotenine and DMT have been identified only in human urine. The DMIAs bind effectively to 5HT receptors and their administration...

Determination of potentially hallucinogenic N-dimethylated indoleamines in human urine by HPLC/ESI-MS-MS.

Scandinavian Journal of Clinical and Laboratory Investigation 2001 T Forsström, J Tuominen, J Kärkkäinen 41 citations

A new method for the determination of N,N-dimethyl-5-hydroxytryptamine (bufotenine), N,N-dimethyltryptamine (DMT)*, 5-methoxy-N,N-dimethyltryptamine (5-MeODMT), and N-methyltryptamine (NMT) was developed using high-performance liquid chromatography-mass spectrometry (HPLC-MS). Identification of the analytes is based on liquid chromatographic retention times of analytes and two fragment ions...

Urinary excretion of bufotenin (N,N-dimethyl-5-hydroxytryptamine) is increased in suspicious violent offenders: a confirmatory study.

Psychiatry Research September 29, 1995 J Kärkkäinen, M Räisänen, M O Huttunen et al. 17 citations

We previously reported that violent offenders with paranoid symptoms or whose violent actions had been directed against family members had higher urinary levels of bufotenin than other violent offenders. In the present study, patients were evaluated with the Karolinska Scales of Personality (KSP), and urinary levels of bufotenin were determined by mass spectrometry. In drug-free patients...