Following intraperitoneal administration, 5-methoxy-N,N-dimethyltryptamine and N,N-dimethyltryptamine are subject to both a very rapid uptake into, and clearance from, all tissues examined. The current studies in vivo confirm previous in vitro observations that the routes involved in the metabolism of these compounds include oxidative deamination, N-demethylation, O-demethylation, and N-oxidation. The analysis of metabolic profiles in various tissues led to the identification of the N-oxides as major metabolites...
... /From/ ... urine samples collected from three individuals that were administered ayahuasca ... /authors/ show that the major metabolite of the hallucinogenic component of ayahuasca, N,N-dimethyltryptamine (DMT), is the corresponding N-oxide... Further, very little DMT was detected in urine, despite the inhibition of monoamine oxidase afforded by the presence of the harmala alkaloids in ayahuasca. ...
Behavioral aspects and metabolic fate of N,N-dimethyltryptamine (DMT) were studied in mice pretreated with beta-diethylaminoethyl-diphenylpropylacetate (SKF 525-A), iproniazid or chlorpromazine (CPZ.). ... Dose-dependent increases with rapid uptake and disappearance in the brain, plasma and hepatic levels of DMT were measured with doses of 10 and 25 mg/kg DMT. ... It is concluded that DMT is metabolized chiefly by monoamine oxidase rather than by drug-metabolizing hepatic microsomal enzymes and that DMT-induced behavioral effects are due to the parent compound rather than its metabolite.
Studies were conducted using tritiated DMT and DMT-N-oxide (DMT-NO), and metabolites were identified and quantified using thin-layer chromatography and liquid scintillation counting techniques. Metabolite confirmation was obtained by incubation of alpha,alpha,beta,beta-tetradeutero-DMT (DDMT) with whole brain homogenate followed by combined gas chromatographic/mass spectrometric analyses. The metabolites of DMT were identified as indoleacetic acid (IAA), DMT-NO, N-methyltryptamine (NMT), 2-methyl-1,2,3,4-tetrahydro-beta-carboline (2-MTHBC), tryptamine (TA) and 1,2,3,4- tetrahydro-beta-carboline (THBC). DMT-NO was metabolized to give DMT, NMT, IAA and 2-MTHBC. Formation of these metabolites from DMT-NO was stimulated by anaerobic incubation. ...
... The effects of the monamine oxidase inhibitor iproniazid phosphate on DMT metabolism were also studied. Iproniazid inhibited the formation of IAA from DMT by 83 per cent. However, the formation of NMT and DMT-NO was inhibited by 90 per cent under these conditions. Thus, the reported extension of half-life and potentiation of DMT behavioral effects by iproniazid may be due to inhibition of NMT and DMT-NO formation rather than inhibition of monoamine oxidase. A cyclic pathway for the synthesis and metabolism of DMT in brain tissue is proposed.
N,N-Dimethyltryptamine (DMT), harmine, harmaline and tetrahydroharmine (THH) are the characteristic alkaloids found in Amazonian sacraments known as hoasca, ayahuasca, and yaje. Such beverages are characterized by the presence of these three harmala alkaloids, where harmine and harmaline reversibly inhibit monoamine oxidase A (MAO-A) while tetrahydroharmine weakly inhibits the uptake of serotonin. Together, both actions increase central and peripheral serotonergic activity while facilitating the psychoactivity of DMT. ...
The narcotic antagonist naloxone was tested to determine its possible interaction with N,N-dimethyltryptamine (DMT) ... in adult male Holtzman rats ... increasing doses of DMT (1.0, 3.2, and 10.0 mg/kg) were administered i.p. to disrupt food-rewarded fixed ratio bar pressing in a dose related fashion. Pretreatment (5--10 min) with behaviorally ineffective doses of naloxone (1.0--5.6 mg/kg) dramatically enhanced the effects of DMT ... The content of DMT in the brain and liver of rats injected with DMT alone (10 mg/kg) and with a 5 min pretreatment of naloxone (3.2 mg/kg) was determined by radiochemical analysis at 30 and 90 min after (14)C-DMT injection. There was no significant difference for either brain or liver (14)C-DMT levels when control DMT rats were compared with the naloxone pretreated rats. These results seem to rule out interference by naloxone with the metabolism of DMT as a mechanism of the observed behavioral potentiation.
The effects of various neuroleptics were studied on N, N-dimethyltryptamine (DMT, 3.2 mg/kg) ... induced hyperthermia in the rabbit. Complete dose-effect curves were obtained. The order of potency for antagonism of DMT-induced hyperthermia was: methiothepin greater than octoclothepin greater than or equal to oxyprothepin greater than perathiepin greater than dokloxythepin greater than mianserine greater than loxapine greater than oxypertine greater than chlorpromazine greater than pipamperone greater than fluphenazine greater than thiothixene greater than haloperidol greater than molindone...The results indicate that neuroleptics differ markedly in their specificity of antagonism of DMT ... which may act through different neurotransmitter mechanisms (tryptaminergic vs. adrenergic).
For a patient with a "bad trip" or panic reaction, provide gentle reassurance and relaxation techniques in a quiet environment. Treat agitation or severe anxiety states with diazepam or midazolam. Butyrophenones such as haloperidol are useful despite a small theoretical risk of lowering seizure threshold. Treat seizures, hypothermia, rhabdomyolysis, hypertension, and cardiac arrhythmias if they occur. There is no specific antidote. Sedating doses of diazepam may alleviate anxiety, and hypnotic doses can induce sleep for the duration of the "trip". /Lysergic Acid Diethylamide (LSD) and other Hallucinogens/
(14)C-DMT accumulates in rat brain cortical slices incubated at 37 °C. ... Most of the accumulated (14)C-DMT was associated with the cytoplasmic fraction. Of the portion associated with the crude mitochondrial fraction, 54.4% was associated with nerve-ending fraction.
The hallucinogenic substance N',N'-dimethyltryptamine and its precursor N-methyltryptamine were found in 24-hr specimens of urine from 19 normal human subjects; the mean excretion rates were 386 ng 24 hr(-1) and 856 ng 24 hr(-1) respectively. The urinary excretion of both compounds was unrelated to age, sex, urinary volume, or creatinine, nor was any consistent diurnal pattern observed. Rates for the mono and dimethylated compounds were not correlated. Diet and the intestinal flora were excluded as a source of urinary dimethyltryptamine. Administration to 4 subjects of sufficient ammonium chloride to /decrease/ the /pH/ of the urine caused a transient increase in dimethyltryptamine excretion but no consistent increase in the rate for N-methyltryptamine. Acidification of the urine did not appear to be the determining factor in this result since in one subject the same drop in urinary pH was achieved by feeding methionine without any increase in dimethyltryptamine excretion.
... Eighteen volunteers with prior experience in the use of psychedelics received single oral doses of encapsulated freeze-dried ayahuasca (0.6 and 0.85 mg of DMT/kg of body weight) and placebo. Ayahuasca produced significant subjective effects, peaking between 1.5 and 2 hr, involving perceptual modifications and increases in ratings of positive mood and activation. ...Cmax values for DMT after the low and high ayahuasca doses were 12.14 ng/mL and 17.44 ng/mL, respectively. Tmax (median) was observed at 1.5 hr after both doses. The Tmax for DMT coincided with the peak of subjective effects. ...
The endogenous hallucinogen, N,N-dimethyltryptamine (DMT), was labeled with (11)C and its regional distribution in rat brain studied. (11)C-DMT showed higher accumulation in the cerebral cortex, caudate putamen, and amygdaloid nuclei. Studies of the subcellular distribution of (11)C-DMT revealed the specific localization in the fractions enriched with serotonin receptors only when a very low dose was injected into rats. ...
[EN] FACTOR XIa INHIBITORS<br/>[FR] INHIBITEURS DU FACTEUR XIA
申请人：MERCK SHARP & DOHME
公开号：WO2015164308A1
公开（公告）日：2015-10-29
The present invention provides a compound of Formula (I) and pharmaceutical compositions comprising one or more said compounds, and methods for using said compounds for treating or preventing thromboses, embolisms, hypercoagulability or fibrotic changes. The compounds are selective Factor XIa inhibitors or dual inhibitors of Factor XIa and plasma kallikrein.
A facile procedure for synthesis of 3-[2-(N,N-dialkylamino)ethyl]-3-fluorooxindoles by direct fluorination of N,N-dialkyltryptamines
作者：Takayuki Seki、Tomoya Fujiwara、Yoshio Takeuchi
DOI：10.1016/j.jfluchem.2010.12.014
日期：2011.3
A practical procedure for the synthesis of 3-fluorooxindole derivatives having basic amine moieties was developed, which involves Selectfluor™-mediated oxidative fluorination of N,N-dialkyltryptamines in the presence of Lewis acid. This procedure was applied to an antimigraine drug, rizatriptan, to afford the corresponding 3-fluorooxindole, which is a potential fluorine-containing drug candidate.
Ruthenium Pincer Complex Catalyzed Selective Synthesis of C‐3 Alkylated Indoles and Bisindolylmethanes Directly from Indoles and Alcohols
作者：Nandita Biswas、Rahul Sharma、Dipankar Srimani
DOI：10.1002/adsc.202000326
日期：2020.7.29
catalyst for C‐3 alkylation of 1H‐indoles with various aliphatic primary and secondary alcohols including cyclic alcohols as well as benzylic alcohols. The selective synthesis of bisindolylmethane derivatives is also achieved from the same set of indole and alcohol just by altering the reaction parameters. Furthermore, the sustainable synthesis of C‐3 alkylated indoles directly from 2‐(2‐nitrophenyl)ethan‐1‐ol
A class of substituted imidazole, triazole and tetrazole derivatives are selective agonists of 5-HT.sub.1 -like receptors and are therefore useful in the treatment of clinical conditions, in particular migraine and associated disorders, for which a selective agonist of these receptors is indicated.
