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First time view on human metabolome changes after a single intake of 3,4 methylenedioxymethamphetamine (MDMA) in healthy placebo-controlled subjects

/ MDMA, Papers, Psychiatry & Medicine / / , , , ,

Abstract

3,4-Methylenedioxymethamphetamine (MDMA; “ecstasy”) is widely consumed recreationally. Little is known about its effects on the human metabolome. Mapping biochemical changes after drug exposure can complement traditional approaches by revealing potential biomarkers of organ toxicity or discovering new metabolomic features in a time- and dose-dependent manner. We aimed to analyze for the first time plasma samples from a randomized, double-blind, placebo-controlled crossover study in healthy adults to explore changes in endogenous plasma metabolites following a single intake of MDMA. Plasma samples from 15 subjects taken at four different time points were analyzed with the commercially available AbsoluteIDQ kit (Biocrates). Time series analysis revealed a total of nine metabolites, which showed a significant concentration change after MDMA administration compared with placebo. Paired t tests of the single time points showed statistically significant concentration changes mainly of glycerophospholipids and the metabolic ratio of methionine-sulfoxide over methionine. Changes of this metabolic ratio may be indicative for changes in systemic oxidative stress levels, and the increased amount of glycerophospholipids could be interpreted as an upregulation of energy production. Baseline samples within the experimental study design were crucial for evaluation of metabolomics data as interday individuality within subjects was high otherwise resulting in overestimations of the findings.
Boxler, M. I., Liechti, M. E., Schmid, Y., Kraemer, T., & Steuer, A. E. (2017). First Time View on Human Metabolome Changes after a Single Intake of 3, 4-Methylenedioxymethamphetamine in Healthy Placebo-Controlled Subjects. Journal of Proteome Research, 16(9), 3310-3320. 10.1021/acs.jproteome.7b00294
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Screening of Hallucinogenic Compounds and Genomic Characterisation of 40 Anatolian Salvia Species

/ Papers, Pharmacology & Chemistry, Salvia / Salvinorin A / / , , , , ,

Abstract

INTRODUCTION:
Salvia, an important and widely available member of Lamiaceae family. Although comparative analysis on secondary metabolites in several Salvia species from Turkey has been reported, their hallucinogenic chemicals have not been screened thoroughly.
OBJECTIVE:
This study provides LC-MS/MS analysis of 40 Salvia species for screening their psychoactive constituents of salvinorin A and salvinorin B. 5S-rRNA gene non-coding region of Salvia plants was sequenced, aligned and compared with that sequence of Salvia divinorum plant.
METHODOLOGY:
Targeted molecules of salvinorin A and salvinorin B were quantified, using LC-MS/MS, from all aerial parts of 40 Salvia species, collected from different parts of Turkey. Regions of 5S-rRNA gene from different species were amplified by polymerase chain reaction and DNA sequences were aligned with Salvia divinorum DNA sequences.
RESULTS:
Very few of the Salvia species (S. recognita, S. cryptantha and S. glutinosa) contained relatively high levels of salvinorin A (212.86 ± 20.46 μg/g, 51.50 ± 4.95 μg/g and 38.92 ± 3.74 μg/g, respectively). Salvinorin B was also found in Salvia species of S. potentillifolia, S. adenocaulon and S. cryptantha as 2351.99 ± 232.22 μg/g, 768.78 ± 75.90 μg/g and 402.24 ± 39.71 μg/g, respectively. The sequences of 5S-rRNA gene of 40 different Salvia species were presented and it was found that none of the Salvia species in Turkey had similar DNA sequence to Salvia divinorum plant.
CONCLUSION:
This is the first report of screening 40 Salvia species in Turkey according to their psychoactive constituents, salvinorin A and salvinorin B and their genomic structures. It is possible that some of these Salvia species may exhibit some psycho activity. Thus, they need to be screened further.
Hatipoglu, S. D., Yalcinkaya, B., Akgoz, M., Ozturk, T., Goren, A. C., & Topcu, G. (2017). Screening of Hallucinogenic Compounds and Genomic Characterisation of 40 Anatolian Salvia Species. Phytochemical Analysis. 10.1002/pca.2703
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From rau to sacred plants: Transfigurations of shamanic agency among the Siona Indians of Colombia

/ Anthropology & Sociology, Papers, Scientific Discipline / /

Abstract

Translations of the native notion of shamanic agency of the Siona Indians of Colombia is explored throughout different historical and social contexts. The polysemic concept rau is central to the shaman’s capacity for establishing relations of exchange and negotiation with humans and non-humans. As the embodiment of his power, it fits within a semantic field that conveys the waxing and waning of life cycles. Sharing a series of qualities with the Melanesian concept of mana, rau should be understood as a social phenomenon whose use and meaning has transfigured through time and space. However, unlike the globalization of new mana, the important notion of Siona shamanic agency has been substituted by representations of the ritual substance of yajé as key symbol for power and knowledge as Siona rituals have been revitalized in their dialogue with the ethnic identity movement and the neo-shamanic network that associates sacred plants with primordial knowledge and agency.
Langdon, E. J. (2017). From rau to sacred plants: Transfigurations of shamanic agency among the Siona Indians of Colombia. Social Compass, 64(3), 343-359. 10.1177/0037768617713654
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Posttraumatic Stress Disorder: An Integrated Overview of the Neurobiological Rationale for Pharmacology

/ Anxiety Disorders / PTSD, Neuroscience, Papers, Psychology / / , , , ,

Abstract

Thirty years of research on the biology of posttraumatic stress disorder now provides a foundation for hypotheses related to the mechanisms underlying the pharmacotherapy of this disorder. Only two medications, sertraline and paroxetine, are approved by the U.S. Food and Drug Administration for the treatment of PTSD. Although these medications are somewhat effective, other treatment mechanisms must be explored to address the unmet need for effective treatment. This article provides a concise summary of advances in our understanding of the neurobiology of PTSD and novel approaches to pharmacotherapy.
Kelmendi, B., Adams, T. G., Southwick, S., Abdallah, C. G., & Krystal, J. H. (2017). Posttraumatic stress disorder: An integrated overview of the neurobiological rationale for pharmacology. Clinical Psychology: Science and Practice. 10.1111/cpsp.12202
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European Psilocybin Seminar at Tyringham Hall

/ Publications /

Tyringham Hall In June 2017, a two-day seminar on psilocybin for European therapists and researchers took place at Tyringham Hall, in the UK. The event was organised by OPEN in collaboration with UK mental health company Compass Pathways.
During a wonderful weekend at Tyringham Hall, near Oxford in the UK, attendees were invited to learn from leading experts in psychedelic-assisted psychotherapy, to discuss necessary competencies and other requirements for clinical applications of psilocybin, and to better understand pathways towards regulatory approval and patient access.
Facilitated by leading experts in the field of psilocybin research and therapy from the US, Switzerland and the UK, the participants discussed competencies for (new) therapists aiming to conduct research into psilocybin for various clinical indications. Attendees could learn from both patients and therapists on the importance of preparing, and supporting people in psilocybin-facilitated treatment at NYU, Imperial College and in Switzerland.
This small meeting consisted of a great mixture of academic researchers, clinicians and therapists from all over Europe: Denmark, Sweden, Norway, Portugal, Switzerland, Germany, Czech Republic, the Netherlands, Israel and the United Kingdom. With serious discussions, plenty of time for everyone to connect and share experiences, in a breath-taking setting, this was an inspiring first meeting of like-minded researchers and clinicians.

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Monoamine receptor interaction profiles of 4-thio-substituted phenethylamines (2C-T drugs)

/ Neuroscience, Papers / / , , ,

Abstract

BACKGROUND:
4-Thio-substituted phenethylamines (2C-T drugs) are potent psychedelics with poorly defined pharmacological properties. Because of their psychedelic effects, 2C-T drugs are sometimes sold as new psychoactive substances (NPSs). The aim of the present study was to characterize the monoamine receptor and transporter interaction profiles of a series of 2C-T drugs.
METHODS:
We determined the binding affinities of 2C-T drugs at monoamine receptors and transporters in human cells that were transfected with the respective receptors or transporters. We also investigated the functional activation of serotonergic 5-hydroxytryptamine 2A (5-HT2A) and 5-HT2B receptors, activation of human trace amine-associated receptor 1 (TAAR1), and inhibition of monoamine uptake transporters.
RESULTS:
2C-T drugs had high affinity for 5-HT2A and 5-HT2C receptors (1-54 nM and 40-350 nM, respectively). With activation potencies of 1-53 nM and 44-370 nM, the drugs were potent 5-HT2A receptor and 5-HT2B receptor, respectively, partial agonists. An exception to this were the benzylthiophenethylamines, which did not potently activate the 5-HT2B receptor (EC50 > 3000 nM). Furthermore, the compounds bound to serotonergic 5-HT1A and adrenergic receptors. The compounds had high affinity for the rat TAAR1 (5-68 nM) and interacted with the mouse but not human TAAR1. The 2C-T drugs did not potently interact with monoamine transporters (Ki > 4000 nM).
CONCLUSION:
The receptor binding profile of 2C-T drugs predicts psychedelic effects that are mediated by potent 5-HT2 receptor interactions.
Luethi, D., Trachsel, D., Hoener, M. C., & Liechti, M. E. (2017). Monoamine receptor interaction profiles of 4-thio-substituted phenethylamines (2C-T drugs). Neuropharmacology. 10.1016/j.neuropharm.2017.07.012
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MDMA-Induced Dissociative State not Mediated by the 5-HT2A Receptor

/ MDMA, Neuroscience, Papers, Psychology, Publications / / , , , , , ,

Abstract

Previous research has shown that a single dose of MDMA induce a dissociative state, by elevating feelings of depersonalization and derealization. Typically, it is assumed that action on the 5-HT2A receptor is the mechanism underlying these psychedelic experiences. In addition, other studies have shown associations between dissociative states and biological parameters (heart rate, cortisol), which are elevated by MDMA. In order to investigate the role of the 5-HT2 receptor in the MDMA-induced dissociative state and the association with biological parameters, a placebo-controlled within-subject study was conducted including a single oral dose of MDMA (75 mg), combined with placebo or a single oral dose of the 5-HT2 receptor blocker ketanserin (40 mg). Twenty healthy recreational MDMA users filled out a dissociative states scale (CADSS) 90 min after treatments, which was preceded and followed by assessment of a number of biological parameters (cortisol levels, heart rate, MDMA blood concentrations). Findings showed that MDMA induced a dissociative state but this effect was not counteracted by pre-treatment with ketanserin. Heart rate was the only biological parameter that correlated with the MDMA-induced dissociative state, but an absence of correlation between these measures when participants were pretreated with ketanserin suggests an absence of directional effects of heart rate on dissociative state. It is suggested that the 5-HT2 receptor does not mediate the dissociative effects caused by a single dose of MDMA. Further research is needed to determine the exact neurobiology underlying this effect and whether these effects contribute to the therapeutic potential of MDMA.
Puxty, D. J., Ramaekers, J. G., de la Torre, R., Farré, M., Pizarro, N., Pujadas, M., & Kuypers, K. P. (2017). MDMA-induced dissociative state not mediated by the 5-HT2A receptor. Frontiers in pharmacology, 8, 455. 10.3389/fphar.2017.00455
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A Physician’s Attempt to Self-Medicate Bipolar Depression with N,N-Dimethyltryptamine (DMT)

/ Depressive Disorders, DMT, Papers, Psychology / / , , , ,

Abstract

N,N-dimethyltryptamine (DMT) is a psychoactive substance that has been gaining popularity in therapeutic and recreational use. This is a case of a physician who chronically took DMT augmented with phenelzine in an attempt to self-medicate refractory bipolar depression. His presentation of altered mental status, mania, and psychosis is examined in regards to his DMT use. This case discusses DMT, the possible uses of DMT, and the theorized mechanism of DMT in psychosis and treatment of depression, particularly involving its agonist activity at 5-HT1A, 5-HT2A, and 5-HT2C. It is also important to recognize the dangers of self-medication, particularly amongst physicians.
Brown, T., Shao, W., Ayub, S., Chong, D., Cornelius, C. A Physician’s Attempt to Self-Medicate Bipolar Depression with N,N-Dimethyltryptamine (DMT). Journal of Psychoactive Drugs. 10.1080/02791072.2017.1344898
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Hallucinogens and Serotonin 5-HT2A Receptor-Mediated Signaling Pathways

/ LSD, Mescaline / Cacti, Mushrooms / Psilocybin, Neuroscience, Papers / / ,

Abstract

The neuropsychological effects of naturally occurring psychoactive chemicals have been recognized for millennia. Hallucinogens, which include naturally occurring chemicals such as mescaline and psilocybin, as well as synthetic compounds, such as lysergic acid diethylamide (LSD), induce profound alterations of human consciousness, emotion, and cognition. The discovery of the hallucinogenic effects of LSD and the observations that LSD and the endogenous ligand serotonin share chemical and pharmacological profiles led to the suggestion that biogenic amines like serotonin were involved in the psychosis of mental disorders such as schizophrenia. Although they bind other G protein-coupled receptor (GPCR) subtypes, studies indicate that several effects of hallucinogens involve agonist activity at the serotonin 5-HT2Areceptor. In this chapter, we review recent advances in understanding hallucinogen drug action through characterization of structure, neuroanatomical location, and function of the 5-HT2A receptor.
López-Giménez, J. F., & González-Maeso, J. (2017). Hallucinogens and Serotonin 5-HT2A Receptor-Mediated Signaling Pathways. 10.1007/7854_2017_478
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The Effects of Hallucinogens on Gene Expression

/ LSD, Neuroscience, Papers / / ,

Abstract

The classic serotonergic hallucinogens, or psychedelics, have the ability to profoundly alter perception and behavior. These can include visual distortions, hallucinations, detachment from reality, and mystical experiences. Some psychedelics, like LSD, are able to produce these effects with remarkably low doses of drug. Others, like psilocybin, have recently been demonstrated to have significant clinical efficacy in the treatment of depression, anxiety, and addiction that persist for at least several months after only a single therapeutic session. How does this occur? Much work has recently been published from imaging studies showing that psychedelics alter brain network connectivity. They facilitate a disintegration of the default mode network, producing a hyperconnectivity between brain regions that allow centers that do not normally communicate with each other to do so. The immediate and acute effects on both behaviors and network connectivity are likely mediated by effector pathways downstream of serotonin 5-HT2A receptor activation. These acute molecular processes also influence gene expression changes, which likely influence synaptic plasticity and facilitate more long-term changes in brain neurochemistry ultimately underlying the therapeutic efficacy of a single administration to achieve long-lasting effects. In this review, we summarize what is currently known about the molecular genetic responses to psychedelics within the brain and discuss how gene expression changes may contribute to altered cellular physiology and behaviors.
Martin, D. A., & Nichols, C. D. (2017). The Effects of Hallucinogens on Gene Expression. 10.1007/7854_2017_479
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Journal Club #28: Efficacy and Safety of Psilocybin in Treatment-Resistant Depression: Results of the EPIsoDE Trial - October 6

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