OPEN Foundation

Addiction

Ayahuasca blocks the reinstatement of methylphenidate-induced conditioned place preference in mice: behavioral and brain Fos expression evaluations

Abstract

Rationale: Accumulating evidence suggests that ayahuasca, a hallucinogenic beverage used in traditional Amazonian communities for ritualistic and curative purposes, has been associated with reduced rates of substance use disorders. However, the brain mechanisms underlying the therapeutic effects of ayahuasca have not yet been fully elucidated.

Objectives: The aim of the present study was to investigate the effects of treatment with ayahuasca on the rewarding properties of the psychostimulant methylphenidate.

Methods: The rewarding properties of ayahuasca (100 mg/kg, orally) and methylphenidate (10 mg/kg, i.p.) were investigated using the conditioned place preference (CPP) model. Furthermore, we evaluated the effects of repeated treatment with ayahuasca on the reinstatement of methylphenidate-induced CPP. Fos expression was evaluated in different limbic structures (cingulate cortex-area 1, prelimbic cortex, infralimbic cortex, orbitofrontal cortex-lateral orbital area, nucleus accumbens core and shell, ventral tegmental area, dorsal striatum, and basolateral amygdala) upon each experimental phase.

Results: Both ayahuasca and methylphenidate induced CPP in mice. However, ayahuasca had limited effects on Fos expression, while methylphenidate altered Fos expression in several brain regions associated with the behavioral effects of drugs of abuse. Treatment with ayahuasca after conditioning with methylphenidate blocked the reinstatement of methylphenidate-induced CPP. Those behavioral effects were accompanied by changes in Fos expression patterns, with ayahuasca generally blocking the changes in Fos expression induced by conditioning with methylphenidate and/or reexposure to methylphenidate.

Conclusions: Our findings suggest that ayahuasca restored normal brain function in areas associated with the long-term expression of drug wanting/seeking in animals conditioned to methylphenidate.

Reis, H. S., Rodrigues, I., Anjos-Santos, A., Libarino-Santos, M., Serra, Y. A., Cata-Preta, E. G., Oliveira-Campos, D., Kisaki, N. D., Barros-Santos, T., Yokoyama, T. S., Cruz, F. C., Oliveira-Lima, A. J., Barbosa, P., Berro, L. F., & Marinho, E. (2020). Ayahuasca blocks the reinstatement of methylphenidate-induced conditioned place preference in mice: behavioral and brain Fos expression evaluations. Psychopharmacology, 237(11), 3269–3281. https://doi.org/10.1007/s00213-020-05609-6

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Psilocybin and LSD Have No Long-Lasting Effects in an Animal Model of Alcohol Relapse

Abstract

For most psychiatric disorders, including alcohol use disorder (AUD), approved pharmacological treatments are limited in their effectiveness, and new drugs that can easily be translated into the clinic are needed. Currently, great hope lies in the potential of psychedelics to effectively treat AUD. The primary hypothesis is that a single session of psychedelic-guided psychotherapy can restore normal brain function in AUD individuals and thereby reduce the risk of relapse in the long run. Here we applied three different treatment schedules with psilocybin/LSD in order to investigate relapse-like drinking in the alcohol deprivation effect (ADE) model. In contrast to the primary hypothesis, psychedelics had no long-lasting effects on the ADE in male and female rats, neither when administered in a high dosage regime that is comparable to the one used in clinical studies, nor in a chronic microdosing scheme. Only sub-chronic treatment with psilocybin produced a short-lasting anti-relapse effect. However, it is not a translatable treatment option to give psychedelics sub-chronically for relapse prevention. In conclusion, our results in the ADE model do not support the hypothesis that microdosing or high doses of psychedelic reduce relapse behavior. This conclusion has to be confirmed by applying other animal models of AUD. It could also well be that animal models of AUD might be unable to fully capture the therapeutic potential of psychedelic drugs and that only future large-scale clinical trials will be able to demonstrate the efficacy of psychedelics as a new treatment option for AUD.

Meinhardt, M. W., Güngör, C., Skorodumov, I., Mertens, L. J., & Spanagel, R. (2020). Psilocybin and LSD have no long-lasting effects in an animal model of alcohol relapse. Neuropsychopharmacology, 1-9., https://doi.org/10.1038/s41386-020-0694-z
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Psychedelics and Psychedelic-Assisted Psychotherapy

Abstract

Objective: The authors provide an evidenced-based summary of the literature on the clinical application of psychedelic drugs in psychiatric disorders.
Methods: Searches of PubMed and PsycINFO via Ovid were conducted for articles in English, in peer-reviewed journals, reporting on “psilocybin,” “lysergic acid diethylamide,” “LSD,” “ayahuasca,” “3,4-methylenedioxymethamphetamine,” and “MDMA,” in human subjects, published between 2007 and July 1, 2019. A total of 1,603 articles were identified and screened. Articles that did not contain the terms “clinical trial,” “therapy,” or “imaging” in the title or abstract were filtered out. The 161 remaining articles were reviewed by two or more authors. The authors identified 14 articles reporting on well-designed clinical trials investigating the efficacy of lysergic acid diethylamide (LSD), 3,4-methylenedioxymethamphetamine (MDMA), psilocybin, and ayahuasca for the treatment of mood and anxiety disorders, trauma and stress-related disorders, and substance-related and addictive disorders as well as in end-of-life care.
Results: The most significant database exists for MDMA and psilocybin, which have been designated by the U.S. Food and Drug Administration (FDA) as “breakthrough therapies” for posttraumatic stress disorder (PTSD) and treatment-resistant depression, respectively. The research on LSD and ayahuasca is observational, but available evidence suggests that these agents may have therapeutic effects in specific psychiatric disorders.
Conclusions: Randomized clinical trials support the efficacy of MDMA in the treatment of PTSD and psilocybin in the treatment of depression and cancer-related anxiety. The research to support the use of LSD and ayahuasca in the treatment of psychiatric disorders is preliminary, although promising. Overall, the database is insufficient for FDA approval of any psychedelic compound for routine clinical use in psychiatric disorders at this time, but continued research on the efficacy of psychedelics for the treatment of psychiatric disorders is warranted.

Keywords: Ayahuasca; Drug-Psychotherapy Combination; Lysergic Acid Diethylamide; MDMA; Psilocybin; Psychedelics.
Reiff, C. M., Richman, E. E., Nemeroff, C. B., Carpenter, L. L., Widge, A. S., Rodriguez, C. I., … & Work Group on Biomarkers and Novel Treatments, a Division of the American Psychiatric Association Council of Research. (2020). Psychedelics and psychedelic-assisted psychotherapy. American Journal of Psychiatry177(5), 391-410., https://doi.org/10.1176/appi.ajp.2019.19010035
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A Single Administration of the Atypical Psychedelic Ibogaine or Its Metabolite Noribogaine Induces an Antidepressant-Like Effect in Rats

Abstract

Anecdotal reports and open-label case studies in humans indicated that the psychedelic alkaloid ibogaine exerts profound antiaddictive effects. Ample preclinical evidence demonstrated the efficacy of ibogaine, and its main metabolite, noribogaine, in substance-use-disorder rodent models. In contrast to addiction research, depression-relevant effects of ibogaine or noribogaine in rodents have not been previously examined. We have recently reported that the acute ibogaine administration induced a long-term increase of brain-derived neurotrophic factor mRNA levels in the rat prefrontal cortex, which led us to hypothesize that ibogaine may elicit antidepressant-like effects in rats. Accordingly, we characterized behavioral effects (dose- and time-dependence) induced by the acute ibogaine and noribogaine administration in rats using the forced swim test (FST, 20 and 40 mg/kg i.p., single injection for each dose). We also examined the correlation between plasma and brain concentrations of ibogaine and noribogaine and the elicited behavioral response. We found that ibogaine and noribogaine induced a dose- and time-dependent antidepressant-like effect without significant changes of animal locomotor activity. Noribogaine’s FST effect was short-lived (30 min) and correlated with high brain concentrations (estimated >8 μM of free drug), while the ibogaine’s antidepressant-like effect was significant at 3 h. At this time point, both ibogaine and noribogaine were present in rat brain at concentrations that cannot produce the same behavioral outcome on their own (ibogaine ∼0.5 μM, noribogaine ∼2.5 μM). Our data suggests a polypharmacological mechanism underpinning the antidepressant-like effects of ibogaine and noribogaine.
Rodríguez, P., Urbanavicius, J., Prieto, J. P., Fabius, S., Reyes, A. L., Havel, V., … & Carrera, I. (2020). A Single Administration of the Atypical Psychedelic Ibogaine or its Metabolite Noribogaine Induces an Antidepressant-like Effect in Rats. ACS Chemical Neuroscience., https://doi.org/10.1021/acschemneuro.0c00152
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Can MDMA help to treat addiction? Q&A with Ben Sessa

Until now, MDMA has mostly been studied in the context of treating PTSD and helping with autism. Psychiatrist Ben Sessa is now conducting the world’s first clinical study using MDMA-assisted psychotherapy to treat alcohol addiction, at the University of Bristol. According to him MDMA can be effective to treat addiction issues, because it “brings a particular emphasis on empathy and connection with the positive, loving part of the self, and that’s why it’s good for trauma.”
You often say that 2/3 of people with addictions have been traumatised or abused. Do you think there is addiction without trauma?
It depends on how you define trauma. There’s what I call ‘big T trauma’ and ‘little t trauma’. Not all people with addictions have suffered severe physical or sexual abuse. But if you ask people what was their experience of childhood, a vast majority of them will say it was cold: they didn’t feel loved or wanted, their parents weren’t really there for them. Those experiences fit in with what you’d call emotional abuse. Most people don’t recognise it as such, but they’re left feeling somewhat empty by it. It’s the most common factor in people with addictions.
Given this knowledge about where addiction comes from, why are most conventional treatments largely unsuccessful?
It’s a very difficult illness to treat, because of the availability of drugs and alcohol, the problem of social deprivation and poverty, homelessness and poor housing, racism, exclusion, poor education, lack of childcare, etc. If I had a magic wand and could instantly cure an addiction patient, but then sent them back to their dire home situation with transgenerational lack of hope, poverty and exclusion, they’re just going to pick up their addiction again. So it’s a very multidisciplinary problem with multiple factors that cause and maintain it, and we need to address all those factors.
Why then do psychedelics seem to do better in the treatment of addictions than conventional treatments?
Because underlying addiction, and many if not most chronic mental disorders, is rigidity. Stuck rigid mental narratives about self and the world, which arise early in life as a results of early experiences, in other words, the very core building blocks of our personality, which stay with us for life. The majority of mental health treatments, and certainly all the medicines we use, like SSRI’s, don’t do anything to those narratives, they just paper over the cracks and treat the overlying symptoms. In my experience, psychedelics are the best new form of pharmacology that we’ve come across that has the potential to actually tackle those narratives and allows people to build them up in a new, more positive way.
You’re currently conducting a study with MDMA to treat alcohol addiction. This is the first time MDMA is used for that indication. Why did you choose MDMA over psilocybin?
I was always interested in doing an MDMA study. Five years ago, I was in communication with MAPS about an MDMA/PTSD study. But then I got an offer from a rich benefactor which allowed me to do whatever I wanted. As I was working in addictions at the time, I decided to branch away from PTSD. I was acutely aware of alcoholism as being the number one addiction problem with a massive clinical and personal burden, and a very difficult one to treat. I also liked the fact that no-one else had ever suggested MDMA for addiction. Since trauma appears to be a big part of addictions, and MDMA has been shown to work in trauma treatment, it seemed to make sense that MDMA could work for addictions.
Do you think MDMA therapy and psilocybin therapy share the same paradigm?
They clearly have massive overlaps and similarities, for instance the fact of using a non-ordinary state of consciousness as an augmentation of psychotherapy. People would argue that MDMA isn’t a psychedelic, or at least not a classic one. However, I do think it fits into the same paradigm and I consider it a psychedelic psychotherapy tool. There are clearly also some big differences. With MDMA, you don’t get the ego dissolution that occurs on high doses of classic psychedelics. What you do get is a particular emphasis on empathy and connection with the positive, loving part of the self, and that’s why it’s good for trauma. The barrier to addressing trauma for many patients is this brick wall they hit, that prevents them from believing that they are worthy, after often spending decades believing they’re not. MDMA has this greater capacity than psilocybin to put you in a predominantly loving and warm state.
Where’s your MDMA/alcohol study at right now?
We have 14 participants, we finished dosing at the beginning of December, and we’re following everyone up to 9 months from the date of initial detox, so that will be until June. We’re assessing and analysing the data, and we’re writing the papers, which will be published in the first half of this year. This is a safety and tolerability study, with no placebo control group, which is what you have to do when using a new drug in a new condition for the first time. Obviously, we’re also looking at the subjects’ drinking behaviour and maintenance of abstinence and we’ll report on that, and the results look extremely promising. With conventional therapy, about 80% of patients go back to drinking in the next few months, and so far we have about 17% of people who went back to drinking again.
In his talk at ICPR 2020, Ben Sessa will elaborate on his MDMA/alcohol study and sketch future perspectives of psychedelic therapy research.

Psilocybin Therapeutic Research: The Present and Future Paradigm

Abstract

Psilocybin, an active component in “magic mushroom”, may have the potential to meet the therapeutic needs for a number of indications without the addictiveness and overdose risk of other mind-altering drugs, such as cocaine, heroin, alcohol, methamphetamine, and so forth. The need for new therapies is urgent because addiction, overdose, and suicide deaths have risen throughout the United States and around the world. Anecdotal and contemporary pharmacological reports have provided some indication about the therapeutic use of psilocybin for the treatment of mental health disorders such as major depressive disorder and addiction disorders. In this Viewpoint, I summarize the current state of psilocybin therapeutic research and attempt to provide some insight into future directions on which the scientific community may wish to focus.

Kargbo, R. B. (2020). Psilocybin Therapeutic Research: The Present and Future Paradigm. ACS Medicinal Chemistry Letters11(4), 399-402.; 10.1021/acsmedchemlett.0c00048

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A review of emerging therapeutic potential of psychedelic drugs in the treatment of psychiatric illnesses

Abstract

Though there was initial interest in the use of psychedelic drugs for psychiatric treatment, bad outcomes and subsequent passage of the Substance Act of 1970, which placed psychedelic drugs in the Schedule I category, significantly limited potential progress. More recently, however, there has been renewal in interest and promise of psychedelic research. The purpose of this review is to highlight contemporary human studies on the use of select psychedelic drugs, such as psilocybin, LSD, MDMA and ayahuasca, in the treatment of various psychiatric illnesses, including but not limited to treatment-resistant depression, post-traumatic stress disorder, end-of-life anxiety, and substance use disorders. The safety and efficacy as reported from human and animal studies will also be discussed. Accumulated research to date has suggested the potential for psychedelics to emerge as breakthrough therapies for psychiatric conditions refractory to conventional treatments. However, given the unique history and high potential for misuse with popular distribution, special care and considerations must be undertaken to safeguard their use as viable medical treatments rather than drugs of abuse.

Chi, T., & Gold, J. A. (2020). A review of emerging therapeutic potential of psychedelic drugs in the treatment of psychiatric illnesses. Journal of the Neurological Sciences, 116715., 10.1016/j.jns.2020.116715
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Persisting Reductions in Cannabis, Opioid, and Stimulant Misuse After Naturalistic Psychedelic Use: An Online Survey.

Abstract

Background: Observational data and preliminary studies suggest serotonin 2A agonist psychedelics may hold potential in treating a variety of substance use disorders (SUDs), including opioid use disorder (OUD).

Aims: The study aim was to describe and analyze self-reported cases in which naturalistic psychedelic use was followed by cessation or reduction in other substance use.

Methods: An anonymous online survey of individuals reporting cessation or reduction in cannabis, opioid, or stimulant use following psychedelic use in non-clinical settings.

Results: Four hundred forty-four respondents, mostly in the USA (67%) completed the survey. Participants reported 4.5 years of problematic substance use on average before the psychedelic experience to which they attributed a reduction in drug consumption, with 79% meeting retrospective criteria for severe SUD. Most reported taking a moderate or high dose of LSD (43%) or psilocybin-containing mushrooms (29%), followed by significant reduction in drug consumption. Before the psychedelic experience 96% met SUD criteria, whereas only 27% met SUD criteria afterward. Participants rated their psychedelic experience as highly meaningful and insightful, with 28% endorsing psychedelic-associated changes in life priorities or values as facilitating reduced substance misuse. Greater psychedelic dose, insight, mystical-type effects, and personal meaning of experiences were associated with greater reduction in drug consumption.

Conclusions: While these cross-sectional and self-report methods cannot determine whether psychedelics caused changes in drug use, results suggest the potential that psychedelics cause reductions in problematic substance use, and support additional clinical research on psychedelic-assisted treatment for SUD.

Garcia-Romeu, A., Davis, A. K., Erowid, E., Griffiths, R. R., & Johnson, M. W. (2020). Persisting reductions in cannabis, opioid, and stimulant misuse after naturalistic psychedelic use: An online survey. Frontiers in psychiatry10, 955; 10.3389/fpsyt.2019.00955
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Therapeutic Use of LSD in Psychiatry: A Systematic Review of Randomized-Controlled Clinical Trials.

Abstract

Lysergic acid diethylamide (LSD) was studied from the 1950s to the 1970s to evaluate behavioral and personality changes, as well as remission of psychiatric symptoms in various disorders. LSD was used in the treatment of anxiety, depression, psychosomatic diseases and addiction. However, most of the studies were not performed under contemporary standards, and it has taken several decades for a resurgence of interest in LSD research and its therapeutic potential for psychiatry. The aim of this review is to identify controlled and randomized clinical trials that assess the potential use of LSD in psychiatry. PRISMA guidelines for systematic review were followed. A literature search of PubMed and Psychedelic bibliography from Multidisciplinary Association for Psychedelic Studies (MAPS) databases was performed as well as a manual search of references from evaluated studies. Only randomized-controlled clinical trials were included. Study quality was systematically calculated by using the Cochrane Collaboration Tool for assessing risk of bias. A final selection of 11 articles was made after considering inclusion and exclusion criteria. LSD was administered to 567 patients in a dose ranging from 20 to 800 mcg. Despite the design heterogeneity of clinical trials, positive results were observed, thus revealing the therapeutic potential of LSD to reduce psychiatric symptomatology, mainly in alcoholism. The vast majority of authors describe significant and positive short-term changes in patients, despite the fact that in some studies an important homogenization was observed between the LSD treatment group and control group at long-term follow-up. Multiple variables regarding LSD treatment therapeutic approach and quality of experience were revealed and related to therapeutic outcomes. LSD is revealed as a potential therapeutic agent in psychiatry; the evidence to date is strongest for the use of LSD in the treatment of alcoholism. Despite the difficulty of designing proper double blind clinical trials with this substance, new studies that conform to modern standards are necessary in order to strengthen our knowledge on its use and open new doors in the future.
Fuentes, J. J., Fonseca, F., Elices, M., Farre, M., & Torrens, M. (2019). Therapeutic use of LSD in psychiatry: A systematic review of randomized-controlled clinical trials. Frontiers in Psychiatry10, 943., https://doi.org/10.3389/fpsyt.2019.00943
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Preliminary Report on the Effects of a Low Dose of LSD on Resting-State Amygdala Functional Connectivity.

Abstract

BACKGROUND:
The practice of “microdosing,” or the use of repeated, very low doses of lysergic acid diethylamide (LSD) to improve mood or cognition, has received considerable public attention, but empirical studies are lacking. Controlled studies are needed to investigate both the therapeutic potential and the neurobiological underpinnings of this pharmacologic treatment.
METHODS:
The present study was designed to examine the effects of a single low dose of LSD (13 μg) versus placebo on resting-state functional connectivity and cerebral blood flow in healthy young adults. Twenty men and women, 18 to 35 years old, participated in 2 functional magnetic resonance imaging scanning sessions in which they received placebo or LSD under double-blind conditions. During each session, the participants completed drug effect and mood questionnaires, and physiological measures were recorded. During expected peak drug effect, they underwent resting-state blood oxygen level-dependent and arterial spin labeling scans. Cerebral blood flow as well as amygdala and thalamic connectivity were analyzed.
RESULTS:
LSD increased amygdala seed-based connectivity with the right angular gyrus, right middle frontal gyrus, and the cerebellum, and decreased amygdala connectivity with the left and right postcentral gyrus and the superior temporal gyrus. This low dose of LSD had weak and variable effects on mood, but its effects on positive mood were positively correlated with the increase in amygdala-middle frontal gyrus connectivity strength.
CONCLUSIONS:
These preliminary findings show that a very low dose of LSD, which produces negligible subjective changes, alters brain connectivity in limbic circuits. Additional studies, especially with repeated dosing, will reveal whether these neural changes are related to the drug’s purported antidepressant effect.

Bershad, A. K., Preller, K. H., Lee, R., Keedy, S., Wren-Jarvis, J., Bremmer, M. P., & de Wit, H. (2019). Preliminary report on the effects of a low dose of LSD on resting state amygdalar functional connectivity. Biological Psychiatry: Cognitive Neuroscience and Neuroimaging., https://doi.org/10.1016/j.bpsc.2019.12.007
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7 May - Psychedelics, Nature & Mental Health with Sam Gandy

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