One of the ways your brain adapts is through the up-and-down regulation of receptors. So if your serotonin receptors get hyper-activated by serotonin molecules, they may retreat into the membrane of the dendrite, essentially shutting themselves down for a while. One theory says that they do this in order to avoid getting damaged from over-stimulation. Another theory says that it is just a way for your brain to maintain a balanced, normal state. Whichever one of these theories is true, it has been proven conclusively that serotonin receptors will down-regulate over time if bombarded with large amounts of serotonin.Down-regulation may lead to depression even after your brain’s serotonin levels have been restored. Many ecstasy users report periods of depression that can last many months, even after they have stopped using ecstasy.

Its acute risks include hyperthermia (dangerously high body temperature) and hyponatremia (low blood sodium) due to excessive water intake without electrolyte replenishment. An investigator unaware of the participant’s history carried out a region-of-interest analysis using a standard template for the frontal cortex, midbrain and cerebellum constructed manually from co-registered MR images in 4 control subjects. The binding in the cerebellum, which is presumed to be low in SERT, was used as a reference for background radioactivity (non-specific binding + free ligand). The ratios of specific to non-specific 123Iβ-CIT binding in midbrain and the frontal cortex were calculated by dividing specific frontal cortex and midbrain binding by unspecific binding in the cerebellum, which is a well-established measure for assessment of SERT density 38, 39. It’s much easier for your body to keep itself cool if the air temperature is low. In one experiment, rats placed in a cool room suffered no neurotoxicity from a dose of MDMA that extensively damaged the brains of rats in a warm room.13 If you’re going to be out dancing, pick a club that’s cool and has good air flow, and regularly take short breaks to cool off and assess how you’re doing.

The neurotoxic effect of MDMA in mice seems to be related to dopaminergic and serotonergic systems. Our data showed a significant decrease in markers of neuronal terminals, DAT, and SERT in the mouse striatum and frontal cortex after chronic administration of MDMA. There was also depletion of tissue concentration of DOPAC and 5-HIAA, but not DA and 5-HT, in the striatum and the frontal cortex of mice. Neurotoxic effect seems to result from formation of ROS because we observed oxidative damage of neuronal DNA in the cortex 2 months after acute and chronic doses of MDMA.

• Along with binding to receptors on the dendrite, serotonin molecules also bind to reuptake transporters on the axon.
• These transporters take the molecule and transport it back into the axon terminal.
• Current evidence suggests adults are more sensitive to the long-term serotonin depletions following MDMA but younger ages also exhibit substantial and rapid neuroplasticity.
• Of interest, MDMA has a different pharmacology in the mouse compared to other laboratory animals.

ANIMAL STUDIES

Using the same species and age, an augmented hyperthermia was identified with daily treatments, also for two weeks by 34. A locomotor sensitization two weeks after an escalating MDMA regimen was reported 127,128. In contrast, the serotonin syndrome and pyrexia was substantially reduced one week after a rat MDMA binge 142. Emergency medical personnel occasionally encounter patients that consumed ecstasy and are running a fever over 43 °C 58. Accordingly, the capacity of MDMA to increase core temperature has been a primary research focus of many laboratories.

So, systemic administration of the nitric oxide synthase (NOS) inhibitors N-nitro-l-arginine (l-NOARG) or S-methyl-l-thiocitrulline inhibits brain NOS activity and provides protection against MDMA-induced indole depletion without attenuating the acute hyperthermia induced by this amphetamine analog 151,152. Of interest, some in vitro studies have also demonstrated that the non-selective NOS inhibitor, N-ω-nitro-l-arginine 153 and specific inhibitors of the inducible and neuronal nitric oxide synthase (NOS) 154 partially prevented MDMA neurotoxicity, further suggesting the involvement of reactive nitrogen species in the toxic effect. Due to the limitations of allometric scaling, other authors have proposed to use the effect scaling, as an alternative strategy for matching equivalent doses of MDMA in rats or non-human primates and humans 25, 108.

Inactive placebos, such as lactose, fail to produce physiological and psychological responses noticeable to trained clinicians or experienced MDMA users. This raises the question as to whether or not studies utilizing inactive placebos can truly be considered double-blind experiments. Patients in the experimental treatment group received an initial dose of 125 mg of MDMA followed by an additional 62.5 mg after 2.5 h. The active placebo group received an initial dose of 25 mg of MDMA followed by an additional 12.5 mg 2.5 h later.

Brain Serotonin Function in MDMA (Ecstasy) Users: Evidence for Persisting Neurotoxicity

For more detailed information and research on MDMA neurotoxicity, visit Erowid.org. There are no differences in sleep patterns, sub-clinical psychiatric disturbances or any other environmental factors that could affect test performance. 9 Vollenweider FX, Gucker P, Schönbächler R, Kamber E, Vollenweider-Scherpenhuyzen MFI, Schubiger G, Hell D “Effects of MDMA on 5-HT uptake sites using PET and 11C-McN5652 in humans” Conference of the German Society for Psychiatry, Psychotherapy and Neuromedicine, 2000. If Ricaurte et al have additional information about this case that was unavailable to the doctors treating the patient, they have made no mention of it. At the least, it was dishonest to characterize this case simply as an example of “MDMA-induced Parkinsonism” with no mention of the extraordinarily tenuous and speculative nature of the proposed causal link between the patient’s drug use and his neurological symptoms.

• The supernatant was discarded while the pellet was resuspended in the same volume of homogenization medium without Triton and centrifuged at 850×g for 10 min.
• It should also be noted, however, that rats depleted of vesicular and cytoplasmic dopamine stores by means of previous treatment with reserpine and α-methyl-p-tyrosine (AMPT) showed no deficits of 5-HT after MDMA.
• However, it remains unclear how glutamate and GABA release may be involved in upregulation of serotonergic neurons and cause very potent response to the challenging dose of MDMA, as we observed in the present study.
• Caffeine potentiated the oxidative damage of nuclear DNA induced by MDMA and had no effect on MDMA-induced decrease in DAT density in the frontal cortex; however, it reversed MDMA-induced DAT decrease in the striatum.
• MDMA was a chemical intermediate in the synthesis of hydrastinin, an astringent to control bleeding.

The long-term effects of MDMA on the brain

Hence, MDMA causes neurotoxicity through different mechanisms; either by acting directly on the neuronal brain activity or by other indirect pathways. Future studies regarding the treatment of the detrimental effects caused by MDMA should focus on the compounds that have the healing properties towards the abnormal neurotransmitter regulations and the damaged neurons. Current understanding of the MDMA mechanism of action arises from its effects on the psychological changes and dependence. Psychological changes are explained as the euphoria, sharpened sensory perception, an increase in social performance and empathy, and greater tolerance of the feelings (Kalant, 2001). However, MDMA dependence is still less understood, but it has been reported to be different from other drugs or alcohol (Degenhardt, Bruno, & Topp, 2010).

However, because of its history and neurotoxic potential, MDMA may never achieve clinical and/or societal acceptance. Perhaps the true potential of MDMA lies in its use as a lead structure for the development of safer and more efficacious alternatives. In contrast, recent clinical studies assessing the therapeutic potential of MDMA for treating PTSD are carefully controlled and well documented.220,221,222 First, patients are screened for medical conditions, including various neuropsychiatric disorders, that might exclude them from the study. Next, they are assessed at baseline using the Clinician-Administered PTSD Scale (CAPS).

The Siren Song of Serotonin

Even substances we consider completely benign and healthful, such as water, can become neurotoxic under particular circumstances (e.g. drinking 2 gallons in a single hour). Most of the evidence on MDMA neurotoxicity comes from either animal studies or correlational research, which looks at whether there is an association between two variables. In animal studies, MDMA has consistently shown to be toxic to serotonin structures. This has been observed in every animal tested, and while some animals recover normal serotonin function over time, many suffer lasting effects (Curran, 2000).

Do antidepressants or 5-HTP prevent MDMA-induced neurotoxicity?

Ecstasy, which has been a mainstay on the party scene since the early 1990s, is now one of the most commonly used illegal drugs. In fact, over 18 million Americans have reported using MDMA at least once in their lifetime (SAMHSA, 2017). Since this drug has become so widespread, it is important from an individual and public health standpoint to understand both the short- and long-term effects of its use. This article will explore these issues, as well as providing resources for safer ecstasy consumption. As reviewed above, MDMA, at the very mdma and the brain: is ecstasy neurotoxic least, causes severe deficits in different markers of the serotonergic neurotransmitter system in rodents, non-human primates and humans 24,26,101,102 and causes long-lasting cognitive and behavioral problems 48,52,197 and therefore fulfills the definition of a neurotoxicant compound provided by the NINDS.

Self-medicating with MDMA poses significant potential dangers, including physical and psychological harm. MDMA misuse can deplete serotonin levels, leading to negative effects on mood, memory, and thinking ability. In the experiments in rodents, group differences in SERT densities were analyzed using multivariate ANOVA, with SERT density in all assessed brain regions as dependent variables and age and treatment as independent variables, followed by Bonferroni post-hoc tests when appropriate. Main age, treatment and age-BY-treatment interactions effects were further analyzed using a Student t-test. The chance of a type I error (α) was set at 0.05 using 2-tailed tests of significance. These age-related effects most likely reflect differences in the maturational stage of the 5-HT projection fields at age-at-first exposure and enhanced outgrowth of the 5-HT system due to 5-HT’s neurotrophic effects.

Caffeine potentiates MDMA effect on dopaminergic system and inhibits its effect on serotonergic neurons. Exacerbation of MDMA-evoked oxidative stress may cause damage of serotonergic terminals. In contrast to the lack of research on DA involvement in the acute effects of MDMA, a number of pharmacological studies using various transporter inhibitors and receptor antagonists have provided information regarding the role of the serotonergic and noradrenergic systems in the subjective and physiological effects of MDMA in humans.