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Fernando Remião

17 papers in the library · 215 citations · publishing 2004-2025

Papers

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Toxicodynamic insights of 2C and NBOMe drugs - Is there abuse potential?

Toxicology Reports June 1, 2025 Eva Gil-Martins, Daniel José Barbosa, Fernanda Borges et al. 2 citations

Drug use represents a prevalent and multifaceted societal problem, with profound implications for public health, social welfare, and economic stability. To circumvent strict international drug control regulations, there is a growing trend in the development and market introduction of novel psychoactive substances (NPS), encompassing a wide range of compounds with psychoactive properties. This...

DOI: 10.1016/j.toxrep.2025.101890 (opens in new tab) Full text (opens in new tab) Abuse potential New psychoactive substances Psychedelic phenethylamines

The role of mitochondrial dysfunction and calcium dysregulation in 2C-I and 25I-NBOMe-induced neurotoxicity.

Chemico-Biological Interactions April 25, 2025 Eva Gil-Martins, Fernando Cagide, Ana Borer et al. 4 citations

New psychoactive substances (NPS) are designed to evade legal regulation while mimicking the effects of classic illicit drugs such as 3,4-methylenedioxymethamphetamine (MDMA). This category includes phenethylamine derivatives, such as the psychedelic 2C and NBOMe drugs. Given the lack of data regarding the toxicological profile of these substances, the goal of this study was to evaluate the...

DOI: 10.1016/j.cbi.2025.111425 (opens in new tab) Full text (opens in new tab) 2c drugs Nbome drugs New psychoactive substances Sh-sy5y cells +5

Sublethal Concentrations of 2C-I and 25I-NBOMe Designer Drugs Impact Caenorhabditis elegans Development and Reproductive Behavior.

International Journal of Molecular Sciences March 26, 2025 Eva Gil-Martins, Daniel José Barbosa, Fernando Cagide et al.

Sublethal Concentrations of 2C-I and 25I-NBOMe Designer Drugs Impact Caenorhabditis elegans Development and Reproductive Behavior.

DOI: 10.3390/ijms26073039 (opens in new tab) Full text (opens in new tab) Designer drugs C. elegans Biological effects

Mechanistic Insights into the Neurotoxicity of 2,5-Dimethoxyphenethylamines (2C) and Corresponding N-(2-methoxybenzyl)phenethylamine (NBOMe) Drugs.

Journal of Xenobiotics June 5, 2024 Eva Gil-Martins, Fernando Cagide-Fagín, Daniel Martins et al. 2 citations

Substituted phenethylamines including 2C (2,5-dimethoxyphenethylamines) and NBOMe (N-(2-methoxybenzyl)phenethylamines) drugs are potent psychoactive substances with little to no knowledge available on their toxicity. In the present in vitro study, we explored the mechanisms underlying the neurotoxicity of six substituted phenethylamines: 2C-T-2, 2C-T-4, 2C-T-7 and their corresponding NBOMes....

DOI: 10.3390/jox14020044 (opens in new tab) Full text (opens in new tab) 2c drugs Nbome drugs New psychoactive substances Substituted phenethylamines +17

Unraveling the In Vitro Toxicity Profile of Psychedelic 2C Phenethylamines and Their N-Benzylphenethylamine (NBOMe) Analogues

Pharmaceuticals August 15, 2023 Daniel Martins, Eva Gil-Martins, Fernando Cagide et al. 13 citations

Mescaline derivative (2C phenethylamines) drugs have been modified by the introduction of a N-2-methoxybenzyl group to originate a new series of compounds with recognized and potent psychedelic effects, the NBOMe-drugs. Although they are prevalent in unregulated drug markets, their toxicity profile is still poorly understood, despite several reports highlighting cases of acute intoxication,...

DOI: 10.3390/ph16081158 (opens in new tab) 2c drugs Hepg2 cells Nbome drugs Sh-sy5y cells +14

Mechanisms underlying the hepatotoxic effects of ecstasy.

Current Pharmaceutical Biotechnology August 1, 2010 Márcia Carvalho, Helena Pontes, Fernando Remião et al.

3,4-Methylenedioxymethamphetamine (MDMA or ecstasy) is a worldwide illegally used amphetamine-derived designer drug known to be hepatotoxic to humans. Jaundice, hepatomegaly, centrilobular necrosis, hepatitis and fibrosis represent some of the adverse effects caused by MDMA in the liver. Although there is irrefutable evidence of MDMA-induced hepatocellular damage, the mechanisms responsible for...

DOI: 10.2174/138920110791591535 (opens in new tab) Full text (opens in new tab) Liver Animals Humans N-methyl-3,4-methylenedioxyamphetamine +2

Metabolic interactions between ethanol and MDMA in primary cultured rat hepatocytes.

Toxicology April 11, 2010 Helena Pontes, Paula Guedes de Pinho, Eduarda Fernandes et al.

3,4-Methylenedioxymethamphetamine (MDMA; ecstasy), a drug of abuse commonly consumed at rave parties, is often taken in a polydrug abuse scenario, ethanol being one of the most associated drugs. Both MDMA and ethanol are mainly metabolized in the liver with formation of toxic metabolites. Our working hypothesis is that ethanol can modify the metabolism of MDMA through the cytochrome P450...

Molecular and Cellular Mechanisms of Ecstasy-Induced Neurotoxicity: An Overview

Molecular Neurobiology June 1, 2009 João Paulo Capela, Helena Carmo, Fernando Remião et al.

“Ecstasy” [(±)-3,4-methylenedioxymethamphetamine, MDMA, XTC, X, E] is a psychoactive recreational hallucinogenic substance and a major worldwide drug of abuse. Several reports raised the concern that MDMA has the ability to induce neurotoxic effects both in laboratory animals and humans. Despite more than two decades of research, the mechanisms by which MDMA is neurotoxic are still to be fully...

Synergistic toxicity of ethanol and MDMA towards primary cultured rat hepatocytes.

Toxicology December 5, 2008 Helena Pontes, Carla Sousa, Renata Silva et al.

Ethanol is frequently consumed along with 3,4-methylenedioxymethamphetamine (MDMA; ecstasy). Since both compounds are hepatotoxic and are metabolized in the liver, an increased deleterious interaction resulting from the concomitant use of these two drugs seems plausible. Another important feature of MDMA-induced toxicity is hyperthermia, an effect known to be potentiated after continuous...

Ecstasy induces apoptosis via 5-HT(2A)-receptor stimulation in cortical neurons.

Neurotoxicology July 2007 João Paulo Capela, Eduarda Fernandes, Fernando Remião et al.

3,4-Methylenedioxymethamphetamine (MDMA or "Ecstasy") is a psychoactive and hallucinogenic drug of abuse. MDMA has been shown to produce neurotoxicity both in animals and humans. MDMA and other amphetamines induce serotonergic and dopaminergic terminal neurotoxicity and also neurodegeneration in areas including the cortex, hippocampus, striatum and thalamus. Herein, we investigated the...

Neurotoxicity mechanisms of thioether ecstasy metabolites.

Neuroscience June 8, 2007 J P Capela, Carla Macedo, P S Branco et al.

3,4-Methylenedioxymethamphetamine (MDMA or "ecstasy"), is a widely abused, psychoactive recreational drug that is known to induce neurotoxic effects. Human and rat hepatic metabolism of MDMA involves N-demethylation to 3,4-methylenedioxyamphetamine (MDA), which is also a drug of abuse. MDMA and MDA are O-demethylenated to N-methyl-alpha-methyldopamine (N-Me-alpha-MeDA) and alpha-methyldopamine...

Neurotoxicity of Ecstasy metabolites in rat cortical neurons, and influence of hyperthermia.

Journal of Pharmacology and Experimental Therapeutics January 2006 João Paulo Capela, Andreas Meisel, Artur Reis Abreu et al.

3,4-Methylenedioxymethamphetamine (MDMA or "Ecstasy") is a widely abused, psychoactive recreational drug. There is growing evidence that the MDMA neurotoxic profile may be highly dependent on both its hepatic metabolism and body temperature. Metabolism of MDMA involves N-demethylation to 3,4-methylenedioxyamphetamine (MDA), which is also a drug of abuse. MDMA and MDA are O-demethylenated to...

Metabolic pathways of 4-bromo-2,5-dimethoxyphenethylamine (2C-B): analysis of phase I metabolism with hepatocytes of six species including human.

Toxicology January 5, 2005 Helena Carmo, Jan G Hengstler, Douwe De Boer et al. 85 citations

4-Bromo-2,5-dimethoxyphenethylamine (2C-B) is a psychoactive designer drug of abuse that is sold under the street names "Venus", "Bromo", "Erox", "XTC" or "Nexus". Concern has been raised because only little is known about its toxicity and metabolism in humans. In the present study we incubated 2C-B with human, monkey, dog, rabbit, rat and mouse hepatocytes to identify the metabolites formed...

DOI: 10.1016/j.tox.2004.07.004 (opens in new tab) Full text (opens in new tab) Drug metabolism Biotransformation Drug breakdown Drug processing +23

Metabolism of the designer drug 4-bromo-2,5-dimethoxyphenethylamine (2C-B) in mice, after acute administration.

Journal of Chromatography B November 25, 2004 Helena Carmo, Douwe De Boer, Fernando Remião et al. 32 citations

4-Bromo-2,5-dimethoxyphenethylamine (2C-B) is a psychoactive drug of abuse often sold under the general street name "Ecstasy". Recent reports on the abuse of 2C-B and analogues denote the lack of knowledge on this drug metabolism. In the present study, we investigated the metabolic profile of 2C-B in the mouse and found unchanged 2C-B and several metabolites, which could be identified by GC/MS...

DOI: 10.1016/j.jchromb.2004.08.026 (opens in new tab) Full text (opens in new tab) Drug metabolism Forensic toxicology Psychoactive drugs Animal studies

The toxicity of N-methyl-alpha-methyldopamine to freshly isolated rat hepatocytes is prevented by ascorbic acid and N-acetylcysteine.

Toxicology August 5, 2004 Márcia Carvalho, Fernando Remião, Nuno Milhazes et al.

In the past decade, clinical evidence has increasingly shown that the liver is a target organ for 3,4-methylenedioxymethamphetamine (MDMA, "ecstasy") toxicity. The aims of the present in vitro study were: (1) to evaluate and compare the hepatotoxic effects of MDMA and one of its main metabolites, N-methyl-alpha-methyldopamine (N-Me-alpha-MeDA) and (2) to investigate the ability of antioxidants,...

Metabolism Is Required for the Expression of Ecstasy-Induced Cardiotoxicity in Vitro

Chemical Research in Toxicology April 27, 2004 Márcia Carvalho, Fernando Remião, Nuno Milhazes et al. 77 citations

Cardiovascular complications associated with 3,4-methylenedioxymethamphetamine (MDMA, ecstasy) abuse have increasingly been reported. The indirect effect of MDMA mediated by a sustained high level of circulating biogenic amines may contribute to the cardiotoxic effects, but other factors, like the direct toxic effects of MDMA and its metabolites in cardiac cells, remain to be investigated....

DOI: 10.1021/tx049960f (opens in new tab) MDMA Ecstasy Glutathione reductase Pharmacology +6

Hepatotoxicity of 3,4-methylenedioxyamphetamine and alpha-methyldopamine in isolated rat hepatocytes: formation of glutathione conjugates.

Archives of Toxicology January 2004 Márcia Carvalho, Nuno Milhazes, Fernando Remião et al.

The amphetamine designer drugs 3,4-methylenedioxymethamphetamine (MDMA or "ecstasy") and its N-demethylated analogue 3,4-methylenedioxyamphetamine (MDA or "love") have been extensively used as recreational drugs of abuse. MDA itself is a main MDMA metabolite. MDMA abuse in humans has been associated with numerous reports of hepatocellular damage. Although MDMA undergoes extensive hepatic...