25N-NBOMe (2C-N-NBOMe, NBOMe-2C-N) is a derivative of the hallucinogen2C-N. The pharmacological properties of 25N-NBOMe have not been described in the scientific literature, but it is believed to act in a similar manner to related compounds such as 25I-NBOMe and 25C-NBOMe, which are potent agonists at the 5HT2Areceptor.[2][3] 25N-NBOMe has been sold as a street drug and has only been described in the literature in terms of identification by forensic analysis.[4][5]
Pharmacology
Pharmacodynamics
25N-NBOMe is a selective and highly potentagonist of the serotonin5-HT2 receptors.[6] Its affinities (Ki) are 0.144nM at the serotonin 5-HT2A receptor, 8.7nM at the serotonin 5-HT2B receptor, and 1.06nM at the serotonin 5-HT2C receptor.[6] In terms of affinity, the drug has approximately 7.4-fold selectivity for the serotonin 5-HT2A receptor over the serotonin 5-HT2C receptor and 60-fold selectivity for the 5-HT2A receptor over the serotonin 5-HT2B receptor.[6]
The EC50Tooltip half-maximal effective concentration (EmaxTooltip maximal efficacy) values of 25N-NBOMe are 0.51nM (87.9%) at the serotonin 5-HT2A receptor, 47nM (57.6%) at the serotonin 5-HT2B receptor, and 1.32nM (99.4%) at the serotonin 5-HT2C receptor.[6] Hence, 25N-NBOMe is a full agonist of the serotonin 5-HT2A and 5-HT2C receptors and a partial agonist of the serotonin 5-HT2B receptor.[6] In terms of functional activity, 25N-NBOMe had 2.6-fold selectivity for the serotonin 5-HT2A receptor over the serotonin 5-HT2C receptor and 92-fold selectivity for the serotonin 5-HT2A receptor over the serotonin 5-HT2C receptor.[6]
NBOMe and NBOHs are regularly sold as LSD in blotter papers,[9][17] which have a bitter taste and different safety profiles.[11][8] Despite high potency, recreational doses of LSD have only produced low incidents of acute toxicity.[8] Fatalities involved in NBOMe intoxication suggest that a significant number of individuals ingested the substance which they believed was LSD,[13] and researchers report that "users familiar with LSD may have a false sense of security when ingesting NBOMe inadvertently".[11] While most fatalities are due to the physical effects of the drug, there have also been reports of death due to self-harm and suicide under the influence of the substance.[18][19][11]
Given limited documentation of NBOMe consumption, the long-term effects of the substance remain unknown.[11] NBOMe compounds are not active orally,[a] and are usually taken sublingually.[21]: 3 When NBOMes are administered sublingually, numbness of the tongue and mouth followed by a metallic chemical taste was observed, and researchers describe this physical side effect as one of the main discriminants between NBOMe compounds and LSD.[22][23][24]
Many of the NBOMe compounds have high potency agonist activity at additional 5-HT receptors and prolonged activation of 5-HT2B can cause cardiac valvulopathy in high doses and chronic use.[9][14] 5-HT2B receptors have been strongly implicated in causing drug-induced valvular heart disease.[25][26][27] The high affinity of NBOMe compounds for adrenergic α1 receptor has been reported to contribute to the stimulant-type cardiovascular effects.[14]
In vitro studies, 25C-NBOMe has been shown to exhibit cytotoxicity on neuronal cell lines SH-SY5Y, PC12, and SN471, and the compound was more potent than methamphetamine at reducing the visibility of the respective cells; the neurotoxicity of the compound involves activation of MAPK/ERK cascade and inhibition of Akt/PKB signaling pathway.[10] 25C-NBOMe, including the other derivative 25D-NBOMe, reduced the visibility of cardiomyocytes H9c2 cells, and both substances downregulated expression level of p21 (CDC24/RAC)-activated kinase 1 (PAK1), an enzyme with documented cardiac protective effects.[10]
Preliminary studies on 25C-NBOMe have shown that the substance is toxic to development, heart health, and brain health in zebrafish, rats, and Artemia salina, a common organism for studying potential drug effects on humans, but more research is needed on the topic, the dosages, and if the toxicology results apply to humans. Researchers of the study also recommended further investigation of the drug's potential in damaging pregnant women and their fetus due to the substance's damaging effects to development.[28][29]
The Riksdag added 25N-NBOMe to Narcotic Drugs Punishments Act under swedish schedule I ("substances, plant materials and fungi which normally do not have medical use") as of January 16, 2015, published by Medical Products Agency (MPA) in regulation LVFS 2014:11 listed as 25N-NBOMe, and 2-(2,5-dimetoxi-4-nitrofenyl)-N-(2-metoxibensyl)etanamin.[32]
^The potency of N-benzylphenethylamines via buccal, sublingual, or nasal absorption is 50-100 greater (by weight) than oral route compared to the parent 2C-x compounds.[20] Researchers hypothesize the low oral metabolic stability of N-benzylphenethylamines is likely causing the low bioavailability on the oral route, although the metabolic profile of this compounds remains unpredictable; therefore researchers state that the fatalities linked to these substances may partly be explained by differences in the metabolism between individuals.[20]
^Hansen M (2010-12-16). Design and Synthesis of Selective Serotonin Receptor Agonists for Positron Emission Tomography Imaging of the Brain (Ph.D. thesis). University of Copenhagen. doi:10.13140/RG.2.2.33671.14245.
^Uchiyama N, Shimokawa Y, Matsuda S, Kawamura M, Kikura-Hanajiri R, Goda Y (2014). "Two new synthetic cannabinoids, AM-2201 benzimidazole analog (FUBIMINA) and (4-methylpiperazin-1-yl)(1-pentyl-1H-indol-3-yl)methanone (MEPIRAPIM), and three phenethylamine derivatives, 25H-NBOMe 3,4,5-trimethoxybenzyl analog, 25B-NBOMe, and 2C-N-NBOMe, identified in illegal products". Forensic Toxicology. 32 (1): 105–115. doi:10.1007/s11419-013-0217-2. S2CID32599561.
^Seo JY, Hur KH, Ko YH, Kim K, Lee BR, Kim YJ, Kim SK, Kim SE, Lee YS, Kim HC, Lee SY, Jang CG (October 2019). "A novel designer drug, 25N-NBOMe, exhibits abuse potential via the dopaminergic system in rodents". Brain Res Bull. 152: 19–26. doi:10.1016/j.brainresbull.2019.07.002. PMID31279579.
^ abcdeJolanta Z, Monika K, and Piotr A (26 February 2020). "NBOMes–Highly Potent and Toxic Alternatives of LSD". Frontiers in Neuroscience. 14: 78. doi:10.3389/fnins.2020.00078. PMC7054380. PMID32174803. Recently, a new class of psychedelic compounds named NBOMe (or 25X-NBOMe) has appeared on the illegal drug market. NBOMes are analogs of the 2C family of phenethylamine drugs, originally synthesized by Alexander Shulgin, that contain a N-(2-methoxy)benzyl substituent. The most frequently reported drugs from this group are 25I-NBOMe, 25B-NBOMe, and 25C-NBOMe. NBOMe compounds are ultrapotent and highly efficacious agonists of serotonin 5-HT2A and 5-HT2C receptors (Ki values in low nanomolar range) with more than 1000-fold selectivity for 5-HT2A compared with 5-HT1A. They display higher affinity for 5-HT2A receptors than their 2C counterparts and have markedly lower affinity, potency, and efficacy at the 5-HT2B receptor compared to 5-HT2A or 5-HT2C.
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