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https://www.readbyqxmd.com/read/28532112/preparations-and-doxorubicin-controlled-release-of-amino-acid-based-redox-ph-dual-responsive-nanomicelles
#1
Yuanyuan Ding, Liping Zhang, Gang Shi, Xinxin Sang, Caihua Ni
Terpolymers of poly (Lysine-co-N, N-Bis (acryloyl) cystamine-co-β-Phenethylamine) (PLBP) were synthesized in one-pot by Michael addition terpolymerization. The terpolymers self-assembled into nano-sized spherical micelles (84-123nm) with narrow distributions. The surface charge of the nanomicelles (NMs) was depended on solution's pH and showed negative values under physiological conditions (pH7.4), which was beneficial for long circulation without non-specific protein adsorption. Doxorubicin (DOX) was effectively loaded into the NMs for controlled release...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28527345/a-literature-review-of-blood-concentrations-of-new-psychoactive-substances-classified-as-phenethylamines-aminoindanes-arylalkylamines-arylcyclohexylamines-and-indolalkylamines
#2
REVIEW
Ritva Karinen, Gudrun Høiseth
Interpretation of blood concentrations of new psychoactive substances (NPS) requires comparison of the results to previously published case reports; as only a few experimental studies for these substances exist. A large number of articles representing single or multiple cases have been published for a great number of substances, making a unified overview difficult. In this review we have collected all published blood concentrations from the NPS groups classified as phenethylamines, aminoindanes, arylalkylamines, arylcyclohexylamines, and indolalkylamines, and also included unpublished results for MPA, MXE, 4-FMA, 4-FA and 4-MA analyzed in our laboratory...
March 21, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28506818/measuring-inhibition-of-monoamine-reuptake-transporters-by-new-psychoactive-substances-nps-in-real-time-using-a-high-throughput-fluorescence-based-assay
#3
Anne Zwartsen, Anouk H A Verboven, Regina G D M van Kleef, Fiona M J Wijnolts, Remco H S Westerink, Laura Hondebrink
The prevalence and use of new psychoactive substances (NPS) is increasing and currently over 600 NPS exist. Many illicit drugs and NPS increase brain monoamine levels by inhibition and/or reversal of monoamine reuptake transporters (DAT, NET and SERT). This is often investigated using labor-intensive, radiometric endpoint measurements. We investigated the applicability of a novel and innovative assay that is based on a fluorescent monoamine mimicking substrate. DAT, NET or SERT-expressing human embryonic kidney (HEK293) cells were exposed to common drugs (cocaine, dl-amphetamine or MDMA), NPS (4-fluoroamphetamine, PMMA, α-PVP, 5-APB, 2C-B, 25B-NBOMe, 25I-NBOMe or methoxetamine) or the antidepressant fluoxetine...
May 12, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28485987/assessing-self-reported-use-of-new-psychoactive-substances-the-impact-of-gate-questions
#4
Joseph J Palamar, Patricia Acosta, Fermín Fernández Calderón, Scott Sherman, Charles M Cleland
BACKGROUND: New psychoactive substances (NPS) continue to emerge; however, few surveys of substance use ask about NPS use. Research is needed to determine how to most effectively query use of NPS and other uncommon drugs. OBJECTIVE: To determine whether prevalence of self-reported lifetime and past-year use differs depending on whether or not queries about NPS use are preceded by "gate questions." Gate questions utilize skip-logic, such that only a "yes" response to the use of specific drug class is followed by more extensive queries of drug use in that drug class...
May 9, 2017: American Journal of Drug and Alcohol Abuse
https://www.readbyqxmd.com/read/28485498/plasmonic-nanoparticles-decorated-diatomite-biosilica-extending-the-horizon-of-on-chip-chromatography-and-label-free-biosensing
#5
Xianming Kong, Erwen Li, Kenny Squire, Ye Liu, Bo Wu, Li-Jing Cheng, Alan X Wang
Diatomite consists of fossilized remains of ancient diatoms and is a type of naturally abundant photonic crystal biosilica with multiple unique physical and chemical functionalities. In this paper, we explored the fluidic properties of diatomite as the matrix for on-chip chromatography and, simultaneously, the photonic crystal effects to enhance the plasmonic resonances of metallic nanoparticles for surface-enhanced Raman scattering (SERS) biosensing. The plasmonic nanoparticle-decorated diatomite biosilica provides a lab-on-a-chip capability to separate and detect small molecules from mixture samples with ultra-high detection sensitivity down to 1 ppm...
May 9, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28481522/rapid-hydrogen-deuterium-exchange-in-liquid-droplets
#6
Erik T Jansson, Yin-Hung Lai, Juan G Santiago, Richard N Zare
The rate of hydrogen-deuterium exchange (HDX) in aqueous droplets of phenethylamine has been determined with submillisecond temporal resolution by mass spectrometry using nanoelectrospray ionization with a theta-capillary. The average speed of the microdroplets is measured using microparticle image velocimetry. The droplet travel time is varied from 20 to 320 μs by changing the distance between the emitter and the heated inlet to the mass spectrometer and the voltage applied to the emitter source. The droplets were found to accelerate by ∼30% during their observable travel time...
May 12, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28472697/occurrence-and-fate-of-illicit-drugs-and-pharmaceuticals-in-wastewater-from-two-wastewater-treatment-plants-in-costa-rica
#7
Ana Causanilles, Clemens Ruepert, María Ibáñez, Erik Emke, Félix Hernández, Pim de Voogt
Chemical analysis of raw wastewater in order to assess the presence of biological markers entering a wastewater treatment plant can provide objective information about the health and lifestyle of the population connected to the sewer system. This work was performed in a tropical country of Central America, Costa Rica, with the aim of extending this knowledge to new world regions. This work is the first to report wastewater-based epidemiological data on the use of illicit drugs in this region of the world. Composite wastewater samples from the influents of two different wastewater treatment facilities and surface water samples from surrounding areas were collected applying the best practice protocol and analysed to investigate the occurrence and fate of selected illicit drugs of abuse and pharmaceuticals...
May 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28472358/metabolic-profile-determination-of-nbome-compounds-using-human-liver-microsomes-and-comparison-with-findings-in-authentic-human-blood-and-urine
#8
Keith-Dane H Temporal, Karen S Scott, Amanda L A Mohr, Barry K Logan
The emergence of novel psychoactive substances (NPS) such as hallucinogenic NBOMes (N-methoxybenzyl derivatives of 2C phenethylamines) in the past few years into the recreational drug market has introduced various challenges in forensic analytical toxicology in regard to adequate and timely detection of these compounds. This is especially true in samples from individuals who have experienced severe and fatal intoxications. The aim of this research was to identify the major Phase I metabolites of selected NBOMe compounds to generate a predicted human metabolic pathway of these substances...
May 3, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/28444659/new-psychoactive-substances-nps-a-challenge-for-the-addiction-treatment-services
#9
Norbert Scherbaum, F Schifano, Udo Bonnet
Over the last few years, hundreds of new psychoactive substances (NPS) have been identified in Europe. Apart from some herbal compounds, NPS mainly include synthetic cannabinoids and a range of new synthetic stimulants (e. g., cathinones). Synthetic NPS are often developed whilst modifying the basic chemical (e. g., phenethylamine or tryptamine) structure. Although the pharmacology and toxicology of most NPS are hardly known, they are being offered, especially online, as "bath salts," as "incense mixtures," or under other misleading labels...
May 2017: Pharmacopsychiatry
https://www.readbyqxmd.com/read/28404688/brain-disposition-of-cis-para-methyl-4-methylaminorex-cis-4-4-dmar-and-its-potential-metabolites-after-acute-and-chronic-treatment-in-rats-correlation-with-central-behavioral-effects
#10
Jacopo Lucchetti, Claudio Marcello Marzo, Alice Passoni, Angelo Di Clemente, Federico Moro, Renzo Bagnati, Marco Gobbi, Luigi Cervo
Para-methyl-4-methylaminorex (4,4'-DMAR) is a phenethylamine derivative with psychostimulant activity, whose abuse has been associated with several deaths and a wide range of adverse effects. We recently validated an HPLC-MS/MS method to measure the compound's concentrations in plasma, and applied it to describe the pharmacokinetic properties after single dose in rats. In this study we investigated the brain disposition and metabolism of cis-4,4'-DMAR after intraperitoneal injection, and its central behavioral effects...
April 12, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28401524/chemistry-and-structure-activity-relationships-of-psychedelics
#11
David E Nichols
This chapter will summarize structure-activity relationships (SAR) that are known for the classic serotonergic hallucinogens (aka psychedelics), focusing on the three chemical types: tryptamines, ergolines, and phenethylamines. In the brain, the serotonin 5-HT2A receptor plays a key role in regulation of cortical function and cognition, and also appears to be the principal target for hallucinogenic/psychedelic drugs such as LSD. It is one of the most extensively studied of the 14 known types of serotonin receptors...
March 26, 2017: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/28376067/seizures-systemic-inflammatory-response-and-rhabdomyolysis-associated-with-laboratory-confirmed-2c-i-and-25-i-exposure
#12
Stephen L Thornton, Sarah Hoehn, Roy R Gerona
The 2C drugs are hallucinogenic phenethylamines. They and their n-benzyloxymethyl analogs have become popular as "legal highs," and significant toxicity has been attributed to their use. We report on a case of seizures, systemic inflammatory response, and rhabdomyolysis associated with laboratory-confirmed 4-iodo-2,5-dimethoxyphenethylamine and 4-iodo-2,5-dimethoxy-N-(2-methoxybenzyl) phenethylamine exposure. A 17-year-old male teenager developed seizures after taking "2 strips of acid." The seizures resolved with midazolam, but he became apneic and was intubated...
April 4, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28329723/analysis-of-synthetic-phenethylamine-street-drugs-using-direct-sample-analysis-coupled-to-accurate-mass-time-of-flight-mass-spectrometry
#13
Maura K McGonigal, Joshua A Wilhide, Philip B Smith, Noelle M Elliott, Frank L Dorman
Serious health complications and fatal overdoses have brought phenethylamine, otherwise known as 2C, drug abuse to the public's attention. These compounds are 2C-X series analogs of mescaline. The name "2C" results from the two carbons in the ethyl chain. The substituents on these emerging drugs are constantly changed in order to avoid listing as controlled substances. These synthetic drugs are marketed as having affects similar to LSD and MDMA and are typically consumed sublingually via blotter paper. Twenty-six commercially available standards were analyzed using a direct sample analysis technique coupled to accurate mass time of flight mass spectrometry...
March 8, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28294505/metal-free-intermolecular-aminoarylation-of-alkynes
#14
Pauline T G Rabet, Scott Boyd, Michael F Greaney
A metal-free aminoarylation of internal alkynes is described, yielding tetrasubstituted enaminoates. The transformation proceeds in good to excellent yields through a tandem conjugate addition/Smiles rearrangement involving aryl and heteroaryl sulfonamides. Substrate scope is very broad under simple, user-friendly conditions, and the reaction can be used to easily access biologically active phenethylamine derivatives.
April 3, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28199890/gc-ms-gc-ms-ms-and-gc-ir-differentiation-of-desoxy-cathinone-derivatives-cyclic-tertiary-amines-related-to-mdpv
#15
Younis Abiedalla, Jack DeRuiter, C Randall Clark
The desoxy phenethylamine analogues in this study represent a combination of alkyl side-chain and cyclic amines (azetidine, pyrrolidine, piperidine and azepane) to yield a set of molecules of identical elemental composition as well as major mass spectral fragment ions (base peaks) of identical elemental composition. These desoxy phenethylamine analogues of the aminoketone designer drug, 3,4-methylenedioxy-pyrrovalerone (MDPV) related to the natural product cathinone were prepared from piperonal (3,4-methylenedioxybenzaldehyde) via the intermediate precursor ketones...
March 24, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28168149/roaming-mediated-ch2nh-elimination-from-the-ionization-of-aromatic-ethylamines
#16
Mengxing Zhang, Huijun Guo, Lidong Zhang
The ionization of aromatic ethylamines by photons or electrons leads to elimination of CH2NH fragments, supposedly deriving from the McLafferty rearrangement involving intramolecular γ-hydrogen transfer. Using tryptamine and phenethylamine as examples, the results reported here suggest that the McLafferty mechanism is inadequate for interpreting the observations of CH2NH elimination due to much higher calculated appearance energy than experimentally measured values. Furthermore, by considering the roaming-mediated effect, the calculated appearance energy for the elimination of CH2NH fragments is reduced and matches well with the experimental results and verifies the existence of roaming-mediated effect...
February 2017: ChemistryOpen
https://www.readbyqxmd.com/read/28140394/sticking-together-inter-species-aggregation-of-bacteria-isolated-from-iron-snow-is-controlled-by-chemical-signaling
#17
Jiro F Mori, Nico Ueberschaar, Shipeng Lu, Rebecca E Cooper, Georg Pohnert, Kirsten Küsel
Marine and lake snow is a continuous shower of mixed organic and inorganic aggregates falling from the upper water where primary production is substantial. These pelagic aggregates provide a niche for microbes that can exploit these physical structures and resources for growth, thus are local hot spots for microbial activity. However, processes underlying their formation remain unknown. Here, we investigated the role of chemical signaling between two co-occurring bacteria that each make up more than 10% of the community in iron-rich lakes aggregates (iron snow)...
May 2017: ISME Journal
https://www.readbyqxmd.com/read/28139893/chemometrics-assisted-chromatographic-fingerprinting-an-illicit-methamphetamine-case-study
#18
Nafiseh Shekari, Maryam Vosough, Kourosh Tabar Heidar
The volatile chemical constituents in complex mixtures can be analyzed using gas chromatography with mass spectrometry. This analysis allows the tentative identification of diverse impurities of an illicit methamphetamine sample. The acquired two-dimensional data of liquid-liquid extraction was resolved by multivariate curve resolution alternating curve resolution to elucidate the embedded peaks effectively. This is the first report on the application of a curve resolution approach for chromatogram fingerprinting to identify particularly the embedded impurities of a drug of abuse...
March 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28133938/characterisation-of-hallucinogenic-phenethylamines-using-high-resolution-mass-spectrometry-for-non-targeted-screening-purposes
#19
Daniel Pasin, Adam Cawley, Sergei Bidny, Shanlin Fu
Hallucinogenic phenethylamines such as 2,5-dimethoxyphenethylamines (2C-X) and their N-(2-methoxybenzyl) derivatives (25X-NBOMe) has seen an increase in novel analogues in recent years. These rapidly changing analogues make it difficult for laboratories to rely on traditional targeted screening methods to detect unknown new psychoactive substances (NPS). In this study, twelve 2C-X, six 2,5-dimethoxyamphetamines (DOX) and fourteen 25X-NBOMe derivatives, including two deuterated derivatives (2C-B-d6 and 25I-NBOMe-d9 ), were analysed using ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC-QTOF-MS)...
January 29, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28130905/characterization-of-complexes-between-phenethylamine-enantiomers-and-%C3%AE-cyclodextrin-derivatives-by-capillary-electrophoresis-determination-of-binding-constants-and-complex-mobilities
#20
Joachim Wahl, Takayuki Furuishi, Etsuo Yonemochi, Lorenz Meinel, Ulrike Holzgrabe
To optimize chiral separation conditions and to improve the knowledge of enantioseparation, it is important to know the binding constants K between analytes and cyclodextrins and the electrophoretic mobilities of the temporarily formed analyte-cyclodextrin-complexes. K values for complexes between eight phenethylamine enantiomers, namely ephedrine, pseudoephedrine, methylephedrine and norephedrine, and four different β-cyclodextrin derivatives were determined by affinity capillary electrophoresis. The binding constants were calculated from the electrophoretic mobility values of the phenethylamine enantiomers at increasing concentrations of cyclodextrins in running buffer...
April 2017: Electrophoresis
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