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https://www.readbyqxmd.com/read/28614180/cocaine-inhibits-leptin-induced-increase-of-the-cocaine-and-amphetamine-regulated-transcript-peptide-in-the-nucleus-accumbens-in-rats
#1
Bo Ram Cho, Hyung Shin Yoon, Wha Young Kim, Paul Vezina, Jeong-Hoon Kim
Two well-known appetite-regulatory peptides, leptin and cocaine- and amphetamine-regulated transcript (CART), are known to be involved in the brain rewarding pathway. However, it is not yet known how they interact in the nucleus accumbens, an important region mediating the rewarding effects of drugs of abuse. Using the immunoassay method, we found that a microinjection of leptin into the nucleus accumbens core induces an immediate and transient increase of the CART peptide in this site, whereas these effects were inhibited by cocaine...
June 13, 2017: Neuroreport
https://www.readbyqxmd.com/read/28612521/could-modafinil-prevent-psychostimulant-addiction-an-experimental-study-in-rats
#2
Verônica Tironi Dias, Luciana Taschetto Vey, Higor Zuquetto Rosa, Lívia Ferraz D'avila, Raquel Cristine Silva Barcelos, Marilise Escobar Burger
Addiction is a serious health problem which leads to general social impairment. The period of adolescence plays a significant role in drug abuse liability. Psychostimulants, such as modafinil (MOD), are majorly used by teenagers seeking improvements in cognition, which contributes to its indiscriminate use. The present study aimed to investigate the influence of MOD (64 mg/kg by gavage, once a day) treatment during adolescence (PND 28-42) on amphetamine (AMPH, 4 mg/kg i.p.) conditioned place preference (CPP) in early adulthood (PND 60)...
June 14, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28589520/role-of-mitochondria-in-methamphetamine-induced-dopaminergic-neurotoxicity-involvement-in-oxidative-stress-neuroinflammation-and-pro-apoptosis-a-review
#3
Eun-Joo Shin, Hai-Quyen Tran, Phuong-Tram Nguyen, Ji Hoon Jeong, Seung-Yeol Nah, Choon-Gon Jang, Toshitaka Nabeshima, Hyoung-Chun Kim
Methamphetamine (MA), an amphetamine-type psychostimulant, is associated with dopaminergic toxicity and has a high abuse potential. Numerous in vivo and in vitro studies have suggested that impaired mitochondria are critical in dopaminergic toxicity induced by MA. Mitochondria are important energy-producing organelles with dynamic nature. Evidence indicated that exposure to MA can disturb mitochondrial energetic metabolism by inhibiting the Krebs cycle and electron transport chain. Alterations in mitochondrial dynamic processes, including mitochondrial biogenesis, mitophagy, and fusion/fission, have recently been shown to contribute to dopaminergic toxicity induced by MA...
June 7, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28579487/intoxication-by-gamma-hydroxybutyrate-and-related-analogues-clinical-characteristics-and-comparison-between-pure-intoxication-and-that-combined-with-other-substances-of-abuse
#4
Òscar Miró, Miguel Galicia, Paul Dargan, Alison M Dines, Isabelle Giraudon, Fridtjof Heyerdahl, Knut E Hovda, Christopher Yates, David M Wood
OBJECTIVE: To study the profile of European gamma-hydroxybutyrate (GHB) and gammabutyrolactone (GBL) intoxication and analyse the differences in the clinical manifestations produced by intoxication by GHB/GBL alone and in combination with other substances of abuse. METHOD: We prospectively collected data on all the patients attended in the Emergency Departments (ED) of the centres participating in the Euro-DEN network over 12 months (October 2013 to September 2014) with a primary presenting complaint of drug intoxication (excluding ethanol alone) and registered the epidemiological and clinical data and outcomes...
June 1, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28579351/preclinical-abuse-liability-assessment-of-abt-126-an-agonist-at-the-%C3%AE-7-nicotinic-acetylcholine-receptor-nachr
#5
Thomas J Hudzik, Ana M Basso, James J Lynch, William M Bracken, Eric G Mohler, Kathy L Kohlhaas, Hongyu Xu, George Haig, Laura Gault
ABT-126 is a nicotinic acetylcholine receptor (nAChR) agonist that is selective for the α7 subtype of the receptor. nAChRs are thought to play a role in a variety of neurocognitive processes and have been a pharmacologic target for disorders with cognitive impairment, including schizophrenia and Alzheimer's disease. As part of the preclinical safety package for ABT-126, its potential for abuse was assessed. While the involvement of the α4β2 subtype of the nicotinic receptor in the addictive properties of nicotine has been demonstrated, the role of the α7 receptor has been studied much less extensively...
July 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28577420/reliability-of-point-of-collection-testing-devices-for-drugs-of-abuse-in-oral-fluid-a-systematic-review-and-meta-analysis
#6
REVIEW
Juliana Nichterwitz Scherer, Taís Regina Fiorentin, Bruna Tassi Borille, Graciela Pasa, Tanara Rosangela Vieira Sousa, Lisia von Diemen, Renata Pereira Limberger, Flavio Pechansky
Point-of-collection testing (POCT) devices for drugs of abuse are used to screen for the presence of psychoactive substances (PAS) in different types of settings and environments. However, these quick and advantageous tools also present disadvantages, including low-reliability measures in comparison to chromatographic assays. Therefore, this article presents a systematic review and meta-analysis of studies evaluating the reliability of measurements of PAS detection in oral fluid using POCT devices. The reliability measures for detection of the five most important drug classes - cocaine, amphetamines, benzodiazepines, cannabinoids and opioids, are reported...
May 13, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28573080/rapid-identification-of-psychoactive-drugs-in-drained-gastric-lavage-fluid-and-whole-blood-specimens-of-drug-overdose-patients-using-ambient-mass-spectrometry
#7
Chi-Wei Lee, Hung Su, You-Da Cai, Ming-Tsang Wu, Den-Chyang Wu, Jentaie Shiea
Psychoactive drug overdoses are life-threatening and require prompt and proper treatment in the emergency room to minimize morbidity and mortality. Prompt identification of the ingested psychoactive drugs is challenging, since witness recall is unreliable and patients' symptoms do not necessarily explain their loss of consciousness. Gas and liquid chromatography mass spectrometric analyses have been the traditionally employed methods to detect and identify abused substances; however, these techniques are time-consuming and labor-intensive...
2017: Mass Spectrometry
https://www.readbyqxmd.com/read/28560628/fate-of-selected-drugs-in-the-wastewater-treatment-plants-wwtps-for-domestic-sewage
#8
Agostina Chiavola, Pierpaolo Tedesco, Maria Rosaria Boni
The wide diffusion of Emerging Organic Micropollutants (EOMs) in the environment is receiving increasing attention due to their potential toxicological effects on living organisms. So far, the Wastewater Treatment Plants (WWTPs) have not been designed with the purpose to remove these contaminants; therefore, they can represent the major source of release into the environment both through the effluent and the wasted sludge. The fate of EOMs in the WWTPs is still not completely known; further investigations are therefore needed to assess if it is possible to exploit the existing treatment units to reduce EOM concentrations or which processes must be implemented to this purpose...
May 30, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28559209/short-post-weaning-social-isolation-induces-long-term-changes-in-the-dopaminergic-system-and-increases-susceptibility-to-psychostimulants-in-female-rats
#9
Carine Lampert, Danusa Mar Arcego, Natividade de Sá Couto-Pereira, Aline Dos Santos Vieira, Ana Paula Toniazzo, Rachel Krolow, Emily Garcia, Deusa Aparecida Vendite, Maria Elisa Calcagnotto, Carla Dalmaz
Childhood and adolescence are sensitive periods of development, marked by high brain maturation and plasticity. Exposure to early life stress, such as social isolation, is able to prompt changes in sensitive brain circuitries, essentially in the mesolimbic dopaminergic system and increase the risk for addictive behaviors later in life. Post-weaning social isolation can stimulate the consumption of rewarding substances, like drugs of abuse and palatable foods. However, most studies analyze long periods of social isolation and very little is known about the effects of a brief social isolation in a sensitive period of development and its association with palatable food on the reward system sensitization...
May 27, 2017: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/28551534/tracing-methamphetamine-and-amphetamine-sources-in-wastewater-and-receiving-waters-via-concentration-and-enantiomeric-profiling
#10
Zeqiong Xu, Peng Du, Kaiyang Li, Tingting Gao, Zhenglu Wang, Xiaofang Fu, Xiqing Li
Wastewater analysis is a promising approach to monitor illicit drug abuse of a community. However, drug use estimation via wastewater analysis may be biased by sources other than abuse. This is especially true for methamphetamine and amphetamine as their presence in wastewater may come from many sources, such as direct disposal or excretion following administration of prescription drugs. Here we traced methamphetamine and amphetamine sources via concentration and enantiomeric profiling of the two compounds from black market to receiving waters...
May 25, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28544816/analytical-characterization-of-three-cathinone-derivatives-4-mpd-4%C3%A2-f-php-and-bk-epdp-purchased-as-bulk-powder-from-online-vendors
#11
Orapan Apirakkan, Anca Frinculescu, Trevor Shine, Mark C Parkin, Agostino Cilibrizzi, Nunzianda Frascione, Vincenzo Abbate
Novel emerging drugs of abuse, also referred as new psychoactive substances (NPS), constitute an ever-changing mixture of chemical compounds designed to circumvent legislative controls by means of chemical modifications of previously banned recreational drugs. One of such class, synthetic cathinones, namely β-keto derivatives of amphetamines, has been largely abused over the past decade. A number of new synthetic cathinones are detected each year, either in bulk powders/crystals or in biological matrices. It is therefore important to continuously monitor the supply of new synthetic derivatives and promptly report them...
May 23, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28543168/a-new-tool-to-tackle-the-opioid-epidemic-description-utility-and-results-from-the-maine-diversion-alert-program
#12
Brian J Piper, Clare E Desrosiers, Harriet C Fisher, Kenneth L McCall, Stephanie D Nichols
STUDY OBJECTIVE: The opioid epidemic continues to impact the United States, and new strategies are needed to combat this epidemic. The objective of this study was to analyze 2015 drug arrest data from Maine's Diversion Alert program (diversionalert. org), compare arrest data between the first quarters of 2015 and 2016, and provide an analysis of the sex differences in the arrests as well as information about DA use. STUDY DESIGN: A population-based, descriptive study using data from the Maine Diversion Alert Program...
May 19, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28537688/prevalence-of-alcohol-and-other-drugs-in-injured-drivers-and-their-association-with-clinical-outcomes
#13
F Cittadini, N De Giovanni, L Caradonna, G Vetrugno, A Oliva, N Fucci, C Zuppi, V L Pascali, M Covino
OBJECTIVE: Driving under the influence of alcohol or drugs is a risk factor for motor vehicle accidents (MVAs). This issue has become an increasing concern for the governments of many European and North American countries, thereby encouraging the adoption of preventive policies. The aim of this study was to investigate the associations between major clinical outcomes and alcohol or drug abuse among drivers involved in MVAs who were referred to an Italian Emergency Department. PATIENTS AND METHODS: The study population consisted of consecutive injured drivers who were admitted to the Emergency Department following an MVA during a period of one year...
May 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28535758/hiv-prevalence-risky-behaviors-and-discrimination-experiences-among-transgender-women-in-cambodia-descriptive-findings-from-a-national-integrated-biological-and-behavioral-survey
#14
Siyan Yi, Chanrith Ngin, Sovannary Tuot, Pheak Chhoun, Srean Chhim, Khuondyla Pal, Phalkun Mun, Gitau Mburu
BACKGROUND: Transgender people are disproportionately affected by HIV. Despite their high vulnerability to HIV, lack of adequate epidemiological and surveillance data related to this population in many countries prevents provision of appropriate services. This paper summarizes descriptive findings from a national integrated biological and behavioral survey and discusses policy implications of the findings on HIV prevention among transgender women in Cambodia. METHODS: This cross-sectional study was conducted between December 2015 and February 2016...
May 23, 2017: BMC International Health and Human Rights
https://www.readbyqxmd.com/read/28527032/methylone-and-mdpv-activate-autophagy-in-human-dopaminergic-sh-sy5y-cells-a-new-insight-into-the-context-of-%C3%AE-keto-amphetamines-related-neurotoxicity
#15
Maria João Valente, Cristina Amaral, Georgina Correia-da-Silva, José Alberto Duarte, Maria de Lourdes Bastos, Félix Carvalho, Paula Guedes de Pinho, Márcia Carvalho
Autophagy has an essential role in neuronal homeostasis and its dysregulation has been recently linked to neurotoxic effects of a growing list of psychoactive drugs, including amphetamines. However, the role of autophagy in β-keto amphetamine (β-KA) designer drugs-induced neurotoxicity has hitherto not been investigated. In the present study, we show that two commonly abused cathinone derivatives, 3,4-methylenedioxymethcathinone (methylone) and 3,4-methylenedioxypyrovalerone (MDPV), elicit morphological changes consistent with autophagy and neurodegeneration, including formation of autophagic vacuoles and neurite retraction in dopaminergic SH-SY5Y cells...
May 19, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28516232/-cns-metabolism-in-high-risk-drug-abuse-german-version-insights-gained-from-1-h-and-31-p-mrs-and-pet
#16
REVIEW
S V Bodea
BACKGROUND: High-risk drug consumption is a considerable problem for public health actors in industrialised countries. The latest trends show a market tendency towards diversification and increasing demand for high-purity synthetic drugs. Whilst most consumers seek medical help after cannabis use, it is high-risk drugs like cocaine, heroin and amphetamines that account for most of the 1000 drug-related deaths that occur in Germany every year. PURPOSE: This article presents the most prominent in vivo cerebral metabolic information in cocaine, heroin and methamphetamine users provided by MRI spectroscopy and PET imaging...
June 2017: Der Radiologe
https://www.readbyqxmd.com/read/28509940/medico-legal-assessment-of-methamphetamine-and-amphetamine-serum-concentrations-what-can-we-learn-from-survived-intoxications
#17
Marco Weber, Rüdiger Lessig, Carolin Richter, Axel P Ritter, Ilona Weiß
Medico-legal experts are increasingly enlisted to assess the methamphetamine and amphetamine serum concentrations after a criminal offense. However, since criminal users rarely provide useful information to medico-legal experts regarding the substances abused, when the substance(s) was/were used, dose of ingestion tools are needed to interpret the analytical data, which can be used as objective evidence in such cases. A comparative series of methamphetamine and amphetamine serum concentrations were used to analyze the frequency of concentrations, to determine methamphetamine/amphetamine concentration ratios, and prove them as a tool to distinguish pure methamphetamine from mixed amphetamine/methamphetamine ingestion...
May 16, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28503702/postmortem-diagnosis-of-hyponatremia-case-report-and-literature-review
#18
REVIEW
Jessica Vanhaebost, Cristian Palmiere, Maria Pia Scarpelli, Fabiola Bou Abdallah, Arnaud Capron, Gregory Schmit
Hyponatremia is defined as a plasma sodium concentration less than 135 or 130 mEq/L (or mmol/L) and may be responsible for life threatening symptoms that can be observed in a variety of medical conditions. Cases of fatal hyponatremia have been reported in both clinical and forensic literature in situations of water intoxication due to psychogenic polydipsia, amphetamine derivative drug intake, high-endurance exercise, iatrogenic causes, and exceptional cases of child abuse by forced water intoxication. Vitreous sodium levels have been determined to be relatively stable during the early postmortem period and similar to levels found in normal serum of living subjects...
May 13, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28492278/direct-and-systemic-administration-of-a-cns-permeant-tamoxifen-analog-reduces-amphetamine-induced-dopamine-release-and-reinforcing-effects
#19
Colleen Carpenter, Alexander G Zestos, Rachel Altshuler, Roderick J Sorenson, Bipasha Guptaroy, Hollis D Showalter, Robert T Kennedy, Emily Jutkiewicz, Margaret E Gnegy
Amphetamines (AMPHs) are globally abused. With no effective treatment for AMPH addiction to date, there is urgent need for the identification of druggable targets that mediate the reinforcing action of this stimulant class. AMPH-stimulated dopamine efflux is modulated by protein kinase C (PKC) activation. Inhibition of PKC reduces AMPH-stimulated dopamine efflux and locomotor activity. The only known CNS-permeant PKC inhibitor is the selective estrogen receptor modulator tamoxifen. In this study we demonstrate that a tamoxifen analog, 6c, which more potently inhibits PKC than tamoxifen but lacks affinity for the estrogen receptor, reduces AMPH-stimulated increases in extracellular dopamine and reinforcement-related behavior...
May 11, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28490912/update-on-the-treatment-of-narcolepsy-clinical-efficacy-of-pitolisant
#20
REVIEW
Michael W Calik
Narcolepsy is a neurological disease that affects 1 in 2,000 individuals and is characterized by excessive daytime sleepiness (EDS). In 60-70% of individuals with narcolepsy, it is also characterized by cataplexy or a sudden loss of muscle tone that is triggered by positive or negative emotions. Narcolepsy decreases the quality of life of the afflicted individuals. Currently used drugs treat EDS alone (modafinil/armodafinil, methylphenidate, and amphetamine), cataplexy alone ("off-label" use of antidepressants), or both EDS and cataplexy (sodium oxybate)...
2017: Nature and Science of Sleep
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