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https://www.readbyqxmd.com/read/28917743/selection-of-an-aptamer-against-muscovy-duck-parvovirus-for-highly-sensitive-rapid-visual-detection-by-label-free-aptasensor
#1
Taofeng Lu, Qin Ma, Wenzhuo Yan, Yuanzhi Wang, Yuanyuan Zhang, Lili Zhao, Hongyan Chen
Muscovy duck parvovirus (MDPV) causes high mortality and morbidity in ducks. This study investigated a novel aptamer-based, label-free aptasensor detection of MDPV. In this study, we developed an ssDNA aptamer using the filtration partition and lambda exonuclease method with an affinity-based monitor and counter-screening process. After 15 rounds of SELEX (systematic evolution of ligands by exponential enrichment), the ssDNA aptamer Apt-10, which specifically bound to MDPV with high affinity (Kd = 467nM) was successfully screened, and the aptamer was also found to be good specific to MDPV...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28910664/the-analysis-of-132-novel-psychoactive-substances-in-human-hair-using-a-single-step-extraction-by-tandem-lc-ms
#2
Vassiliki A Boumba, Matthew Di Rago, Melissa Peka, Olaf H Drummer, Dimitri Gerostamoulos
A rapid LC-MS/MS method for the targeted screening of 132 NPS in hair is described. Drugs include cathinones and synthetic cannabinoids, as well as amphetamine-type stimulants, piperazines and other hallucinogenic compounds. This method utilizes hair pulverization in acidified methanol followed by analysis using liquid chromatography coupled with tandem MS. The limit of detection varied from 0.001 to 0.1ng/mg hair among the various analytes. The method was validated in terms of sensitivity, selectivity, repeatability and stability...
September 5, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28895757/intoxications-in-the-strida-project-involving-a-panorama-of-psychostimulant-pyrovalerone-derivatives-mdpv-copycats
#3
Olof Beck, Matilda Bäckberg, Patrick Signell, Anders Helander
CONTEXT: An increasing number of new psychoactive substances (NPS) of different chemical classes have become available through marketing and sale over the Internet. This report from the Swedish STRIDA project presents the prevalence, laboratory results, and clinical features in intoxications involving 11 stimulant pyrovalerone NPS derivatives over a 5-year period. STUDY DESIGN: Case series of consecutive patients with admitted or suspected intake of NPS presenting to Swedish hospitals for emergency treatment from January 2011 to March 2016...
September 12, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28887185/role-of-monoaminergic-systems-and-ambient-temperature-in-bath-salts-constituent-3-4-methylenedioxypyrovalerone-mdpv-elicited-hyperthermia-and-locomotor-stimulation-in-mice
#4
REVIEW
Brenda M Gannon, Adrian Williamson, Kenner C Rice, William E Fantegrossi
3,4-Methylenedioxypyrovalerone (MDPV) is a common constituent of illicit bath salts products, and in vitro studies implicate monoamine transporters as mediators of its pharmacological effects. Locomotor and thermoregulatory effects of MDPV depend on ambient temperature, so the current studies aimed to gauge the involvement of dopamine (DA), norepinephrine (NE), and serotonin (5-HT) in MDPV-induced locomotor stimulation and hyperthermia in the mouse at different ambient temperatures. Mice were pretreated with the selective 5-HT-reuptake inhibitor fluoxetine (3 mg/kg), the NE-reuptake inhibitor desipramine (3 mg/kg), the DA-reuptake inhibitor bupropion (10 mg/kg), or saline, followed by 10 mg/kg MDPV while thermoregulation and locomotor activity were monitored via radiotelemetry...
September 5, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28884224/transfection-of-embryonated-muscovy-duck-eggs-with-a-recombinant-plasmid-is-suitable-for-rescue-of-infectious-muscovy-duck-parvovirus
#5
Jianye Wang, Yu Huang, Jueyi Ling, Zhixiang Wang, Guoqiang Zhu
For members of the family Parvoviridae, rescue of infectious virus from recombinant plasmid is usually done in cultured cells. In this study, the whole genome of the pathogenic Muscovy duck parvovirus (MDPV) strain YY was cloned into the pBluescript II (SK) vector, generating recombinant plasmid pYY. With the aid of a transfection reagent, pYY plasmid was inoculated into 11-day-old embryonated Muscovy duck eggs via the chorioallantoic membrane route, resulting in the successful rescue of infectious virus and death of the embryos...
September 7, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28882561/locomotor-and-reinforcing-effects-of-pentedrone-pentylone-and-methylone-in-rats
#6
Mehrak Javadi-Paydar, Jacques D Nguyen, Sophia A Vandewater, Tobin J Dickerson, Michael A Taffe
The broad diversity of synthetic cathinone psychostimulant drugs that are available to users complicates research efforts to provide understanding of health risks. Second generation cathinones pentedrone and pentylone are distinguished from each other by the 3,4-methylenedioxy structural motif (which distinguishes methamphetamine from 3,4-methylenedioxymethamphetamine) and each incorporates the α-alkyl chain motif contained in the transporter-inhibitor cathinones (3,4-methylenedioxypyrovalerone (MDPV), α-pyrrolidinopentiophenone (α-PVP)) but not in the monoamine releasers (mephedrone, methylone)...
September 4, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28866386/effects-of-orally-self-administered-bath-salt-constituent-3-4-methylenedioxypyrovalerone-mdpv-in-mice
#7
Brenda M Gannon, Lauren N Russell, Meet S Modi, Kenner C Rice, William E Fantegrossi
Synthetic cathinones in bath salts products are psychostimulant drugs of abuse, and 3,4-methylenedioxypyrovalerone (MDPV) is a common constituent of these products. Oral MDPV has been show to stimulate locomotor activity but reinforcing, locomotor and appetitive stimulus effects of oral MDPV are unknown. Choice procedures evaluated preference for 0.03, 0.10, 0.30, and 1.00mg/mL MDPV solutions versus 0.10mg/mL quinine solution or water. To verify that oral MDPV produced pharmacological effects, locomotor activity was monitored during and after consumption of water, quinine, or MDPV solutions...
August 4, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28844011/the-pharmacokinetics-of-racemic-mdpv-and-its-r-and-s-enantiomers-in-female-and-male-rats
#8
Michael D Hambuchen, Howard P Hendrickson, Melinda G Gunnell, Samantha J McClenahan, Laura E Ewing, Dillon M Gibson, Michael D Berquist, S Michael Owens
BACKGROUND: These studies investigated the serum pharmacokinetic (PK) profile of racemic (3,4)-methylenedioxypyrovalerone [(R,S)-MDPV)] and its (R)- and (S)-enantiomers in female and male Sprague Dawley rats. METHODS: Intravenous (R,S)-MDPV (3 and 5.6mg/kg) and single enantiomer of (R)- and (S)-MDPV (1.5mg/kg) were administered to both sexes for PK studies. Intraperitoneal (ip) bioavailability was determined at 3mg/kg (R,S)-MDPV. Locomotor activity studies were conducted after ip treatment with saline and 0...
October 1, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28815279/evaluation-of-training-dose-in-male-sprague-dawley-rats-trained-to-discriminate-4-methylmethcathinone
#9
Michael D Berquist, Nathyn A Thompson, Lisa E Baker
RATIONALE: Although the synthetic cathinone 4-methylmethcathinone (4-MMC, mephedrone) has been a subject of intensive research investigation, the pharmacological mechanisms involved in its interoceptive stimulus effects have yet to be fully characterized. OBJECTIVE: The present study employed drug discrimination methods in rats to compare the interoceptive stimulus properties of two different training doses of 4-MMC to other substances with similar pharmacological actions...
August 16, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28811192/relative-reinforcing-effects-of-second-generation-synthetic-cathinones-acquisition-of-self-administration-and-fixed-ratio-dose-response-curves-in-rats
#10
REVIEW
Brenda M Gannon, Kayla I Galindo, Melson P Mesmin, Agnieszka Sulima, Kenner C Rice, Gregory T Collins
"Bath salts" preparations contain synthetic cathinones which interact with monoamine transporters and function as either monoamine uptake inhibitors or releasers. 3,4-Methylenedioxypyrovalerone (MDPV), 3,4-methylenedioxymethcathinone (methylone), and 4-methylmethcathinone (mephedrone) were three of the most common cathinones (i.e., "first-generation" cathinones); however, after the US Drug Enforcement Administration placed them under Schedule I regulations, they were replaced with structurally related cathinones that were not subject to regulations (i...
August 12, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28811141/the-pharmacokinetic-profile-of-synthetic-cathinones-in-a-pregnancy-model
#11
Lauren G Strange, Kerri Kochelek, Robert Keasling, Stacy D Brown, Brooks B Pond
In recent years, the abuse of synthetic cathinones or 'bath salts' has become a major public health concern. Although these compounds were initially sold legally and labeled "not for human consumption", the 'bath salts' are psychostimulants, with similar structures and pharmacologic mechanisms to cocaine, the amphetamines, and 3,4 methylendioxymethamphetamine (MDMA, Molly, or Ecstasy). The reported use of these substances by women of child-bearing age highlights the necessity of studies seeking to delineate risks of prenatal exposure...
August 12, 2017: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/28715672/genomic-and-pathogenic-analysis-of-a-muscovy-duck-parvovirus-strain-causing-short-beak-and-dwarfism-syndrome-without-tongue-protrusion
#12
Qiuling Fu, Yu Huang, Chunhe Wan, Guanghua Fu, Baomin Qi, Longfei Cheng, Shaohua Shi, Hongmei Chen, Rongchang Liu, Zhenhai Chen
In 2008, clinical cases of short beak and dwarfism syndrome (SBDS) caused by Muscovy duck parvovirus (MDPV) infection were found in mule duck and Taiwan white duck farms in Fujian, China. A MDPV LH strain causing duck SBDS without tongue protrusion was isolated in this study. Phylogenetic analysis show that the MDPV LH strain was clustered together with other MDPV strains, but divergent from GPV isolates. Two major fragment deletions were found in the inverted terminal repeats (ITR) of MDPV LH similar to the ones in the ITR of MDPV GX5, YY and SAAS-SHNH strains...
July 12, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28704276/effects-of-d1-and-d2-receptor-antagonists-on-the-discriminative-stimulus-effects-of-methylendioxypyrovalerone-and-mephedrone-in-male-sprague-dawley-rats-trained-to-discriminate-d-amphetamine
#13
Eric L Harvey, Rachel L Burroughs, Lisa E Baker
Psychopharmacology research has amassed substantial evidence for similarities between synthetic cathinones and other commonly abused psychostimulants. Few studies have utilized drug discrimination methods to investigate synthetic cathinones, and the precise neurochemical substrates underlying their interoceptive effects have not been examined. The present study assessed the involvement of D1 and D2 dopaminergic receptors in the stimulus effects of 3,4-methylenedioxypyrovalerone (MDPV) and mephedrone (MEPH) in rats trained to discriminate D-amphetamine...
October 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/28684237/monoaminergic-toxicity-induced-by-cathinone-phthalimide-an-in-vitro-study
#14
Susan M Lantz, Hector Rosas-Hernandez, Elvis Cuevas, Bonnie Robinson, Kenner C Rice, William E Fantegrossi, Syed Z Imam, Merle G Paule, Syed F Ali
Bath salts, or synthetic cathinones, have cocaine-like or amphetamine-like properties and induce psychoactive effects via their capacity to modulate serotonin (5-HT) and dopamine (DA). Structurally distinct synthetic cathinones are continuously being generated to skirt existing drug laws. One example of these modified compounds is cathinone phthalimide (CP), which has already appeared on the global market. The lack of toxicological studies on the effects of CP on monoaminergic systems led to the development of the present study in order to generate an acute toxicity profile for CP, and to clarify whether it primarily affects both dopamine and serotonin, like the synthetic cathinones mephedrone and methylone, or primarily affects dopamine, like 3, 4-methylenedioxypyrovalerone (MDPV)...
August 10, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28677665/reinforcing-effects-of-binary-mixtures-of-common-bath-salt-constituents-studies-with-3-4-methylenedioxypyrovalerone-mdpv-3-4-methylenedioxymethcathinone-methylone-and-caffeine-in-rats
#15
Brenda M Gannon, Kayla I Galindo, Melson P Mesmin, Kenner C Rice, Gregory T Collins
'Bath salts' use is associated with high rates of abuse, toxicity, and death. bath salt preparations often contain mixtures of drugs including multiple synthetic cathinones (eg, 3,4-methylenedioxypyrovalerone (MDPV) or 3,4-methylenedioxymethcathinone (methylone)) or synthetic cathinones and caffeine; however, little is known about whether interactions among bath salt constituents contribute to the abuse-related effects of bath salts preparations. This study used male Sprague-Dawley rats responding under a progressive ratio schedule to quantify the reinforcing effectiveness of MDPV, methylone, and caffeine, administered alone and as binary mixtures (n=12 per mixture)...
July 5, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28668987/a-case-of-fatal-idiosyncratic-reaction-to-the-designer-drug-3-4-methylenedioxypyrovalerone-mdpv-and-review-of-the-literature
#16
Brigitte Desharnais, Yann Dazé, Laura M Huppertz, Pascal Mireault, Cameron D Skinner
The stimulant designer drug 3,4-methylenedioxypyrovalerone (MDPV) was first synthesized by Boehringer Ingelheim in 1969 and introduced on the black market in 2006. Only a small number of fatal intoxication cases have been reported in the literature, all with significant blood MDPV concentrations. In this report, we describe one fatality attributed to an idiosyncratic reaction to MDPV. The victim displayed agitation, violent behavior and delirium followed by cardiac arrest. Hyperthermia was observed at the hospital...
July 1, 2017: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/28646714/synthetic-cathinones-and-stereochemistry-s-enantiomer-of-mephedrone-reduces-anxiety-and-depressant-like-effects-in-cocaine-or-mdpv-abstinent-rats
#17
Helene L Philogene-Khalid, Callum Hicks, Allen B Reitz, Lee-Yuan Liu-Chen, Scott M Rawls
BACKGROUND AND PURPOSE: The neuropharmacological profile of the synthetic cathinone mephedrone (MEPH) is influenced by stereochemistry. Both MEPH enantiomers are monoamine transporter substrates, but R-MEPH is primarily responsible for rewarding effects of MEPH as it produces greater locomotor activation and intracranial self-stimulation than S-MEPH. S-MEPH is a 50-fold more potent 5-HT releaser than R-MEPH and does not place preference in rats. MEPH is also structurally similar to the cathinone derivative bupropion, an antidepressant and smoking cessation medication, suggesting MEPH has therapeutic and addictive properties...
September 1, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28646469/the-cathinones-mdpv-and-%C3%AE-pvp-elicit-different-behavioral-and-molecular-effects-following-acute-exposure
#18
Giuseppe Giannotti, Isabella Canazza, Lucia Caffino, Sabrine Bilel, Andrea Ossato, Fabio Fumagalli, Matteo Marti
Since the mid-to-late 2000s, synthetic cathinones have gained popularity among drug users due to their psychostimulant effects greater than those produced by cocaine and amphetamine. Among them, 3,4-methylenedioxypyrovalerone (MDPV) and 1-phenyl-2-(pyrrolidin-1-yl)pentan-1-one (α-PVP) are ones of the most popular cathinones available in the clandestine market as "bath salts" or "fertilizers." Pre-clinical studies indicate that MDPV and α-PVP induced psychomotor stimulation, affected thermoregulation, and promoted reinforcing properties in rodents...
June 23, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28645576/mechanisms-of-hepatocellular-toxicity-associated-with-new-psychoactive-synthetic-cathinones
#19
Dino Luethi, Matthias E Liechti, Stephan Krähenbühl
Synthetic cathinones are a new class of psychostimulant substances. Rarely, they can cause liver injury but associated mechanisms are not completely elucidated. In order to increase our knowledge about mechanisms of hepatotoxicity, we investigated the effect of five frequently used cathinones on two human cell lines. Bupropion was included as structurally related drug used therapeutically. In HepG2 cells, bupropion, MDPV, mephedrone and naphyrone depleted the cellular ATP content at lower concentrations (0...
July 15, 2017: Toxicology
https://www.readbyqxmd.com/read/28601767/pooled-human-liver-preparations-heparg-or-hepg2-cell-lines-for-metabolism-studies-of-new-psychoactive-substances-a-study-using-mdma-mdbd-butylone-mdppp-mdpv-mdpb-5-mapb-and-5-api-as-examples
#20
Lilian H J Richter, Veit Flockerzi, Hans H Maurer, Markus R Meyer
Metabolism studies play an important role in clinical and forensic toxicology. Because of potential species differences in metabolism, human samples are best suitable for elucidating metabolism. However, in the case of new psychoactive substances (NPS), human samples of controlled studies are not available. Primary human hepatocytes have been described as gold standard for in vitro metabolism studies, but there are some disadvantages such as high costs, limited availability, and variability of metabolic enzymes...
September 5, 2017: Journal of Pharmaceutical and Biomedical Analysis
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