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https://www.readbyqxmd.com/read/28630283/molecular-behavioral-and-physiological-consequences-methamphetamine-neurotoxicity-implications-for-treatment
#1
Anna Moszczynska, Sean P Callan
Understanding the relationship between the molecular mechanisms underlying neurotoxicity of high-dose methamphetamine (METH) and related clinical manifestations is imperative for providing more effective treatments for human METH users. This article provides overview of neurobiology underlying consequences of administration of neurotoxic METH doses.
June 19, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28622724/porphyrin-arch-tapes-synthesis-contorted-structures-and-full-conjugation
#2
Norihito Fukui, Taeyeon Kim, Dongho Kim, Atsuhiro Osuka
Porphyrin tapes possessing meso-meso β-β β-β triple direct linkages have been targets of extensive studies because of their fully conjugated characteristic π-electronic networks. In this paper, we report porphyrin arch-tapes that bear additional carbonyl group(s) or methylene group(s) inserted between one of the β-β linkage(s) of the porphyrin tapes. The carbonyl-inserted porphyrin arch-tapes were efficiently synthesized by double fusion reactions of β-to-β carbonyl-bridged porphyrin oligomers with DDQ and Sc(OTf)3, and were converted to the methylene-bridged porphyrin arch-tapes via Luche reduction with NaBH4 and CeCl3 followed by ionic hydrogenation with HBF4·OEt2 and BH3·NEt3...
June 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28621212/methamphetamine-causes-neurotoxicity-by-promoting-polarization-of-macrophages-and-inflammatory-response
#3
X Li, F Wu, L Xue, B Wang, J Li, Y Chen, T Chen
Macrophages, especially their activation state, are closely related to the progression of neurotoxicity. Classically activated macrophages (M1) are proinflammatory effectors, while alternatively activated macrophages (M2) exhibit anti-inflammatory properties. As a powerful addictive psychostimulant drug, coupled with its neurotoxicity, methamphetamine (Meth) abuse may lead to long-lasting abnormalities in the neuronal system. The present study investigated the effect of Meth at subtoxic concentration on macrophage activation state and its underlying toxicity to neuronal cells...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28619521/overview-of-long-non-coding-rna-and-mrna-expression-in-response-to-methamphetamine-treatment-in-vitro
#4
Kun Xiong, Lingling Long, Xudong Zhang, Hongke Qu, Haixiao Deng, Yanjun Ding, Jifeng Cai, Shuchao Wang, Mi Wang, Lvshuang Liao, Jufang Huang, Chunxia Yi, Jie Yan
Long non-coding RNAs (lncRNAs) display multiple functions including regulation of neuronal injury. However, their impact in methamphetamine (METH)-induced neurotoxicity has rarely been reported. Here, using microarray analysis, we investigated the expression profiling of lncRNAs and mRNAs in primary cultured prefrontal cortical neurons after METH treatment. We observed a difference in lncRNA and mRNA expression between the experimental and sham control groups. Using bioinformatics, we analyzed the highest enriched gene ontology (GO) terms of biological process, cellular component, and molecular function, and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway and pathway network analysis...
June 12, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28613841/estimating-a-representative-value-and-proportion-of-true-zeros-for-censored-analytical-data-with-applications-to-contaminated-site-assessment
#5
Claus Philip Haslauer, Jessica R Meyer, András Bárdossy, Beth L Parker
This paper demonstrates a maximum likelihood-based approach to derive representative ("best guess") contaminant concentrations from data with censored values (e.g., less than the detection limit). The method represents an advancement over existing techniques because it is capable of estimating the proportion of measurements that are true zeros and incorporating varying levels of censorship (e.g., sample specific detection limits, changes through time in method detection). The ability of the method to estimate the proportion of true zeros is validated using precipitation data...
June 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28612507/hiv-and-drug-abuse-mediate-astrocyte-senescence-in-a-%C3%AE-catenin-dependent-manner-leading-to-neuronal-toxicity
#6
Chunjiang Yu, Srinivas D Narasipura, Maureen H Richards, Xiu-Ti Hu, Bryan Yamamoto, Lena Al-Harthi
Emerging evidence suggests that cell senescence plays an important role in aging-associated diseases including neurodegenerative diseases. HIV leads to a spectrum of neurologic diseases collectively termed HIV-associated neurocognitive disorders (HAND). Drug abuse, particularly methamphetamine (meth), is a frequently abused psychostimulant among HIV+ individuals and its abuse exacerbates HAND. The mechanism by which HIV and meth lead to brain cell dysregulation is not entirely clear. In this study, we evaluated the impact of HIV and meth on astrocyte senescence using in vitro and several animal models...
June 13, 2017: Aging Cell
https://www.readbyqxmd.com/read/28600929/detrimental-effects-of-self-administered-methamphetamine-during-pregnancy-on-offspring-development-in-the-rat
#7
Daniela Rüedi-Bettschen, Donna M Platt
BACKGROUND: Methamphetamine (METH) abuse by pregnant women is a commonly observed phenomenon. While the harmful effects of METH are well described for adults, there is only limited knowledge of the effects of METH use during pregnancy on the developing child. In the present study, we investigated how intraveneous (iv) METH self-administration throughout pregnancy affected rat dams and their offspring through weaning, compared to controls. METHODS: Female rats (n=16) were trained to self-administer METH iv; every drug infusion by a dam also resulted in a saline injection to a yoked control (n=16)...
June 1, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28591543/influence-of-polyphenol-rich-diet-on-exercise-induced-immunomodulation-in-male-endurance-athletes
#8
Korbinian Lackermair, Johannes Scherr, Georg Waidhauser, Heiko Methe, Eva Hoster, David C Nieman, Alan Hanley, Sebastian Clauss, Martin Halle, Thomas Nickel
<u>Introduction:</u> Stress is associated with increased susceptibility to infection. We investigated if the mechanism involves immunomodulation of dendritic cells and whether this can be inhibited by a polyphenol-rich diet. <u>Methods:</u> Blood samples were taken from a total of 100 male endurance athletes at five time points around a marathon run: four weeks before, during one week before, and immediately, 24hours and 72hours after. Participants were randomized into two double blinded groups...
June 7, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28576820/mir-210-expression-is-associated-with-methionine-induced-differentiation-of-trout-satellite-cells
#9
M Latimer, N Sabin, A Le Cam, I Seiliez, P Biga, J C Gabillard
In fish, data on miRNAs involved in myogenesis are scarce. In order to identify miRNAs involved in satellite cell differentiation, we used a methionine depletion/replenishment protocol to synchronize myogenic cell differentiation. Our results validated that methionine removal (72H) from the medium strongly decreased myoD1 and myogenin expression indicating differentiation arrest. In contrast, methionine replenishment rescued expression of myoD1 and myogenin showing a resumption of differentiation. We performed a miRNA array analysis of myogenic cells from three conditions: presence of methionine (CTRL), absence of methionine during 72h (Meth-) and absence of methionine during 48H with 24H of methionine replenishment (Meth -/+)...
June 2, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28570298/the-effect-of-litter-separation-on-methamphetamine-conditioned-place-preference-in-post-partum-dams
#10
Candace R Lewis, Allison N Baker, Paulette Fennig, Phoebe Conrad, Lyndsay Hess, Ryan M Bastle, M Foster Olive
Methamphetamine (METH) abuse among women has recently increased to levels comparable to those observed in men. Although studies using animal models of addiction have begun to include more female subjects, examination of the effects of drugs of abuse on post-partum females is currently lacking. This is especially important in light of the significant hormonal and neurobiological changes that accompany pregnancy and rearing experiences. Furthermore, stress in a known factor in addiction vulnerability and the post-partum experience in the clinical population can be highly stressful...
May 31, 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/28561211/-increasing-consumption-of-crystal-meth-in-saxony-and-its-risks-for-mother-and-child-experiences-at-a-level-i-perinatal-center-from-a-pediatric-viewpoint
#11
Jürgen Dinger, Nicole Näther, Pauline Wimberger, Ulrich S Zimmermann, Jochen Schmitt, Jörg Reichert, Mario Rüdiger
Over the past several years, the number of first-time users of methamphetamine considerably increased within the Free State of Saxony. This number also, and especially, includes women of child-bearing age and young mothers. A supportive intervention aimed at reducing the effects of drug abuse should begin in a timely way - during pregnancy at latest, but better before it. To develop an optimal care protocol for both the mother and her child, more knowledge regarding the personal conditions of the women as well as the specific features of later child development after prenatal methamphetamine exposure (PME) is vital...
April 2017: Zeitschrift Für Geburtshilfe und Neonatologie
https://www.readbyqxmd.com/read/28554137/evaluating-the-non-lethal-effects-of-organophosphorous-and-carbamate-insecticides-on-the-yabby-cherax-destructor-using-cholinesterase-ache-bche-glutathione-s-transferase-and-atpase-as-biomarkers
#12
Ben Pham, Ana Miranda, Graeme Allinson, Dayanthi Nugegoda
The toxicity of two organophosphorus insecticides, chlorpyrifos (CPF), malathion (MAL), and one carbamate insecticide, methomyl (METH), to the yabby (Cherax destructor) was assessed by measuring cholinesterase (AChE, BChE), Glutathione S-Transferase (GST) and Na(+)/K(+)ATPase activity after 96h of exposure. Yabbies exposed to all three insecticides at 2 and 5µgL(-1) exhibited significant AChE, BChE, GST and Na(+)/K(+)ATPase inhibition. Based on these enzyme inhibition tests, the toxicity of the three insecticides to C...
May 26, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28553166/recombinant-aav8-mediated-intrastriatal-gene-delivery-of-cdnf-protects-rats-against-methamphetamine-neurotoxicity
#13
Lizheng Wang, Zixuan Wang, Xiaoyu Xu, Rui Zhu, Jinpeng Bi, Wenmo Liu, Xinyao Feng, Hui Wu, Haihong Zhang, Jiaxin Wu, Wei Kong, Bin Yu, Xianghui Yu
Methamphetamine (METH) exerts significant neurotoxicity in experimental animals and humans when taken at high doses or abused chronically. Long-term abusers have decreased dopamine levels, and they are more likely to develop Parkinson's disease (PD). To date, few medications are available to treat the METH-induced damage of neurons. Glial cell line-derived neurotrophic factor (GDNF) has been previously shown to reduce the dopamine-depleting effects of neurotoxic doses of METH. However, the effect of cerebral dopamine neurotrophic factor (CDNF), which has been reported to be more specific and efficient than GDNF in protecting dopaminergic neurons against 6-OHDA toxicity, in attenuating METH neurotoxicity has not been determined...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28552341/methamphetamine-potentiates-hiv-1gp120-induced-microglial-neurotoxic-activity-by-enhancing-microglial-outward-k-current
#14
Jianuo Liu, Enquan Xu, Guihua Tu, Han Liu, Jiangtao Luo, Huangui Xiong
Methamphetamine (Meth) abuse not only increases the risk of human immunodeficiency virus-1 (HIV-1) infection, but exacerbates HIV-1-associated neurocognitive disorders (HAND) as well. The mechanisms underlying the co-morbid effect are not fully understood. Meth and HIV-1 each alone interacts with microglia and microglia express voltage-gated potassium (KV) channel KV1.3. To understand whether KV1.3 functions an intersecting point for Meth and HIV-1, we studied the augment effect of Meth on HIV-1 glycoprotein 120 (gp120)-induced neurotoxic activity in cultured rat microglial cells...
May 25, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28551495/capsular-specific-igm-enhances-complement-mediated-phagocytosis-and-killing-of-cryptococcus-neoformans-by-methamphetamine-treated-j774-16-macrophage-like-cells
#15
Lilit Aslanyan, Vaibhav V Ekhar, Carlos M DeLeon-Rodriguez, Luis R Martinez
Methamphetamine (METH) is a powerful and highly addictive stimulant that affects the central nervous system of users in the United States and worldwide, and its consumption is associated to the acquisition of HIV and AIDS-related infections. METH enhances cryptococcosis in mice, an opportunistic infection caused by the encapsulated fungus Cryptococcus neoformans. Due to its ability to survive within macrophages, C. neoformans is an ideal model to study pathogen-macrophage interactions. METH abrogates normal macrophage function, which might contribute to the higher rate and more rapid progression of infections in drug abusers...
May 25, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28529796/crystal-structure-of-di-bromo-meth-oxy-seselin-dbms-a-photobiologically-active-pyran-ocoumarin
#16
A K Bauri, Sabine Foro, A F M M Rahman
The title compound, C15H14Br2O4 [systematic name: rac-(9S,10R)-3,9-dibromo-10-methoxy-8,8-dimethyl-9,10-dihydropyrano[2,3-h]chromen-2(8H)-one], is a pyran-ocoumarin derivative formed by the bromination of seselin, which is a naturally occurring angular pyran-ocoumarin isolated from the Indian herb Trachyspermum stictocarpum. In the mol-ecule, the benzo-pyran ring system is essentially planar, with a maximum deviation of 0.044 (2) Å for the O atom. The di-hydro-pyran ring is in a half-chair conformation and the four essentially planar atoms of this ring form a dihedral angle of 4...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529786/the-crystal-structures-of-three-pyrazine-2-5-dicarb-oxamides-three-dimensional-supra-molecular-structures
#17
Dilovan S Cati, Helen Stoeckli-Evans
The complete mol-ecules of the title compounds, N(2),N(5)-bis-(pyridin-2-ylmeth-yl)pyrazine-2,5-dicarboxamide, C18H16N6O2 (I), 3,6-dimethyl-N(2),N(5)-bis-(pyridin-2-yl-meth-yl)pyrazine-2,5-dicarboxamide, C20H20N6O2 (II), and N(2),N(5)-bis-(pyridin-4-ylmeth-yl)pyrazine-2,5-dicarboxamide, C18H16N6O2 (III), are generated by inversion symmetry, with the pyrazine rings being located about centres of inversion. Each mol-ecule has an extended conformation with the pyridine rings inclined to the pyrazine ring by 89...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529778/crystal-structure-of-the-diglycidyl-ether-of-eugenol
#18
Jordan Vigier, Camille François, Sylvie Pourchet, Gilles Boni, Laurent Plasseraud, Vincent Placet, Stéphane Fontaine, Hélène Cattey
The diep-oxy monomer, C13H16O4 {DGE-Eu; systematic name: 2-[3-meth-oxy-4-(oxiran-2-ylmeth-oxy)benz-yl]oxirane}, was synthesized from eugenol by a three-step reaction. It consists of a 1,2,4-tris-ubstituted benzene ring substituted by diglycidyl ether, a meth-oxy group and a methyl-oxirane group. The three-membered oxirane rings are inclined to the benzene ring by 61.0 (3) and 27.9 (3)°. The methyl-ene C atom of one of the two terminal epoxide rings is positionally disordered [refined occupancy ratio = 0...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529777/crystal-structures-of-titanium-aluminium-and-gallium-complexes-bearing-two-%C3%AE-2-ch3-units
#19
Tim Oswald, Mira Diekmann, Annika Frey, Marc Schmidtmann, Rüdiger Beckhaus
The isotypic crystal structures of two titanocene complexes containing an EMe3 unit (E = Al, Ga; Me = meth-yl) with two μ2-coordinating methyl groups, namely [μ-1(η(5))-(adamantan-1-yl-2κC(1))cycylo-penta-dien-yl]di-μ2-methyl-methyl-2κC-[1(η(5))-penta-methyl-cyclo-penta-dien-yl]aluminiumtitanium(III), [AlTi(CH3)3(C10H15)(C15H18)], and [μ-1(η(5))-(adamantan-1-yl-2κC(1))cycylo-penta-dien-yl]di-μ2-methyl-methyl-2κC-[1(η(5))-penta-methyl-cyclo-penta-dien-yl]galliumtitanium(III), [GaTi(CH3)3(C10H15)(C15H18)], are reported...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529776/crystal-structure-of-5-benzyl-8-bromo-2-meth-yl-1-3-oxazolo-4-5-c-1-8-naphthyridin-4-5h-one
#20
Johannes Vrijdag, An Van den Bogaert, Wim De Borggraeve, Luc Van Meervelt
The title compound, C17H12BrN3O2, was unexpectedly isolated during an attempt to synthesize pyridodiazepinediones and identified as an oxazolonaphthyridinone derivative. The almost planar oxazolonaphthyridinone ring (r.m.s. deviation = 0.016 Å) makes a dihedral angle of 61.6 (2)° with the phenyl ring. In the crystal, columns of mol-ecules stacked along the a axis are formed by π-π inter-actions between the six-membered rings of the oxazolonaphthyridone moieties [centroid-to-centroid distances = 3.494 (2)-3...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
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