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Meth addiction

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https://www.readbyqxmd.com/read/29576706/rhynchophylline-downregulates-phosphorylated-camp-response-element-binding-protein-nuclear-receptor-related-1-and-brain-derived-neurotrophic-factor-expression-in-the-hippocampus-of-ketamine-induced-conditioned-place-preference-rats
#1
Youli Guo, Chaohua Luo, Genghong Tu, Chan Li, Yi Liu, Wei Liu, Ken Kin Lam Yung, Zhixian Mo
Background: Addiction to ketamine is becoming a serious public health issues, for which there exists no effective treatment. Rhynchophylline (Rhy) is an alkaloid extracted from certain Uncaria species that is well known for both its potent anti-addictive and neuroprotective properties. Increasing evidence supports the contributions of cAMP response element binding protein (CREB), nuclear receptor-related-1 (Nurr1), and brain-derived neurotrophic factor (BDNF) in modulating neural and behavioral plasticity which was induced by addictive drugs...
January 2018: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29516602/ago2-and-dicer1-are-involved-in-meth-induced-locomotor-sensitization-in-mice-via-biogenesis-of-mirna
#2
Dan Liu, Li Zhu, Tong Ni, Fang-Lin Guan, Yan-Jiong Chen, Dong-Liang Ma, Eyleen L K Goh, Teng Chen
microRNA (miRNA) play important roles in drug addiction and act as a post-transcriptional regulator of gene expression. We previously reported extensive downregulation of miRNAs in the nucleus accumbens (NAc) of methamphetamine (METH)-sensitized mice. However, the regulatory mechanism of this METH-induced downregulation of miRNAs has yet to be elucidated. Thus, we examined METH-induced changes in the expression of miRNAs and their precursors, as well as the expression levels of mRNA and the proteins involved in miRNA biogenesis such as Dicer1 and Ago2, in the nucleus accumbens of METH-induced locomotor sensitized mice...
March 8, 2018: Addiction Biology
https://www.readbyqxmd.com/read/29492824/inflammasome-activation-by-methamphetamine-potentiates-lipopolysaccharide-stimulation-of-il-1%C3%AE-production-in-microglia
#3
Enquan Xu, Jianuo Liu, Han Liu, Xiaobei Wang, Huangui Xiong
Methamphetamine (Meth) is an addictive psychostimulant abused worldwide. Ample evidence indicate that chronic abuse of Meth induces neurotoxicity via microglia-associated neuroinflammation and the activated microglia present in both Meth-administered animals and human abusers. The development of anti-neuroinflammation as a therapeutic strategy against Meth dependence promotes research to identify inflammatory pathways that are specifically tied to Meth-induced neurotoxicity. Currently, the exact mechanisms for Meth-induced microglia activation are largely unknown...
February 28, 2018: Journal of Neuroimmune Pharmacology: the Official Journal of the Society on NeuroImmune Pharmacology
https://www.readbyqxmd.com/read/29475448/protective-and-restorative-effects-of-the-traditional-chinese-medicine-jitai-tablet-against-methamphetamine-induced-dopaminergic-neurotoxicity
#4
Shasha Xu, Shaoang Tu, Jinlong Gao, Jia Liu, Zhirui Guo, Jinming Zhang, Xingdang Liu, Jianhui Liang, Yiyun Huang, Mei Han
BACKGROUND: Methamphetamine (METH) is a psychostimulant with high abuse liability that affects the monoamine neurotransmitter systems, particularly the dopamine system. Currently there are no effective medications for the treatment of METH abuse to restore METH-induced dopaminergic dysfunction. The Jitai tablet (JTT), a commercial traditional Chinese medicinal preparation, has been shown to modulate the dopaminergic function both in heroin addicts and in morphine-dependent rats. The purpose of this study was to investigate, in a rodent model, whether JTT can protect against METH-induced neurotoxicity, and/or restore METH-damaged dopaminergic function...
February 23, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29452175/replacement-treatment-during-extinction-training-with-the-atypical-dopamine-uptake-inhibitor-jhw-007-reduces-relapse-to-methamphetamine-seeking
#5
Ashlea F Dassanayake, Juan J Canales
There are currently no approved medications to effectively counteract the effects of methamphetamine (METH), reduce its abuse and prolong abstinence from it. Data accumulated in recent years have shown that a range of N-substituted benztropine (BZT) analogues possesses psychopharmacological features consistent with those of a potential replacement or "substitute" treatment for stimulant addiction. On the other hand, the evidence that antidepressant therapy may effectively prevent relapse to stimulant seeking is controversial...
February 13, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29447954/the-inhibitory-effect-of-levo-tetrahydropalmatine-on-the-methamphetamine-induced-spatial-memory-impairment-in-mice
#6
Guofen Cao, Yongai Zhang, Li Zhu, Jie Zhu, Na Zhao, Nan Dong, Yonghui Dang, Yanjiong Chen, Teng Chen
Methamphetamine (METH) administration results in addiction and memory impairment. Previous studies have suggested that levo-tetrahydropalmatine (l-THP), an alkaloid purified from the Chinese herb Corydalis, attenuates the behavioral changes induced by METH. Therefore, in this study, we explored whether l-THP could also protect against the METH-induced memory impairment examined using the Morris water maze (MWM). We found that low dose of METH (1.0 mg/kg) treated for 20 consecutive days prior to the MWM experiment impaired spatial memory retention but not acquisition in mice...
February 12, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29434815/dopamine-receptor-d4-promoter-hypermethylation-increases-the-risk-of-drug-addiction
#7
Huihui Ji, Xuting Xu, Guili Liu, Huifen Liu, Qinwen Wang, Wenwen Shen, Longhui Li, Xiaohu Xie, Haochang Hu, Lei Xu, Wenhua Zhou, Shiwei Duan
Heroin and methylamphetamine (METH) are two addictive drugs that cause serious problems for society. Dopamine receptor D4 (DRD4), a key receptor in the dopaminergic system, may facilitate the development of drug addiction. The aim of the present study was to investigate the association between the promoter methylation level of DRD4 gene and drug addiction. Bisulfite pyrosequencing technology was used to measure the methylation levels of DRD4 promoter in 60 drug addicts and 52 matched controls. Significantly higher levels of DRD4 CpG1 and CpG4 methylation were detected in METH and heroin drug addicts compared with controls (P<0...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29421246/repeated-restraint-stress-reduces-the-acquisition-and-relapse-of-methamphetamine-conditioned-place-preference-but-not-behavioral-sensitization
#8
Jee-Yeon Seo, Yong-Hyun Ko, Shi-Xun Ma, Bo-Ram Lee, Seok-Yong Lee, Choon-Gon Jang
The studies for the effects of stress on drug addiction were mostly obtained using sequential exposure to stress and drugs. However, few studies have been conducted on the effects of simultaneous exposure to stress and methamphetamine (METH) on METH-induced reward effects and behavioral sensitization. Thus, we examined the effects of simultaneous exposure to restraint stress and METH on METH-induced addictive behaviors using conditioned place preference (CPP) in mice. During the conditioning period, the mice were exposed to 2 h restraint stress before administration of METH or saline for 4 days...
February 5, 2018: Brain Research Bulletin
https://www.readbyqxmd.com/read/29383398/methamphetamine-withdrawal-induces-activation-of-crf-neurons-in-the-brain-stress-system-in-parallel-with-an-increased-activity-of-cardiac-sympathetic-pathways
#9
Juan Antonio García-Carmona, Polymnia Georgiou, Panos Zanos, Alexis Bailey, Maria Luisa Laorden
Methamphetamine (METH) addiction is a major public health problem in some countries. There is evidence to suggest that METH use is associated with increased risk of developing cardiovascular problems. Here, we investigated the effects of chronic METH administration and withdrawal on the activation of the brain stress system and cardiac sympathetic pathways. Mice were treated with METH (2 mg/kg, i.p.) for 10 days and left to spontaneous withdraw for 7 days. The number of corticotrophin-releasing factor (CRF), c-Fos, and CRF/c-Fos neurons was measured by immunohistochemistry in the paraventricular nucleus of the hypothalamus (PVN) and the oval region of the bed nucleus of stria terminalis (ovBNST), two regions associated with cardiac sympathetic control...
January 30, 2018: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/29360540/the-sigma-1-receptor-as-a-regulator-of-dopamine-neurotransmission-a-potential-therapeutic-target-for-methamphetamine-addiction
#10
REVIEW
Danielle O Sambo, Joseph J Lebowitz, Habibeh Khoshbouei
Methamphetamine (METH) abuse is a major public health issue around the world, yet there are currently no effective pharmacotherapies for the treatment of METH addiction. METH is a potent psychostimulant that increases extracellular dopamine levels by targeting the dopamine transporter (DAT) and alters neuronal activity in the reward centers of the brain. One promising therapeutic target for the treatment of METH addiction is the sigma-1 receptor (σ1R). The σ1R is an endoplasmic reticulum-localized chaperone protein that is activated by cellular stress, and, unique to this chaperone, its function can also be induced or inhibited by different ligands...
January 22, 2018: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29353054/the-role-of-the-vasopressin-v1a-receptor-in-oxytocin-modulation-of-methamphetamine-primed-reinstatement
#11
Nicholas A Everett, Iain S McGregor, Sarah J Baracz, Jennifer L Cornish
The neuropeptide oxytocin has shown promise as an effective therapy in pre-clinical models of methamphetamine (METH) addiction. The nucleus accumbens core (NAcc) has been identified as an important site for oxytocin to inhibit METH behaviours, although previous findings suggest that the effects of oxytocin in the NAcc are mediated by receptors other than the oxytocin receptor (OTR). Oxytocin has high affinity for the vasopressin V1A receptor (V1AR) which has been implicated in numerous oxytocin-dependent social behaviours...
May 1, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29340869/intervention-effect-of-repetitive-tms-on-behavioral-adjustment-after-error-commission-in-long-term-methamphetamine-addicts-evidence-from-a-two-choice-oddball-task
#12
Qiongdan Liang, Jia Lin, Jiemin Yang, Xiang Li, Yijiang Chen, Xianxin Meng, Jiajin Yuan
Behavioral adjustment plays an important role in the treatment and relapse of drug addiction. Nonetheless, few studies have examined behavioral adjustment and its plasticity following error commission in methamphetamine (METH) dependence, which is detrimental to human health. Thus, we investigated the behavioral adjustment performance following error commission in long-term METH addicts and how it varied with the application of repetitive transcranial magnetic stimulation (rTMS) of the left dorsolateral prefrontal cortex (DLPFC)...
January 16, 2018: Neuroscience Bulletin
https://www.readbyqxmd.com/read/29338492/genetic-variation-of-gria3-gene-is-associated-with-vulnerability-to-methamphetamine-dependence-and-its-associated-psychosis
#13
Sri-Arun Iamjan, Samur Thanoi, Paritat Watiktinkorn, Gavin P Reynolds, Sutisa Nudmamud-Thanoi
Methamphetamine (METH) is an addictive psychostimulant drug commonly leading to schizophrenia-like psychotic symptoms. Disturbances in glutamatergic neurotransmission have been proposed as neurobiological mechanisms and the α-amino-3 hydroxy-5 methyl-4 isoxazole propionic acid (AMPA) glutamate receptor has been implicated in these processes. Moreover, genetic variants in GRIAs, genes encoding AMPA receptor subunits, have been observed in association with both drug dependence and psychosis. We hypothesized that variation of GRIA genes may be associated with METH dependence and METH-induced psychosis...
March 2018: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/29334687/cognitive-deficits-in-methamphetamine-users-how-strong-is-the-evidence
#14
Lisa Proebstl, Felicia Kamp, Gabi Koller, Michael Soyka
Methamphetamine use has spread in many European countries and the United States. The current review provides a summary and critical analysis of research on cognitive deficits associated with methamphetamine, also known as "crystal meth." The literature search performed for this review led us to the hypothesis that methamphetamine use is associated with persistent changes in brain metabolism that result in various impairments, such as deficits in memory, attention, and concentration. The dopaminergic system in particular seems to be affected...
January 15, 2018: Pharmacopsychiatry
https://www.readbyqxmd.com/read/29288750/generalization-of-effects-of-environmental-enrichment-on-seeking-for-different-classes-of-drugs-of-abuse
#15
Magdalena Sikora, Céline Nicolas, Marine Istin, Nematollah Jaafari, Nathalie Thiriet, Marcello Solinas
BACKGROUND: Addiction is a chronic disease characterized by persistent vulnerability to relapse during abstinence. In animal models of addiction, accumulating evidence suggests that exposure to environmental enrichment (EE) during periods of abstinence can have curative effects on addiction and reduce the risks of relapse. However, until present most studies have mainly focused on cocaine. In this study, we investigated whether EE could have beneficial effects on cue-induced seeking for several psychoactive drugs belonging to different pharmacological classes such as methamphetamine (METH), heroin (HER) and nicotine (NIC)...
April 2, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29247759/repeated-methamphetamine-and-modafinil-induce-differential-cognitive-effects-and-specific-histone-acetylation-and-dna-methylation-profiles-in-the-mouse-medial-prefrontal-cortex
#16
Betina González, Subramaniam Jayanthi, Natalia Gomez, Oscar V Torres, Máximo H Sosa, Alejandra Bernardi, Francisco J Urbano, Edgar García-Rill, Jean-Lud Cadet, Verónica Bisagno
Methamphetamine (METH) and modafinil are psychostimulants with different long-term cognitive profiles: METH is addictive and leads to cognitive decline, whereas modafinil has little abuse liability and is a cognitive enhancer. Increasing evidence implicates epigenetic mechanisms of gene regulation behind the lasting changes that drugs of abuse and other psychotropic compounds induce in the brain, like the control of gene expression by histones 3 and 4 tails acetylation (H3ac and H4ac) and DNA cytosine methylation (5-mC)...
March 2, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29217282/atypical-dopamine-transporter-inhibitors-attenuate-compulsive-like-methamphetamine-self-administration-in-rats
#17
Brendan J Tunstall, Chelsea P Ho, Jianjing Cao, Janaína C M Vendruscolo, Brooke E Schmeichel, Rachel D Slack, Gianluigi Tanda, Alexandra J Gadiano, Rana Rais, Barbara S Slusher, George F Koob, Amy H Newman, Leandro F Vendruscolo
Methamphetamine (METH) is a highly addictive drug, but no pharmacological treatment is yet available for METH use disorders. Similar to METH, the wake-promoting drug (R)-modafinil (R-MOD) binds to the dopamine transporter (DAT). Unlike METH, R-MOD is not a substrate for transport by DAT and has low abuse potential. We tested the hypothesis that the atypical DAT inhibitor R-MOD and compounds that are derived from modafinil would decrease METH intake by reducing the actions of METH at the DAT. We tested the effects of systemic injections of R-MOD and four novel modafinil-derived ligands with increased DAT affinity (JJC8-016, JJC8-088, JJC8-089, and JJC8-091) on intravenous (i...
March 15, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29185481/methamphetamine-induces-dopamine-release-in-the-nucleus-accumbens-through-a-sigma-receptor-mediated-pathway
#18
David M Hedges, J Daniel Obray, Jordan T Yorgason, Eun Young Jang, Vajira K Weerasekara, Joachim D Uys, Frederick P Bellinger, Scott C Steffensen
Methamphetamine (METH) is a drug with a high addictive potential that is widely abused across the world. Although it is known that METH dysregulates both dopamine transmission and dopamine reuptake, the specific mechanism of action remains obscure. One promising target of METH is the sigma receptor, a chaperone protein located on the membrane of the endoplasmic reticulum. Using fast-scan cyclic voltammetry, we show that METH-enhancement of evoked dopamine release and basal efflux is dependent on sigma receptor activation...
November 29, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29175029/depletion-of-d3-dopamine-receptor-affects-methamphetamine-induced-expression-patterns-of-pde4b-and-atf3
#19
Yanjiong Chen, Cuo Yang, Li Zhu, Jiaqi Li, Fanglin Guan, Teng Chen
The role of the D3 dopamine receptor (D3R) and the specific molecular mechanisms underlying the regulation of D3R via the cAMP signaling pathway in methamphetamine (METH) addiction are still unclear. Here, we measured changes in Pde4b and Atf3 in the cAMP signaling pathway of dopaminergic system components, including the nucleus accumbens (NAc), caudate putamen (CPu) and hippocampus (Hip), in D3R knockout mice(D3R-/-) 1h and 24h after METH-induced behavioral sensitization. We found that knocking out D3R attenuated METH-induced behavioral sensitization, and Pde4b and Atf3 exhibited different expression patterns in brain regions in response to METH...
February 5, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29174638/upregulation-of-ccl7-and-ccl2-in-reward-system-mediated-through-dopamine-d1-receptor-signaling-underlies-methamphetamine-induced-place-preference-in-mice
#20
Fumihiro Saika, Norikazu Kiguchi, Naoki Wakida, Daichi Kobayashi, Yohji Fukazawa, Shinsuke Matsuzaki, Shiroh Kishioka
We previously showed that the CC-chemokine ligand 2 (CCL2)-CC-chemokine receptor 2 (CCR2) system is responsible for conditioned place preference (CPP) by methamphetamine (Meth). In this study, we investigated the roles for other chemokines mediating Meth-induced CPP and the upstream factors upregulating chemokines in mice. We found that CCL7 mRNA level was upregulated in the prefrontal cortex (PFC) after Meth administration (3mg/kg, subcutaneous), and increased CCL7 immunoreactivity was localized to the PFC NeuN-positive neurons...
February 5, 2018: Neuroscience Letters
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