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Gutierrez F, Comba FN, Gasnier A, Gutierrez A, Galicia L, Parrado C, Rubianes MD, Rivas GA. Graphene Paste Electrode: Analytical Applications for the Quantification of Dopamine, Phenolic Compounds and Ethanol. ELECTROANAL 2014. [DOI: 10.1002/elan.201400247] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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52
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Abstract
Dopamine (DA) regulates emotional and motivational behavior through the mesolimbic dopaminergic pathway. Changes in DA signaling in mesolimbic neurotransmission are widely believed to modify reward-related behaviors and are therefore closely associated with drug addiction. Recent evidence now suggests that as with drug addiction, obesity with compulsive eating behaviors involves reward circuitry of the brain, particularly the circuitry involving dopaminergic neural substrates. Increasing amounts of data from human imaging studies, together with genetic analysis, have demonstrated that obese people and drug addicts tend to show altered expression of DA D2 receptors in specific brain areas, and that similar brain areas are activated by food-related and drug-related cues. This review focuses on the functions of the DA system, with specific focus on the physiological interpretation and the role of DA D2 receptor signaling in food addiction. [BMB Reports 2013; 46(11): 519-526]
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Affiliation(s)
- Ja-Hyun Baik
- Molecular Neurobiology Laboratory, Department of Life Sciences, Korea University, Seoul 136-701, Korea
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53
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Sun Y, Meng S, Li J, Shi J, Lu L. Advances in genetic studies of substance abuse in China. SHANGHAI ARCHIVES OF PSYCHIATRY 2014; 25:199-211. [PMID: 24991158 PMCID: PMC4054556 DOI: 10.3969/j.issn.1002-0829.2013.04.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Summary The importance of genetic factors in substance addiction has long been established. The rationale for this work is that understanding of the function of addiction genes and delineation of the key molecular pathways of these genes would enhance the development of novel therapeutic targets and biomarkers that could be used in the prevention and management of substance abuse. Over the past few years, there has been a substantial increase in the number of genetic studies conducted on addiction in China; these studies have primarily focused on heroin, alcohol, and nicotine dependence. Most studies of candidate genes have concentrated on the dopamine, opioid, and serotonin systems. A number of genes associated with substance abuse in Caucasians are also risk factors in Chinese, but several novel genes and genetic risk factors associated with substance abuse in Chinese subjects have also been identified. This paper reviews the genetic studies of substance abuse performed by Chinese researchers. Genotypes and alleles related to addictive behavior in Chinese individuals are discussed and the contributions of Chinese researchers to the international corpus of knowledge about the genetic understanding of substance abuse are described.
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Affiliation(s)
- Yan Sun
- National Institute on Drug Dependence, Peking University, Beijing, China
| | - Shiqiu Meng
- National Institute on Drug Dependence, Peking University, Beijing, China
| | - Jiali Li
- National Institute on Drug Dependence, Peking University, Beijing, China
| | - Jie Shi
- National Institute on Drug Dependence, Peking University, Beijing, China
| | - Lin Lu
- Institute of Mental Health, Peking University, Beijing, China
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Fineberg NA, Chamberlain SR, Goudriaan AE, Stein DJ, Vanderschuren LJ, Gillan CM, Shekar S, Gorwood PA, Voon V, Morein-Zamir S, Denys D, Sahakian BJ, Moeller FG, Robbins TW, Potenza MN. New developments in human neurocognition: clinical, genetic, and brain imaging correlates of impulsivity and compulsivity. CNS Spectr 2014; 19:69-89. [PMID: 24512640 PMCID: PMC4113335 DOI: 10.1017/s1092852913000801] [Citation(s) in RCA: 285] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Impulsivity and compulsivity represent useful conceptualizations that involve dissociable cognitive functions, which are mediated by neuroanatomically and neurochemically distinct components of cortico-subcortical circuitry. The constructs were historically viewed as diametrically opposed, with impulsivity being associated with risk-seeking and compulsivity with harm-avoidance. However, they are increasingly recognized to be linked by shared neuropsychological mechanisms involving dysfunctional inhibition of thoughts and behaviors. In this article, we selectively review new developments in the investigation of the neurocognition of impulsivity and compulsivity in humans, in order to advance our understanding of the pathophysiology of impulsive, compulsive, and addictive disorders and indicate new directions for research.
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Affiliation(s)
- Naomi A. Fineberg
- Hertfordshire Partnership NHS University Foundation Trust, Queen Elizabeth II Hospital, Howlands, Welwyn Garden City, Hertfordshire, UK
- University of Hertfordshire, School of Postgraduate Medicine, College Lane, Hatfield, Hertfordshire, UK
- Cambridge University, School of Clinical Medicine, Addenbrooke’s Hospital, Cambridge, UK
| | - Samuel R. Chamberlain
- Cambridge University, School of Clinical Medicine, Addenbrooke’s Hospital, Cambridge, UK
- Cambridge and Peterborough NHS Foundation Trust (CPFT), Cambridge, UK
| | - Anna E. Goudriaan
- Department of Psychiatry, Amsterdam Institute for Addiction Research, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
- Arkin Mental Health, Amsterdam, The Netherlands
| | - Dan J. Stein
- Department of Psychiatry, University of Cape Town, S. Africa
| | - Louk J.M.J. Vanderschuren
- Dept. of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
- Rudolf Magnus Institute of Neuroscience, Dept. of Neuroscience and Pharmacology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Claire M. Gillan
- Behavioural and Clinical Neuroscience Institute (BCNI), University of Cambridge, Cambridge, UK
- Department of Psychology, University of Cambridge, Cambridge, UK
| | - Sameer Shekar
- Hertfordshire Partnership NHS University Foundation Trust, Queen Elizabeth II Hospital, Howlands, Welwyn Garden City, Hertfordshire, UK
| | - Philip A.P.M. Gorwood
- INSERM UMR894 (Centre of Psychiatry and Neuroscience), 2ter rue d’Alesia, Paris, FRANCE
- Sainte-Anne hospital, CMME (University Paris Descartes), 100 rue de la Santé, Paris, FRANCE
| | - Valerie Voon
- Behavioural and Clinical Neuroscience Institute (BCNI), University of Cambridge, Cambridge, UK
- Department of Psychiatry, University of Cambridge, Cambridge, UK
| | - Sharon Morein-Zamir
- Behavioural and Clinical Neuroscience Institute (BCNI), University of Cambridge, Cambridge, UK
- Department of Psychiatry, University of Cambridge, Cambridge, UK
| | - Damiaan Denys
- Department of Psychiatry, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
- The Netherlands Institute for Neuroscience, an institute of the Royal Netherlands Academy of Arts and Sciences, Amsterdam, The Netherlands
| | - Barbara J. Sahakian
- Cambridge University, School of Clinical Medicine, Addenbrooke’s Hospital, Cambridge, UK
- Behavioural and Clinical Neuroscience Institute (BCNI), University of Cambridge, Cambridge, UK
| | - F. Gerard Moeller
- Departments of Psychiatry and Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Trevor W. Robbins
- Behavioural and Clinical Neuroscience Institute (BCNI), University of Cambridge, Cambridge, UK
- Department of Psychology, University of Cambridge, Cambridge, UK
| | - Marc N. Potenza
- Departments of Psychiatry, Child Study and Neurobiology, Yale School of Medicine, New Haven, Connecticut, USA
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Song R, Bi GH, Zhang HY, Yang RF, Gardner EL, Li J, Xi ZX. Blockade of D3 receptors by YQA14 inhibits cocaine's rewarding effects and relapse to drug-seeking behavior in rats. Neuropharmacology 2013; 77:398-405. [PMID: 24176392 DOI: 10.1016/j.neuropharm.2013.10.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 10/02/2013] [Accepted: 10/07/2013] [Indexed: 12/17/2022]
Abstract
Preclinical studies suggest that dopamine D3 receptor (D3R) antagonists are promising for the treatment of drug abuse and addiction. However, few D3R antagonists have potential to be tested in humans due to short half-life, toxicity or limited preclinical research into pharmacotherapeutic efficacy. Here, we report on a novel D3R antagonist YQA14, which has improved half-life and pharmacokinetic profile and which displays potent pharmacotherapeutic efficacy in attenuating cocaine reward and relapse to drug-seeking behavior. Electrical brain-stimulation reward (BSR) in laboratory animals is a highly sensitive experimental approach to evaluate a drug's rewarding effects. We found that cocaine (2 mg/kg) significantly enhanced electrical BSR in rats (i.e., decreased stimulation threshold for BSR), while YQA14 alone had no effect on BSR. Pretreatment with YQA14 significantly and dose-dependently attenuated cocaine-enhanced BSR. YQA14 also facilitated extinction from drug-seeking behavior in rats during early behavioral extinction, and attenuated cocaine- or contextual cue-induced relapse to drug-seeking behavior. YQA14 alone did not maintain self-administration in either naïve rats or in rats experienced at cocaine self-administration. YQA14 also inhibited expression of repeated cocaine-induced behavioral sensitization. These findings suggest that YQA14 may have pharmacotherapeutic potential in attenuating cocaine-taking and cocaine-seeking behavior. Thus, YQA14 deserves further investigation as a promising agent for treatment of cocaine addiction.
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Affiliation(s)
- Rui Song
- Intramural Research Program, National Institute on Drug Abuse, Baltimore, MD 21224, USA; Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
| | - Guo-Hua Bi
- Intramural Research Program, National Institute on Drug Abuse, Baltimore, MD 21224, USA
| | - Hai-Ying Zhang
- Intramural Research Program, National Institute on Drug Abuse, Baltimore, MD 21224, USA
| | - Ri-Fang Yang
- Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
| | - Eliot L Gardner
- Intramural Research Program, National Institute on Drug Abuse, Baltimore, MD 21224, USA
| | - Jin Li
- Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China.
| | - Zheng-Xiong Xi
- Intramural Research Program, National Institute on Drug Abuse, Baltimore, MD 21224, USA.
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56
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Baik JH. Dopamine signaling in reward-related behaviors. Front Neural Circuits 2013; 7:152. [PMID: 24130517 PMCID: PMC3795306 DOI: 10.3389/fncir.2013.00152] [Citation(s) in RCA: 296] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Accepted: 09/11/2013] [Indexed: 12/20/2022] Open
Abstract
Dopamine (DA) regulates emotional and motivational behavior through the mesolimbic dopaminergic pathway. Changes in DA mesolimbic neurotransmission have been found to modify behavioral responses to various environmental stimuli associated with reward behaviors. Psychostimulants, drugs of abuse, and natural reward such as food can cause substantial synaptic modifications to the mesolimbic DA system. Recent studies using optogenetics and DREADDs, together with neuron-specific or circuit-specific genetic manipulations have improved our understanding of DA signaling in the reward circuit, and provided a means to identify the neural substrates of complex behaviors such as drug addiction and eating disorders. This review focuses on the role of the DA system in drug addiction and food motivation, with an overview of the role of D1 and D2 receptors in the control of reward-associated behaviors.
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Affiliation(s)
- Ja-Hyun Baik
- Molecular Neurobiology Laboratory, Department of Life Sciences, Korea University Seoul, South Korea
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57
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Waselus M, Flagel SB, Jedynak JP, Akil H, Robinson TE, Watson SJ. Long-term effects of cocaine experience on neuroplasticity in the nucleus accumbens core of addiction-prone rats. Neuroscience 2013; 248:571-84. [PMID: 23811073 PMCID: PMC3859827 DOI: 10.1016/j.neuroscience.2013.06.042] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 06/17/2013] [Accepted: 06/19/2013] [Indexed: 01/17/2023]
Abstract
Repeated exposure to drugs of abuse is associated with structural plasticity in brain reward pathways. Rats selectively bred for locomotor response to novelty differ on a number of neurobehavioral dimensions relevant to addiction. This unique genetic animal model was used here to examine both pre-existing differences and long-term consequences of repeated cocaine treatment on structural plasticity. Selectively bred high-responder (bHR) and low-responder (bLR) rats received repeated saline or cocaine injections for 9 consecutive days. Escalating doses of cocaine (7.5, 15 and 30 mg/kg) were administered on the first (day 1) and last (day 9) days of treatment and a single injection of the intermediate dose (15 mg/kg) was given on days 2-8. Motor activity in response to escalating doses of cocaine was compared on the first and last days of treatment to assess the acute and sensitized response to the drug. Following prolonged cocaine abstinence (28 days), spine density was examined on terminal dendrites of medium spiny neurons in the nucleus accumbens core. Relative to bLRs, bHRs exhibited increased psychomotor activation in response to both the acute and repeated effects of cocaine. There were no differences in spine density between bHR and bLR rats under basal conditions or following repeated saline treatment. However, spine density differed markedly between these two lines following prolonged cocaine abstinence. All spine types were decreased in cocaine-treated bHRs, while only mushroom spines were decreased in bLRs that received cocaine. Changes in spine density occurred specifically near the branch point of terminal dendrites. These findings indicate that structural plasticity associated with prolonged cocaine abstinence varies markedly in two selected strains of rats that vary on numerous traits relevant to addiction. Thus, genetic factors that contribute to individual variation in the behavioral response to cocaine also influence cocaine-induced structural plasticity.
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Affiliation(s)
- M Waselus
- Molecular and Behavioral Neuroscience Institute, University of Michigan, Ann Arbor, MI, USA.
| | - S B Flagel
- Molecular and Behavioral Neuroscience Institute, University of Michigan, Ann Arbor, MI, USA; Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA; Neuroscience Program, University of Michigan, Ann Arbor, MI, USA; Department of Psychology, University of Michigan, Ann Arbor, MI, USA
| | - J P Jedynak
- Neuroscience Program, University of Michigan, Ann Arbor, MI, USA
| | - H Akil
- Molecular and Behavioral Neuroscience Institute, University of Michigan, Ann Arbor, MI, USA; Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA; Neuroscience Program, University of Michigan, Ann Arbor, MI, USA
| | - T E Robinson
- Neuroscience Program, University of Michigan, Ann Arbor, MI, USA; Department of Psychology, University of Michigan, Ann Arbor, MI, USA
| | - S J Watson
- Molecular and Behavioral Neuroscience Institute, University of Michigan, Ann Arbor, MI, USA; Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA; Neuroscience Program, University of Michigan, Ann Arbor, MI, USA
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58
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Gramage E, Pérez-García C, Vicente-Rodríguez M, Bollen S, Rojo L, Herradón G. Regulation of extinction of cocaine-induced place preference by midkine is related to a differential phosphorylation of peroxiredoxin 6 in dorsal striatum. Behav Brain Res 2013; 253:223-31. [PMID: 23891929 DOI: 10.1016/j.bbr.2013.07.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 07/11/2013] [Accepted: 07/16/2013] [Indexed: 02/04/2023]
Abstract
The neurotrophic factors Midkine (MK) and Pleiotrophin (PTN) have been suggested to modulate drugs of abuse-induced effects. To test this hypothesis, cocaine (10 and 15mg/kg)-induced conditioned place preference (CPP) was rendered in PTN knockout (PTN-/-), MK knockout (MK-/-) and wild type (WT+/+) mice, and then extinguished after repeated saline injections (distributed in 4 extinction sessions). Cocaine induced a similar CPP in all the three genotypes. We found a significantly increased percentage of MK-/- mice that did not extinguish cocaine CPP at the end of the extinction sessions. Particularly, 40% of MK-/- mice did not extinguish cocaine (15mg/kg)-induced CPP compared to WT+/+ and PTN-/- mice (∼0-6%). Interestingly, we found that a greater magnitude of extinction of CPP after the first extinction session (5 days after last administration of cocaine) correlates with increased tyrosine phosphorylation of the enzyme peroxiredoxin 6 in the dorsal striatum of MK-/- mice. On the other hand, a greater magnitude of CPP extinction correlates with increased tyrosine phosphorylation of aconitase 2 in the prefrontal cortex of WT+/+ mice. In contrast, a lower magnitude of CPP extinction correlates with increased phosphorylation of aconitase 2 in the prefrontal cortex of PTN-/- mice, suggesting that the correlation between the tyrosine phosphorylation levels of aconitase 2 and magnitude of CPP extinction depends on the genotype considered. The data demonstrate that MK is a novel genetic factor that plays a role in the extinction of cocaine-induced CPP by mechanisms that may involve specific phosphorylation of striatal peroxiredoxin 6.
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Affiliation(s)
- Esther Gramage
- Pharmacology Lab, Department of Pharmaceutical and Food Sciences, Facultad de Farmacia, Universidad CEU San Pablo, Madrid, Spain
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59
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Davis C, Loxton NJ. Addictive behaviors and addiction-prone personality traits: associations with a dopamine multilocus genetic profile. Addict Behav 2013; 38:2306-12. [PMID: 23584190 DOI: 10.1016/j.addbeh.2013.02.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Revised: 02/25/2013] [Accepted: 02/27/2013] [Indexed: 02/06/2023]
Abstract
The purpose of this study was to examine reward-related genetic risk for addictive behaviors in a healthy community sample (n=217) of men and women. We tested a mediation model predicting that a quantitative multilocus genetic profile score - reflecting the additive effects of alleles known to confer relatively increased dopamine signaling in the ventral striatum - would relate positively to a composite measure of addictive behaviors, and that this association would be mediated by personality traits consistently associated with addiction disorders. Our model was strongly supported by the data, and accounted for 24% of the variance in addictive behaviors. These data suggest that brain reward processes tend to exert their influence on addiction risk by their role in the development of relatively stable personality traits associated with addictive behaviors.
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60
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Benzerouk F, Gierski F, Gorwood P, Ramoz N, Stefaniak N, Hübsch B, Kaladjian A, Limosin F. Brain-derived neurotrophic factor (BDNF) Val66Met polymorphism and its implication in executive functions in adult offspring of alcohol-dependent probands. Alcohol 2013; 47:271-4. [PMID: 23582695 DOI: 10.1016/j.alcohol.2013.03.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 01/25/2013] [Accepted: 03/16/2013] [Indexed: 10/27/2022]
Abstract
Impairment of executive functions (EFs) mediated by the prefrontal lobe is regarded as a cognitive endophenotype of alcohol dependence, being observed both in probands and in healthy offspring. Given its impact on the anatomy of the prefrontal cortex, the brain-derived neurotrophic factor (BDNF) Val66Met polymorphism may well be involved in this specific endophenotype. Forty-six healthy adult children of alcoholics (HACA) and 82 healthy controls (HC) took part in the study. All the participants were assessed with the Diagnostic Interview for Genetic Studies, and their family histories of alcohol and substance use were assessed with the Family Informant Schedule and Criteria. The Trail Making Test, Arithmetic Switching Task, Stroop Color-Word Test and Wisconsin Card Sorting Test were administered to assess EFs. An overall executive factor score was calculated using factorial analyses. Genotyping of the BDNF Val66Met polymorphism was performed using the TaqMan® allelic discrimination assay. HACA had significantly lower EFs performance than HC. Genetic analysis showed that BDNF genotype distributions were in Hardy-Weinberg equilibrium in the HACA and HC. Genotype and allele distributions did not differ significantly between the two groups. Participants with the Met allele performed significantly more poorly than participants with the Val allele, and a group by allele interaction was observed, the BDNF Met allele being associated with a poorer executive factor score in the HACA group. These results suggest that the BDNF Val66Met polymorphism may contribute to alcohol dependence vulnerability via lower EFs performance.
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61
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Xue C, Han Q, Wang Y, Wu J, Wen T, Wang R, Hong J, Zhou X, Jiang H. Amperometric detection of dopamine in human serum by electrochemical sensor based on gold nanoparticles doped molecularly imprinted polymers. Biosens Bioelectron 2013; 49:199-203. [PMID: 23747995 DOI: 10.1016/j.bios.2013.04.022] [Citation(s) in RCA: 124] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Revised: 04/04/2013] [Accepted: 04/18/2013] [Indexed: 11/30/2022]
Abstract
In this work, a highly sensitive and selective biomimetic electrochemical sensor for the amperometric detection of trace dopamine (DA) in human serums was achieved by gold nanoparticles (AuNPs) doped molecularly imprinted polymers (MIPs). Functionalized AuNPs (F-AuNPs), a novel functional monomer bearing aniline moieties on the surface of the AuNPs, were prepared via a direct synthesis method and then used to fabricate the conductive MIPs film on the modified electrode by electropolymerization method in the presence of DA and p-aminobenzenethiol (p-ATP). The obtained electrochemical sensor based on the conductive film of AuNPs doped MIPs (AuNPs@MIPs) could effectively minimize the interferences caused by ascorbic acid (AA) and uric acid (UA). The linear range for amperometric detection of DA was from 0.02 μmol L(-1) to 0.54 μmol L(-1) with the detection limit of 7.8 nmol L(-1) (S/N=3). Furthermore, the AuNPs@MIPs modified electrode (AuNPs@MIES) was successfully employed to detect trace DA in different human serums.
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Affiliation(s)
- Cheng Xue
- School of Pharmacy, Nanjing Medical University, Nanjing 211166, PR China
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62
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Peng S, Du J, Jiang H, Fu Y, Chen H, Sun H, Wang D, Yu S, Zhao M. The dopamine receptor D1 gene is associated with the length of interval between first heroin use and onset of dependence in Chinese Han heroin addicts. J Neural Transm (Vienna) 2013; 120:1591-8. [PMID: 23661099 DOI: 10.1007/s00702-013-1029-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2012] [Accepted: 04/17/2013] [Indexed: 11/24/2022]
Abstract
Previous researches showed that the dopamine receptor D1 (DRD1) may play a critical role in drug dependence. This research aimed to determine whether DRD1 played a role in development of heroin dependence in Chinese heroin-dependent patients. 465 Chinese Han heroin-dependent subjects and 379 healthy controls were recruited in the Shanghai region. Five single-nucleotide-polymorphisms (SNPs) of the DRD1 gene were genotyped in all subjects. The results found that the frequencies of DRD1 SNP genotypes or haplotypes were not different between heroin-dependent patients and controls. Among heroin-dependent patients, subjects with rs5326CC and/or rs6882300AA genotypes develop to heroin-dependent more rapidly than those without rs5326CC and/or rs6882300AA genotypes. The results indicated that DRD1 gene polymorphism may not play an important role in the susceptibility of heroin dependence in the Chinese Han population, but it may be associated with the rapidity of heroin dependence development from first drug use.
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Affiliation(s)
- Sufang Peng
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, 600 Wan Ping Nan Road, Shanghai, 200030, China
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63
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Cormier F, Muellner J, Corvol JC. Genetics of impulse control disorders in Parkinson's disease. J Neural Transm (Vienna) 2012; 120:665-71. [PMID: 23232665 DOI: 10.1007/s00702-012-0934-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Accepted: 11/27/2012] [Indexed: 10/27/2022]
Abstract
Impulse control disorders (ICD) have been recognised in Parkinson's disease (PD) as adverse effects of dopamine replacement therapy, particularly with dopamine agonists. Although virtually all PD patients are treated with dopaminergic drugs, only a minority will develop hyperdopaminergic states, suggesting predisposing and/or protecting factors. The age at onset, the sex and the dose or type of dopaminergic drugs have been identified as clinical predictive factors. Recent genetic studies have investigated associations between ICD and polymorphisms of genes involved in the dopamine metabolism pathway (COMT, DAT), dopamine receptors (DRD1, DRD2, DRD3, DRD4), serotonin receptors and its transporter (HTR2A, 5HTT), and glutamate receptors (GRIN2B). Although validation in larger and independent cohorts is needed, the results from these studies give us some insights into the pathophysiology of hyperdopaminergic states and may be useful, at term, in personalising antiparkinsonian treatment in clinical practice.
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Affiliation(s)
- Florence Cormier
- Assistance Publique Hôpitaux de Paris, Department of Neurology, INSERM, CIC-9503, Pitié-Salpêtrière Hospital, Paris, France
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64
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Duncan JR. Current perspectives on the neurobiology of drug addiction: a focus on genetics and factors regulating gene expression. ISRN NEUROLOGY 2012; 2012:972607. [PMID: 23097719 PMCID: PMC3477671 DOI: 10.5402/2012/972607] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 09/06/2012] [Indexed: 12/13/2022]
Abstract
Drug addiction is a chronic, relapsing disorder defined by cyclic patterns of compulsive drug seeking and taking interspersed with episodes of abstinence. While genetic variability may increase the risk of addictive behaviours in an individual, exposure to a drug results in neuroadaptations in interconnected brain circuits which, in susceptible individuals, are believed to underlie the transition to, and maintenance of, an addicted state. These adaptations can occur at the cellular, molecular, or (epi)genetic level and are associated with synaptic plasticity and altered gene expression, the latter being mediated via both factors affecting translation (epigenetics) and transcription (non coding microRNAs) of the DNA or RNA itself. New advances using techniques such as optogenetics have the potential to increase our understanding of the microcircuitry mediating addictive behaviours. However, the processes leading to addiction are complex and multifactorial and thus we face a major contemporary challenge to elucidate the factors implicated in the development and maintenance of an addicted state.
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Affiliation(s)
- Jhodie R Duncan
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC 3010, Australia ; Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, VIC 3010, Australia
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