2024
Preclinical Evidence of the Effects of Sweet Flavors: Sweetness Increases Nicotine Intake and Seeking
Bagdas D, Addy N. Preclinical Evidence of the Effects of Sweet Flavors: Sweetness Increases Nicotine Intake and Seeking. Nicotine & Tobacco Research 2024, ntae241. PMID: 39413033, DOI: 10.1093/ntr/ntae241.Peer-Reviewed Original ResearchNicotine use behaviorsNicotine reinforcementNicotine intakeSelf-administrationNicotine useFlavor exposureUse behaviorsIntravenous nicotine self-administrationPattern of nicotine intakeSessions of self-administrationNicotine self-administrationIncreased nicotine intakeNicotine-related behaviorsSaccharin-flavored solutionInfluence of early exposureSeeking behaviorNo significant sex differencesSignificant sex differencesImpact of early exposureSaccharin exposureEarly exposureFlavored solutionNicotine addictionSex differencesNicotineL-type calcium channel regulation of depression, anxiety and anhedonia-related behavioral phenotypes following chronic stress exposure
Nunes E, Kebede N, Rajadhyaksha A, Addy N. L-type calcium channel regulation of depression, anxiety and anhedonia-related behavioral phenotypes following chronic stress exposure. Neuropharmacology 2024, 257: 110031. PMID: 38871116, PMCID: PMC11334593, DOI: 10.1016/j.neuropharm.2024.110031.Peer-Reviewed Original ResearchChronic unpredictable stressHome cage controlsElevated plus mazeForced swim testSucrose preference testCUS-induced decreaseChronic stress exposureImmobility timeStress exposureL-type calcium channelsDays of chronic unpredictable stressAnxiogenic-like behavioral responsesForced swim test immobility timeBehavioral responsesPre-existing mental health challengesAntidepressant-like responseOpen arm timeMood-related disordersRegulation of depressionExposure to chronic stressorsMale ratsL-type calcium channel blocker isradipineArm timePlus mazeSucrose preferenceThe Biological Psychiatry Cover Art Initiative: Addressing the Underrepresentation of Black People on the Journal Cover Through a Series of Commissioned Artworks
Krystal J, Addy N, Imeh I. The Biological Psychiatry Cover Art Initiative: Addressing the Underrepresentation of Black People on the Journal Cover Through a Series of Commissioned Artworks. Biological Psychiatry 2024, 95: s26. DOI: 10.1016/j.biopsych.2024.02.068.Peer-Reviewed Original ResearchThe Biological Psychiatry Cover Art Initiative: Addressing the Underrepresentation of Black People on the Journal Cover Through a Series of Commissioned Artworks
Krystal J, Imeh I, Garces R, Addy N. The Biological Psychiatry Cover Art Initiative: Addressing the Underrepresentation of Black People on the Journal Cover Through a Series of Commissioned Artworks. Biological Psychiatry 2024, 95: 2. PMID: 38030306, DOI: 10.1016/j.biopsych.2023.10.010.Peer-Reviewed Original ResearchThe impact of racism on Black American mental health
Cogburn C, Roberts S, Ransome Y, Addy N, Hansen H, Jordan A. The impact of racism on Black American mental health. The Lancet Psychiatry 2024, 11: 56-64. PMID: 38101873, DOI: 10.1016/s2215-0366(23)00361-9.Peer-Reviewed Original ResearchConceptsMental illnessMental healthUnfavorable health outcomesMental health systemMental health issuesDSM-5 classification systemEpidemiological surveyHealth outcomesInadequate treatmentAmerican mental healthHealth systemExperience disparitiesHealth issuesIllnessBlack individualsBlack AmericansBlack populationHealthClassification systemMorbidityMisdiagnosisDisparities
2023
Targeting the Actions of Muscarinic Receptors on Dopamine Systems: New Strategies for Treating Neuropsychiatric Disorders
Nunes E, Addy N, Conn P, Foster D. Targeting the Actions of Muscarinic Receptors on Dopamine Systems: New Strategies for Treating Neuropsychiatric Disorders. The Annual Review Of Pharmacology And Toxicology 2023, 64: 277-289. PMID: 37552895, PMCID: PMC10841102, DOI: 10.1146/annurev-pharmtox-051921-023858.Peer-Reviewed Original ResearchCholinergic neuronsMuscarinic acetylcholine receptor subtypesDA neuron activityMidbrain DA neuronsAcetylcholine receptor subtypesMood-related disordersPotential clinical implicationsDA circuitryDA neuronsDA releaseMuscarinic receptorsCholinergic regulationReceptor subtypesDopamine systemNeuron activityClinical implicationsNeuropsychiatric disordersDopamine signalingNumerous disordersSubtypesNumerous receptorsDisordersNeuronsReceptorsPublication dateVentral tegmental area M5 muscarinic receptors mediate effort-choice responding and nucleus accumbens dopamine in a sex-specific manner
Nunes E, Kebede N, Haight J, Foster D, Lindsley C, Conn P, Addy N. Ventral tegmental area M5 muscarinic receptors mediate effort-choice responding and nucleus accumbens dopamine in a sex-specific manner. Journal Of Pharmacology And Experimental Therapeutics 2023, 385: jpet-ar-2022-001438. PMID: 36828630, PMCID: PMC10108441, DOI: 10.1124/jpet.122.001438.Peer-Reviewed Original ResearchConceptsNucleus accumbens coreVentral tegmental areaM5 receptorsDA releaseMale ratsVTA infusionsDepressive disorderNucleus accumbensMuscarinic M5 receptorsSelective negative allosteric modulatorM5 muscarinic receptorsNegative allosteric modulatorsEffort-related choicePhasic DA releasePotential sex differencesSex-specific mannerACh toneVTA administrationCholinergic effectsMuscarinic receptorsFemale ratsTegmental areaPreclinical modelsDopamine releaseTherapeutic targetChapter 11 Cholinergic modulation of circuits
Addy N, Fowler C, Wickham R. Chapter 11 Cholinergic modulation of circuits. 2023, 409-444. DOI: 10.1016/b978-0-12-823453-2.00004-7.Chapters
2022
Chronic oral nicotine exposure decreases aversive taste of nicotine, increases nicotine withdrawal and reinstatement, but cherry flavor does not alter nicotine’s effects in adolescent rats
Bagdas D, Harris L, Addy N. Chronic oral nicotine exposure decreases aversive taste of nicotine, increases nicotine withdrawal and reinstatement, but cherry flavor does not alter nicotine’s effects in adolescent rats. Neuroscience Letters 2022, 793: 137008. PMID: 36476758, PMCID: PMC9948648, DOI: 10.1016/j.neulet.2022.137008.Peer-Reviewed Original ResearchConceptsTaste responsesNicotine concentrationsNicotine exposureNicotine withdrawalNicotine effectsAdolescent ratsChronic exposureOral nicotine exposureTaste reactivityAversive tasteChronic nicotine exposureDevelopment of toleranceLow nicotine concentrationsE-cigarette useE-cigarette flavoringsHigher nicotine concentrationsNicotine abstinenceNicotine useNaïve animalsChronic effectsNicotineRatsAversive responsesDifferent nicotine concentrationsWithdrawalL-type calcium channel regulation of dopamine activity in the ventral tegmental area to nucleus accumbens pathway: Implications for substance use, mood disorders and co-morbidities
Nunes E, Addy N. L-type calcium channel regulation of dopamine activity in the ventral tegmental area to nucleus accumbens pathway: Implications for substance use, mood disorders and co-morbidities. Neuropharmacology 2022, 224: 109336. PMID: 36414149, PMCID: PMC11215796, DOI: 10.1016/j.neuropharm.2022.109336.Peer-Reviewed Original ResearchConceptsL-type calcium channelsVentral tegmental areaPre-clinical modelsTegmental areaSubstance useLTCC blockersMood disordersCalcium channelsCo-morbid psychiatric diagnosesDA neuronal activityVoltage-gated calcium channelsMood-related behaviorsSubstance use disordersCalcium channel regulationStress-induced plasticityAccumbens pathwayCardiac medicationsDopamine neuronsLTCC subtypesNeuronal activityNeuronal firingUse disordersPsychiatric diagnosisCalcium entryDopamine activityCholinergic and dopaminergic‐mediated motivated behavior in healthy states and in substance use and mood disorders
Nunes EJ, Kebede N, Bagdas D, Addy NA. Cholinergic and dopaminergic‐mediated motivated behavior in healthy states and in substance use and mood disorders. Journal Of The Experimental Analysis Of Behavior 2022, 117: 404-419. PMID: 35286712, PMCID: PMC9743782, DOI: 10.1002/jeab.747.Peer-Reviewed Original ResearchConceptsMood disordersSubstance useActivational componentsMotivated behaviorComorbid substance useMesolimbic dopamine systemDA releaseCholinergic activityCholinergic transmissionImportant neuromodulatorCholinergic dysregulationDA regulationDopamine systemDA signalingActivational aspectsDisease statesDisordersAversive stimuliPossible roleHealthy stateCholinergicAcetylcholineStimuliEtiologyIllnessAnimal Models to Investigate the Impact of Flavors on Nicotine Addiction and Dependence
Bagdas D, Kebede N, Zepei AM, Harris L, Minanov K, Picciotto MR, Addy NA. Animal Models to Investigate the Impact of Flavors on Nicotine Addiction and Dependence. Current Neuropharmacology 2022, 20: 2175-2201. PMID: 35611777, PMCID: PMC9886843, DOI: 10.2174/1570159x20666220524120231.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus Statements
2020
Examining the role of muscarinic M5 receptors in VTA cholinergic modulation of depressive-like and anxiety-related behaviors in rats
Nunes EJ, Rupprecht LE, Foster DJ, Lindsley CW, Conn PJ, Addy NA. Examining the role of muscarinic M5 receptors in VTA cholinergic modulation of depressive-like and anxiety-related behaviors in rats. Neuropharmacology 2020, 171: 108089. PMID: 32268153, PMCID: PMC7313677, DOI: 10.1016/j.neuropharm.2020.108089.Peer-Reviewed Original ResearchConceptsSucrose preference testVentral tegmental areaMuscarinic M5 receptorsCholinergic toneM5 receptorsBehavioral effectsFemale ratsDepressive-like behavioral effectsIntra-VTA infusionAnxiogenic-like effectsAcetylcholinesterase inhibitor physostigmineAnxiety-related behaviorVTA administrationCholinergic modulationCholinergic receptorsMuscarinic receptorsInhibitor physostigmineSwim testTegmental areaMale ratsMood disordersVTA infusionsFST behaviorRatsPhysostigmine
2019
Cholinergic Receptor Blockade in the VTA Attenuates Cue-Induced Cocaine-Seeking and Reverses the Anxiogenic Effects of Forced Abstinence
Nunes EJ, Bitner L, Hughley SM, Small KM, Walton SN, Rupprecht LE, Addy NA. Cholinergic Receptor Blockade in the VTA Attenuates Cue-Induced Cocaine-Seeking and Reverses the Anxiogenic Effects of Forced Abstinence. Neuroscience 2019, 413: 252-263. PMID: 31271832, PMCID: PMC6661179, DOI: 10.1016/j.neuroscience.2019.06.028.Peer-Reviewed Original ResearchConceptsCue-induced cocaineAnxiety-related behaviorDrug relapseOpen arm timeCholinergic receptor blockadeCocaine abstinenceVentral tegmental areaSubstance abuseSelf-administer intravenous cocaineMuscarinic receptor antagonist scopolaminePeriod of abstinenceAnxiogenic effectsReceptor blockadeCholinergic mechanismsCocaine-naïve ratsNicotinic acetylcholine receptor antagonist mecamylamineMale Sprague-Dawley ratsDrug abstinenceSprague-Dawley ratsDose-dependent increaseCocaine-naive ratsAntagonist scopolamineEPM behaviorSaline ratsAbstinence
2018
The L-type calcium channel blocker, isradipine, attenuates cue-induced cocaine-seeking by enhancing dopaminergic activity in the ventral tegmental area to nucleus accumbens pathway
Addy NA, Nunes EJ, Hughley SM, Small KM, Baracz SJ, Haight JL, Rajadhyaksha AM. The L-type calcium channel blocker, isradipine, attenuates cue-induced cocaine-seeking by enhancing dopaminergic activity in the ventral tegmental area to nucleus accumbens pathway. Neuropsychopharmacology 2018, 43: 2361-2372. PMID: 29773910, PMCID: PMC6180103, DOI: 10.1038/s41386-018-0080-2.Peer-Reviewed Original ResearchConceptsL-type calcium channelsCocaine relapseLever depressionVentral tegmental areaCocaine self-administration trainingOriginal training contextLight cue presentationSelf-administration trainingSubjective effectsCocaine-seeking behaviorTegmental areaBehavioral effectsCocaine's subjective effectsL-type calcium channel blockerCue presentationMale Sprague-Dawley ratsTraining contextCocaine cuesNucleus accumbens coreNatural rewardsDA receptor activationCalcium channel blockersSprague-Dawley ratsPhasic dopaminePotential therapeutic target
2017
Evaluating oral flavorant effects on nicotine self-administration behavior and phasic dopamine signaling
Wickham RJ, Nunes EJ, Hughley S, Silva P, Walton SN, Park J, Addy NA. Evaluating oral flavorant effects on nicotine self-administration behavior and phasic dopamine signaling. Neuropharmacology 2017, 128: 33-42. PMID: 28943284, PMCID: PMC5714675, DOI: 10.1016/j.neuropharm.2017.09.029.Peer-Reviewed Original ResearchConceptsSelf-administration behaviorNucleus accumbensNicotine self-administration behaviorIntravenous self-administration paradigmFast-scan cyclic voltammetryPublic health policy decisionsPhasic DA signalingTobacco product useProgressive ratio taskSelf-administration paradigmTwo-bottle choice testPhasic DA releaseHealth policy decisionsTobacco product regulationOral mentholOral nicotineOral sucroseNicotine administrationPreclinical findingsDA releaseMale ratsOral administrationSmoking behaviorNicotine aversionMenthol effectsEnhancing VTA Cav1.3 L-type Ca2+ channel activity promotes cocaine and mood-related behaviors via overlapping AMPA receptor mechanisms in the nucleus accumbens
Martínez-Rivera A, Hao J, Tropea TF, Giordano TP, Kosovsky M, Rice RC, Lee A, Huganir RL, Striessnig J, Addy NA, Han S, Rajadhyaksha AM. Enhancing VTA Cav1.3 L-type Ca2+ channel activity promotes cocaine and mood-related behaviors via overlapping AMPA receptor mechanisms in the nucleus accumbens. Molecular Psychiatry 2017, 22: 1735-1745. PMID: 28194001, PMCID: PMC5555837, DOI: 10.1038/mp.2017.9.Peer-Reviewed Original ResearchMeSH KeywordsAffectAnimalsCalcium Channels, L-TypeCocaineCocaine-Related DisordersConditioning, PsychologicalDepressionDisease Models, AnimalDopamine Uptake InhibitorsGenetic Association StudiesHumansMaleMice, Inbred C57BLMice, TransgenicMotor ActivityNucleus AccumbensPost-Synaptic DensityReceptors, AMPASocial BehaviorVentral Tegmental AreaConceptsDepressive-like behaviorCav1.3 L-type Ca2L-type Ca2Receptor mechanismsCalcium-permeable α-aminoCACNA1D geneCav1.3 channelsRole of Cav1.3Depressive-like phenotypeMood-related behaviorsDepression-related phenotypesSocial behavioral deficitsNeuropsychiatric symptomsBehavioral deficitsMood disordersCP-AMPARNAc shellRodent studiesGluA1 phosphorylationHuman studiesNAc corePlace preferenceBipolar disorderPsychomotor activityCav1.3
2016
Chapter 38 Clinical Syndromes of Substance Use Disorder
Addy N, Solecki W. Chapter 38 Clinical Syndromes of Substance Use Disorder. 2016, 619-634. DOI: 10.1016/b978-0-12-800105-9.00038-x.Peer-Reviewed Original ResearchSubstance use disordersUse disordersGenetic adaptationEpigenetic processesGenetic mechanismsDrug-mediated changesSpecific neuronal circuitsIntracellular signalingClinical syndromeSuccessful treatmentSynaptic physiologyNeuronal circuitsCurrent understandingNeurobiological processesOngoing studiesSeminal findingsDisordersGenesSignalingSyndromePathwayPhysiologySusceptibilityNeurotransmitters
2015
Examination of Rapid Dopamine Dynamics with Fast Scan Cyclic Voltammetry During Intra-oral Tastant Administration in Awake Rats
Wickham R, Park J, Nunes E, Addy N. Examination of Rapid Dopamine Dynamics with Fast Scan Cyclic Voltammetry During Intra-oral Tastant Administration in Awake Rats. Journal Of Visualized Experiments 2015 DOI: 10.3791/52468-v.Peer-Reviewed Original Research
2010
Sensitization of Rapid Dopamine Signaling in the Nucleus Accumbens Core and Shell After Repeated Cocaine in Rats
Addy N, Daberkow D, Ford J, Garris P, Wightman R. Sensitization of Rapid Dopamine Signaling in the Nucleus Accumbens Core and Shell After Repeated Cocaine in Rats. Journal Of Neurophysiology 2010, 104: 922-931. PMID: 20554845, PMCID: PMC2934942, DOI: 10.1152/jn.00413.2010.Peer-Reviewed Original ResearchConceptsAcute cocaine challengeCocaine challengeNucleus accumbens coreWithdrawal periodDopamine sensitizationShort withdrawal periodDopamine releaseDopamine neurotransmissionFast-scan cyclic voltammetryAccumbens coreMale Sprague-Dawley ratsSubsequent cocaine challengeSprague-Dawley ratsLonger withdrawal periodsCocaine-treated subjectsPre-exposed subjectsRepeated CocaineDaily injectionsAcute cocaineDopaminergic responseCocaine exposureDopamine overflowNAc coreDopamine uptakeUptake inhibition