2024
Pulsed nicotine infusions as a model for smoking: validating a tool to explore nicotine thresholds in humans
Parida S, MacLean R, Gueorguieva R, Sofuoglu M. Pulsed nicotine infusions as a model for smoking: validating a tool to explore nicotine thresholds in humans. Psychopharmacology 2024, 241: 1915-1922. PMID: 38970644, DOI: 10.1007/s00213-024-06609-6.Peer-Reviewed Original ResearchDiscriminative stimulus effectsAddiction thresholdNicotine doseDiscriminative stimulus effects of nicotineStimulus effects of nicotineNicotine deliveryEffects of nicotineOvernight abstinenceStimulus effectsNicotine infusionSubjective effectsTest sessionsNicotineMethodsEleven participantsInfusion procedureLow dosesParticipantsThreshold doseConclusionsTheseAbstinenceDoseHeart rateInfusionSmokingObjectivesTo
2023
Sex steroid hormone levels associated with dopamine D2/3 receptor availability in people who smoke cigarettes
Zakiniaeiz Y, Gueorguieva R, Peltier M, Verplaetse T, Roberts W, McKee S, Cosgrove K. Sex steroid hormone levels associated with dopamine D2/3 receptor availability in people who smoke cigarettes. Frontiers In Behavioral Neuroscience 2023, 17: 1192740. PMID: 37358969, PMCID: PMC10288103, DOI: 10.3389/fnbeh.2023.1192740.Peer-Reviewed Original ResearchSex steroid hormone levelsSteroid hormone levelsLow estradiol levelsTobacco smokingSex-matched counterpartsHormone levelsFree testosteroneEstradiol levelsAmphetamine administrationR availabilityPositron emission tomography scanPrimary addictive componentEmission tomography scanDopamine D2/3 receptor availabilityEffects of nicotineSex steroid hormonesAge-matched controlsCortical brain regionsD2/3 receptor availabilityNicotinic acetylcholine receptorsSex differencesDorsolateral prefrontal cortexDrug-taking behaviorDopaminergic actionsAddictive component
2022
Impact of delivery rate on the acute response to intravenous nicotine: A human laboratory study with implications for regulatory science
De Aquino JP, MacLean RR, Gueorguieva R, DeVito EE, Eid T, Sofuoglu M. Impact of delivery rate on the acute response to intravenous nicotine: A human laboratory study with implications for regulatory science. Addiction Biology 2022, 27: e13161. PMID: 35229960, PMCID: PMC8903077, DOI: 10.1111/adb.13161.Peer-Reviewed Original ResearchConceptsAbuse potentialPositive subjective drug effectsSubjective drug effectsHuman laboratory studiesPositive subjective effectsAttention functionSmoking urgesOvernight abstinencePotential therapeutic effectsEffects of nicotineHeart rate increaseDelivery rateDependent smokersExperimental sessionsSubjective effectsNicotine dependenceIntravenous nicotineBlood pressureSaline infusionAcute effectsTherapeutic effectHeart rateDrug effectsAcute responseCrossover design
2020
Differential effects of nicotine delivery rate on subjective drug effects, urges to smoke, heart rate and blood pressure in tobacco smokers
Jensen KP, Valentine G, Gueorguieva R, Sofuoglu M. Differential effects of nicotine delivery rate on subjective drug effects, urges to smoke, heart rate and blood pressure in tobacco smokers. Psychopharmacology 2020, 237: 1359-1369. PMID: 31996940, PMCID: PMC7386792, DOI: 10.1007/s00213-020-05463-6.Peer-Reviewed Original ResearchConceptsSubjective drug effectsBlood pressureHeart rateDrug effectsSmoking urgesDifferential effectsBlood pressure increaseBody weight doseEffects of nicotineDelivery rateGreater heart rateAmount of nicotineWeight doseFemale smokersTobacco smokersAbstinence symptomsNicotine doseSaline infusionInfusion protocolNon-treatment seekingTobacco cigarettesHuman studiesInfusionTobacco productsNicotine