2022
Sex differences in the acute effects of intravenous (IV) delta-9 tetrahydrocannabinol (THC)
Bassir Nia A, Orejarena MJ, Flynn L, Luddy C, D’Souza D, Skosnik PD, Pittman B, Ranganathan M. Sex differences in the acute effects of intravenous (IV) delta-9 tetrahydrocannabinol (THC). Psychopharmacology 2022, 239: 1621-1628. PMID: 35438304, PMCID: PMC11215802, DOI: 10.1007/s00213-022-06135-3.Peer-Reviewed Original ResearchMeSH KeywordsCannabinoid Receptor AgonistsCannabisDouble-Blind MethodDronabinolFemaleHallucinogensHumansMaleSex CharacteristicsConceptsRey Auditory Verbal Learning TaskPsychotomimetic States InventoryCognitive effectsAuditory Verbal Learning TaskSubjective effectsDelta-9-TetrahydrocannabinolSex differencesVerbal learning taskDissociative Symptoms ScaleFemale participantsMain psychoactive constituentSignificant main effectPerceptual alterationsLearning taskStates InventoryPsychoactive constituentSignificant sex differencesMain effectMale participantsVisual analog scaleSymptom ScaleTest dayEffects of cannabinoidsParticipantsPsychotomimetic effects
2020
Psychosis-Relevant Effects of Intravenous Delta-9-Tetrahydrocannabinol: A Mega Analysis of Individual Participant-Data from Human Laboratory Studies
Ganesh S, Cortes-Briones J, Ranganathan M, Radhakrishnan R, Skosnik PD, D’Souza D. Psychosis-Relevant Effects of Intravenous Delta-9-Tetrahydrocannabinol: A Mega Analysis of Individual Participant-Data from Human Laboratory Studies. The International Journal Of Neuropsychopharmacology 2020, 23: 559-570. PMID: 32385508, PMCID: PMC7710917, DOI: 10.1093/ijnp/pyaa031.Peer-Reviewed Original ResearchMeSH KeywordsAdultCannabinoid Receptor AgonistsDose-Response Relationship, DrugDronabinolFemaleHumansMalePsychoses, Substance-InducedRandomized Controlled Trials as TopicConceptsHuman laboratory studiesHealthy human volunteersPositive symptomsTHC dosePsychotomimetic effectsHuman volunteersPsychosis-like effectsNegative Syndrome ScaleProfile of symptomsCrossover studyIntravenous administrationMotor retardationHealthy individualsSyndrome ScaleSymptomsNegative syndromeSomatic concernsSubstance useConceptual disorganizationFrequent cannabisMultiple studiesMeaningful increase
2019
Highs and lows of cannabinoid-dopamine interactions: effects of genetic variability and pharmacological modulation of catechol-O-methyl transferase on the acute response to delta-9-tetrahydrocannabinol in humans
Ranganathan M, De Aquino JP, Cortes-Briones JA, Radhakrishnan R, Pittman B, Bhakta S, D’Souza D. Highs and lows of cannabinoid-dopamine interactions: effects of genetic variability and pharmacological modulation of catechol-O-methyl transferase on the acute response to delta-9-tetrahydrocannabinol in humans. Psychopharmacology 2019, 236: 3209-3219. PMID: 31187152, DOI: 10.1007/s00213-019-05273-5.Peer-Reviewed Original ResearchConceptsCOMT rs4680 polymorphismMemory deficitsCOMT genotypeVal/Val individualsRs4680 polymorphismSubjective effectsTest dayCatechol-O-methyl transferase (COMT) enzymePsychotomimetic effectsCognitive effectsCognitive dataCannabinoid-dopamine interactionsAcute responseHuman brainIntravenous THCPlacebo-controlled studyRole of dopaminergicCatechol-O-methyl transferaseDopaminergic signalingAcute pharmacological inhibitionDeficitsCannabinoid effectsDopaminergic toneHealthy subjectsDrug development efforts
2018
The dose-dependent psychomotor effects of intravenous delta-9-tetrahydrocannabinol (Δ9-THC) in humans
Boggs DL, Cortes-Briones JA, Surti T, Luddy C, Ranganathan M, Cahill JD, Sewell AR, D’Souza D, Skosnik PD. The dose-dependent psychomotor effects of intravenous delta-9-tetrahydrocannabinol (Δ9-THC) in humans. Journal Of Psychopharmacology 2018, 32: 1308-1318. PMID: 30255720, DOI: 10.1177/0269881118799953.Peer-Reviewed Original ResearchConceptsFine motor controlPsychomotor effectsMotor functionPsychomotor functionCannabinoid receptor type 1Motor controlGross motor functionDose-related effectsObserved dose-dependent increaseDose-dependent increaseDose-dependent deficitsMotor timingReceptor type 1Gross motor performancePotential neural mechanismsCambridge Neuropsychological TestMotor deficitsBasal gangliaBlood levelsMotor impairmentDrug conditionsPartial agonistGrooved Pegboard taskSustained attentionType 1
2016
Human Laboratory Studies on Cannabinoids and Psychosis
Sherif M, Radhakrishnan R, D’Souza D, Ranganathan M. Human Laboratory Studies on Cannabinoids and Psychosis. Biological Psychiatry 2016, 79: 526-538. PMID: 26970363, DOI: 10.1016/j.biopsych.2016.01.011.BooksConceptsCannabinoid agonistsPsychotomimetic effectsAcute psychotomimetic effectsHealthy control subjectsCrossover laboratory studyEffects of ketamineHuman laboratory studiesGamma-aminobutyric acidHealthy human subjectsSelf-medication hypothesisTransient exacerbationAntipsychotic medicationControl subjectsDopamine metabolismGlutamate systemDopamine releasePsychotomimetic drugsCognitive symptomsDrug AdministrationAgonistsMagnitude of effectSymptomsSchizophreniaCannabinoidsLaboratory studies