2002
The Effect of Tryptophan Depletion on Alcohol Self‐Administration in Non‐Treatment‐Seeking Alcoholic Individuals
Petrakis IL, Buonopane A, O'Malley S, Cermik O, Trevisan L, Boutros NN, Limoncelli D, Krystal JH. The Effect of Tryptophan Depletion on Alcohol Self‐Administration in Non‐Treatment‐Seeking Alcoholic Individuals. Alcohol Clinical And Experimental Research 2002, 26: 969-975. PMID: 12170105, DOI: 10.1111/j.1530-0277.2002.tb02629.x.Peer-Reviewed Original ResearchConceptsTest sessionsActive tryptophan depletionSelf-reported cravingTryptophan depletionFavorite alcoholic beverageCue exposure sessionsAmount of alcoholAmino acid drinkSelf-administration paradigmAlcohol-dependent individualsAlcohol self-administrationAlcohol use disorderDependence of alcoholNeurobiological mechanismsExposure sessionsSubjective intoxicationBlood alcohol levelsPriming drinkAlcohol useAcid drinkUse disordersAlcoholic individualsAlcohol dependenceCravingTest dayTryptophan Depletion Alters the Decision-Making of Healthy Volunteers through Altered Processing of Reward Cues
Rogers R, Tunbridge E, Bhagwagar Z, Drevets W, Sahakian B, Carter C. Tryptophan Depletion Alters the Decision-Making of Healthy Volunteers through Altered Processing of Reward Cues. Neuropsychopharmacology 2002, 28: 153-162. PMID: 12496952, DOI: 10.1038/sj.npp.1300001.Peer-Reviewed Original ResearchConceptsAmino acid drinkReward cuesOrbitofrontal cortexNegative outcomesReduced discriminationAltered processingTryptophan depletionHuman choiceCuesMonoamine neurotransmitter systemsAltered discriminationNeurotransmitter systemsBiasesDiscriminationCortexGamblesProcessingPsychiatric illnessCognitionHealthy volunteersAnhedoniaMoodFunctioningPresent studyLittle evidence
2001
Effect of Tryptophan Depletion on Alcohol Cue‐Induced Craving in Abstinent Alcoholic Patients
Petrakis I, Trevisan L, Boutros N, Limoncelli D, Cooney N, Krystal J. Effect of Tryptophan Depletion on Alcohol Cue‐Induced Craving in Abstinent Alcoholic Patients. Alcohol Clinical And Experimental Research 2001, 25: 1151-1155. PMID: 11505046, DOI: 10.1111/j.1530-0277.2001.tb02329.x.Peer-Reviewed Original ResearchConceptsCue-induced cravingAlcohol-dependent patientsTryptophan depletionAlcohol cue-induced cravingDouble-blind fashionPlasma free tryptophanAbstinent alcoholic patientsAmino acid drinkActive tryptophan depletionAlcoholic patientsSerotonin synthesisAcid drinkSober alcoholicsAlcoholic individualsPrecursor tryptophanCue exposurePatientsAlcohol useAbstinent alcoholic individualsCravingFree tryptophanAlcohol cuesTest dayGreater increaseSimilar drinks
1999
Tryptophan-depletion challenge in depressed patients treated with desipramine or fluoxetine: implications for the role of serotonin in the mechanism of antidepressant action
Delgado P, Miller H, Salomon R, Licinio J, Krystal J, Moreno F, Heninger G, Charney D. Tryptophan-depletion challenge in depressed patients treated with desipramine or fluoxetine: implications for the role of serotonin in the mechanism of antidepressant action. Biological Psychiatry 1999, 46: 212-220. PMID: 10418696, DOI: 10.1016/s0006-3223(99)00014-1.Peer-Reviewed Original ResearchConceptsTRP depletionAntidepressant responseDepressed patientsSuccessful antidepressant treatmentBrain serotonin contentSignificant depressive symptomsAmino acid drinkRole of serotoninMonoamine oxidase inhibitorsRelationship of relapseAntidepressant actionAntidepressant treatmentReuptake inhibitorsPlasma tryptophanPlasma levelsAntidepressant typeTherapeutic responseDepressive relapseSerotonin contentTherapeutic effectTRP levelsDepressive symptomsTreatment phasePatientsAcid drink
1998
Tryptophan Depletion During Continuous CSF Sampling in Healthy Human Subjects
Carpenter L, Anderson G, Pelton G, Gudin J, Kirwin P, Price L, Heninger G, McDougle C. Tryptophan Depletion During Continuous CSF Sampling in Healthy Human Subjects. Neuropsychopharmacology 1998, 19: 26-35. PMID: 9608574, DOI: 10.1016/s0893-133x(97)00198-x.Peer-Reviewed Original ResearchConceptsAmino acid drinkCerebrospinal fluidAcid drinkTRP levelsLow TRP dietTryptophan depletion paradigmBrain serotonin levelsPlasma TRP levelsHealthy adult subjectsHealthy human subjectsCSF TRP levelsPlasma TrpIndwelling catheterLumbar punctureSerotonin levelsTryptophan depletionContinuous cerebrospinal fluidSpecial dietAdult subjectsBehavioral effectsPlasma samplesHuman subjectsCorresponding fallCentral levelNadir
1997
Lack of behavioral effects of monoamine depletion in healthy subjects
Salomon R, Miller H, Krystal J, Heninger G, Charney D. Lack of behavioral effects of monoamine depletion in healthy subjects. Biological Psychiatry 1997, 41: 58-64. PMID: 8988796, DOI: 10.1016/0006-3223(95)00670-2.Peer-Reviewed Original ResearchConceptsAmino acid drinkHealthy subjectsAcid drinkTryptophan-free amino acid drinkBehavioral effectsTyrosine hydroxylase inhibitorTest sessionsMonoamine depletionMonoamine hypothesisPara-tyrosineCombined administrationAlpha-methylHydroxylase inhibitorDrinksSubjectsSessionsAMPTCatecholaminesAdministration
1995
Tryptophan depletion and attenuation of cue-induced craving for cocaine
Satel SL, Krystal JH, Delgado PL, Kosten TR, Charney DS. Tryptophan depletion and attenuation of cue-induced craving for cocaine. American Journal Of Psychiatry 1995, 152: 778-783. PMID: 7726319, DOI: 10.1176/ajp.152.5.778.Peer-Reviewed Original ResearchConceptsCue-induced cravingTryptophan depletionPlacebo conditionPotent serotonin reuptake blockerCue exposureSerotonin reuptake blockersDouble-blind designAmino acid drinkVisual analogue ratingsCocaine-dependent patientsAnalogue ratingsReuptake blockerAcute reductionPlasma levelsSerotonergic systemMale inpatientsAcid drinkTryptophan levelsDrug usePatientsCocaine useCocaineRelapseCravingTest sessions
1994
Tryptophan Depletion in Patients With Obsessive-Compulsive Disorder Who Respond to Serotonin Reuptake Inhibitors
Barr LC, Goodman WK, McDougle CJ, Delgado PL, Heninger GR, Charney DS, Price LH. Tryptophan Depletion in Patients With Obsessive-Compulsive Disorder Who Respond to Serotonin Reuptake Inhibitors. JAMA Psychiatry 1994, 51: 309-317. PMID: 8161291, DOI: 10.1001/archpsyc.1994.03950040053007.Peer-Reviewed Original ResearchConceptsShort-term tryptophan depletionSerotonin reuptake inhibitorsTryptophan depletionReuptake inhibitorsObsessive-compulsive disorderFree plasma tryptophan levelsPlacebo-controlled cross-over designLow tryptophan dietPlasma tryptophan levelsAmino acid drinkCross-over designDepression ratingsDepressive symptomsSymptom reductionAcid drinkTryptophan levelsDSM-IIIPatientsNext morningCompulsive symptomsSymptomsDisordersDietInhibitorsDrinks
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