2024
CONNEX, a Phase III Randomized Trial Program Assessing Efficacy and Safety of Iclepertin in Schizophrenia: Recruitment and Baseline Characteristics
Blahova Z, Ikezawa S, Falkai P, Krystal J, Rangan T. CONNEX, a Phase III Randomized Trial Program Assessing Efficacy and Safety of Iclepertin in Schizophrenia: Recruitment and Baseline Characteristics. BJPsych Open 2024, 10: s72-s73. DOI: 10.1192/bjo.2024.230.Peer-Reviewed Original ResearchVirtual Reality Functional Capacity Assessment ToolComposite T-scoreSchizophrenia Cognition Rating ScaleSchizophrenia Consensus Cognitive BatteryCognitive impairmentGlycine transporter-1 inhibitorStable antipsychotic treatmentN-methyl-d-aspartate receptor signallingConsensus Cognitive BatteryCognitive remediation therapyIncrease synaptic levelsCognition Rating ScaleT-scoreDuration of illnessCo-agonist glycineAntipsychotic treatmentAntipsychotic medicationSchizophrenia treatmentCognitive batteryRemediation therapyCognitive symptomsTreatment researchSchizophreniaImprove cognitionPlacebo-controlled parallel-group trialIllusory generalizability of clinical prediction models
Chekroud A, Hawrilenko M, Loho H, Bondar J, Gueorguieva R, Hasan A, Kambeitz J, Corlett P, Koutsouleris N, Krumholz H, Krystal J, Paulus M. Illusory generalizability of clinical prediction models. Science 2024, 383: 164-167. PMID: 38207039, DOI: 10.1126/science.adg8538.Peer-Reviewed Original Research
2012
Glycine treatment of the risk syndrome for psychosis: Report of two pilot studies
Woods SW, Walsh BC, Hawkins KA, Miller TJ, Saksa JR, D'Souza DC, Pearlson GD, Javitt DC, McGlashan TH, Krystal JH. Glycine treatment of the risk syndrome for psychosis: Report of two pilot studies. European Neuropsychopharmacology 2012, 23: 931-940. PMID: 23089076, PMCID: PMC4028140, DOI: 10.1016/j.euroneuro.2012.09.008.Peer-Reviewed Original ResearchConceptsPilot studyRisk syndromeSyndrome patientsNegative symptomsShort-term pilot studyEffect sizeAdjunctive antipsychotic medicationOpen-label studyPatients meeting criteriaNMDA receptor functionDurability of effectPsychosis risk symptomsGlycine site agonistsGroup effect sizesWeeks of evaluationAntipsychotic medicationSyndrome subjectsPromising effect sizesTreatment needsLarge effect sizesMeeting criteriaCognitive impairmentReduced symptomsReceptor functionSymptoms
2011
Challenges in the design and conduct of controlled clinical effectiveness trials in schizophrenia
Rosenheck RA, Krystal JH, Lew R, Barnett PG, Thwin SS, Fiore L, Valley D, Huang GD, Neal C, Vertrees JE, Liang MH. Challenges in the design and conduct of controlled clinical effectiveness trials in schizophrenia. Clinical Trials 2011, 8: 196-204. PMID: 21270143, DOI: 10.1177/1740774510392931.Peer-Reviewed Original ResearchConceptsSchizo-affective disorderAntipsychotic medicationUsual careMedication adherenceEffectiveness trialCommon co-morbid illnessesCo-morbid illnessHigh-risk patientsComparative effectiveness trialClinical effectiveness trialVeterans Health AdministrationNew antipsychotic medicationsTreatment of schizophreniaPsychiatric inpatient hospitalizationQuality of lifeHealth care costsElectronic medical recordsLong-term trialsPatient's psychiatristPrimary endpointSecondary endpointsFirst hospitalizationRecent hospitalizationInjectable risperidoneUnstable patients
2007
Lamotrigine as Add-On Therapy in Schizophrenia
Goff DC, Keefe R, Citrome L, Davy K, Krystal JH, Large C, Thompson TR, Volavka J, Webster EL. Lamotrigine as Add-On Therapy in Schizophrenia. Journal Of Clinical Psychopharmacology 2007, 27: 582-589. PMID: 18004124, DOI: 10.1097/jcp.0b013e31815abf34.Peer-Reviewed Original ResearchMeSH KeywordsAdultAnticonvulsantsAntipsychotic AgentsClozapineDiagnostic and Statistical Manual of Mental DisordersDose-Response Relationship, DrugDouble-Blind MethodDrug Administration ScheduleDrug ResistanceDrug Therapy, CombinationFemaleHumansLamotrigineMaleMiddle AgedPatient CompliancePatient DropoutsPsychiatric Status Rating ScalesSchizophreniaSeverity of Illness IndexSuicide, AttemptedTreatment OutcomeTriazinesConceptsNegative Syndrome Scale total scoreScale total scoreAntipsychotic medicationTotal scoreTreatment groupsSchizophrenia patientsPlacebo-controlled trialPrimary end pointParallel-group trialUse of lamotrigineClinical Global ImpressionAtypical antipsychotic medicationsResidual psychotic symptomsSymptom total scoreNegative Symptoms total scoreLamotrigine augmentationLamotrigine trialsRefractory psychosisAtypical antipsychoticsCognitive composite scoreWeek 12Global ImpressionTreat samplePsychotic symptomsLamotrigine
2005
Mazindol Augmentation of Antipsychotic Treatment for Schizophrenic Patients with Comorbid Cocaine Abuse or Dependence
Perry E, Gil R, Miles D, Brenner L, Macdougall L, Johnson R, Degen K, Gueorguieva R, Petrakis I, Krystal J, D'Souza D. Mazindol Augmentation of Antipsychotic Treatment for Schizophrenic Patients with Comorbid Cocaine Abuse or Dependence. Journal Of Dual Diagnosis 2005, 1: 37-47. DOI: 10.1300/j374v01n01_04.Peer-Reviewed Original ResearchCocaine abusePsychiatric symptomsCocaine cravingCatecholamine reuptake inhibitorCurrent antipsychotic medicationsCocaine consumptionPlacebo groupAntipsychotic pharmacotherapyReuptake inhibitorsAntipsychotic medicationAntipsychotic treatmentComorbid schizophreniaSchizoaffective patientsSubstance abuse issuesSchizophrenic patientsPatientsSchizoaffective disorderSchizophrenia patientsNatural historyMazindolPilot studyGroup therapySchizophreniaSymptomsAbuse issues
2003
Transcranial Magnetic Stimulation of Left Temporoparietal Cortex and Medication-Resistant Auditory Hallucinations
Hoffman RE, Hawkins KA, Gueorguieva R, Boutros NN, Rachid F, Carroll K, Krystal JH. Transcranial Magnetic Stimulation of Left Temporoparietal Cortex and Medication-Resistant Auditory Hallucinations. JAMA Psychiatry 2003, 60: 49-56. PMID: 12511172, DOI: 10.1001/archpsyc.60.1.49.Peer-Reviewed Original ResearchConceptsRepetitive transcranial magnetic stimulationMedication-resistant auditory hallucinationsTranscranial magnetic stimulationLeft temporoparietal cortexAuditory hallucinationsSham stimulationMagnetic stimulationTemporoparietal cortexOpen-label trialMotor thresholdAntipsychotic medicationSustained reductionBrain areasSchizoaffective disorderCortical activationPossible treatmentNeuropsychological impairmentNeuropsychological assessmentPatientsAdditional studiesCortexStimulationTrialsHallucinationsTreatment effects
1998
Creatine Kinase Elevations and Aggressive Behavior in Hospitalized Forensic Patients
Hillbrand M, Spitz R, Foster H, Krystal J, Young J. Creatine Kinase Elevations and Aggressive Behavior in Hospitalized Forensic Patients. Psychiatric Quarterly 1998, 69: 69-82. PMID: 9536476, DOI: 10.1023/a:1022137524475.Peer-Reviewed Original ResearchConceptsCK levelsAntipsychotic medicationCreatine kinaseViolent patientsCreatine kinase elevationHigh CK levelsAggressive behaviorProspective studyPatientsClinical diagnosisBiological markersPotential predictorsForensic patientsForensic hospitalMedicationsViolent behaviorSubsequent violenceLevelsHospitalDiagnosis