2022
Nongenetic Factors Associated With Psychotic Experiences Among UK Biobank Participants
Lin B, Pries L, Sarac H, van Os J, Rutten B, Luykx J, Guloksuz S. Nongenetic Factors Associated With Psychotic Experiences Among UK Biobank Participants. JAMA Psychiatry 2022, 79: 857-868. PMID: 35857297, PMCID: PMC9301596, DOI: 10.1001/jamapsychiatry.2022.1655.Peer-Reviewed Original ResearchAge- and sex-specific associations between risk scores for schizophrenia and self-reported health in the general population
Paquin V, Pries L, ten Have M, Bak M, Gunther N, de Graaf R, van Dorsselaer S, Lin B, van Eijk K, Kenis G, Richards A, O’Donovan M, Luykx J, Rutten B, van Os J, Shah J, Guloksuz S. Age- and sex-specific associations between risk scores for schizophrenia and self-reported health in the general population. Social Psychiatry And Psychiatric Epidemiology 2022, 58: 43-52. PMID: 35913550, PMCID: PMC9845157, DOI: 10.1007/s00127-022-02346-3.Peer-Reviewed Original ResearchConceptsSex-specific associationsSelf-reported healthPRS-SCZES-SCZPhysical healthGeneral populationNetherlands Mental Health SurveyIncidence Study-2Mental Health SurveyHealth SurveyRisk scoreAge 65Common genetic variantsHealth correlatesAge 18Poor healthOlder individualsMental healthPolygenic riskLinear mixed modelsAgeSexExposome scoreHealthAssociation
2021
Schizophrenia and the Environment: Within-Person Analyses May be Required to Yield Evidence of Unconfounded and Causal Association—The Example of Cannabis and Psychosis
van Os J, Pries L, Have M, de Graaf R, van Dorsselaer S, Bak M, Wittchen H, Rutten B, Guloksuz S. Schizophrenia and the Environment: Within-Person Analyses May be Required to Yield Evidence of Unconfounded and Causal Association—The Example of Cannabis and Psychosis. Schizophrenia Bulletin 2021, 47: 594-603. PMID: 33693921, PMCID: PMC8084443, DOI: 10.1093/schbul/sbab019.Peer-Reviewed Original ResearchConceptsFixed-effects modelCannabis usePsychotic experiencesGeneral population cohortRandom-effects modelMental health outcomesRisk factorsTime-varying confoundersProspective associationsPopulation cohortHealth outcomesOwn controlCausal associationPsychosisCannabisLongitudinal studyAssociationBetween-person levelConfoundersCohortIncidenceSchizophrenia
2020
Association of Recent Stressful Life Events With Mental and Physical Health in the Context of Genomic and Exposomic Liability for Schizophrenia
Pries L, van Os J, Have M, de Graaf R, van Dorsselaer S, Bak M, Lin B, van Eijk K, Kenis G, Richards A, O’Donovan M, Luykx J, Rutten B, Guloksuz S. Association of Recent Stressful Life Events With Mental and Physical Health in the Context of Genomic and Exposomic Liability for Schizophrenia. JAMA Psychiatry 2020, 77: 1296-1304. PMID: 32805017, PMCID: PMC7711318, DOI: 10.1001/jamapsychiatry.2020.2304.Peer-Reviewed Original ResearchConceptsRecent stressful life eventsStressful life eventsAssociations of SLEsPoor physical healthMental health outcomesHealth outcomesPhysical healthGeneral populationPopulation-based prospective cohort studyPRS-SCZNetherlands Mental Health SurveyES-SCZMental healthProspective cohort studyIncidence Study-2Modifiable environmental factorsAdulthood stressful life eventsMental Health SurveyDutch general populationPoor mental healthPopulation-based health outcomesLife eventsCohort studyMean ageHealth SurveyPredictive Performance of Exposome Score for Schizophrenia in the General Population
Pries L, Erzin G, van Os J, Have M, de Graaf R, van Dorsselaer S, Bak M, Rutten B, Guloksuz S. Predictive Performance of Exposome Score for Schizophrenia in the General Population. Schizophrenia Bulletin 2020, 47: 277-283. PMID: 33215211, PMCID: PMC7965069, DOI: 10.1093/schbul/sbaa170.Peer-Reviewed Original ResearchConceptsES-SCZOptimal cut pointGeneral populationPopulation cohortGeneral population cohortCut pointsExposome scoreSchizophrenia spectrum disordersMeta-analytical estimatesClinical outcomesRisk strataRisk stratificationMulticausal etiologyMedical outcomesPsychiatric diagnosisBipolar disorderSchizophrenia diagnosisExposure scoreSuicide planSum scoreGene-environment interaction studiesSchizophreniaRisk predictionCharacteristic curveScoresDo Current Measures of Polygenic Risk for Mental Disorders Contribute to Population Variance in Mental Health?
Marsman A, Pries L, Have M, de Graaf R, van Dorsselaer S, Bak M, Kenis G, Lin B, Luykx J, Rutten B, Guloksuz S, van Os J. Do Current Measures of Polygenic Risk for Mental Disorders Contribute to Population Variance in Mental Health? Schizophrenia Bulletin 2020, 46: 1353-1362. PMID: 33259628, PMCID: PMC7707067, DOI: 10.1093/schbul/sbaa086.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAdverse Childhood ExperiencesAgedFamilyFemaleGenetic Predisposition to DiseaseHealth SurveysHumansLife Change EventsLongitudinal StudiesMaleMarijuana UseMiddle AgedMultifactorial InheritanceNetherlandsPsychotic DisordersSchizophreniaSocioeconomic FactorsUrban PopulationYoung AdultConceptsPolygenic risk scoresSchizophrenia polygenic risk scoresMental healthFamily historyNetherlands Mental Health SurveyPopulation-based studyPolygenic riskChildhood traumaMental Health SurveyMental health changesEnvironmental risk factorsGeneral mental healthPopulation mental healthGeneral population sampleSomatic painRisk factorsHealth SurveyRisk scorePRS-SZBipolar disorderEpidemiological settingsMental disordersHealth changesAttributable variationPainReduced regulatory T cells with increased proinflammatory response in patients with schizophrenia
Sahbaz C, Zibandey N, Kurtulmus A, Duran Y, Gokalp M, Kırpınar I, Sahin F, Guloksuz S, Akkoc T. Reduced regulatory T cells with increased proinflammatory response in patients with schizophrenia. Psychopharmacology 2020, 237: 1861-1871. PMID: 32221694, DOI: 10.1007/s00213-020-05504-0.Peer-Reviewed Original ResearchConceptsPeripheral blood mononuclear cellsRegulatory T cellsHealthy controlsT cellsIL-17AIL-6Smoking status-matched healthy controlsCulture supernatant levelsT cell percentageTh1/Th2Levels of Foxp3Blood mononuclear cellsBody mass indexImmune imbalanceTreg percentageMass indexProinflammatory cytokinesMethodsForty patientsMononuclear cellsPlasma levelsProinflammatory responseSupernatant levelsCell percentageResultsIn comparisonArray kitThe jumping to conclusions reasoning bias as a cognitive factor contributing to psychosis progression and persistence: findings from NEMESIS-2
Rauschenberg C, Reininghaus U, Have M, de Graaf R, van Dorsselaer S, Simons C, Gunther N, Henquet C, Pries L, Guloksuz S, Bak M, van Os J. The jumping to conclusions reasoning bias as a cognitive factor contributing to psychosis progression and persistence: findings from NEMESIS-2. Psychological Medicine 2020, 51: 1696-1703. PMID: 32174291, PMCID: PMC8327623, DOI: 10.1017/s0033291720000446.Peer-Reviewed Original Research
2019
Replicated evidence that endophenotypic expression of schizophrenia polygenic risk is greater in healthy siblings of patients compared to controls, suggesting gene–environment interaction. The EUGEI study
van Os J, Pries L, Delespaul P, Kenis G, Luykx J, Lin B, Richards A, Akdede B, Binbay T, Altınyazar V, Yalınçetin B, Gümüş-Akay G, Cihan B, Soygür H, Ulaş H, Cankurtaran E, Kaymak S, Mihaljevic M, Petrovic S, Mirjanic T, Bernardo M, Cabrera B, Bobes J, Saiz P, García-Portilla M, Sanjuan J, Aguilar E, Santos J, Jiménez-López E, Arrojo M, Carracedo A, López G, González-Peñas J, Parellada M, Maric N, Atbaşoğlu C, Ucok A, Alptekin K, Saka M, Arango C, O'Donovan M, Rutten B, Guloksuz S. Replicated evidence that endophenotypic expression of schizophrenia polygenic risk is greater in healthy siblings of patients compared to controls, suggesting gene–environment interaction. The EUGEI study. Psychological Medicine 2019, 50: 1884-1897. PMID: 31414981, DOI: 10.1017/s003329171900196x.Peer-Reviewed Original ResearchConceptsPsychotic disordersPolygenic riskSchizophrenia polygenic riskGene-environment interactionsGenetic riskRelatives of patientsFirst-degree relativesPsychosis phenotypeAverage genetic riskIntermediate phenotypesHealthy siblingsCognitive intermediate phenotypesControl groupAnalysis of associationAverage riskPatientsOrganization framework and preliminary findings from the Athens First‐Episode Psychosis Research Study
Xenaki L, Kollias C, Stefanatou P, Ralli I, Soldatos R, Dimitrakopoulos S, Hatzimanolis A, Triantafyllou T, Kosteletos I, Vlachos I, Selakovic M, Foteli S, Mantonakis L, Ermiliou V, Voulgaraki M, Psarra E, Gülöksüz S, van Os J, Stefanis N. Organization framework and preliminary findings from the Athens First‐Episode Psychosis Research Study. Early Intervention In Psychiatry 2019, 14: 343-355. PMID: 31402581, DOI: 10.1111/eip.12865.Peer-Reviewed Original ResearchConceptsRisk factorsMild functional improvementLongitudinal cohort studySymptom severity criteriaPoor cognitive performanceOutcome of psychosisPreliminary findingsPatients 16Cohort studyAntipsychotic treatmentClinical pictureFEP patientsClinical managementFunctional improvementFamily historyEmergency unitBaseline presentationSeverity criteriaPsychiatric hospitalPsychotic disordersClinical InterviewDrug usePotential associationGene-environment interaction studiesBiochemical parametersToward incorporating genetic risk scores into symptom networks of psychosis
Isvoranu A, Guloksuz S, Epskamp S, van Os J, Borsboom D, Investigators. Toward incorporating genetic risk scores into symptom networks of psychosis. Psychological Medicine 2019, 50: 636-643. PMID: 30867074, PMCID: PMC7093319, DOI: 10.1017/s003329171900045x.Peer-Reviewed Original ResearchEffects of Curcumin on Cognitive Functioning and Inflammatory State in Schizophrenia: A Double-Blind, Placebo-Controlled Pilot Trial.
Kucukgoncu S, Guloksuz S, Tek C. Effects of Curcumin on Cognitive Functioning and Inflammatory State in Schizophrenia: A Double-Blind, Placebo-Controlled Pilot Trial. Journal Of Clinical Psychopharmacology 2019, 39: 182-184. PMID: 30747752, DOI: 10.1097/jcp.0000000000001012.Peer-Reviewed Original ResearchEvidence for an association of serum melatonin concentrations with recognition and circadian preferences in patients with schizophrenia
Sahbaz C, Özer O, Kurtulmus A, Kırpınar I, Sahin F, Guloksuz S. Evidence for an association of serum melatonin concentrations with recognition and circadian preferences in patients with schizophrenia. Metabolic Brain Disease 2019, 34: 865-874. PMID: 30758707, DOI: 10.1007/s11011-019-00395-3.Peer-Reviewed Original ResearchConceptsBody mass indexSerum melatonin concentrationsPittsburgh Sleep Quality IndexHealthy controlsMelatonin concentrationsCognitive impairmentMorningness-Eveningness QuestionnaireHigher body mass indexLower MEQ scoresSleep Quality IndexNegative Syndrome ScaleEnzyme-linked immunosorbentCircadian preferenceMelatonin groupMass indexMelatonergic pathwaysHC groupPatientsNeurodevelopmental originSyndrome ScaleMelatonin levelsPatient samplesSchizophreniaMelatoninMEQ scoresPsychometric liability to psychosis and childhood adversities are associated with shorter telomere length: A study on schizophrenia patients, unaffected siblings, and non-clinical controls
Çevik B, Mançe-Çalışır Ö, Atbaşoğlu E, Saka M, Alptekin K, Üçok A, Sırmatel B, Gülöksüz S, Tükün A, van Os J, Gümüş-Akay G. Psychometric liability to psychosis and childhood adversities are associated with shorter telomere length: A study on schizophrenia patients, unaffected siblings, and non-clinical controls. Journal Of Psychiatric Research 2019, 111: 169-185. PMID: 30776705, DOI: 10.1016/j.jpsychires.2019.01.022.Peer-Reviewed Original ResearchConceptsShorter telomere lengthLonger telomere lengthChildhood adversityTelomere lengthUnaffected siblingsSCZ patientsChronic medical disordersCourse of schizophreniaSimilar telomere lengthPsychotic-like symptomsHypothesis patientsClinical presentationNon-clinical controlsMedical disordersGeneral populationFunctioning scoresPatientsSchizophrenia patientsSocio-demographic featuresGlobal assessmentEarly onsetSchizophreniaLife expectancyAges 0Potential role
2018
Reasoning bias, working memory performance and a transdiagnostic phenotype of affective disturbances and psychotic experiences in the general population
Reininghaus U, Rauschenberg C, Have M, de Graaf R, van Dorsselaer S, Simons CJP, Gunther N, Pries LK, Guloksuz S, Radhakrishnan R, Bak M, van Os J. Reasoning bias, working memory performance and a transdiagnostic phenotype of affective disturbances and psychotic experiences in the general population. Psychological Medicine 2018, 49: 1799-1809. PMID: 30160228, DOI: 10.1017/s0033291718002209.Peer-Reviewed Original ResearchConceptsComposite International Diagnostic InterviewAffective disturbancesPsychotic experiencesNetherlands Mental Health SurveySecond Netherlands Mental Health SurveyTransdiagnostic phenotypeJTC biasMental Health SurveyDose-response relationshipGeneral population sampleHealth SurveyGeneral populationIncidence studyHelp-seeking behaviorDiagnostic InterviewTime pointsMemory performanceConclusions reasoning biasPopulation sampleRecent findingsPhenotypeDigit span taskIndividualsFindingsPsychosisEvaluation of the Association between Lithium Treatment and GSK3β Polymorphism in Bipolar Disorder Patients.
Altınbaş K, Yeşilbaş D, İnce B, Cansız A, Sılan F, Özdemir Ö, Gülöksüz S. Evaluation of the Association between Lithium Treatment and GSK3β Polymorphism in Bipolar Disorder Patients. Turkish Journal Of Psychiatry 2018, 29: 73-78. PMID: 30215834, DOI: 10.5080/u20582.Peer-Reviewed Original ResearchConceptsMean ageLithium treatmentTreatment responseGSK-3βBipolar disorder type IBipolar disorder patientsLack of evidenceClinical predictorsHospital recordsTreatment adherenceTreatment optionsDisease onsetFirst episodeReal-time PCRIndividualized treatmentPharmacogenomic findingsBlood samplesDisorder patientsSide effectsAG genotypeClinical practiceScale scoreBipolar disorderPatientsSample cohort
2017
Evidence that polygenic risk for psychotic disorder is expressed in the domain of neurodevelopment, emotion regulation and attribution of salience
van Os J, van der Steen Y, Islam M, Gülöksüz S, Rutten B, Simons C. Evidence that polygenic risk for psychotic disorder is expressed in the domain of neurodevelopment, emotion regulation and attribution of salience. Psychological Medicine 2017, 47: 2421-2437. PMID: 28436345, DOI: 10.1017/s0033291717000915.Peer-Reviewed Original ResearchConceptsPolygenic risk scoresHealthy comparison subjectsPsychotic disordersAttribution of salienceAffective episodesComparison subjectsIntelligence quotientTotal scorePolygenic riskFirst-degree relativesElevated genetic riskLower intelligence quotientManic episodesHealthy relativesRisk scoreNeurodevelopmental alterationsDepression subscaleLifetime ratesSimilar associationPsychosis riskFloor effectsGenetic riskPositive subscalePsychosis phenotypeDisorders
2015
Temperament characteristics in patients with panic disorder and their first-degree relatives
Altınbaş G, Altınbaş K, Gülöksüz S, Gülöksüz S, Aydemir Ö, Özgen G. Temperament characteristics in patients with panic disorder and their first-degree relatives. Comprehensive Psychiatry 2015, 60: 73-77. PMID: 25967357, DOI: 10.1016/j.comppsych.2015.03.008.Peer-Reviewed Original ResearchConceptsFirst-degree relativesHealthy controlsPanic disorderIrritable temperament scoresPanic Agoraphobia ScaleAnxious temperament scoresTemperament characteristicsTrait Anxiety InventoryClinical characteristicsPatient groupClinical conditionsSan Diego AutoquestionnairePatientsTemperament scoresTrait markerAgoraphobia ScaleAnxiety disordersProspective designDisordersStudy sampleHeritable anxiety disordersAnxiety InventoryTemperament EvaluationEducation levelIntermediate phenotypesThe impact of electroconvulsive therapy on the tryptophan–kynurenine metabolic pathway
Guloksuz S, Arts B, Walter S, Drukker M, Rodriguez L, Myint A, Schwarz M, Ponds R, van Os J, Kenis G, Rutten B. The impact of electroconvulsive therapy on the tryptophan–kynurenine metabolic pathway. Brain Behavior And Immunity 2015, 48: 48-52. PMID: 25765557, DOI: 10.1016/j.bbi.2015.02.029.Peer-Reviewed Original ResearchConceptsTrp-Kyn pathwayHamilton Depression Rating Scale-17 itemsElectroconvulsive therapyBeck Depression InventoryMechanism of actionKynurenic acidTrp-KynKyn/Trp ratioKYNA/KYN ratioTryptophan-kynurenine metabolic pathwayLast ECT sessionBilateral electroconvulsive therapyKyn/TrpTreatment of depressionMultilevel linear regression analysesKYN metabolitesECT sessionsAntidepressant effectsECT responseBipolar depressionECT treatmentTrp ratioNeuroprotective propertiesKynurenine pathwayNeurotoxic processes
2014
Electrocardiography changes in bipolar patients during long-term lithium monotherapy
Altinbas K, Guloksuz S, Caglar I, Caglar F, Kurt E, Oral E. Electrocardiography changes in bipolar patients during long-term lithium monotherapy. General Hospital Psychiatry 2014, 36: 694-697. PMID: 25091141, DOI: 10.1016/j.genhosppsych.2014.07.001.Peer-Reviewed Original ResearchConceptsTherapeutic serum levelsHealthy controlsSerum levelsLithium monotherapyLithium levelsEuthymic BD type I patientsBipolar disorderLong-term lithium useBD type I patientsCardiovascular side effectsChronic lithium treatmentSerum lithium levelsVentricular electrical instabilityType I patientsQT dispersion ratioUse of lithiumElectrocardiography changesI patientsBD patientsTherapeutic rangeLithium treatmentQRS intervalQT dispersionLithium useElectrocardiogram parameters