2013
Gene variants associated with antisocial behaviour: a latent variable approach
Bentley MJ, Lin H, Fernandez TV, Lee M, Yrigollen CM, Pakstis AJ, Katsovich L, Olds DL, Grigorenko EL, Leckman JF. Gene variants associated with antisocial behaviour: a latent variable approach. Journal Of Child Psychology And Psychiatry 2013, 54: 1074-1085. PMID: 23822756, PMCID: PMC3766409, DOI: 10.1111/jcpp.12109.Peer-Reviewed Original ResearchConceptsRisk allelesGenetic risk allelesSingle nucleotide polymorphismsGene variantsNurse home visitation programAge 15 yearsStress response pathwaysCholinergic signalingDrug useCommon genetic variantsPutative risk allelesAntisocial behaviorVariable scoresResponse pathwaysGenetic polymorphismsVisitation programMolecular networksPathway analysisStress responseGenesGenetic variablesMolecular levelGenetic variants
2012
Tourette syndrome in youth with and without obsessive compulsive disorder and attention deficit hyperactivity disorder
Lebowitz ER, Motlagh MG, Katsovich L, King RA, Lombroso PJ, Grantz H, Lin H, Bentley MJ, Gilbert DL, Singer HS, Coffey BJ, the Tourette Syndrome Study Group, Kurlan RM, Leckman JF. Tourette syndrome in youth with and without obsessive compulsive disorder and attention deficit hyperactivity disorder. European Child & Adolescent Psychiatry 2012, 21: 451-457. PMID: 22543961, PMCID: PMC3722559, DOI: 10.1007/s00787-012-0278-5.Peer-Reviewed Original ResearchConceptsAttention deficit hyperactivity disorderComorbid tic disordersObsessive-compulsive disorderSeverity of ticsChronic tic disorderTic disordersPsychosocial stressDeficit hyperactivity disorderGlobal functioningComorbid diagnosesHyperactivity disorderMore severe ticsComorbid attention deficit hyperactivity disorderDiagnosis of OCDComorbid obsessive-compulsive disorderAdditional comorbid diagnosesSymptoms of anxietyHigh psychosocial stressMore internalizing disordersGreater psychosocial stressSevere ticsOppositional defiant disorderSevere subtypeTic severityTourette syndrome
2011
Risperidone-Related Improvement of Irritability in Children with Autism Is not Associated with Changes in Serum of Epidermal Growth Factor and Interleukin-13
Tobiasova Z, van der Lingen KH, Scahill L, Leckman JF, Zhang Y, Chae W, McCracken JT, McDougle CJ, Vitiello B, Tierney E, Aman MG, Arnold LE, Katsovich L, Hoekstra PJ, Volkmar F, Bothwell AL, Kawikova I. Risperidone-Related Improvement of Irritability in Children with Autism Is not Associated with Changes in Serum of Epidermal Growth Factor and Interleukin-13. Journal Of Child And Adolescent Psychopharmacology 2011, 21: 555-564. PMID: 22070180, PMCID: PMC3279715, DOI: 10.1089/cap.2010.0134.Peer-Reviewed Original ResearchConceptsMedication-free subjectsEpidermal growth factorHealthy controlsInflammatory markersIL-13IL-1 receptor antagonistGrowth factorSerum inflammatory markersChemoattractant protein-1Placebo groupClinical improvementBaseline visitIL-17Serum levelsCytokine concentrationsInflammatory moleculesSerum concentrationsClinical trialsHealthy subjectsIL-1Interleukin-13RisperidoneAltered levelsProtein 1Diagnosis of autism
2010
Streptococcal Upper Respiratory Tract Infections and Exacerbations of Tic and Obsessive-Compulsive Symptoms: A Prospective Longitudinal Study
Leckman JF, King RA, Gilbert DL, Coffey BJ, Singer HS, Dure LS, Grantz H, Katsovich L, Lin H, Lombroso PJ, Kawikova I, Johnson DR, Kurlan RM, Kaplan EL. Streptococcal Upper Respiratory Tract Infections and Exacerbations of Tic and Obsessive-Compulsive Symptoms: A Prospective Longitudinal Study. Journal Of The American Academy Of Child & Adolescent Psychiatry 2010, 50: 108-118.e3. PMID: 21241948, PMCID: PMC3024577, DOI: 10.1016/j.jaac.2010.10.011.Peer-Reviewed Original ResearchConceptsExacerbation of ticsGABHS infectionStreptococcal infectionSymptom exacerbationStreptococcal upper respiratory tract infectionPediatric autoimmune neuropsychiatric disordersUpper respiratory tract infectionObsessive-compulsive symptomsAutoimmune neuropsychiatric disordersHemolytic streptococcal infectionRespiratory tract infectionsThroat swab cultureLongitudinal studyProspective longitudinal studyPANDAS subjectsClinical exacerbationStreptococcal antibodiesTract infectionsClinical symptomsGABHS infectionsGroup of childrenLaboratory valuesSwab culturesClinical conditionsClinical evaluatorsAdverse Effects of Heavy Prenatal Maternal Smoking on Attentional Control in Children With ADHD
Motlagh MG, Sukhodolsky DG, Landeros-Weisenberger A, Katsovich L, Thompson N, Scahill L, King RA, Peterson BS, Schultz RT, Leckman JF. Adverse Effects of Heavy Prenatal Maternal Smoking on Attentional Control in Children With ADHD. Journal Of Attention Disorders 2010, 15: 593-603. PMID: 20616372, PMCID: PMC3974616, DOI: 10.1177/1087054710374576.Peer-Reviewed Original ResearchConceptsConnors' Continuous Performance TestContinuous Performance TestAttentional controlPrenatal maternal smokingStroop Color-Word Interference TestColor-Word Interference TestMaternal smokingVisual-Motor Integration TestRisk factorsBeery Visual-Motor Integration TestReaction time variabilityVisual-motor integrationSlower reaction timesDevelopment of ADHDFine motor coordinationNeuropsychological batteryPurdue Pegboard TestHeavy maternal smokingMaternal cigarette smokingPerinatal risk factorsMaternal psychosocial stressMotor inhibitionNeurobiological basisNeuropsychological deficitsADHDSevere psychosocial stress and heavy cigarette smoking during pregnancy: an examination of the pre- and perinatal risk factors associated with ADHD and Tourette syndrome
Motlagh MG, Katsovich L, Thompson N, Lin H, Kim YS, Scahill L, Lombroso PJ, King RA, Peterson BS, Leckman JF. Severe psychosocial stress and heavy cigarette smoking during pregnancy: an examination of the pre- and perinatal risk factors associated with ADHD and Tourette syndrome. European Child & Adolescent Psychiatry 2010, 19: 755-764. PMID: 20532931, PMCID: PMC3932440, DOI: 10.1007/s00787-010-0115-7.Peer-Reviewed Original ResearchConceptsHeavy maternal smokingPerinatal risk factorsAttention-deficit/hyperactivity disorderSevere psychosocial stressRisk factorsMaternal smokingTourette syndromePsychosocial stressUnaffected control childrenControl childrenHeavy cigarette smokingHigh-risk populationStatistical significanceDiagnosis of ADHDComorbid Tourette's syndromeHigh rateMothers of childrenMaternal report dataHeavy smokingPerinatal historyCigarette smokingOdds ratioPsychiatric assessmentSmokingStandardized questionnaire
2009
Streptococcal Upper Respiratory Tract Infections and Psychosocial Stress Predict Future Tic and Obsessive-Compulsive Symptom Severity in Children and Adolescents with Tourette Syndrome and Obsessive-Compulsive Disorder
Lin H, Williams KA, Katsovich L, Findley DB, Grantz H, Lombroso PJ, King RA, Bessen DE, Johnson D, Kaplan EL, Landeros-Weisenberger A, Zhang H, Leckman JF. Streptococcal Upper Respiratory Tract Infections and Psychosocial Stress Predict Future Tic and Obsessive-Compulsive Symptom Severity in Children and Adolescents with Tourette Syndrome and Obsessive-Compulsive Disorder. Biological Psychiatry 2009, 67: 684-691. PMID: 19833320, PMCID: PMC2843763, DOI: 10.1016/j.biopsych.2009.08.020.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAnti-Bacterial AgentsAttention Deficit Disorder with HyperactivityChildDepressive DisorderFemaleForecastingHumansLife Change EventsMaleObsessive-Compulsive DisorderPredictive Value of TestsProspective StudiesPsychologyRespiratory Tract InfectionsSeverity of Illness IndexStreptococcal InfectionsTicsTourette SyndromeConceptsDepressive symptom severityObsessive-compulsive disorderGABHS infectionPsychosocial stressTourette syndromeSymptom severityControl subjectsStreptococcal upper respiratory tract infectionUpper respiratory tract infectionBeta-hemolytic streptococcal infectionCurrent psychosocial stressRespiratory tract infectionsHealthy control subjectsProspective longitudinal studyEarly-onset obsessive-compulsive disorderMinority of childrenOC symptom severityTract infectionsStreptococcal infectionGABHS infectionsObsessive-compulsive symptom severityClinical ratingsNew infectionsClinical ratersControl status
2008
Neuropsychiatric Disorders Associated With Streptococcal Infection: A Case-Control Study Among Privately Insured Children
Leslie DL, Kozma L, Martin A, Landeros A, Katsovich L, King RA, Leckman JF. Neuropsychiatric Disorders Associated With Streptococcal Infection: A Case-Control Study Among Privately Insured Children. Journal Of The American Academy Of Child & Adolescent Psychiatry 2008, 47: 1166-1172. PMID: 18724258, PMCID: PMC2783578, DOI: 10.1097/chi.0b013e3181825a3d.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAttention Deficit Disorder with HyperactivityCase-Control StudiesChildChild, PreschoolCross-Sectional StudiesDepressive Disorder, MajorFemaleHealth SurveysHumansIncidenceInsurance, HealthMaleMigraine DisordersNeurocognitive DisordersObsessive-Compulsive DisorderOdds RatioOtitis MediaRiskSinusitisStreptococcal InfectionsTic DisordersTourette SyndromeUnited StatesConceptsMajor depressive disorderAttention-deficit/hyperactivity disorderPrior streptococcal infectionStreptococcal infectionObsessive-compulsive disorderTic disordersTourette syndromeNeuropsychiatric disordersConditional logistic regression modelsStreptococcal sore throatDiagnosis of OCDCase-control studyLogistic regression modelsSore throatIncident diagnosisEpidemiologic evidenceDepressive disorderSubsequent diagnosisNoninfectious conditionsScarlet feverChildren ages 4Immune systemInfectious diseasesInfectionDiagnosis
2006
Psychosocial stress predicts future symptom severities in children and adolescents with Tourette syndrome and/or obsessive‐compulsive disorder
Lin H, Katsovich L, Ghebremichael M, Findley DB, Grantz H, Lombroso PJ, King RA, Zhang H, Leckman JF. Psychosocial stress predicts future symptom severities in children and adolescents with Tourette syndrome and/or obsessive‐compulsive disorder. Journal Of Child Psychology And Psychiatry 2006, 48: 157-166. PMID: 17300554, PMCID: PMC3073143, DOI: 10.1111/j.1469-7610.2006.01687.x.Peer-Reviewed Original ResearchConceptsDepressive symptom severityFuture depressive symptomsHealthy control subjectsObsessive-compulsive disorderDepressive symptomsPsychosocial stressTourette syndromeSymptom severityControl subjectsLong-term contextual threatSeverity of ticsProspective longitudinal studyChronological ageIndependent predictorsOC symptomsTic severityOC symptom severityPsychosocial adversitySymptomsFuture symptom severityClinician ratingsSeverityParental reportsSignificant predictorsLongitudinal studyIdentification of pyruvate kinase as an antigen associated with Tourette syndrome
Kansy JW, Katsovich L, McIver KS, Pick J, Zabriskie JB, Lombroso PJ, Leckman JF, Bibb JA. Identification of pyruvate kinase as an antigen associated with Tourette syndrome. Journal Of Neuroimmunology 2006, 181: 165-176. PMID: 17011640, PMCID: PMC1853370, DOI: 10.1016/j.jneuroim.2006.08.007.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAmino Acid SequenceAnimalsAntibodies, BacterialAntigensAutoantibodiesBrainChildCross ReactionsHumansImmunohistochemistryLongitudinal StudiesMaleMiceMice, Inbred C57BLMolecular Sequence DataProspective StudiesPyruvate KinaseRatsSeroepidemiologic StudiesStreptococcal InfectionsTicsTourette SyndromeConceptsStreptococcal infectionObsessive-compulsive disorderTourette syndromeAutoimmune targetExacerbated symptomsBeta-hemolytic streptococcal infectionEarly-onset obsessive-compulsive disorderStreptococcal M proteinPediatric populationTic disordersImmune responseSurface antigenInfectious strainsSyndromeInfectionDisordersPyruvate kinaseM proteinPatientsImmunoreactivitySymptomsAntigenAntibodiesGlycolytic enzymesM1 isoformEffects of Short- and Long-Term Risperidone Treatment on Prolactin Levels in Children with Autism
Anderson GM, Scahill L, McCracken JT, McDougle CJ, Aman MG, Tierney E, Arnold LE, Martin A, Katsovich L, Posey DJ, Shah B, Vitiello B. Effects of Short- and Long-Term Risperidone Treatment on Prolactin Levels in Children with Autism. Biological Psychiatry 2006, 61: 545-550. PMID: 16730335, DOI: 10.1016/j.biopsych.2006.02.032.Peer-Reviewed Original ResearchConceptsRisperidone-induced increasesLong-term risperidone treatmentProlactin levelsRisperidone treatmentSerum prolactinOpen-label followWeeks of risperidoneBaseline prolactin levelsEffects of ShortPlacebo groupProlactin elevationReceptor polymorphismsWeek 8Baseline levelsMean increaseProlactinRisperidoneSerum samplesAdverse effectsPlaceboChildrenTreatmentMonthsDRD2 allelesAdolescents
2005
Increased serum levels of interleukin-12 and tumor necrosis factor-alpha in Tourette’s syndrome
Leckman JF, Katsovich L, Kawikova I, Lin H, Zhang H, Krönig H, Morshed S, Parveen S, Grantz H, Lombroso PJ, King RA. Increased serum levels of interleukin-12 and tumor necrosis factor-alpha in Tourette’s syndrome. Biological Psychiatry 2005, 57: 667-673. PMID: 15780855, DOI: 10.1016/j.biopsych.2004.12.004.Peer-Reviewed Original ResearchConceptsEarly-onset obsessive-compulsive disorderObsessive-compulsive disorderSymptom exacerbationInterleukin-12Control subjectsImmune responseTourette syndromeTumor necrosis factor-alpha concentrationsNecrosis factor-alpha concentrationsAge-matched control subjectsInvolvement of innateLocal cytokine synthesisT cell immunityHumoral immune responseCentral nervous systemInnate immune responseLongitudinal studyProspective longitudinal studyT cell activationCell immunitySerum levelsPediatric populationCommon infectionsSerum concentrationsInflammatory process
2004
Prospective Longitudinal Study of Children With Tic Disorders and/or Obsessive-Compulsive Disorder: Relationship of Symptom Exacerbations to Newly Acquired Streptococcal Infections
Luo F, Leckman JF, Katsovich L, Findley D, Grantz H, Tucker DM, Lombroso PJ, King RA, Bessen DE. Prospective Longitudinal Study of Children With Tic Disorders and/or Obsessive-Compulsive Disorder: Relationship of Symptom Exacerbations to Newly Acquired Streptococcal Infections. Pediatrics 2004, 113: e578-e585. PMID: 15173540, DOI: 10.1542/peds.113.6.e578.Peer-Reviewed Original ResearchConceptsGABHS infectionSymptom exacerbationObsessive-compulsive disorderControl subjectsTourette syndromeAcute exacerbationTime pointsHealthy control subjectsBeta-hemolytic streptococciAcute inflammatory responseAcute symptom exacerbationsProspective longitudinal studyAutoimmune mechanismsPediatric patientsStreptococcal infectionNeuropsychiatric symptomsGABHS infectionsNonspecific markerInflammatory responseTic disordersUnselected groupObsessive-compulsive symptom severityExacerbationPatientsObsessive-compulsive symptoms
2003
Development of the Yale Children’s Global Stress Index (YCGSI) and Its Application in Children and Adolescents With Tourette’s Syndrome and Obsessive-Compulsive Disorder
FINDLEY DB, LECKMAN JF, KATSOVICH L, LIN H, ZHANG H, GRANTZ H, OTKA J, LOMBROSO PJ, KING RA. Development of the Yale Children’s Global Stress Index (YCGSI) and Its Application in Children and Adolescents With Tourette’s Syndrome and Obsessive-Compulsive Disorder. Journal Of The American Academy Of Child & Adolescent Psychiatry 2003, 42: 450-457. PMID: 12649632, DOI: 10.1097/01.chi.0000046816.95464.ef.Peer-Reviewed Original ResearchConceptsObsessive-compulsive disorderTourette syndromeDaily Life Stressors ScalePsychosocial stressAge-matched control subjectsClinician ratingsClinical rating instrumentGlobal clinician ratingsTime pointsGlobal Stress IndexCross-sectional ratingsEarly-onset obsessive-compulsive disorderPsychometric propertiesControl subjectsClinical severityObsessive-compulsive symptom severityStudy of childrenAcceptable psychometric propertiesStress indexSymptom severitySyndromePossible differential contributionInterrater reliabilityStressor ScaleDisorders
2002
Obsessive‐compulsive symptom dimensions in affected sibling pairs diagnosed with Gilles de la Tourette syndrome
Leckman JF, Pauls DL, Zhang H, Rosario‐Campos M, Katsovich L, Kidd KK, Pakstis AJ, Alsobrook JP, Robertson MM, McMahon WM, Walkup JT, van de Wetering BJ, King RA, Cohen DJ. Obsessive‐compulsive symptom dimensions in affected sibling pairs diagnosed with Gilles de la Tourette syndrome. American Journal Of Medical Genetics Part B Neuropsychiatric Genetics 2002, 116B: 60-68. PMID: 12497616, DOI: 10.1002/ajmg.b.10001.Peer-Reviewed Original ResearchAssessment of Symptom Exacerbations in a Longitudinal Study of Children With Tourette's Syndrome or Obsessive-Compulsive Disorder
LIN H, YEH CB, PETERSON BS, SCAHILL L, GRANTZ H, FINDLEY DB, KATSOVICH L, OTKA J, LOMBROSO PJ, KING RA, LECKMAN JF. Assessment of Symptom Exacerbations in a Longitudinal Study of Children With Tourette's Syndrome or Obsessive-Compulsive Disorder. Journal Of The American Academy Of Child & Adolescent Psychiatry 2002, 41: 1070-1077. PMID: 12218428, DOI: 10.1097/00004583-200209000-00007.Peer-Reviewed Original Research