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Brietzke E, Rosa AR, Pedrini M, Noto MN, Kapczinski F, Scott J. Challenges and developments in research of the early stages of bipolar disorder. ACTA ACUST UNITED AC 2016; 38:329-337. [PMID: 27533022 PMCID: PMC7111347 DOI: 10.1590/1516-4446-2016-1975] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 05/09/2016] [Indexed: 01/02/2023]
Abstract
Recently, attention in the field of bipolar disorder (BD) has focused on prevention, including early detection and intervention, as these strategies have the potential to delay, lessen the severity, or even prevent full-blown episodes of BD. Although knowledge of the neurobiology of BD has advanced substantially in the last two decades, most research was conducted with chronic patients. The objective of this paper is to comprehensively review the literature regarding the early stages of BD, to explore recent discoveries on the neurobiology of these stages, and to discuss implications for research and clinical care. The following databases were searched: PubMed, PsycINFO, Cochrane Library, and SciELO. Articles published in English from inception to December 2015 were retrieved. Several research approaches were used, including examination of offspring studies, retrospective studies, prospective studies of clinical high-risk populations, and exploration of the progression after the first manic episode. Investigations with neuroimaging, cognition assessments, and biomarkers provide promising (although not definitive) evidence of alterations in the neural substrate during the at-risk stage. Research on BD should be expanded to encompass at-risk states and aligned with recent methodological progress in neuroscience.
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Affiliation(s)
- Elisa Brietzke
- Grupo de Pesquisa em Neurociência Comportamental e Molecular do Transtorno Bipolar, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil.,Laboratório Interdisciplinar de Neurociências Clínicas (LINC), UNIFESP, São Paulo, SP, Brazil.,Programa de Intervenção em Estados Mentais de Risco (PRISMA), Departamento de Psiquiatria, UNIFESP, São Paulo, SP, Brazil
| | - Adriane R Rosa
- Laboratório de Psiquiatria Molecular, Instituto Nacional de Ciência e Tecnologia - Medicina Translacional (INCT-TM), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Medicina, Departamento de Psiquiatria, UFRGS, Porto Alegre, RS, Brazil.,Departamento de Farmacologia, UFRGS, Porto Alegre, RS, Brazil
| | - Mariana Pedrini
- Grupo de Pesquisa em Neurociência Comportamental e Molecular do Transtorno Bipolar, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil.,Laboratório Interdisciplinar de Neurociências Clínicas (LINC), UNIFESP, São Paulo, SP, Brazil.,Programa de Intervenção em Estados Mentais de Risco (PRISMA), Departamento de Psiquiatria, UNIFESP, São Paulo, SP, Brazil
| | - Mariane N Noto
- Grupo de Pesquisa em Neurociência Comportamental e Molecular do Transtorno Bipolar, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil.,Laboratório Interdisciplinar de Neurociências Clínicas (LINC), UNIFESP, São Paulo, SP, Brazil.,Programa de Intervenção em Estados Mentais de Risco (PRISMA), Departamento de Psiquiatria, UNIFESP, São Paulo, SP, Brazil
| | - Flavio Kapczinski
- Laboratório de Psiquiatria Molecular, Instituto Nacional de Ciência e Tecnologia - Medicina Translacional (INCT-TM), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Medicina, Departamento de Psiquiatria, UFRGS, Porto Alegre, RS, Brazil
| | - Jan Scott
- Academic Psychiatry, Institute of Neuroscience, Newcastle University, UK.,Centre for Affective Disorders, Institute of Psychiatry, King's College London, London, UK
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Versace A, Acuff H, Bertocci MA, Bebko G, Almeida JRC, Perlman SB, Leemans A, Schirda C, Aslam H, Dwojak A, Bonar L, Travis M, Gill MK, Demeter C, Diwadkar VA, Sunshine JL, Holland SK, Kowatch RA, Birmaher B, Axelson D, Horwitz SM, Frazier TW, Arnold LE, Fristad MA, Youngstrom EA, Findling RL, Phillips ML. White matter structure in youth with behavioral and emotional dysregulation disorders: a probabilistic tractographic study. JAMA Psychiatry 2015; 72:367-76. [PMID: 25715064 PMCID: PMC4415624 DOI: 10.1001/jamapsychiatry.2014.2170] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
IMPORTANCE Psychiatric disorders in youth characterized by behavioral and emotional dysregulation are often comorbid and difficult to distinguish. An alternative approach to conceptualizing these disorders is to move toward a diagnostic system based on underlying pathophysiologic processes that may cut across conventionally defined diagnoses. Neuroimaging techniques have potentials for the identification of these processes. OBJECTIVE To determine whether diffusion imaging, a neuroimaging technique examining white matter (WM) structure, can identify neural correlates of emotional dysregulation in a sample of youth with different psychiatric disorders characterized by behavioral and emotional dysregulation. DESIGN, SETTING, AND PARTICIPANTS Using global probabilistic tractography, we examined relationships between WM structure in key tracts in emotional regulation circuitry (ie, cingulum, uncinate fasciculus, and forceps minor) and (1) broader diagnostic categories of behavioral and emotional dysregulation disorders (DDs) and (2) symptom dimensions cutting across conventional diagnoses in 120 youth with behavioral and/or emotional DDs, a referred sample of the Longitudinal Assessment of Manic Symptoms (LAM) study. Thirty age- and sex-matched typically developing youth (control participants) were included. Multivariate multiple regression models were used. The study was conducted from July 1, 2010, to February 28, 2014. MAIN OUTCOMES AND MEASURES Fractional anisotropy as well as axial and radial diffusivity were estimated and imported into a well-established statistical package. We hypothesized that (1) youth with emotional DDs and those with both behavioral and emotional DDs would show significantly lower fractional anisotropy compared with youth with behavioral DDs in these WM tracts and (2) that there would be significant inverse relationships between dimensional measures of affective symptom severity and fractional anisotropy in these tracts across all participants. RESULTS Multivariate multiple regression analyses revealed decreased fractional anisotropy and decreased axial diffusivity within the uncinate fasciculus in youth with emotional DDs vs those with behavioral DDs, those with both DDs, and the controls (F6,160 = 2.4; P = .032; all pairwise comparisons, P < .002). In the same model, greater severity of manic symptoms was positively associated with higher fractional anisotropy across all affected youth (F3,85 = 2.8; P = .044). CONCLUSIONS AND RELEVANCE These findings suggest that abnormal uncinate fasciculus and cingulum WM structure may underlie emotional, but not behavioral, dysregulation in pediatric psychiatric disorders and that a different neural mechanism may exist for comorbid emotional and behavioral DDs.
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Affiliation(s)
- Amelia Versace
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh
| | - Heather Acuff
- Medical Science Training Program, University of Pittsburgh School of Medicine
| | - Michele A. Bertocci
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh
| | - Genna Bebko
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh
| | - Jorge R. C. Almeida
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh
| | - Susan B. Perlman
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh
| | - Alexander Leemans
- Image Sciences Institute, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Claudiu Schirda
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh
| | - Haris Aslam
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh
| | - Amanda Dwojak
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh
| | - Lisa Bonar
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh
| | - Michael Travis
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh
| | - Mary Kay Gill
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh
| | - Christine Demeter
- University Hospitals Case Medical Center/Case Western Reserve University
| | - Vaibhav A. Diwadkar
- Department of Psychiatry and Behavioral Neuroscience, Wayne State University
| | | | - Scott K Holland
- Cincinnati Children's Hospital Medical Center, University of Cincinnati
| | | | - Boris Birmaher
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh
| | | | - Sarah M. Horwitz
- Department of Child and Adolescent Psychiatry, New York University School of Medicine
| | | | | | | | | | - Robert L. Findling
- University Hospitals Case Medical Center/Case Western Reserve University.,Department of Psychiatry, Johns Hopkins University
| | - Mary L. Phillips
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh
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