Temperament traits mediate the relationship between CACNA1C polymorphisms and bipolar disorder in cisgender women.

The influence of temperament traits on bipolar disorder (BD) has been investigated. Both temperament traits and BD are partially genetically determined and seem to be influenced by variations in the CACNA1C gene. These variations presented a significant interactive effect with biological sex, although studies that evaluate this relationship are scarce. Here, we assessed the mediation effect of temperament traits on the relationship between two polymorphisms in the CACNA1C gene (rs1006737 and rs4765913) and BD according to sex. This is a cross-sectional study consisting of 878 Caucasian individuals (508 women and 370 men), aged 18-35, enrolled in a population-based study in the city of Pelotas, Southern Brazil. BD diagnosis was evaluated using the clinical interview MINI 5.0, and temperament traits were assessed via the application of the Affective and Emotional Composite Temperament Scale (AFECTS). Mediation models were tested using the modeling tool PROCESS (version 3.3) for SPSS. Bootstrapping-enhanced mediation analyses in women indicated that traits anger (39%) and caution (27%) mediated the association between the rs4765913 SNP and BD, while traits volition (29%), anger (35%), and caution (29%) mediated the association between the AA haplotype (rs1006737-rs4765913) and the BD. No effect was encountered for cisgender men. Our model revealed that paths from CACNA1C SNPs to BD are mediated by specific temperament traits in women, reinforcing the definition of temperament traits as endophenotypes.

BDNF Levels According to Variations in the CACNA1C Gene: Sex-Based Disparity.

The CACNA1C gene encodes the pore-forming alpha-1c subunit of L-type voltage-gated calcium channels. The calcium influx through these channels regulates the transcription of the brain-derived neurotrophic factor (BDNF). Polymorphisms in this gene have been consistently associated with psychiatric disorders, and alterations in BDNF levels are a possible biological mechanism to explain such associations. Here, we sought to investigate the effect of the CACNA1C rs1006737 and rs4765913 polymorphisms and their haplotypes on serum BDNF concentration. We further aim to investigate the regulatory function of these SNPs and the ones linked to them. The study enrolled 641 young adults (362 women and 279 men) in a cross-sectional population-based survey. Linear regression was used to test the effects of polymorphisms and haplotypes on BDNF levels adjusted for potential confounders. Moreover, regulatory putative functional roles were assessed using in silico approach. BDNF levels were not associated with CACNA1C polymorphisms/haplotype in the total sample. When the sample was stratified by sex, checking the effect of polymorphisms on men and women separately, the A-allele of rs4765913 was associated with lower BDNF levels in women compared with the TT genotype (p = 0.010). The AA (rs1006737-rs4765913) haplotype was associated with BDNF levels in opposite directions regarding sex, with lower levels of BDNF in women (p = 0.040) compared to those without this haplotype, while with higher levels in men (p = 0.027). These findings were supported by the presence of regulatory marks only on the male fetal brain. Our results suggest that the BDNF levels regulation may be a potential mechanism underpinning the association between CACNA1C and psychiatric disorders, with a differential role in women and men.

An exploratory study of resting-state functional connectivity of amygdala subregions in posttraumatic stress disorder following trauma in adulthood.

We carried out an exploratory study aimed at identifying differences in resting-state functional connectivity for the amygdala and its subregions, right and left basolateral, centromedial and superficial nuclei, in patients with Posttraumatic Stress Disorder (PTSD), relative to controls. The study included 10 participants with PTSD following trauma in adulthood (9 females), and 10 controls (9 females). The results suggest PTSD was associated with a decreased (negative) functional connectivity between the superficial amygdala and posterior brain regions relative to controls. The differences were observed between right superficial amygdala and right fusiform gyrus, and between left superficial amygdala and left lingual and left middle occipital gyri. The results suggest that among PTSD patients, the worse the PTSD symptoms, the lower the connectivity. The results corroborate the fMRI literature that shows PTSD is associated with weaker amygdala functional connectivity with areas of the brain involved in sensory and perceptual processes. The results also suggest that though the patients traumatic experience occured in adulthood, the presence of early traumatic experiences were associated with negative connectivity between the centromedial amygdala and sensory and perceptual regions. We argue that the understanding of the mechanisms of PTSD symptoms, its behaviors and the effects on quality of life of patients may benefit from the investigation of brain function that underpins sensory and perceptual symptoms associated with the disorder.

Interaction between COMT Val158 Met polymorphism and childhood trauma predicts risk for depression in men.

Depression is a disabling illness with complex etiology. While the catechol-O-methyltransferase (COMT) gene, in particular the functional Val158 Met polymorphism, has been related to depression, the mechanisms underlying this gene-disease association are not completely understood. Therefore, we explore the association of COMT Val158 Met polymorphism with depression as well as its interaction with childhood trauma in 1136 young adults from a population-based study carried out in the city of Pelotas, Brazil. The diagnosis was performed through the Mini International Neuropsychiatric Interview 5.0 (MINI 5.0), and trauma was assessed with the Childhood Trauma Questionnaire (CTQ). Total DNA was extracted and genotyped by real-time PCR, and the QTLbase dataset was queried to perform large-scale quantitative trait locus (QTL) analysis. Our research showed no direct association between the Val158 Met polymorphism and the diagnosis of depression (women: χ2  = 0.10, d = 1, p = 0.751; men: χ2  = 0.003, df = 1, p = 0.956). However, the Met-allele of the Val158 Met polymorphism modified the effect of childhood trauma in men (OR = 2.58 [95% CI: 1.05-6.29]; p = 0.038) conferring risk for depression only on those who suffer from trauma. The conditional effect from moderation analysis showed that trauma impacts the risk of depression only in men carrying the Met-allele (effect: 0.9490, standard error [SE]: 0.2570; p = 0.0002). QTLbase and dataset for Val158 Met polymorphism were consistent for markers that influence chromatin accessibility transcription capacity including histone methylation and acetylation. The changes caused in gene regulation by childhood trauma exposure and polymorphism may serve as evidence of the mechanism whereby the interaction increases susceptibility to this disorder in men.

Leptin polymorphism rs3828942: risk for anxiety disorders?

Leptin is an anorexigenic hormone well recognized by its role in mediating energy homeostasis. Recently, leptin has been associated with psychiatric disorders and interestingly, leptin treatment has shown antidepressant and anxiolytic effects. We examined the association of leptin levels and leptin (LEP) gene rs3828942 polymorphism with anxiety disorders considering sex differences. A cross-sectional population-based study, including 1067 young adults, of whom 291 presented anxiety disorders diagnosed by the Mini International Neuropsychiatric Interview (MINI 5.0). The rs3828942 polymorphism was genotyped by real-time PCR and ELISA measured leptin levels. Leptin levels were not associated with anxiety disorders after adjusting for sex and body mass index (BMI) [ß = - 0.009 (- 0.090-0.072); p = 0.832]. The distribution of rs3828942 genotypes was not associated with anxiety disorders. However, in a sex-stratified sample, the A-allele of rs3828942 polymorphism was associated with risk for GAD in women even when adjusting for confounding variables [OR = 1.87 (1.17-2.98); p = 0.008]. In a subsample of 202 individuals with GAD and control matched by sex and BMI, results suggest an interaction between genotypes and GAD diagnosis based on leptin levels only in the male group [F (1, 54) = 6.464; p = 0.0139]. Leptin is suggested to be related with the neurobiology of anxiety disorders in a sex-dependent manner since women carrying the A-allele of LEP rs3828942 present a higher risk for GAD, while leptin levels seem to be lower in men with GAD carrying A-allele. Studies on the relationship between leptin polymorphisms and levels are scarce and, therefore, further research is necessary.

Temperament traits moderate the relationship between Childhood Trauma and Interleukin 1ß profile in young adults.

Early life stressors, such as childhood trauma, have been associated to alterations in immune response that can last until adulthood. In this context, interleukin 1ß (IL-1ß) emerges as a pro-inflammatory cytokine with a pivotal role. Also, considering the temperament differences in stress susceptibility, and even immune dysfunction, studies investigating the complex interaction between these factors are scarce. Thus, the aim of the present study was to evaluate the moderating role of temperament traits in the relationship between childhood trauma and serum IL-1ß levels. This cross-sectional study consisted of 325 individuals, men and women, aged 18-35, enrolled from a population-based study in the city of Pelotas, Southern Brazil. Our main results indicate that higher serum levels of IL-1ß were associated with trauma severity (p < 0.01), and the variance of anger could explain 29% of IL-1ß increase in individuals who suffered severe trauma (p < 0.05). The effect of anger was considerably stronger in men than in women (46% and 25%, respectively). Moreover, the variance of sensitivity also explained 15% of IL-1ß increase (p < 0.05) as well as the variance of volition explained 11% of IL-1ß decrease (p < 0.05) in individuals who suffered severe trauma in the general population. Our results indicate that emotional individual differences can moderate the impact of childhood trauma on low-grade inflammation in young adults.

The role of CACNA1C gene and childhood trauma interaction on bipolar disorder.

Studies on gene x environment interaction (GxE) have provided vital information for uncovering the origins of complex diseases. When considering the etiology of bipolar disorder (BD), the role of such interactions is unknown. Here, we tested whether trauma during childhood could modify the effect of two polymorphisms in the CACNA1C gene (rs1006737 and rs4765913) in terms of susceptibility to BD. The study enrolled 878 Caucasian young adults in a cross-sectional population-based survey. BD diagnosis was performed using a clinical interview MINI 5.0, and trauma was assessed with the childhood trauma questionnaire (CTQ). Binary logistic regression models were employed to test the main effects of polymorphisms, haplotypes, and GxE interactions using sex as a confounder. We did not observe an association between the polymorphisms and diagnosis of BD. However, we noted that childhood trauma modified the effect of the rs4765913 polymorphism (p = .018) and the AA haplotype (rs1006737 - rs4765913) (p = .018) on BD susceptibility. A allele carriers of the rs4765913 polymorphism or the AA haplotype exposed to childhood trauma are more likely to develop BD compared to the individuals without a genetic risk. Thus, this study showed that the risk of developing BD in individuals exposed to childhood trauma was influenced by the individual's genetic background, varying according to the CACNA1C genotypes.

Analysis of association between temperament and psychological symptoms using the Affective and Emotional Composite Temperament (AFECT) model: An internet-based survey.

BACKGROUND: Temperamental characteristics have been suggested as potential vulnerability markers or could help differential diagnosis among psychiatric disorders. The current study aimed to explore whether there are specific temperament profiles related to different psychological symptoms, according to the Affective and Emotional Composite Temperament (AFECT) model. METHODS: We used a cross-sectional web-based survey collected from the Brazilian Internet Study on Temperament and Psychopathology (BRAINSTEP). The sample consisted of 16,495 self-selected volunteers assessed with the Affective and Emotional Composite Temperament Scale (AFECTS), Adult Self-Report Inventory (ASRI), and Adult Self-Report Scale (ASRS). RESULTS: All unstable affective temperaments (cyclothymic, dysphoric, and volatile) correlated, in different intensities, with all psychiatric symptoms assessed. Cyclothymic temperament was mainly related to borderline personality symptoms. Dysphoric and volatile temperament showed an association with attention deficit hyperactivity symptoms. Melancholic temperament was associated with major depressive symptoms, and euphoric temperament showed a positive correlation with maniac symptoms. Euthymic and hyperthymic temperaments were negatively correlated with all psychiatric symptoms. In addition, the assessment of the emotional traits of temperament showed that high volition, low anger, low sensitivity, and high control are characteristics that are not related to psychopathology. LIMITATIONS: This study had a cross-sectional design, which does not allow an exact inference of cause and consequence. CONCLUSIONS: Our results suggest that temperament assessment using AFECT model may be relevant to assess the risk of developing psychological symptoms over the time. These results strengthen the theoretical framework that psychiatric disorders may be manifestations of the extremes of affective temperaments.

Impact of genetic variations in ADORA2A gene on depression and symptoms: a cross-sectional population-based study.

Genetic variants involved in adenosine metabolism and its receptors were associated with increased risk for psychiatric disorders, including anxiety, depression, and schizophrenia. Here, we examined an association between a single nucleotide polymorphism in A2A receptor gene (ADORA2A, rs2298383 SNP) with current depressive episode and symptom profile. A total of 1253 individuals from a cross-sectional population-based study were analyzed by the Mini International Neuropsychiatric Interview 5.0. Our data showed that the TT genotype of ADORA2A rs2298383 SNP was associated with reduced risk for depression when compared to the CC/CT genotypes (p = 0.020). This association remained significant after adjusting for confounding variables such as smoking, gender, socioeconomic class, and ethnicity (OR = 0.631 (95% CI 0.425-0.937); p = 0.022). Regarding the symptoms associated with depression, we evaluated the impact of the ADORA2A SNP in the occurrence of sad/discouraged mood, anhedonia, appetite changes, sleep disturbances, motion changes, energy loss, feelings of worthless or guilty, difficulty in concentrating, and presence of bad thoughts. Notably, the TT genotype was independently associated with reduced sleep disturbances (OR = 0.438 (95% CI 0.258-0.743); p = 0.002) and less difficulty in concentrating (OR = 0.534 (95% CI 0.316-0.901; p = 0.019). The cross-sectional design cannot evaluate the cause-effect relationship and did not evaluate the functional consequences of this polymorphism. Our data support an important role for ADORA2A rs2298383 SNP in clinical heterogeneity associated with depression. The presence of the TT genotype was associated with decrease risk for current depression and disturbances in sleep and attention, two of the most common symptoms associated with this disorder.

Trends in sexual orientation in Brazil / Tendências da orientação sexual no Brasil / Tendencias de orientación sexual en Brasil

The current study aimed to evaluate the prevalence of sexual identities in Brazil across age and sex based on five categories (heterosexuals, mostly heterosexuals, bisexual, mostly homosexuals, and homosexuals) and to assess homoerotic ideation and behavior in heterosexuals. The data were collected using self-report questionnaires in a research website. Data from 41,873 participants were collected and analyzed. From total sample, 78.2% of males and 89.8% of females self-declared to be heterosexuals. The most prevalent minorities were homosexuals (4.6%) and mostly heterosexuals (4.1%). Same-sex ideation and behavior among heterosexuals was frequent and gender differences were robust. Orientation identities other than substantial heterosexuals seem to be more prevalent in the younger generations.

Avaliou-se a prevalência de identidades sexuais em homens e mulheres de diferentes gerações com base em cinco categorias (heterossexuais, predominantemente heterossexuais, bissexuais, predominantemente homossexuais e homossexuais) e aferiu-se a ideação e comportamentos homoeróticos em heterossexuais. A coletada de dados foi realizada por meio de questionários de autorrelato disponibilizados em um sitio de pesquisa na Internet. Dados de 41.873 Brasileiros foram colhidos e analisados. Do total, 78.2% dos homens e 89.8% das mulheres se declaram heterossexuais, a minoria sexual mais prevalente foi a de homossexuais (4.6%) e de predominantemente heterossexuais (4.1%). Ideação e comportamentos homoeróticos em heterossexuais foram frequentes e diferenças entre homens e mulheres foram robustas. Não heterossexualidades foram mais prevalentes em gerações mais jovens.

Se evaluó la prevalencia de las identidades sexuales en hombres y mujeres de diferentes generaciones sobre la base de las cinco categorías (heterosexuales, predominantemente heterosexuales, bisexuales, predominantemente homosexuales y homosexuales) y la ideación y conductas homoeróticas fueran evaluadas en heterosexuales. Los datos fueron recolectados a través de cuestionarios de autorrelato en un sitio de pesquisa en la Internet. Se recogieron y analizaron datos de 41.873 brasileños. Del total, el 78,2% de hombres y 89,8% de las mujeres dicen que son heterosexuales, la minoría sexual más prevalente era homosexual (4,6%) y predominantemente heterosexual (4,1%). Ideación y conductas homoeróticas en heterosexuales fueran comunes y las diferencias entre hombres y mujeres fueran robustas. Identidades non heterosexuales fueron más prevalentes en las generaciones más jóvenes.

[Leisure-time physical activity and licit substance use in a population sample of young adults]. / Atividade física de lazer e uso de substâncias lícitas em uma amostra populacional de adultos jovens.

The scope of this study was to assess the prevalence and factors associated with leisure-time physical activity, as well as to verify its association with licit substance use in a population sample of young adults. It is a cross-sectional population-based study with young adults aged between 18 and 35 years old, living in the urban area of the city of Pelotas in the Brazilian State of Rio Grande do Sul. Sample selection was performed by clusters, being composed of 1953 individuals, among the 82 selected census tracts. The practice of physical activity was evaluated using the International Physical Activity Questionnaire (IPAQ). The chi-square and Poisson regression tests were used for statistical analysis. The prevalence of young adults active in leisure-time physical activity was 25.3%; most were single males between 18 and 23 years, belonging to the people in the highest economic bracket and not smoking on a daily basis. Specific strategies should be developed to promote an active and healthy lifestyle, focusing on incentives for older, lower income class women who smoke.

Atividade física de lazer e uso de substâncias lícitas em uma amostra populacional de adultos jovens / Leisure-time physical activity and licit substance use in a population sample of young adults

Resumo O objetivo do estudo foi mensurar a prevalência e os fatores associados à prática de atividade física de lazer, bem como verificar a associação desta com o uso de substâncias lícitas em uma amostra populacional de adultos jovens. Estudo transversal de base populacional com adultos jovens de 18 a 35 anos de idade, residentes da zona urbana da cidade de Pelotas-RS (Brasil). A seleção amostral foi realizada por conglomerados, sendo constituída por 1953 indivíduos, dentre 82 setores censitários sorteados. A prática de atividade física foi avaliada por meio do Questionário Internacional de Atividade Física (IPAQ). Para a análise estatística utilizou-se a regressão de Poisson. A prevalência de jovens ativos em atividade física de lazer foi de 25,3% e esteve associada a ser do sexo masculino, ter entre 18 e 23 anos de idade, pertencer ao maior tercil do indicador econômico nacional e não fazer uso diário de tabaco. Sabendo-se da importância da atividade física de lazer para a saúde, os incentivos para esta prática devem ser focados nos grupos de mulheres, de maior idade, de estratos econômicos inferiores e que fazem uso de tabaco.

Abstract The scope of this study was to assess the prevalence and factors associated with leisure-time physical activity, as well as to verify its association with licit substance use in a population sample of young adults. It is a cross-sectional population-based study with young adults aged between 18 and 35 years old, living in the urban area of the city of Pelotas in the Brazilian State of Rio Grande do Sul. Sample selection was performed by clusters, being composed of 1953 individuals, among the 82 selected census tracts. The practice of physical activity was evaluated using the International Physical Activity Questionnaire (IPAQ). The chi-square and Poisson regression tests were used for statistical analysis. The prevalence of young adults active in leisure-time physical activity was 25.3%; most were single males between 18 and 23 years, belonging to the people in the highest economic bracket and not smoking on a daily basis. Specific strategies should be developed to promote an active and healthy lifestyle, focusing on incentives for older, lower income class women who smoke.

Fatherhood in adolescence: prevalence and associated factors in a community sample of youngsters.

This article aims to assess the prevalence of fatherhood in adolescence (FA) and associated factors in a community sample of 14 to 35 year-old men. Cross-sectional population-based study realized in the urban area of the city of Pelotas-RS, Brazil. The sample was selected by clusters, according to the city census. This sub-study only comprised sexually active men. Data were collected using a self-administered questionnaire in the participants' homes. The sample was composed for 934 men. The prevalence of fatherhood in adolescence was 8% (n = 75). We verified higher prevalence of FA among those that reported paternal absence (p < 0.001), those that had lived with stepfather (p = 0.044), and among those that had sexual debut before the age of 14 (p = 0.011). Paternal absence, have lived with a stepfather, and early sexual experience are associated factors to fatherhood in adolescence.

Fatherhood in adolescence: prevalence and associated factors in a community sample of youngsters / Paternidade na adolescência: prevalência e fatores associados em uma amostra comunitária de jovens

This article aims to assess the prevalence of fatherhood in adolescence (FA) and associated factors in a community sample of 14 to 35 year-old men. Cross-sectional population-based study realized in the urban area of the city of Pelotas-RS, Brazil. The sample was selected by clusters, according to the city census. This sub-study only comprised sexually active men. Data were collected using a self-administered questionnaire in the participants’ homes. The sample was composed for 934 men. The prevalence of fatherhood in adolescence was 8% (n = 75). We verified higher prevalence of FA among those that reported paternal absence (p < 0.001), those that had lived with stepfather (p = 0.044), and among those that had sexual debut before the age of 14 (p = 0.011). Paternal absence, have lived with a stepfather, and early sexual experience are associated factors to fatherhood in adolescence.

O artigo tem por objetivo avaliar a prevalência de paternidade na adolescência (PA) e fatores associados em uma amostra comunitária de homens de 14 a 35 anos. Estudo transversal de base populacional realizado na zona urbana de Pelotas/RS, Brasil. A seleção amostral foi realizada por múltiplos estágios, considerando a divisão censitária do município. Neste estudo foram incluídos indivíduos do sexo masculino e sexualmente ativos. Os dados foram coletados através de questionário autoaplicável nos domicílios dos participantes. A amostra do estudo foi composta por 934 homens. A prevalência de paternidade na adolescência foi de 8% (n = 75). Verificou-se maior prevalência de PA entre aqueles que relataram ausência paterna na infância (p < 0,001), aqueles que viveram com padrasto (p = 0,044) e entre aqueles que tiverem o início da vida sexual antes dos 14 anos. Conclusões: A ausência paterna e o convívio com padrasto na infância, bem como a iniciação sexual precoce são fatores associados à paternidade na adolescência.

Antidepressant Effects of Ketamine Are Not Related to ¹8F-FDG Metabolism or Tyrosine Hydroxylase Immunoreactivity in the Ventral Tegmental Area of Wistar Rats.

Major depressive disorder (MDD) is an important health problem that is often associated to stress. One of the main brain regions related to MDD is the ventral tegmental area (VTA), a dopaminergic center, part of the reward and motivation circuitry. Recent studies show that changes to VTA dopaminergic neurons are associated with depression and treatment. Ketamine has recently shown a fast, potent antidepressant effect in acute, sub-anesthetic doses. Thus, our aims were to elucidate if ketamine would be able to revert depression-like behaviors induced by a chronic unpredictable stress (CUS) protocol and if it could cause alterations to metabolism and tyrosine hydroxylase (TH)-immunoreactivity in VTA. For this, 48 Wistar rats were divided into four groups: control + saline (CTRL + SAL), control + ketamine (CTRL + KET), CUS + saline (CUS + SAL), CUS + ketamine (CUS + KET). The CUS groups underwent 28 days of CUS protocol. Saline or ketamine (10 mg/kg) was administered intraperitonially once on day 28. The behavior was assessed by the sucrose preference test, the open field test, and the forced swim test. Glucose brain metabolism was assessed and quantified with microPET. TH-immunoreactivity was assessed by estimating neuronal density and regional and cellular optical densities. A decrease in sucrose intake in the CUS groups and an increase in immobility was rapidly reverted by ketamine (p < 0.05). No difference was observed in the open field test. There was no alteration to VTA metabolism and TH-immunoreaction. These results suggest that the depressive-like behavior induced by CUS and the antidepressant effects of ketamine are unrelated to changes in neuronal metabolism or dopamine production in VTA.

Modelo estrutural de internalização e externalização: emergência, validade e utilidade clínica / Internalizing and externalizing structural model: emergency, validity and clinical utility / El modelo estructural de internalización y externalización: emergencia, validez y utilidad clínica

Os sistemas oficiais de classificação e diagnóstico em psicopatologia apresentam limitações relacionadas à extensa heterogeneidade clínica e ao significado dos padrões de comorbidade diagnóstica. A fim de superá-las, pesquisadores têm defendido uma estrutura dimensional para as psicopatologias mais prevalentes baseada em dois fatores latentes de internalização e externalização. O presente artigo visa avaliar a validade do Modelo Estrutural de Internalização e Externalização, tendo como norte a superação das referidas limitações e sua utilidade clínica. Revisão não sistemática da literatura nas bases Scielo e PubMed. Foram selecionados artigos empíricos e teóricos que avaliavam a pertinência do modelo. Foram excluídos estudos de replicação ou que avaliam o modelo em amostras infantis. A busca de literatura resultou em um total de 536 artigos, dos quais foram mantidos 44. Esse conteúdo foi organizado em três linhas de pesquisa: estudos epidemiológicos-estruturais, psicobiológicos e psicométricos. O Modelo Estrutural de Internalização e Externalização apresenta indicadores que dão sustentabilidade aos seus pressupostos teóricos. O modelo é capaz explicar a comorbidade diagnóstica e, parcialmente, heterogeneidade clínica. Entretanto, não apresenta instrumental clínico normatizado para a operacionalização dos construtos e não há estudos com amostras clínicas graves.(AU).

The official systems of classification and diagnosis of psychopathology have limitations related to the extensive clinical heterogeneity and the meaning of patterns of diagnostic comorbidity. To overcome them, researchers have argued for a dimensional structure to the most prevalent psychopathology based on two latent factors of internalizing and externalizing vulnerability. The current study aimed to evaluate the validity of the Internalizing/Externalizing Structural Model, having as a standard its ability to overcome the aforementioned limitations and its clinical utility. A non-systematic review was performed in PubMed and SciELO databases. Theoretical and empirical articles were retrieved based and evaluated on basis of its relevance to the model. Replications and studies based on samples of children were excluded. Bibliographic search yielded a total of 536 articles, of which 44 were retrieved. The content of the articles were organized into three lines of research: structural-epidemiological, psychobiological, and psychometric. The Internalizing/Externalizing Structural Model presents indicators that support its theoretical assumptions. The model is able to explain the diagnostic comorbidity and, partially, clinical heterogeneity. However, there is no standardized clinical instrument for the operationalization of internalizing/externalizing constructs and no validation studies with inpatient samples.(AU).

Los sistemas oficiales de clasificación y diagnóstico de la psicopatología tienen limitaciones relacionadas con la amplia heterogeneidad clínica y el significado de los patrones de comorbilidad diagnóstica. Para superarlas, los investigadores han argumentado a favor de una estructura tridimensional de la psicopatología más frecuente en base a dos factores latentes de internalización y externalización vulnerabilidad. El presente estudio tuvo como objetivo evaluar la validez del modelo estructural internalización/externalización tener patrones de utilidad, la heterogeneidad y la comorbilidad clínicas como parámetros. Una revisión no sistemática fue realizada en bases de datos PubMed y SciELO. Artículos teóricos y empíricos se recuperaron basa y evaluado en función de su relevancia para el modelo. Se excluyeron réplicas y estudios basados en muestras de niños. Búsqueda bibliográfica arrojó un total de 536 artículos, de los cuales 44 fueron recuperados. El contenido de los artículos que se han organizado en tres líneas de investigación: estructural-epidemiológicos, psicobiológicos y psicométricos. El modelo estructural de internalización/externalización presenta indicadores que apoyan sus hipótesis teóricas. El modelo es capaz de explicar la comorbilidad de diagnóstico y, en parte, la heterogeneidad clínica. Sin embargo, no existe un instrumento clínico estandarizado para avaluación de internalización e externalización, ni estudios de validación con muestras de pacientes hospitalizados.(AU).

Modelo estrutural de internalização e externalização: emergência, validade e utilidade clínica / Internalizing and externalizing structural model: emergency, validity and clinical utility / El modelo estructural de internalización y externalización: emergencia, validez y utilidad clínica

Os sistemas oficiais de classificação e diagnóstico em psicopatologia apresentam limitações relacionadas à extensa heterogeneidade clínica e ao significado dos padrões de comorbidade diagnóstica. A fim de superá-las, pesquisadores têm defendido uma estrutura dimensional para as psicopatologias mais prevalentes baseada em dois fatores latentes de internalização e externalização. O presente artigo visa avaliar a validade do Modelo Estrutural de Internalização e Externalização, tendo como norte a superação das referidas limitações e sua utilidade clínica. Revisão não sistemática da literatura nas bases Scielo e PubMed. Foram selecionados artigos empíricos e teóricos que avaliavam a pertinência do modelo. Foram excluídos estudos de replicação ou que avaliam o modelo em amostras infantis. A busca de literatura resultou em um total de 536 artigos, dos quais foram mantidos 44. Esse conteúdo foi organizado em três linhas de pesquisa: estudos epidemiológicos-estruturais, psicobiológicos e psicométricos. O Modelo Estrutural de Internalização e Externalização apresenta indicadores que dão sustentabilidade aos seus pressupostos teóricos. O modelo é capaz explicar a comorbidade diagnóstica e, parcialmente, heterogeneidade clínica. Entretanto, não apresenta instrumental clínico normatizado para a operacionalização dos construtos e não há estudos com amostras clínicas graves.

The official systems of classification and diagnosis of psychopathology have limitations related to the extensive clinical heterogeneity and the meaning of patterns of diagnostic comorbidity. To overcome them, researchers have argued for a dimensional structure to the most prevalent psychopathology based on two latent factors of internalizing and externalizing vulnerability. The current study aimed to evaluate the validity of the Internalizing/Externalizing Structural Model, having as a standard its ability to overcome the aforementioned limitations and its clinical utility. A non-systematic review was performed in PubMed and SciELO databases. Theoretical and empirical articles were retrieved based and evaluated on basis of its relevance to the model. Replications and studies based on samples of children were excluded. Bibliographic search yielded a total of 536 articles, of which 44 were retrieved. The content of the articles were organized into three lines of research: structural-epidemiological, psychobiological, and psychometric. The Internalizing/Externalizing Structural Model presents indicators that support its theoretical assumptions. The model is able to explain the diagnostic comorbidity and, partially, clinical heterogeneity. However, there is no standardized clinical instrument for the operationalization of internalizing/externalizing constructs and no validation studies with inpatient samples.

Los sistemas oficiales de clasificación y diagnóstico de la psicopatología tienen limitaciones relacionadas con la amplia heterogeneidad clínica y el significado de los patrones de comorbilidad diagnóstica. Para superarlas, los investigadores han argumentado a favor de una estructura tridimensional de la psicopatología más frecuente en base a dos factores latentes de internalización y externalización vulnerabilidad. El presente estudio tuvo como objetivo evaluar la validez del modelo estructural internalización/externalización tener patrones de utilidad, la heterogeneidad y la comorbilidad clínicas como parámetros. Una revisión no sistemática fue realizada en bases de datos PubMed y SciELO. Artículos teóricos y empíricos se recuperaron basa y evaluado en función de su relevancia para el modelo. Se excluyeron réplicas y estudios basados en muestras de niños. Búsqueda bibliográfica arrojó un total de 536 artículos, de los cuales 44 fueron recuperados. El contenido de los artículos que se han organizado en tres líneas de investigación: estructural-epidemiológicos, psicobiológicos y psicométricos. El modelo estructural de internalización/externalización presenta indicadores que apoyan sus hipótesis teóricas. El modelo es capaz de explicar la comorbilidad de diagnóstico y, en parte, la heterogeneidad clínica. Sin embargo, no existe un instrumento clínico estandarizado para avaluación de internalización e externalización, ni estudios de validación con muestras de pacientes hospitalizados.

Practice of leisure-time physical activities and episodes of mood alteration amongst men and women.

OBJECTIVE: To evaluate the prevalence of leisure-time physical activity and episodes of mood alteration in a population-based sample of adults, and its relation with gender. METHOD: This is a cross-sectional population-based study with young adults aged between 18 and 35 years old. Sample selection was performed by clusters. The practice of physical activity was evaluated through the International Physical Activity Questionnaire (IPAQ), whereas mood disorders were evaluated using a short structured diagnostic interview-the Mini International Neuropsychiatric Interview (MINI) for DSM-IV and ICD-10 psychiatric disorders. LIMITATION: Causal inferences are limited due the study׳s design. RESULTS: Sample consisted of 1953 young adults. The prevalence of leisure-time physical activity and of depressive episodes in the total sample was 25.3% and 17.2%, respectively. The prevalence of activity amongst men was 1.18 (CI 95% 1.18-1.32) times higher than in the women׳s group, whereas depression was 1.87 (CI 95% 1.41-2.47) times more prevalent amongst women than men. The prevalence of physical activity was not different between women (p=0.287), nor between men (p=0.895) regarding the presence of mania/hypomania episode. CONCLUSION: The prevalence of physical activity and depression was different concerning gender. The prevalence of physical activity is lower amongst women, whereas the prevalence of depression is higher amongst women when compared to men.

Reduced serum levels of neuron specific enolase (NSE) in drug-naïve subjects with major depression and bipolar disorder.

Several biological factors have been recently related with major depression and bipolar disorder. The aim of our paper was to investigate the peripheral levels of the protein neuronal specific enolase (NSE), a putative marker of neuronal damage, comparing patients with major depressive disorder and bipolar disorder to control subjects. This is a case-control study nested in a cross-sectional population-based survey. Psychopathology screen was performed using the Mini-International Neuropsychiatric Interview 5.0 and blood samples were collected from 108 young adults. Three groups were selected, 36 healthy controls, 36 subjects with major depression disorder and 36 subjects with bipolar disorder. Serum levels of NSE significantly decreased (p = 0.002) in major depression disorder (2.19 ± 1.78 ng/mL) and bipolar disorder subjects (2.53 ± 2.61 ng/mL) compared to the control group (3.55 ± 2.19 ng/mL). In conclusion, peripheral neuronal specific enolase may be a useful marker drug-naïve major depression disorder and bipolar disorder, but its pathophysiological significance and response to treatment should be further investigated.