Depression, stress and anxiety in medical students: a cross-sectional comparison between students from different semesters

Objective: To compare the prevalence of anxiety, depression, and stress in medical students from all semesters of a Brazilian medical school and assess their respective associated factors. Method: A cross-sectional study of students from the twelve semesters of a Brazilian medical school was carried out. Students filled out a questionnaire including sociodemographics, religiosity (DUREL – Duke Religion Index), and mental health (DASS-21 – Depression, Anxiety, and Stress Scale). The students were compared for mental health variables (Chi-squared/ANOVA). Linear regression models were employed to assess factors associated with DASS-21 scores. Results: 761 (75.4%) students answered the questionnaire; 34.6% reported depressive symptomatology, 37.2% showed anxiety symptoms, and 47.1% stress symptoms. Significant differences were found for: anxiety – ANOVA: [F = 2.536, p=0.004] between first and tenth (p=0.048) and first and eleventh (p=0.025) semesters; depression – ANOVA: [F = 2.410, p=0.006] between first and second semesters (p=0.045); and stress – ANOVA: [F = 2.968, p=0.001] between seventh and twelfth (p=0.044), tenth and twelfth (p=0.011), and eleventh and twelfth (p=0.001) semesters. The following factors were associated with (a) stress: female gender, anxiety, and depression; (b) depression: female gender, intrinsic religiosity, anxiety, and stress; and (c) anxiety: course semester, depression, and stress. Conclusion: Our findings revealed high levels of depression, anxiety, and stress symptoms in medical students, with marked differences among course semesters. Gender and religiosity appeared to influence the mental health of the medical students.Objetivo: Comparar a prevalência de ansiedade, depressão e estresse em estudantes de todos os períodos de graduação de medicina e avaliar os fatores associados. Método: Estudo transversal e comparativo, realizado com alunos dos seis anos (doze semestres) de um curso de medicina brasileiro. Os alunos preencheram um questionário com dados sociodemográficos e relacionados à religiosidade (Duke Religion Index) e à saúde mental (DASS-21 - Depression, Anxiety and Stress Scale). Os estudantes dos 12 períodos do curso foram comparados quanto às variáveis demográficas, socioeconômicas e saúde mental por meio dos testes de Qui-quadrado ou ANOVA. Para avaliar os fatores associados a cada variável dependente (estresse, depressão e ansiedade), foram utilizados modelos de regressão linear. Resultados: Responderam ao questionário 743 (73,63%) dos 1.009 estudantes matriculados no curso de medicina, com 34,6% apresentando sintomatologia depressiva; 37,2%, sintomas de ansiedade; e 47,1%, estresse. Houve diferenças significantes entre os períodos em relação à ansiedade - ANOVA: (F = 2,536; p=0,004), sendo as diferenças entre o primeiro e o décimo período (p=0,048) e entre o primeiro e o décimo primeiro período (p=0,025); à depressão - ANOVA: (F = 2,410; p=0,006), sendo as diferenças entre o primeiro e o segundo período (p=0,045); e ao estresse - ANOVA: (F = 2,968; p=0,001), sendo as diferenças entre o sétimo e o décimo segundo período (p=0,044), entre o décimo e o décimo segundo (p=0,011) e entre o décimo primeiro e o décimo segundo (p=0,001). Estiveram associados (a) ao estresse: gênero feminino, ansiedade e depressão; (b) à depressão: gênero feminino, religiosidade intrínseca, ansiedade e estresse; (c) à ansiedade: semestre do curso, depressão e estresse. Conclusão: Os achados do presente estudo mostram altos níveis de sintomas de depressão, ansiedade e estresse em estudantes de medicina, com diferenças marcantes nos diferentes semestres do curso. Fatores como gênero e religiosidade parecem influenciar a saúde mental dos estudantes de medicina

Pesquisa malacológica de Biomphalaria em municípios da Estrada Real, situados no sudeste do Estado de Minas Gerais

INTRODUCTION: The increasing practice of ecotourism and rural tourism in the State of Minas Gerais, Brazil, highlights the importance of studies concerning the occurrence of potential intermediate hosts of Schistosoma mansoni. This study aimed to identify species of Biomphalaria snails in municipalities along the Estrada Real, an important Brazilian tourism project. METHODS: The specimens were collected in different water collections of 36 municipalities along the Estrada Real in the southeast of the State of Minas Gerais. Biomphalaria species were characterized using both morphological and molecular approaches. The research was conducted between August 2005 and September 2009 and all the sites visited were georeferenced using GPS. RESULTS: Six Biomphalaria species were found in 30 of the 36 municipalities studied: glabrata, tenagophila, straminea, peregrina, occidentalis and schrammi. The first three species of Biomphalaria, recognized as intermediate hosts of S. mansoni, were present in 33.3%, 47.2% and 8.3% of the municipalities studied, respectively. The mollusks were found in different types of water collections and no infection by S. mansoni was detected. The highest occurrence of Biomphalaria concentration was verified in the area covered by the Caminho Novo route (Diamantina/MG to Rio de Janeiro/RJ). CONCLUSIONS: Considering the occurrence of schistosomiasis in the State of Minas Gerais and the socioeconomic repercussions involved in the Estrada Real Project, this work focuses on the vulnerability of water collections due to the presence of Biomphalaria mollusks and emphasizes the need for epidemiological surveillance and sanitary and educational measures integrated with the local community and tourism sectors.INTRODUÇÃO: O aumento das práticas de ecoturismo e turismo rural, em Minas Gerais, Brasil, evidencia a importância de se realizarem estudos sobre a ocorrência de hospedeiros intermediários do Schistosoma mansoni, no estado. O presente trabalho objetivou a busca e identificação das espécies de caramujos Biomphalaria encontrados em municípios mineiros pertencentes à Estrada Real, um importante projeto de turismo brasileiro. MÉTODOS: Os moluscos foram coletados em 36 municípios da Estrada Real, no sudeste de Minas Gerais. A pesquisa foi realizada de agosto de 2005 a setembro de 2009 e todos os locais visitados foram georreferenciados com o uso de GPS. RESULTADOS: Dos 36 municípios estudados, 30 apresentaram a ocorrência de pelo menos uma entre as seis espécies de Biomphalaria: glabrata, tenagophila, straminea, peregrina, occidentalis e schrammi. As três primeiras espécies citadas, reconhecidas como hospedeiras intermediárias do S. mansoni, estavam presentes em 33,3%, 47,2% e 8,3% dos municípios estudados, respectivamente. Os moluscos foram encontrados em diferentes tipos de coleções hídricas e em nenhum deles foi detectada infecção pelo S. mansoni. Houve maior ocorrência de Biomphalaria na área referente ao Caminho Novo (Diamantina/MG ao Rio de Janeiro/RJ). CONCLUSÕES: Considerando-se a ocorrência da esquistossomose, no Estado de Minas Gerais, e as repercussões socioeconômicas que envolvem o projeto Estrada Real, este trabalho aponta para a vulnerabilidade das coleções hídricas devido à presença de moluscos Biomphalaria e enfatiza a necessidade de vigilância epidemiológica e medidas educativas e sanitárias integradas com a comunidade local e setores de turismo

Disabling hearing loss prevalence in Juiz de Fora, Brazil

Data on the prevalence of disabling hearing loss (DHL) in Brazil is scarce, which impacts healthcare professionals' knowledge on the extent of the problem. Objectives: This study aimed at estimating DHL prevalence in the municipality of Juiz de Fora, Minas Gerais, to identify individual-related variables and find risk areas. Materials and Methods: This was a descriptive sectional population study held from January to October of 2009. We randomly selected 349 households with 1,050 individuals who with ages ranging between 4 days and 95 years. The data collection instruments were: WHO structured questionnaire, ENT examination and laboratory tests. Chi-square and Poisson regression models were used for analyses. Results: DHL prevalence was estimated at 5.2% (95% CI = 3.1 to 7.3) which was classified as moderate in 3.9% (95% CI = 0.001 to 0.134), severe in 0.9% (95% CI = 0.001 to 0.107) and profound in 0.4% (95% CI = 0.001 to 0.095). We found correlation between DHL and tinnitus; age over 60 years and low educational level. Conclusions: Our data obtained pointed to the need to create hearing health programs targeted to specific risk groups, promoting quality of life for hearing impaired patients

Tumors defective in homologous recombination rely on oxidative metabolism: relevance to treatments with PARP inhibitors

Mitochondrial metabolism and the generation of reactive oxygen species (ROS) contribute to the acquisition of DNA mutations and genomic instability in cancer. How genomic instability influences the metabolic capacity of cancer cells is nevertheless poorly understood. Here, we show that homologous recombination-defective (HRD) cancers rely on oxidative metabolism to supply NAD+ and ATP for poly(ADP-ribose) polymerase (PARP)-dependent DNA repair mechanisms. Studies in breast and ovarian cancer HRD models depict a metabolic shift that includes enhanced expression of the oxidative phosphorylation (OXPHOS) pathway and its key components and a decline in the glycolytic Warburg phenotype. Hence, HRD cells are more sensitive to metformin and NAD+ concentration changes. On the other hand, shifting from an OXPHOS to a highly glycolytic metabolism interferes with the sensitivity to PARP inhibitors (PARPi) in these HRD cells. This feature is associated with a weak response to PARP inhibition in patient-derived xenografts, emerging as a new mechanism to determine PARPi sensitivity. This study shows a mechanistic link between two major cancer hallmarks, which in turn suggests novel possibilities for specifically treating HRD cancers with OXPHOS inhibitors

Investigação de patógenos virais associados à gastrenterite infantil aguda

A gastrenterite de etiologia viral está associada com altas taxas de morbidade, no mundo, sendo nos países em desenvolvimento, responsável também, por altos índices de mortalidade infantil. Este trabalho objetiva detectar a presença de rotavírus, adenovírus e astrovírus em casos de doença diarréica, acompanhar a dinâmica populacional dos rotavírus e avaliar a prevalência e a sazonalidade dessas infecções. A detecção de rotavírus e adenovírus foi realizada através da técnica de ensaio imunoenzimático (EIE). As amostras de rotavírus foram submetidas à eletroforese em gel de poliacrilamida (PAGE) para avaliação dos perfis eletroforéticos e acompanhamento da dinâmica populacional. A detecção de astrovírus foi realizada através da reação em cadeia da polimerase (RT-PCR). Das 338 amostras fecais testadas para rotavírus, foram detectadas 61 positivas (18,04%). A análise eletroforética mostrou a circulação de amostras com perfis característicos de rotavírus do grupo A, todos longos em 2005 e longos e curtos, com predominância dos últimos, em 2006. Das 316 amostras testadas para a presença de adenovírus e das 131 testadas para astrovírus, foram detectadas 17 (5,38%) e 2 (1,53%), respectivamente. Os resultados demonstram a participação destes vírus em casos de gastrenterite infantil e apontam para a importância da continuidade deste estudo

Jornada de Colaboración Científica en Seguridad y Defensa

Datos técnicos: 340 minutos, color, español. Ficha técnica: Gabinete de Presidencia CSIC y Departamento de Comunicación. Emitido en directo el 31 mayo 2023El Consejo Superior de Investigaciones Científicas (CSIC) organiza una JORNADA DE COLABORACIÓN CIENTÍFICA EN SEGURIDAD Y DEFENSA el próximo día 31 de mayo. En este evento se buscará potenciar las colaboraciones del CSIC en las áreas de seguridad y defensa con socios y colaboradores externos públicos y privados. La Jornada se dividirá en cuatro cápsulas en las que investigadores presentarán la investigación que se hace en el Consejo en seguridad digital y globalizada; sensores, vigilancia y teledetección para la defensa; riesgos biológicos; y las oportunidades de financiación en proyectos colaborativos competitivos. Finalizará con un coloquio en el que diversos actores debatirán sobre el avance científico en defensa y seguridad y su impacto social.Peer reviewe

Identification of common genetic risk variants for autism spectrum disorder

Autism spectrum disorder (ASD) is a highly heritable and heterogeneous group of neurodevelopmental phenotypes diagnosed in more than 1% of children. Common genetic variants contribute substantially to ASD susceptibility, but to date no individual variants have been robustly associated with ASD. With a marked sample-size increase from a unique Danish population resource, we report a genome-wide association meta-analysis of 18,381 individuals with ASD and 27,969 controls that identified five genome-wide-significant loci. Leveraging GWAS results from three phenotypes with significantly overlapping genetic architectures (schizophrenia, major depression, and educational attainment), we identified seven additional loci shared with other traits at equally strict significance levels. Dissecting the polygenic architecture, we found both quantitative and qualitative polygenic heterogeneity across ASD subtypes. These results highlight biological insights, particularly relating to neuronal function and corticogenesis, and establish that GWAS performed at scale will be much more productive in the near term in ASD

Genomic Relationships, Novel Loci, and Pleiotropic Mechanisms across Eight Psychiatric Disorders

Genetic influences on psychiatric disorders transcend diagnostic boundaries, suggesting substantial pleiotropy of contributing loci. However, the nature and mechanisms of these pleiotropic effects remain unclear. We performed analyses of 232,964 cases and 494,162 controls from genome-wide studies of anorexia nervosa, attention-deficit/hyper-activity disorder, autism spectrum disorder, bipolar disorder, major depression, obsessive-compulsive disorder, schizophrenia, and Tourette syndrome. Genetic correlation analyses revealed a meaningful structure within the eight disorders, identifying three groups of inter-related disorders. Meta-analysis across these eight disorders detected 109 loci associated with at least two psychiatric disorders, including 23 loci with pleiotropic effects on four or more disorders and 11 loci with antagonistic effects on multiple disorders. The pleiotropic loci are located within genes that show heightened expression in the brain throughout the lifespan, beginning prenatally in the second trimester, and play prominent roles in neurodevelopmental processes. These findings have important implications for psychiatric nosology, drug development, and risk prediction.Peer reviewe