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OBJECTIVE: Much research has been conducted to identify natural antioxidant and antimutagenic compounds capable of preventing, reverting or treating conditions caused by oxidative stress and genotoxicity. In this study we evaluated the effects of 10% gum arabic (GA) and eugenol (EUG) on hepatic oxidative stress and genotoxicity induced by dimethylhydrazine (DMH) in rats. METHODS: The prevention arm of the study included 4 control groups and 4 experimental groups. Once a week for 20 weeks, the controls received saline s.c. while the experimental groups received DMH at 20 mg/kg s.c. During the same period and for an additional 9 weeks, the animals received either water, 10% GA , EUG or 10% GA + EUG  by gavage. The treatment arm of the study included 4 control groups and 4 experimental groups. Once a week for 20 weeks, the controls received saline s.c. while the experimental groups received DMH at 20 mg/kg s.c. During the subsequent 9 weeks, the animals received either water, 10% GA, EUG or 10% GA + EUG  by gavage. Finally, the livers were harvested for histopathological study with HE, measurement of genotoxicity and oxidative stress. RESULT: Genotoxicity and oxidative stress were found to be significantly lower in Group XII (animals treated concomitantly with GA and EUG). This is the first study to observe the synergistic action of GA and EUG administered concomitantly in this scenario. CONCLUSION: Indicating a synergistic antigenotoxic and antioxidant effect on liver cells in rats with DMH-induced colorectal carcinogenesis.

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The objective of this article was to describe patterns of losses of information regarding accelerometer data and to assess the use of multiple imputation to generate physical activity estimates for individu-als without accelerometry data. Two birth cohort studies from Pelotas (Brazil) with participants aged 22 and 11-years old assessed objectively measured physical activity differences between complete and imputed cases. Mean values of overall physical activity for complete cases (n1993 = 2,985 and n2004 = 3,348) and for complete cases plus imputed cases (n1993 = 760 and n2004 = 79) were described accord-ing to predictors. Male individuals, participants with black skin color, and less schooled individuals presented higher averages of overall physical activity than their counterparts. Almost all imputed estimates were comparable to the complete cases, and the highest difference found was 0.7 mg for the first quintile of socioeconomic status of the 1993 birth cohort. Multiple imputation is a positive technique to deal with missing data from objectively measured physical activity. It provides a set of relevant variables to be used in order to efficiently predict accelerometer data

O objetivo desse artigo foi descrever os padrões de perda de informação em dados de acelerometria, além de avaliar o processo de imputação múltipla para estimar o nível de atividade física para indivíduos sem dados de acelerometria. Participantes de duas coortes de nascimentos de Pelotas (Brasil) com 22 e 11 anos participaram do estudo e diferenças entre casos completos e imputados foram avaliadas. A média geral de atividade física para os casos completos (n1993 = 2.985 e n2004 = 3.348) e para casos completos mais imputados (n1993 = 760 e n2004 = 79) foi descrita de acordo com os preditores. Indivíduos do sexo masculino, de cor da pele preta e com menor escolaridade apresentaram maiores médias de atividade física geral. Quase todas as estimativas imputadas foram comparáveis com os valores de casos completos, e a maior diferença encontrada foi 0,7 mg para o primeiro quintil de renda na coorte de 1993. Imputação múltipla é uma boa técnica para lidar com dados faltantes de atividade física medida por acelerometria. Essa técnica fornece um gama relevante de variáveis para serem usadas a fim de predizer valores de acelerometria eficientemente

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Since January 2020, studies report reductions in air pollution among several countries due to social isolation measures, which have been adopted in order to contain the coronavirus outbreak progress (COVID-19). This study aims to evaluate the change in the atmospheric pollution levels by NO and NO2 in São Paulo City for the social isolation period. The NO and NO2 hourly concentrations were obtained through air quality monitoring stations from CETESB, from January 14, 2020 to April 12, 2020. Mann-Kendall and the Pettitt tests were performed in the air pollutant time series. We observed an overall negative trend in all stations, indicating a decreasing temporal pattern in concentrations. Regarding NO, the highest absolute decrease rates were observed in the Congonhas (- 6.39 µg m-3 month-1) and Marginal Tietê (- 6.19 µg m-3 month-1) stations; regarding NO2, the highest rates were observed in the Marginal Tietê (- 4.45 µg m-3 month-1) and Cerqueira César (- 4.34 µg m-3 month-1) stations. In addition, we identified a turning point in the NO and NO2 series trends that occurred close to the start date of the social isolation period (March 20, 2020). Moreover, from statistical analysis, it was found that NO2 is a suitable surrogate for monitoring economic activities during social isolation periods. Thus, we concluded that social isolation measures implemented on March 20, 2020 caused significant changes in the air pollutant concentrations in the city of São Paulo (as high as - 200% in NO2 levels).

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OBJECTIVE:: To report a case of post-electroconvulsive therapy spontaneous seizures in a patient medicated with sertraline, bupropion and risperidone. CASE DESCRIPTION:: A 53-year-old woman with recurrent major depression was admitted to our psychiatry department for a major depressive episode of 6 weeks' duration, with psychotic symptoms. She was already on 200 mg/day of sertraline and 2 mg/day of risperidone. After 8 weeks on 200 mg/day of sertraline, 4 mg/day of risperidone and slow release bupropion (titrated to 300 mg/day), with no objective improvements, the decision was taken to initiate a course of 8-10 electroconvulsive therapy (ECT) sessions. Two days after the first treatment, three generalized tonic-clonic seizures occurred within 6 hours. Phenytoin and sodium valproate were added to the patient's daily medication and no further spontaneous seizures were observed. After neurologic assessment and discussion of the case, phenytoin and bupropion were withdrawn at once (two days after the spontaneous seizures) and the decision was taken to resume the ECT treatment. No further spontaneous seizures occurred and, at discharge, the patient exhibited significant improvements and was free from major depressive symptoms. COMMENTS:: This report illustrates a case of post-ECT spontaneous seizures that might have been due to a specific pharmacological etiological pathway, namely, bupropion's proconvulsive properties, although both sertraline and risperidone also lower the convulsive threshold.

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Abstract Objective: To report a case of post-electroconvulsive therapy spontaneous seizures in a patient medicated with sertraline, bupropion and risperidone. Case description: A 53-year-old woman with recurrent major depression was admitted to our psychiatry department for a major depressive episode of 6 weeks' duration, with psychotic symptoms. She was already on 200 mg/day of sertraline and 2 mg/day of risperidone. After 8 weeks on 200 mg/day of sertraline, 4 mg/day of risperidone and slow release bupropion (titrated to 300 mg/day), with no objective improvements, the decision was taken to initiate a course of 8-10 electroconvulsive therapy (ECT) sessions. Two days after the first treatment, three generalized tonic-clonic seizures occurred within 6 hours. Phenytoin and sodium valproate were added to the patient's daily medication and no further spontaneous seizures were observed. After neurologic assessment and discussion of the case, phenytoin and bupropion were withdrawn at once (two days after the spontaneous seizures) and the decision was taken to resume the ECT treatment. No further spontaneous seizures occurred and, at discharge, the patient exhibited significant improvements and was free from major depressive symptoms. Comments: This report illustrates a case of post-ECT spontaneous seizures that might have been due to a specific pharmacological etiological pathway, namely, bupropion's proconvulsive properties, although both sertraline and risperidone also lower the convulsive threshold.

Resumo Objetivo: Descrever o caso de uma paciente medicada com sertralina, bupropiona e risperidona que apresentou três crises tônico-clônico generalizadas espontâneas após eletroconvulsoterapia (ECT). Descrição do caso: Uma mulher de 53 anos com antecedentes de perturbação depressiva maior recorrente foi internada em nosso serviço devido a novo episódio depressivo maior com sintomas psicóticos e 6 semanas de evolução. Ela já estava medicada com 200 mg/dia de sertralina e 2 mg/dia de risperidona. Após 8 semanas usando 200 mg/dia de sertralina, 4 mg/dia de risperidona e bupropiona de liberação lenta (titulada até 300 mg/dia), sem melhoras objetivas, decidiu-se iniciar 8-10 sessões de ECT. Dois dias após a primeira sessão, ocorreram três crises tônico-clônico generalizadas num espaço de 6 horas. Foram introduzidos fenitoína e valproato de sódio no esquema terapêutico da paciente, e não ocorreram mais crises. Após avaliação neurológica e discussão do caso, optou-se por suspender a fenitoína e a bupropiona (2 dias após as crises espontâneas) e retomar a ECT. No restante do tratamento não ocorreram mais crises convulsivas espontâneas e, até data da alta, a paciente apresentava melhorias significativas e estava livre de transtorno depressivo maior. Comentários: Este relato ilustra a ocorrência de crises convulsivas espontâneas após a ECT, as quais parecem ter sido causadas por mecanismos farmacológicos etiológicos específicos, a saber, as propriedades pró-convulsivantes da bupropiona, mesmo com o uso de sertralina e risperidona, que baixam o limiar convulsivante.

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Partindo das noções de verdadeiro e falso self de Winnicott, os autores propõem-se a uma revisão desses conceitos na literatura psicanalítica contemporânea, relacionando-os com a perspectiva atual sobre o funcionamento psíquico dos pacientes com uma estrutura borderline da personalidade. Uma vinheta clínica é utilizada como ilustração e análise dessa relação.(AU)

Based on Winnicott's conceptualizations of true self and false self, the authors propose to review the notions in contemporary psychoanalytic literature, relating them to the current perspective on the psychological functioning of patients with a borderline personality structure. A clinical vignette is used as illustration and analysis of this relationship.(AU)

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We describe the case of a 44-year-old woman, without known previous psychiatric history, hospitalized after a significant hemorrhage caused by self-inflicted deep facial dermal lesions (with muscle exposition). Psychopathological possible explanations of this case, as in similar reviewed ones, are related to frustration, aggression, and impulsivity.

Descrevemos um caso clínico de uma senhora de 44 anos de idade, sem antecedentes psiquiátricos prévios, internada após hemorragia significante causada por uma lesão facial autoinfligida (com exposição de músculo). Possíveis explicações psicopatológicas deste caso, tal como em casos similares, relacionam-se com frustração, agressividade e impulsividade.

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