ABSTRACT
This study investigated the in-vitro antioxidant properties of the ovulation induction drug, clomiphene citrate, and assessed whether its effects are influenced by the Val16Ala polymorphism in the SOD2 gene, which encodes manganese superoxide dismutase enzyme. The investigation involved an in-vitro experimental protocol testing the effect of different concentrations of clomiphene citrate on antioxidant capacity, reactive oxygen species (ROS) production and peripheral blood mononuclear cell (PBMC) culture viability. A total of 58 healthy adult women were genotyped for the Val16Ala SOD2 polymorphism, and blood samples were collected to perform in-vitro experiments. ROS production and cytotoxicity assays were performed on blood and PBMC from carriers of different Val16Ala SOD2 genotypes. Clomiphene citrate exhibited antioxidant capacity and effects and decreased ROS production. The AA genotype displayed a more responsive antioxidant effect with clomiphene citrate treatment than other genotypes. AA and AV PBMC showed an increase in viability following treatment with 10 µmol/l clomiphene citrate when compared with control groups. The results suggest that clomiphene citrate exhibits antioxidant activity similar to that observed with other selective oestrogen receptor modulators, and the intensity of the effect appears to be SOD2 polymorphism dependent. This study was performed to investigate whether clomiphene citrate, a drug broadly used to evaluate reproductive function in women, presents antioxidant effects and if these effects could be influenced by genetic variation in the women. We found evidence that clomiphene citrate has some antioxidant properties similar to those observed with other selective oestrogen receptor modulators such as tamoxifen. As the antioxidant enzyme manganese superoxide dismutase (SOD2) is considered a key molecule involved in female reproductive metabolism, we also tested if a functional SOD2 gene polymorphism (Val16Ala) could influence the in-vitro antioxidant clomiphene citrate response. Significant differences of the clomiphene citrate antioxidant effect on PBMC with different Val16Ala SOD genotypes were observed in this study. Based on these results, we could speculate that alterations in SOD2 activity caused by the Val16Ala polymorphism can result in differential responses to drugs such as clomiphene citrate. In assisted reproduction clinics, clomiphene citrate is commonly used to induce ovulation, especially in patients with polycystic ovary syndrome. However, some women have clomiphene citrate resistance and either ovulation is not triggered by the drug or ovulation is induced but the pregnancy still fails. The causes of no effect of clomiphene citrate remain unclear and we cannot discard the influence of genetic effects including the Val16Ala SOD2 polymorphism. Therefore, it is important to perform complementary investigations considering the potential pharmacogenetic influence of Val16Ala SOD2 polymorphism on the treatment of polycystic ovary syndrome or in ovulation to elucidate this question.
Subject(s)
Clomiphene/pharmacology , Oxidative Stress/drug effects , Polymorphism, Single Nucleotide , Reactive Oxygen Species/metabolism , Superoxide Dismutase/genetics , Adult , Alanine/genetics , Amino Acid Substitution/genetics , Amino Acid Substitution/physiology , Cell Survival/drug effects , Cell Survival/genetics , Cells, Cultured , Female , Fertility Agents, Female/pharmacology , Genetic Association Studies , Humans , Leukocytes, Mononuclear/drug effects , Leukocytes, Mononuclear/metabolism , Leukocytes, Mononuclear/physiology , Oxidative Stress/genetics , Polymorphism, Single Nucleotide/physiology , Pregnancy , Reactive Oxygen Species/blood , Superoxide Dismutase/physiology , Valine/genetics , Young AdultABSTRACT
CONTEXT AND OBJECTIVES: Despite the decline in the prevalence of tobacco use in many countries, including Brazil, there are growing numbers of smokers who continue to smoke at a low daily rate, or less frequently (non-daily smokers). This group needs to be better characterized in order to direct preventive actions and public health policies. The aim here was to compare lifestyle, health characteristics and alcoholism problems among young adult smokers, non-daily smokers and non-smokers. DESIGN AND SETTING: This was a cross-sectional study in which volunteers from the university community and its surrounds in Santa Maria, State of Rio Grande do Sul, Brazil, were included between October 2007 and January 2008. METHODS: Out of 1240 volunteers initially contacted in a university cafeteria, a total of 728 participants of mean age 22.45 ± 3.32 years were selected for final analysis. Data were collected using structured questionnaires. RESULTS: In general, it was observed that the non-daily smokers showed intermediate characteristics in relation to the smokers and non-smokers. However, there was a significant association between non-daily smoking and alcohol abuse. The non-daily smokers presented an odds ratio of 2.4 (95 percent confidence interval: 1.10-5.48) in relation to the daily smokers and an odds ratio of 3.3 (confidence interval: 1.7-6.5) in relation to the non-smokers, with regard to presenting a positive CAGE test, thereby indicating alcohol abuse or dependence. CONCLUSION: The study suggested that non-daily smoking and alcohol consumption were concomitant behaviors.
CONTEXTO E OBJETIVO: Apesar do declínio na prevalência do tabagismo em diversos países, incluindo o Brasil, existe um número crescente de fumantes que continua a fumar em baixa quantidade diária ou com menor frequência (fumantes esporádicos). Esse grupo precisa ser mais bem caracterizado para que se possa direcionar ações preventivas e políticas de saúde pública. O objetivo foi comparar o estilo de vida, características de saúde e problemas de alcoolismo entre fumantes, fumantes esporádicos e não fumantes entre adultos jovens. TIPO DE ESTUDO E LOCAL: Estudo transversal em que se incluíram voluntários da comunidade universitária e do seu entorno entre outubro de 2007 a janeiro de 2008 em Santa Maria, Rio Grande do Sul, Brasil. MÉTODOS: A partir de um contato inicial com 1.240 voluntários numa cafeteria universitária, 728 participantes com idade média de 22.45 ± 3.32 anos foram selecionados para análise final. Os dados foram coletados através de um questionário estruturado. RESULTADOS: Em geral, foi observado que os fumantes esporádicos apresentaram características intermediárias em relação aos fumantes e não fumantes. Entretanto, foi encontrada uma associação significativa entre fumo esporádico e abuso de álcool. Os fumantes esporádicos apresentaram uma razão de chance de 2,4 vezes (intervalo de confiança de 1,10-5,48) em relação aos fumantes diários e uma razão de chance de 3,3 (intervalo de confiança de 1,7-6,5) em relação aos não fumantes de apresentar um teste CAGE positivo indicador de abuso ou dependência de álcool. CONCLUSÃO: O estudo sugere que o tabagismo esporádico e o consumo de álcool são comportamentos concomitantes.
Subject(s)
Female , Humans , Male , Young Adult , Alcoholism/epidemiology , Life Style , Mental Health/statistics & numerical data , Smoking/epidemiology , Brazil/epidemiology , Epidemiologic Methods , Smoking/psychologyABSTRACT
CONTEXT AND OBJECTIVES: Despite the decline in the prevalence of tobacco use in many countries, including Brazil, there are growing numbers of smokers who continue to smoke at a low daily rate, or less frequently (non-daily smokers). This group needs to be better characterized in order to direct preventive actions and public health policies. The aim here was to compare lifestyle, health characteristics and alcoholism problems among young adult smokers, non-daily smokers and non-smokers. DESIGN AND SETTING: This was a cross-sectional study in which volunteers from the university community and its surrounds in Santa Maria, State of Rio Grande do Sul, Brazil, were included between October 2007 and January 2008. METHODS: Out of 1240 volunteers initially contacted in a university cafeteria, a total of 728 participants of mean age 22.45 ± 3.32 years were selected for final analysis. Data were collected using structured questionnaires. RESULTS: In general, it was observed that the non-daily smokers showed intermediate characteristics in relation to the smokers and non-smokers. However, there was a significant association between non-daily smoking and alcohol abuse. The non-daily smokers presented an odds ratio of 2.4 (95% confidence interval: 1.10-5.48) in relation to the daily smokers and an odds ratio of 3.3 (confidence interval: 1.7-6.5) in relation to the non-smokers, with regard to presenting a positive CAGE test, thereby indicating alcohol abuse or dependence. CONCLUSION: The study suggested that non-daily smoking and alcohol consumption were concomitant behaviors.
Subject(s)
Alcoholism/epidemiology , Life Style , Mental Health/statistics & numerical data , Smoking/epidemiology , Brazil/epidemiology , Epidemiologic Methods , Female , Humans , Male , Smoking/psychology , Young AdultABSTRACT
OBJETIVO: Descrever observações morfológicas sobre o septo interatrial em fetos normais, especialmente o forame oval e o septo primeiro, de forma a comparar a excursão do septo primeiro com o diâmetro do forame oval. MÉTODOS: As medidas da excursão do septo primeiro (ESP) em direção ao átrio esquerdo (AE) e do diâmetro do forame oval (DFO) foram realizadas em corações de dez fetos humanos formolizados com 28 a 36 semanas. Os cortes histológicos foram feitos no FO, SP, septo segundo e nos AE e AD. RESULTADOS: Os resultados da análise anatômica estão expressos em amplitude das medidas do DFO e da ESP: 3 fetos com idade gestacional (IG) presumida de 28 semanas, DFO (3,1-3,5 mm) e ESP (2,8-3,1 mm); 4 fetos com IG presumida de 34 semanas, DFO (3,3-3,5 mm) e ESP (4,0-5,0 mm); e 3 fetos com IG presumida de 36 semanas, DFO (3,3-4,5 mm) e ESP (6,0-9,0). Foram identificadas fibras musculares cardíacas no SP e no segundo. CONCLUSÃO: Pode-se sugerir que o SP apresenta caráter ativo devido às fibras musculares que o constituem, influenciando o fluxo sangüíneo através do FO, a mobilidade do SP e a sua excursão para o interior do AE.
OBJECTIVE: To describe morphological features of the interatrial septum in normal fetuses, especially foramen ovale (FO) and septum primum (SP), in order to compare septum primum excursion with foramen ovale diameter. METHODS: Septum primum excursion (SPE) toward the left atrium (LA) and foramen ovale diameter (FOD) were measured in the hearts of ten formaldehyde-fixed human fetuses ranging from 28 to 36 weeks of gestation. Histological sections were obtained from the foramen ovale (FO), septum primum (SP), septum secundum (SS), left atrium (LA), and right atrium (RA). RESULTS: FOD and SPE measurements were the following: FOD 3.1-3.5 mm and SPE 2.8-3.1 mm in three fetuses with presumed gestational age (GA) of 28 weeks; FOD 3.3-3.5 mm, and SP excursion 4.0-5.0 mm in four fetuses with presumed GA of 34 weeks, plus FOD 3.3-4.5 mm and SPE 6.0-9.0 in three fetuses with presumed GA of 36 weeks. Cardiac muscular fibers were identified in both the septum primum and secundum. CONCLUSION: Based on its muscular components, it may be suggested that SP is active in character, influencing blood flow through the FO, SP mobility, and its excursion into the LA.
Subject(s)
Humans , Atrial Septum/anatomy & histology , Fetus/anatomy & histology , Foramen Ovale/anatomy & histology , Atrial Septum/embryology , Foramen Ovale/embryologyABSTRACT
Este estudo foi realizado com 44 professores médicos do curso de Medicina da Universidade Federal de Santa Maria - RS (UFSM), com o objetivo de idnetificar possíveis indicadores de mal-estar docente no grupo avaliado. A amostra foi composta por docentes com vínculo efetivo e que estavam em atividade docente por ocasião da distribuição dos questionários, sendo 33 homens e 11 mulheres. O maior número de professores (13) pertencia ao departamento de Clínica Médica, 79 por cento do total se declararam casados, tinham idade média de 48 anos e tempo de serviço médio de 19 anos. Cerca de 25 por cento eram adjuntos em relação à progressão funcional, e 75 por cento eram especialistas quanto ao nível de formação e reponsáveis por 32 disciplinas distintas. A análise dos dados demonstrou que havia indicadores de mal-estar docente em relação à avaliação do projeto profissional, do valro das metas profissionais, das expectativas tanto de eficácia como de controle, das atribuições causais de fracassos tanto na dimensão locus como na dimensão estabilidade e das estratégias de coping. Cabe destacar que 100 por cento dos pesquisadosnão tinham a intenção de atuar como professores.
Subject(s)
Humans , Education, Medical , Faculty, MedicalABSTRACT
Foram analisadas 73 histerectomias vaginais realizadas no Serviço de Ginecologia do Hospital Universitário de Santa Maria, no período de junho de 1975 a fevereiro de 1988, onde o prolapso uterino, nos seus mais variados graus, foi a principal indicaçäo cirúgica (98,6 por cento dos casos). A idade média das pacientes foi de 62,7 anos e a maior causa de prolapso foi a paridade múltipla, estando relacionado somente um caso em nulíparas. Ocorreram 58,9 por cento de complicaçöes no pós-operatório, sendo que dentre as imediatas destacou-se a retençao urinária. O granuloma de cúpula e o fluxo persistente foram as complicaçoes tardias mais encontradas. Houve um caso de óbito, ocorrido no transoperatório.
