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Type C botulism outbreak in free-ranging waterfowl in Goiás
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Martins, Andressa S.

; Silva, Tamires A.

; Rosa, Isabella C.C.R.

; Oliveira, Alexia G.F.

; Oliveira, Márcio P.

; Saraiva, Júlia R.

; Dutra, Iveraldo S.

; Borsanelli, Ana Carolina

Pesquisa Veterinária Brasileira

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2022, Volume 42 elocation e07166

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO: O botulismo é uma doença geralmente fatal, causada pela ingestão de neurotoxinas produzidas pelo Clostridium botulinum. O presente estudo descreve os aspectos epidemiológicos, clínicos e laboratoriais de um surto de botulismo tipo C em aves aquáticas de vida livre habitantes de parque urbano em Quirinópolis, Goiás. De uma população de cerca de 80 aves aquáticas, um total de 30 aves, entre patos (Cairina moschata), marrecos (Anas platyrhynchos) e gansos (Anser cygnoides), morreram no intervalo de 10 dias. Destes, seis aves apresentaram sinais de paralisia flácida de membros pélvicos, pálpebras, pescoço e asas. Para confirmar a suspeita de botulismo, foram analisadas quatro amostras da água do lago, duas amostras da ração consumida pelas aves e amostras de soro, conteúdo intestinal, conteúdo estomacal e fígado de dois marrecos que morreram após apresentarem os sinais clínicos. Pelo bioensaio e neutralização com antitoxina homóloga em camundongos foi possível detectar a presença de toxina botulínica tipo C em uma amostra de água e no conteúdo intestinal de um dos marrecos necropsiados. Adicionalmente, pela reação em cadeia da polimerase identificou-se a presença de C. botulinum tipo C na água do lago. Com base nos sinais clínicos e resultados laboratoriais estabeleceu-se o diagnóstico de botulismo causado pela toxina botulínica tipo C e veiculada provavelmente pela água do lago.

ABSTRACT: Botulism is generally a fatal disease caused by ingestion of neurotoxins produced by Clostridium botulinum. The present study describes the epidemiological, clinical, and laboratory aspects of a type C botulism outbreak in free-living aquatic birds residing in an urban park in Quirinópolis, Goiás, Brazil. Among a population of approximately 80 waterfowl, a total of 30 birds, including ducks (Cairina moschata), teals (Anas platyrhynchos), and geese (Anser cygnoides), died within 10 days. Of these, six birds showed signs of flaccid paralysis of the pelvic limbs, eyelids, neck, and wings. To confirm the suspicion of botulism, four lake water samples, two samples of the feed consumed by the birds, and samples of serum, intestinal content, stomach content, and liver tissue from two teals that died after presenting clinical signs were analyzed. Using bioassay and neutralization with homologous antitoxin in mice, it was possible to detect the presence of botulinum toxin type C in a water sample and in the intestinal content of one of the necropsied teals. Additionally, the presence of C. botulinum type C was identified in the lake water using polymerase chain reaction. Based on the clinical signs and laboratory results, a diagnosis of botulism caused by botulinum toxin type C was confirmed with probable transmission by lake water.

https://doi.org/10.1590/1678-5150-pvb-7166

Cardiomyopathy and cardiac function in fetuses and newborns of diabetic mothers
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Bogo, Maria Augusta

; Pabis, Julia S

; Bonchoski, Ana B

; Santos, Dercília C. dos

; Pinto, Tainá J.F

; Simões, Mona A

; Silva, Jean C

; Pabis, Francisco C

Jornal de Pediatria

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oct 2021, Volume 97 N. 5 Pages 520 - 524

Abstract: En | Text: En | PDF: En

Abstract Objective: To evaluate cardiac function and structural changes in children of diabetic mothers in the fetal and neonatal period using Doppler-echocardiographic data. Method: A prospective, descriptive observational study conducted in a private and tertiary care service for high-risk pregnant women. It included 48 children of mothers with gestational diabetes mellitus (GDM) considered clinically compensated during pregnancy, with a single fetus and absence of malformations. Myocardial thickness, shortening fraction, left ventricular (LVMPI) and right ventricular (RVMPI) myocardial performance index, and mitral and tricuspid valve E/A ratio were evaluated in 96 echocardiographic exams with Doppler. Results: The hypertrophic cardiomyopathy was 29% vs 6% p = 0.006 in the prenatal and postnatal periods respectively. The shortening fraction was 0% vs 6% p = 0.242 in the fetuses and newborns respectively. The myocardial performance index of the right ventricle was 12% vs 54% p ≤ 0.001, and on the left ventricle 27% vs 60% p = 0.001 in the prenatal and postnatal periods respectively. The ratio of mitral valve E/A waves was 6% vs 50% p ≤ 0.001 and the ratio of tricuspid valve E/A waves was 0% vs 27% p 0.001 in the fetuses and newborns respectively. Conclusion: A decrease in the rate of myocardial hypertrophy and changes in cardiac function parameters were observed in the fetal and neonatal periods.

https://doi.org/10.1016/j.jped.2020.10.003 46 downloads

Relative validity of a semi-quantitative food frequency questionnaire for adolescents
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Silva, Ana Lúcia

; Fragoso, Maria Isabel Caldas Januário

; Santos Neto, Francília Maria Carvalho dos

; Bento, Cristina Paula Fidalgo Negreiros Monteiro

; Teles, Júlia Maria Vitorino

Portuguese Journal of Public Health

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apr 2020, Volume 38 N. 2 Pages 71 - 80

Abstract: En | Text: En | PDF: En

Abstract Introduction: A valid food frequency questionnaire (FFQ) is a priority for epidemiological studies. We aimed to perform a relative validity of an FFQ for Portuguese adolescents. Methods: A semi-quantitative Portuguese FFQ (SQ-PortFood-FQ) was developed and the relative validity performed using the multiple-pass 24-h recall. Eighty adolescents (aged 10-17 years) completed both questionnaires to measure energy intake, macroand specific micronutrient intake. We used the following methods for the relative validity: (1) Spearman’s correlation coefficient (r); (2) cross-classification into the same third (agreement) and into the opposite third (disagreement); (3) weighted κ-coefficient (κW); (4) and the Bland-Altman method. Results: We obtained acceptable correlation coefficients between questionnaires for energy (r = 0.59; p < 0.001), protein (r = 0.60; p < 0.001), fat (r = 0.55; p < 0.001), carbohydrates (r = 0.51; p < 0.001) and sodium (r = 0.51; p < 0.001). Tertile agreement for energy, protein, fat, carbohydrates and vitamin C intakes classified correctly more than 50% and grossly misclassified less than 10% of participants. Energy and protein produced moderate agreement between methods with a κW >0.40. The SQ-PortFoodFQ overestimated all analysed data when compared to the 24-h recall, although those estimations were <10% for energy, macronutrients and cholesterol. The 95% limits of agreement showed that all the variables (energy, protein, fat, carbohydrates, fibre, calcium, sodium, iron, saturated fatty acids, monounsaturated fatty acids and cholesterol) were within the desirable limits of agreement of 50-200%, with the exception of vitamin C (76-296%) and polyunsaturated fatty acids (PUFA) (75-232%). Discussion/Conclusion: The SQ-PortFood-FQ showed acceptable relative validity at the individual level for energy, protein, fat, carbohydrates, fibre, calcium, sodium, iron, saturated fatty acids, monounsaturated fatty acids and cholesterol. Non-significant relationships were found for vitamin C and PUFA. Our results are in line with previous studies carried out amongst adolescents. As far as we know this is the first FFQ validated for Portuguese adolescents.

https://doi.org/10.1159/000510464 53 downloads

Association of taste receptor gene polymorphisms with dental caries
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ARID, Juliana

; ANTUNES, Lívia Azeredo Alves

; KOCH, Luiza Foltran de Azevedo

; EVANGELISTA, Silvane Silva

; VASCONCELOS, Katia Regina Felizardo

; BRANCHER, João Armando

; GABARDO, Marilisa Carneiro Leão

; MILANI, Ana Julia

; DUTRA, André Luiz Tannus

; ANTUNES, Leonardo Santos

; VIEIRA, Alexandre Rezende

; FELTRIN-SOUZA, Juliana

; KÜCHLER, Erika Calvano

Brazilian Oral Research

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2020, Volume 34 elocation e055

Abstract: En | Text: En | PDF: En

Abstract This study was performed to evaluate the interplay between dental caries, nutritional status, and genetic polymorphisms in TAS1R1 and TAS1R2 (taste receptor, type 1, member 1 and 2) in preschool children and pre-adolescents. We included 525 subjects (306 preschool children and 219 pre-adolescents). Parents/caregivers answered a self-administered questionnaire about their children’s systemic health, characteristics, oral hygiene habits, and diet. Clinical examination was performed to evaluate dental caries and nutritional status. Saliva samples were collected for DNA extraction. The genotyping of rs17492553 ( TAS1R1 ), rs3935570, and rs4920566 ( TAS1R2 ) polymorphisms was performed using real-time PCR with Taqman Genotyping Master Mix and SNP assay. Both univariate and multivariate Poisson regression analyses with robust variance were used for the data analysis. In preschool children, consumption of sweets between meals increased the prevalence of dental caries by 85% (PR c = 1.85; 95%CI 1.39–2.46; p < 0.001), whereas in pre-adolescents, this prevalence increased by 34% (PR a = 1.34; 95%CI 1.11–1.62; p = 0.002), regardless of genetic polymorphisms . Moreover, individuals carrying at least one allele C in rs17492553 presented 23% more prevalence of dental caries (PR a = 1.23; 95%CI 1.02–1.49 p = 0.030). Nutritional status was not associated with dental caries, neither with genetic polymorphisms . Consumption of sweets between meals increased the prevalence of dental caries. In pre-adolescents, rs17492553 genetic polymorphism in TAS1R1 was associated with dental caries.

https://doi.org/10.1590/1807-3107bor-2020.vol34.0055 1072 downloads

ERICA: prevalence of metabolic syndrome in Brazilian adolescents
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Kuschnir, Maria Cristina C

; Bloch, Katia Vergetti

; Szklo, Moyses

; Klein, Carlos Henrique

; Barufaldi, Laura Augusta

; Abreu, Gabriela de Azevedo

; Schaan, Beatriz

; Veiga, Gloria Valeria da

; Silva, Thiago Luiz Nogueira da

; Vasconcellos, Maurício T L de

; Moraes, Ana Júlia Pantoja de

; Oliveira, Ana Mayra Andrade de

; Tavares, Bruno Mendes

; Oliveira, Cecília Lacroix de

; Cunha, Cristiane de Freitas

; Giannini, Denise Tavares

; Belfort, Dilson Rodrigues

; Santos, Eduardo Lima

; Leon, Elisa Brosina de

; Oliveira, Elizabete Regina Araújo

; Fujimori, Elizabeth

; Borges, Ana Luíza

; Magliano, Erika da Silva

; Vasconcelos, Francisco de Assis Guedes

; Azevedo, George Dantas

; Brunken, Gisela Soares

; Guimarães, Isabel Cristina Britto

; Faria Neto, José Rocha

; Oliveira, Juliana Souza

; Carvalho, Kenia Mara B de

; Gonçalves, Luis Gonzaga de Oliveira

; Monteiro, Maria Inês

; Santos, Marize M

; Muniz, Pascoal Torres

; Jardim, Paulo César B Veiga

; Ferreira, Pedro Antônio Muniz

; Montenegro Jr, Renan Magalhães

; Gurgel, Ricardo Queiroz

; Vianna, Rodrigo Pinheiro

; Vasconcelos, Sandra Mary

; Martins, Stella Maris Seixas

; Goldberg, Tamara Beres Lederer

Revista de Saúde Pública

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2016, Volume 50 Suppl. 1 elocation 11s

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO OBJETIVO Determinar a prevalência de síndrome metabólica e de seus componentes em adolescentes brasileiros. MÉTODOS Foram avaliados 37.504 adolescentes, participantes do Estudo de Riscos Cardiovasculares em Adolescentes (ERICA), estudo transversal de âmbito nacional e de base escolar. Os adolescentes, de 12 a 17 anos de idade, residiam em municípios com mais de 100 mil habitantes. A amostra foi estratificada e conglomerada em escolas e turmas. Os critérios da International Diabetes Federation foram utilizados para definir síndrome metabólica. Prevalências de síndrome metabólica foram estimadas segundo sexo, faixa etária, tipo de escola e estado nutricional. RESULTADOS Dos 37.504 adolescentes, 50,2% eram do sexo feminino; 54,3% tinham de 15 a 17 anos e 73,3% estudavam em escolas públicas. A prevalência nacional de síndrome metabólica foi 2,6% (IC95% 2,3-2,9), discretamente maior no sexo masculino e naqueles de 15 a 17 anos na maioria das macrorregiões. A prevalência foi a maior nos residentes na macrorregião Sul, nas adolescentes mais jovens e nos adolescentes mais velhos. A prevalência foi maior nas escolas públicas (2,8% [IC95% 2,4-3,2]) que nas escolas privadas (1,9% [IC95% 1,4-2,4]) e nos adolescentes obesos em comparação aos não obesos. As combinações de componentes mais frequentes, respondendo por 3/4 das combinações, foram: circunferência de cintura elevada, HDL-colesterol baixo e pressão arterial elevada, seguida de circunferência da cintura elevada, lipoproteína de alta densidade (HDL-c) baixo e triglicerídeos elevados, e wpor circunferência da cintura elevada, HDL baixa e triacilgliceróis e pressão arterial elevados. A HDL baixa foi o segundo componente mais frequente, mas a maior prevalência de síndrome metabólica (26,8%) foi observada na presença de triglicerídeos elevado. CONCLUSÕES O ERICA é o primeiro estudo nacional a apresentar prevalências de síndrome metabólica e descrever a participação dos seus componentes. Apesar de a prevalência da síndrome metabólica ter sido baixa, as altas prevalências de alguns componentes e de participação de outros na composição da síndrome torna importante o diagnóstico precoce de tais alterações, mesmo que não agrupadas na síndrome metabólica.

ABSTRACT OBJECTIVE To determine the prevalence of metabolic syndrome and its components in Brazilian adolescents. METHODS We evaluated 37,504 adolescents who were participants in the Study of Cardiovascular Risks in Adolescents (ERICA), a cross-sectional, school-based, national study. The adolescents, aged from 12 to 17 years, lived in cities with populations greater than 100,000 inhabitants. The sample was stratified and clustered into schools and classes. The criteria set out by the International Diabetes Federation were used to define metabolic syndrome. Prevalences of metabolic syndrome were estimated according to sex, age group, school type and nutritional status. RESULTS Of the 37,504 adolescents who were evaluated: 50.2% were female; 54.3% were aged from 15 to 17 years, and 73.3% were from public schools. The prevalence of metabolic syndrome was 2.6% (95%CI 2.3-2.9), slightly higher in males and in those aged from 15 to 17 years in most macro-regions. The prevalence was the highest in residents from the South macro-region, in the younger female adolescents and in the older male adolescents. The prevalence was higher in public schools (2.8% [95%CI 2.4-3.2]), when compared with private schools (1.9% [95%CI 1.4-2.4]) and higher in obese adolescents when compared with nonobese ones. The most common combinations of components, referring to 3/4 of combinations, were: enlarged waist circumference (WC), low HDL-cholesterol (HDL-c) and high blood pressure; followed by enlarged WC, low HDL-c and high triglycerides; and enlarged WC, low HDL-c, high triglycerides and blood pressure. Low HDL was the second most frequent component, but the highest prevalence of metabolic syndrome (26.8%) was observed in the presence of high triglycerides. CONCLUSIONS ERICA is the first Brazilian nation-wide study to present the prevalence of metabolic syndrome and describe the role of its components. Despite the prevalence of Metabolic Syndrome being low, the high prevalences of some components and participation of others in the syndrome composition shows the importance of early diagnosis of this changes, even if not grouped within the metabolic syndrome.

https://doi.org/10.1590/s01518-8787.2016050006701 1789 downloads

ERICA: prevalences of hypertension and obesity in Brazilian adolescents
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Bloch, Katia Vergetti

; Klein, Carlos Henrique

; Szklo, Moyses

; Kuschnir, Maria Cristina C

; Abreu, Gabriela de Azevedo

; Barufaldi, Laura Augusta

; Veiga, Gloria Valeria da

; Schaan, Beatriz

; Silva, Thiago Luiz Nogueira da

; Moraes, Ana Julia Pantoja

; Oliveira, Ana Mayra Andrade de

; Tavares, Bruno Mendes

; Magliano, Erika da Silva

; Oliveira, Cecília Lacroix de

; Cunha, Cristiane de Freitas

; Giannini, Denise Tavares

; Belfort, Dilson Rodrigues

; Santos, Eduardo Lima

; Leon, Elisa Brosina de

; Oliveira, Elizabete Regina Araújo

; Fujimori, Elizabeth

; Borges, Ana Luíza

; Vasconcelos, Francisco de Assis Guedes

; Azevedo, George Dantas

; Brunken, Gisela Soares

; Guimarães, Isabel Cristina Britto

; Faria Neto, José Rocha

; Oliveira, Juliana Souza

; Carvalho, Kenia Mara B. de

; Gonçalves, Luis Gonzaga de Oliveira

; Monteiro, Maria Inês

; Santos, Marize M.

; Jardim, Paulo César B. Veiga

; Ferreira, Pedro Antônio Muniz

; Montenegro Jr., Renan Magalhães

; Gurgel, Ricardo Queiroz

; Vianna, Rodrigo Pinheiro

; Vasconcelos, Sandra Mary

; Goldberg, Tamara Beres Lederer

Revista de Saúde Pública

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2016, Volume 50 Suppl. 1 elocation 9s

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO OBJETIVO Estimar as prevalências de hipertensão arterial e obesidade e a fração atribuível populacional de hipertensão arterial devida à obesidade em adolescentes brasileiros. MÉTODOS Foram avaliados dados dos participantes do Estudo de Riscos Cardiovasculares em Adolescentes, estudo seccional l nacional de base escolar. A amostra foi dividida em 32 estratos geográficos e conglomerados de escolas e turmas, com representatividade nacional, macrorregional e de capitais. Obesidade foi classificada pelo índice de massa corporal segundo idade e sexo. Considerou-se hipertensão arterial a média da pressão arterial sistólica ou diastólica maior ou igual ao percentil 95 da curva de referência. Foram estimadas prevalências e intervalos de confiança de 95% (IC95%) de hipertensão arterial e de obesidade, nacionais e nas macrorregiões do País, por sexo e grupo etário, assim como as frações de hipertensão atribuíveis à obesidade na população. RESULTADOS Foram avaliados 73.399 estudantes, 55,4% do sexo feminino, com média de idade 14,7 anos (DP = 1,6). A prevalência de hipertensão arterial foi 9,6% (IC95% 9,0-10,3); sendo as mais baixas observadas nas regiões Norte, 8,4% (IC95% 7,7-9,2) e Nordeste, 8,4% (IC95% 7,6-9,2) e a mais alta na região Sul, 12,5% (IC95% 11,0-14,2). A prevalência de obesidade foi 8,4% (IC95% 7,9-8,9), mais baixa na região Norte e mais alta na Sul. As prevalências de hipertensão arterial e obesidade foram maiores no sexo masculino. Adolescentes com obesidade tiveram prevalência de hipertensão arterial mais elevada, 28,4% (IC95% 25,5-31,2), do que aqueles com sobrepeso, 15,4% (IC95% 13,8-17,0), ou eutróficos, 6,3% (IC95% 5,6-7,0). A fração de hipertensão arterial atribuível à obesidade foi de 17,8%. CONCLUSÕES O ERICA foi o primeiro estudo brasileiro com representatividade nacional a estimar a prevalência de hipertensão arterial aferida em adolescentes. A fração da prevalência de hipertensão arterial atribuível à obesidade mostrou que cerca de 1/5 dos hipertensos poderiam não ser hipertensos se não fossem obesos.

ABSTRACT OBJECTIVE To estimate the prevalence of arterial hypertension and obesity and the population attributable fraction of hypertension that is due to obesity in Brazilian adolescents. METHODS Data from participants in the Brazilian Study of Cardiovascular Risks in Adolescents (ERICA), which was the first national school-based, cross-section study performed in Brazil were evaluated. The sample was divided into 32 geographical strata and clusters from 32 schools and classes, with regional and national representation. Obesity was classified using the body mass index according to age and sex. Arterial hypertension was defined when the average systolic or diastolic blood pressure was greater than or equal to the 95th percentile of the reference curve. Prevalences and 95% confidence intervals (95%CI) of arterial hypertension and obesity, both on a national basis and in the macro-regions of Brazil, were estimated by sex and age group, as were the fractions of hypertension attributable to obesity in the population. RESULTS We evaluated 73,399 students, 55.4% female, with an average age of 14.7 years (SD = 1.6). The prevalence of hypertension was 9.6% (95%CI 9.0-10.3); with the lowest being in the North, 8.4% (95%CI 7.7-9.2) and Northeast regions, 8.4% (95%CI 7.6-9.2), and the highest being in the South, 12.5% (95%CI 11.0-14.2). The prevalence of obesity was 8.4% (95%CI 7.9-8.9), which was lower in the North region and higher in the South region. The prevalences of arterial hypertension and obesity were higher in males. Obese adolescents presented a higher prevalence of hypertension, 28.4% (95%CI 25.5-31.2), than overweight adolescents, 15.4% (95%CI 17.0-13.8), or eutrophic adolescents, 6.3% (95%CI 5.6-7.0). The fraction of hypertension attributable to obesity was 17.8%. CONCLUSIONS ERICA was the first nationally representative Brazilian study providing prevalence estimates of hypertension in adolescents. Regional and sex differences were observed. The study indicates that the control of obesity would lower the prevalence of hypertension among Brazilian adolescents by 1/5.

https://doi.org/10.1590/s01518-8787.2016050006685 1511 downloads

ERICA: prevalences of hypertension and obesity in Brazilian adolescents
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Bloch, Katia Vergetti

; Klein, Carlos Henrique

; Szklo, Moyses

; Kuschnir, Maria Cristina C

; Abreu, Gabriela de Azevedo

; Barufaldi, Laura Augusta

; Veiga, Gloria Valeria da

; Schaan, Beatriz

; Silva, Thiago Luiz Nogueira da

; Moraes, Ana Julia Pantoja

; Oliveira, Ana Mayra Andrade de

; Tavares, Bruno Mendes

; Magliano, Erika da Silva

; Oliveira, Cecília Lacroix de

; Cunha, Cristiane de Freitas

; Giannini, Denise Tavares

; Belfort, Dilson Rodrigues

; Santos, Eduardo Lima

; Leon, Elisa Brosina de

; Oliveira, Elizabete Regina Araújo

; Fujimori, Elizabeth

; Borges, Ana Luíza

; Vasconcelos, Francisco de Assis Guedes

; Azevedo, George Dantas

; Brunken, Gisela Soares

; Guimarães, Isabel Cristina Britto

; Faria Neto, José Rocha

; Oliveira, Juliana Souza

; Carvalho, Kenia Mara B. de

; Gonçalves, Luis Gonzaga de Oliveira

; Monteiro, Maria Inês

; Santos, Marize M.

; Jardim, Paulo César B. Veiga

; Ferreira, Pedro Antônio Muniz

; Montenegro Jr., Renan Magalhães

; Gurgel, Ricardo Queiroz

; Vianna, Rodrigo Pinheiro

; Vasconcelos, Sandra Mary

; Goldberg, Tamara Beres Lederer

Revista de Saúde Pública

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2016, Volume 50 Suppl. 1 elocation 9s

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

https://doi.org/10.1590/s01518-8787.2016050006685 18629 downloads

ERICA: prevalence of metabolic syndrome in Brazilian adolescents
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Kuschnir, Maria Cristina C

; Bloch, Katia Vergetti

; Szklo, Moyses

; Klein, Carlos Henrique

; Barufaldi, Laura Augusta

; Abreu, Gabriela de Azevedo

; Schaan, Beatriz

; Veiga, Gloria Valeria da

; Silva, Thiago Luiz Nogueira da

; Vasconcellos, Maurício T L de

; Moraes, Ana Júlia Pantoja de

; Oliveira, Ana Mayra Andrade de

; Tavares, Bruno Mendes

; Oliveira, Cecília Lacroix de

; Cunha, Cristiane de Freitas

; Giannini, Denise Tavares

; Belfort, Dilson Rodrigues

; Santos, Eduardo Lima

; Leon, Elisa Brosina de

; Oliveira, Elizabete Regina Araújo

; Fujimori, Elizabeth

; Borges, Ana Luíza

; Magliano, Erika da Silva

; Vasconcelos, Francisco de Assis Guedes

; Azevedo, George Dantas

; Brunken, Gisela Soares

; Guimarães, Isabel Cristina Britto

; Faria Neto, José Rocha

; Oliveira, Juliana Souza

; Carvalho, Kenia Mara B de

; Gonçalves, Luis Gonzaga de Oliveira

; Monteiro, Maria Inês

; Santos, Marize M

; Muniz, Pascoal Torres

; Jardim, Paulo César B Veiga

; Ferreira, Pedro Antônio Muniz

; Montenegro Jr, Renan Magalhães

; Gurgel, Ricardo Queiroz

; Vianna, Rodrigo Pinheiro

; Vasconcelos, Sandra Mary

; Martins, Stella Maris Seixas

; Goldberg, Tamara Beres Lederer

Revista de Saúde Pública

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2016, Volume 50 Suppl. 1 elocation 11s

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

https://doi.org/10.1590/s01518-8787.2016050006701 11875 downloads

Protective microcirculatory and anti-inflammatory effects of heparin on endotoxemic hamsters
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Miranda, Marcos L.

; Prota, Luiz Felipe M.

; Silva, Maria Júlia B.

; Sicuro, Fernando L.

; Furtado, Eliane S.

; Santos, Ana Olimpia M.T.

; Bouskela, Eliete

MedicalExpress

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jun 2014, Volume 1 N. 3 Pages 127 - 134

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO OBJETIVO: Além de suas propriedades anticoagulantes, a heparina apresenta efeitos vasodilatadores e anti-inflamatórios que podem ajudar na reversão das alterações sépticas da microcirculação. Este artigo investiga os efeitos da heparina sobre alterações da microcirculação relacionadas com endotoxemia e compara-os com os observados com o uso de proteína C humana recombinante ativada. MÉTODOS: Após os procedimentos de implantação da câmara de dobras cutâneas e indução de endotoxemia por administração intravenosa de lipopolissacarídeo da Escherichia coli (2mg.kg-1), hamsters sírios dourados machos foram tratados com heparina não fracionada intravenosa (0,2 mg. kg-1). A microscopia intravital de preparações de câmara de dobras cutâneas permitiu a análise quantitativa de variáveis microvasculares e venulares, bem como de rolamento e aderência de leucócitos. Parâmetros micro-hemodinâmicos também foram analisados. Hamsters endotoxêmicos tratados com proteína C humana recombinants ativada e animais não tratados serviram como controles. RESULTADOS: A heparina diminuiu o rolamento de leucócitos e a vasoconstricção arteriolar induzida por lipopolissacarídeo e produziu um aumento de sobrevida em comparação com animais não tratados, enquanto proteína C humana recombinants ativada diminuiu a adesão de leucócitos. A administração de heparina mais proteína C humana recombinante ativada resultou numa significativa atenuação dos déficits de perfusão capilar induzida por lipopolissacarídeo. CONCLUSÕES: A heparina produz efeitos protetores sobre a microcirculação dos animais endotoxêmicos. Estas vantagens foram potenciados quando a heparina foi administrada em combinação com proteína C humana recombinante ativada.

OBJECTIVE: Apart from its anticoagulant properties, heparin has vasodilator and anti-inflammatory effects that could assist in the reversal of septic microcirculatory changes. This paper investigates the effects of heparin on endotoxemia-related microcirculatory changes and compares them to those observed with the use of recombinant human activated protein C. METHODS: After skinfold chamber implantation procedures and endotoxemia induction by intravenous Escherichia coli lipopolysaccharide administration (2 mg.kg-1), male golden Syrian hamsters were treated with intravenous unfractionated heparin (0.2 mg.kg-1). Intravital microscopy of skinfold chamber preparations allowed quantitative analysis of microvascular variables and venular leukocyte rolling and adhesion. Macrohemodynamic parameters were also analyzed. Endotoxemic hamsters treated with recombinant human activated protein C and non-treated animals served as controls. RESULTS: Heparin decreased lipopolysaccharide-induced leukocyte rolling and arteriolar vasoconstriction; it also increased survival when compared with non-treated animals, while recombinant human activated protein C decreased leukocyte adhesion. Administration of heparin plus recombinant human activated protein C was associated with a significant attenuation of lipopolysaccharide-induced capillary perfusion deficits. CONCLUSIONS: Heparin yields protective effects on endotoxemic animals' microcirculation. Those benefits were potentiated when heparin was administered in conjunction with recombinant human activated protein C.

https://doi.org/10.5935/MedicalExpress.2014.03.06 950 downloads

10.

Dansyl-based fluorescent films prepared by chemical and electrochemical methods: cyclic voltammetry, afm and spectrofluorimetry characterization
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Silva, Ana Julia C

; Silva Jr, José Ginaldo

; Alves Jr, Severino

; Tonholo, Josealdo

; Ribeiro, Adriana S

Journal of the Brazilian Chemical Society

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sep 2011, Volume 22 N. 9 Pages 1808 - 1815

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Filmes fluorescentes baseados em derivados de dansila foram preparados a partir de duas metodologias diferentes. Em uma delas, a superfície de um eletrodo de óxido de índio dopado com estanho (ITO) foi coberta com um filme de quitosana e o polímero foi posteriormente derivatizado com cloreto de dansila, enquanto que na outra metodologia, um filme de dansilglicina foi depositado eletroquimicamente sobre ITO. A técnica de microscopia de força atômica (AFM) foi usada para mapear a superfície dos filmes. A comparação das propriedades eletroquímicas, fotoquímicas e morfológicas destes filmes indicou que o filme de dansilglicina depositado eletroquimicamente sobre ITO apresentou resposta eletroquímica, nível de fluorescência mais intenso, maior rugosidade superficial e maior área superficial relativa em comparação com o seu homólogo quitosana-cloreto de dansila. Esse comportamento pode ser atribuído ao maior número de sítios ativos presentes na estrutura bem organizada do filme eletrodepositado em comparação com os filmes produzidos quimicamente

Dansyl-based fluorescent films were prepared by two different methods. In one of them, the surface of an indium tin oxide (ITO) electrode was coated with a film of chitosan and the polymer subsequently derivatized with dansyl chloride, whilst in the second method a film of dansylglycine was electrochemically deposited on the ITO surface. Atomic force microscopy (AFM) was employed to map the surfaces of the films. Comparison of the morphological, photochemical and electrochemical properties of these films indicated that the dansylglycine film electrodeposited on ITO exhibited electrochemical response, emitted a higher level of fluorescence, presented greater surface roughness and larger relative surface area in comparison with its dansyl chloride-chitosan counterpart. This behavior can be attributed to the higher number of active sites present in the well-organized and rough structure of the electrodeposited film in comparison with the chemically produced films

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