Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 4.359
Filtrar
Mais filtros

Intervalo de ano de publicação
1.
J Nutr ; 154(1): 133-142, 2024 01.
Artigo em Inglês | MEDLINE | ID: mdl-37992809

RESUMO

BACKGROUND: Increased serum urate (SU) and hyperuricemia (HU) are associated with chronic noncommunicable diseases and mortality. SU concentrations are affected by several factors, including diet, and are expected to rise with age. We investigated whether the Dietary Approaches to Stop Hypertension (DASH) diet alter this trend. OBJECTIVE: The objective was to assess whether adherence to the DASH diet predicts a longitudinal change in SU concentrations and risk of HU in 8 y of follow-up. METHODS: Longitudinal analyses using baseline (2008-2010, aged 35-74 y), second (2012-2014), and third (2016-2018) visits data from the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). The inclusion criteria were having complete food frequency questionnaire (FFQ) and urinary sodium measurement, in addition to having SU measurement at the 1st visit and at least 1 of the 2 follow-up visits. For the HU incidence analyses, participants had also to be free from HU at baseline. The final samples included 12575 individuals for the SU change analyses and 10549 for the HU incidence analyses. Adherence to DASH diet was assessed as continuous value. HU was defined as SU>6.8 mg/dL and/or urate-lowering therapy use. Mixed-effect linear and Poisson regressions (incidence rate ratio [IRR] and 95% confidence interval [CI]) were used in the analyses, adjusted for confounders. RESULTS: The mean age was 51.4 (8.7) y, and 55.4% were females. SU means (standard deviation) were 5.4 (1.4) at 1st visit, 5.2 (1.4) at 2nd visit, and 5.1(1.3) mg/dL at 3rd visit. The HU incidence rate was 8.87 per 1000 person-y. Each additional point in adherence to the DASH diet accelerated SU decline (P< 0.01) and lowered the incidence of HU by 4.3% (IRR: 0.957; 95% CI: 0.938,0.977) in adjusted model. CONCLUSION: The present study findings reinforce the importance of encouraging the DASH diet as a healthy dietary pattern to control and reduce the SU concentrations and risk of HU.


Assuntos
Abordagens Dietéticas para Conter a Hipertensão , Hipertensão , Hiperuricemia , Adulto , Feminino , Humanos , Pessoa de Meia-Idade , Masculino , Estudos Longitudinais , Ácido Úrico , Brasil/epidemiologia , Hipertensão/epidemiologia , Dieta
2.
Eur J Neurol ; 31(2): e16139, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38015440

RESUMO

BACKGROUND: Life's Simple 7, a lifestyle and cardiovascular index associated with cognition, has been updated to Life's Essential 8 (LE8) to include sleep. LE8 has been related to cardiovascular outcomes but its association with cognition is unclear. METHODS: In this longitudinal analysis of the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil), LE8 score was based on health behaviors (diet, physical activity, nicotine exposure, and sleep health) as well as health-related factors (body mass index, blood lipids, blood glucose, and blood pressure). Cognition was assessed in three waves, 4 years apart, using the Consortium to Establish a Registry for Alzheimer's Disease - Word List, semantic and phonemic verbal fluency, the Trail-Making Test B (TMT-B), and a global composite score. We used linear mixed-model analysis, inverse probability weighting, and interaction analysis. RESULTS: At baseline, the mean age of the study cohort was 51.4 ± 8.9 years, 56% were women, and 53% were White. Higher baseline LE8 scores were associated with slower decline in global cognition (ß = 0.001, 95% confidence interval [CI] 0.001, 0.002; p < 0.001), memory (ß = 0.001, 95% CI 0.000, 0.002; p = 0.013), verbal fluency (ß = 0.001, 95% CI 0.000, 0.002; p = 0.003), and TMT-B (ß = 0.004, 95% CI 0.003, 0.005; p < 0.001). This association was mainly driven by LE8 health factors, particularly blood glucose and blood pressure. Age, sex, and race were modifiers of the association between LE8 and global cognitive decline (p < 0.001), suggesting it was more pronounced in older, male, and Black participants. CONCLUSIONS: Higher baseline LE8 scores were associated with slower global and domain-specific cognitive decline during 8 years of follow-up, mainly due to health factors such as blood glucose and blood pressure. Sociodemographic factors were modifiers of this association.


Assuntos
Doenças Cardiovasculares , Disfunção Cognitiva , Adulto , Humanos , Masculino , Feminino , Idoso , Pessoa de Meia-Idade , Estudos Longitudinais , Fatores de Risco , Glicemia , Disfunção Cognitiva/epidemiologia , Cognição/fisiologia , Doenças Cardiovasculares/epidemiologia
3.
Am J Bot ; 110(11): e16241, 2023 11.
Artigo em Inglês | MEDLINE | ID: mdl-37672601

RESUMO

PREMISE: Paubrasilia echinata (common names, pau brasil, brazilwood) is the national tree of Brazil and an endangered species endemic to the Brazilian Atlantic Forest. Over its wide distribution of 2000 km, its leaflets morphology exhibits extensive plasticity. Three morphotypes are commonly identified based on leaf size, but it is unclear if they represent distinct taxa or a single polymorphic species. This study aims to clarify the taxonomic position of the three morphotypes to inform conservation decisions. METHODS: A morphometric study of leaf characters of herbarium specimens was coupled with genetic analyses using genotype-by-sequencing data. We used maximum-likelihood and coalescent methods to evaluate the phylogenetic and population structure of the species. We compared these with a morphological dendrogram built from hierarchical clustering. RESULTS: Two of the three morphotypes formed separately evolving lineages, the third morphotype formed two geographically separate lineages, and northern trees with intermediate leaf morphology formed a separate fifth lineage. Leaflet size varied by over 35-fold, and although morphological clustering generally matched the genetic patterns, there were some overlaps, highlighting the cryptic diversity within this group. CONCLUSIONS: Our genetic and morphological results provide some evidence that cultivated trees from different states in Brazil seem to have a limited genetic origin and do not reflect the broader genetic and geographical diversity of the species. As a result, more care is likely needed to preserve the overall genomic diversity of this endangered and iconic species.


Assuntos
Caesalpinia , Filogenia , Caesalpinia/genética , Brasil , Florestas , Geografia
4.
Environ Res ; 225: 115624, 2023 05 15.
Artigo em Inglês | MEDLINE | ID: mdl-36878270

RESUMO

The assessment of risks associated with environmental exposure to metals/metalloids requires well-established reference values for each population since it varies considerably according to distinct local/regional characteristics. However, very few studies establish baseline values for these elements (essential and toxic) in large population groups, especially in Latin American countries. This study was aimed at establishing urinary reference levels of 30 metals/metalloids: aluminum (Al), antimony (Sb), arsenic (As), barium (Ba), beryllium (Be), cadmium (Cd), cerium (Ce), cesium (Cs), chromium (Cr), cobalt (Co), copper (Cu), lanthanum (La), lead (Pb), lithium (Li), strontium (Sr), manganese (Mn), mercury (Hg), molybdenum (Mo), nickel (Ni), platinum (Pt), rubidium (Rb), selenium (Se), silver (Ag), tin (Sn), tellurium (Te), thallium (Tl), thorium (Th), tungsten (W), uranium (U) and zinc (Zn) in a Brazilian southeast adult population. This pilot study is a cross-sectional analysis conducted with the first wave of the ELSA-Brasil cohort (baseline examination). A total of 996 adults (45.5% men, N = 453, mean age: 50.5, and 54.5% women, N = 543, mean age: 50.6) were included in the study. Sample analyses were performed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Percentiles (2.5, 10, 25, 50, 75, 95 (CI95%), and 97.5) of each element (µg/g of creatinine) in the study are presented according to sex. Moreover, differences in the mean metal/metalloid urinary levels according to age, education, smoking, and alcohol intake are also presented. Finally, median found values were compared to established values of large human biomonitoring surveys previously conducted in North America and France. This is the first comprehensive and systematic human biomonitoring study that established population reference ranges for 30 (essential and/or toxic elements) in a Brazilian population group.


Assuntos
Mercúrio , Metaloides , Oligoelementos , Masculino , Adulto , Feminino , Humanos , Pessoa de Meia-Idade , Metaloides/análise , Estudos Longitudinais , Brasil , Estudos Transversais , Projetos Piloto , Metais , Mercúrio/análise , Oligoelementos/análise
5.
Nutr Metab Cardiovasc Dis ; 33(1): 75-83, 2023 01.
Artigo em Inglês | MEDLINE | ID: mdl-36411223

RESUMO

BACKGROUND AND AIMS: Food intake influences uric acid (UA) levels and hyperuricemia (HU), but evidence on the role of ultra-processed foods (UPFs) are scarce. The association between UPFs consumption and (1) HU prevalence and UA levels; (2) HU cumulative incidence; and (3) UA level change over a 4-year period was investigated. METHODS AND RESULTS: Cross-sectional and longitudinal analyses were performed using baseline (2008-2010, aged 35-74 years) and second visit (2012-2014) data from the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). Participants with glomerular filtration rate <60 mL/min/1.73 m2, bariatric surgery, implausible caloric intake, and using urate-lowering therapy (ULT) at baseline were excluded (all analyses). Participants with HU at baseline were excluded from longitudinal analyses. UPFs consumption was assessed using a food frequency questionnaire (FFQ) and categorized by the NOVA classification system (100 g/day). HU was defined as UA≥6.8 mg/dL. Linear, logistic, and mixed-effect linear regressions investigated the associations between UPFs consumption and UA/HU, adjusted for covariates. The final samples included 13,923 (cross-sectional) and 10,517 (longitudinal) individuals. The prevalence of HU was 18.7%, and the cumulative incidence was 4.9%. Greater UPFs consumption was associated with a greater prevalence of HU (OR:1.025 95%CI: 1.006; 1.044) and higher UA levels (ß:0.024 95%CI: 0.016; 0.032). Every additional consumption of 100 g/day of UPFs raised the 4-year cumulative incidence of HU by 5.6% (95%CI: 1.021; 1.092). However, UPFs were not associated with the pace of UA level changes during the study period. CONCLUSION: The present study shows that greater UPFs consumption is associated with another deleterious health consequence: higher UA levels and the risk of having HU.


Assuntos
Hiperuricemia , Ácido Úrico , Adulto , Humanos , Estudos Longitudinais , Hiperuricemia/diagnóstico , Hiperuricemia/epidemiologia , Alimento Processado , Brasil/epidemiologia , Estudos Transversais
6.
Alzheimers Dement ; 19(8): 3528-3536, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-36825689

RESUMO

INTRODUCTION: Common carotid intima-media thickness (cIMT) is a marker of subclinical atherosclerosis and is associated with cognitive decline. Although carotid atherosclerosis is more frequent in White than in Black participants, little is known whether race modifies the association between cIMT and cognitive decline. METHODS: In this longitudinal analysis of the ELSA-Brasil, we assessed cIMT using ultrasound and cognitive performance using different domain tests. We used linear mixed models, interaction analysis, and race stratified analyses. RESULTS: Baseline high IMT values were associated with memory (p < 0.001), verbal fluency (p < 0.001), TMT-B (p < 0.001)), and global cognitive decline (p < 0.001). Race was an effect modifier in the association between IMT and global cognitive decline (0.043), with stronger association in White (p < 0.001) than in Black (p = 0.009) participants. DISCUSSION: Baseline IMT was associated with global and domain-specific cognitive decline and race modified this relationship, with stronger associations in White participants. HIGHLIGHTS: Carotid intima-media thickness (cIMT) was associated with cognitive decline. cIMT and cognitive decline association was stronger in White than in Black participants. We used inverse probability weighting to address attrition bias.


Assuntos
Doenças das Artérias Carótidas , Disfunção Cognitiva , Humanos , Espessura Intima-Media Carotídea , Fatores de Risco , Estudos Longitudinais , Doenças das Artérias Carótidas/diagnóstico por imagem , Doenças das Artérias Carótidas/psicologia , Disfunção Cognitiva/diagnóstico por imagem
7.
Prev Med ; 164: 107316, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-36273617

RESUMO

Solid evidence indicates that body image distortion is associated with various physical and mental health problems in women (e.g. Lee and Lee, 2016; Mölbert et al., 2017; Raj and Ploriya, 2020; Sagar, 2005; Shin et al., 2015). Furthermore, body image has been shown to vary according to life context and stage, particularly after a woman has had children. This scenario justifies the comparison between different countries and cultures. The objective of the present study was to evaluate the prevalence and associated factors of body image distortion/accuracy in Brazilian and Portuguese women with children. The study assessed women selected from two epidemiological cohorts: ELSA-Brasil in Brazil (n = 1468) and Generation XXI in Portugal (n = 3380). The data analyzed were based on multidimensional questionnaires from which sociodemographic and family characteristics as well as data associated with lifestyle and health were obtained. The results show that most women in both cohorts had an accurate perception of their own body size. In cases of distorted self-perception, the likelihood of the Brazilian women perceiving themselves as being heavier was greater if they had had cancer, whereas the Portuguese women were less likely to perceive themselves as heavier when they had less schooling. Perceiving themselves as thinner than they actually are, was associated with poorer self-perception of their own state of health in the Brazilian women and with poorer schooling in both the Brazilian and Portuguese women. The present findings contribute towards improving understanding of the influence of body image distortion on the health and wellbeing of Brazilian and Portuguese women, possibly leading to the implementation of health-promoting policies in both countries.


Assuntos
Imagem Corporal , Etnicidade , Criança , Humanos , Feminino , Brasil/epidemiologia , Portugal , Estilo de Vida , Estudos Longitudinais
8.
Eur J Nutr ; 61(8): 4205-4214, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35895137

RESUMO

PURPOSE: This study evaluated the association between coffee consumption and serum lipid profile in the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). METHODS: This is a cross-sectional study on baseline data from participants of the cohort ELSA-Brasil. Only participants of São Paulo Research Center who underwent a nuclear magnetic resonance (NMR) spectroscopy examination of lipid profile were included (N = 4736). Coffee intake was categorized into four categories (cups/day, in reference cup size of 50 mL, which is the household measure adopted in Brazil): never/almost never, ≤ 1, 1-3, and > 3. Serum lipid profile [i.e., Total Cholesterol (TC), Total Triglycerides (TG), Very Low-Density Lipoprotein-cholesterol (VLDL-c), Low-Density Lipoprotein-cholesterol (LDL-c), High-Density Lipoprotein-cholesterol (HDL-c), Triglyceride-rich Lipoprotein Particles (TRLP) and subfractions particles] was analyzed. To estimate the effect of coffee consumption on serum lipid profile, multivariate Generalized Linear Models were performed. RESULTS: Compared to participants who never or almost never drink coffee, individuals who consumed more than 3 cups/day showed an increase in concentrations of TC (ß: 4.13; 95% CI 0.81, 7.45), TG (ß: 9.53; 95% CI 1.65, 17.42), VLDL-c (ß: 1.90; 95% CI 0.38, 3.42), TRLP (ß: 8.42; 95% CI 1.24, 15.60), and Very Small-TRLP and Medium-TRLP subfractions (ß: 7.36; 95% CI 0.21, 14.51; ß: 2.53; 95% CI 0.89, 4.16, respectively), but not with HDL-c and LDL-c. Among individuals with low (≤ 1 cup/day) and moderate (1-3 cups/day) coffee consumption, no significant associations with lipids was observed. CONCLUSION: High coffee consumption (more than 3 cups per day) was associated with an increase in serum lipids, namely TC, TG, VLDL-c, and TRL particles, highlighting the importance of a moderate consumption of this beverage.


Assuntos
Café , Adulto , Humanos , Brasil , LDL-Colesterol , Estudos Transversais , Estudos Longitudinais , Triglicerídeos , HDL-Colesterol
9.
Acta Psychiatr Scand ; 144(5): 464-474, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34333757

RESUMO

OBJECTIVE: Individuals with bulimia nervosa and binge eating disorder have greater cardiovascular morbidity than the general population. Longitudinal research on the association between binge eating and metabolic syndrome is limited. We tested the longitudinal association between binge eating and metabolic syndrome and its components in a large population sample of Brazilian adults. METHODS: We used data from Brazilian Longitudinal Study of Adult Health (ELSA-Brasil, N = 15,105). To test for the association between binge eating at baseline (2008-2010) and metabolic syndrome at follow-up (2012-2014), we used univariable and multivariable logistic regression models progressively adjusting for potential socio-demographic confounders, number of metabolic syndrome components, and body mass index (BMI) at baseline. RESULTS: In total, 13,388 participants (54.8% female; 52.2% white) had complete data on all variables of interest. Binge eating was associated with increased odds of metabolic syndrome at follow-up (odds ratio (OR):1.66, 95% confidence intervals (CI): 1.44, 1.75). However, the size of this association was attenuated after including number of metabolic syndrome components at baseline (OR:1.19, 95% CI: 1.05, 1.35) and was no longer present after adjusting for baseline BMI (OR:1.09, 95% CI: 0.96, 1.25). Binge eating was also associated with higher odds of hypertension (OR:1.14, 95% CI: 0.99, 1.37) and hypertriglyceridemia (OR:1.21, 95% CI: 1.06, 1.37) at the follow-up assessment after adjustment for all confounders. CONCLUSIONS: Individuals who binge eat are at increased risk of metabolic syndrome via increased BMI, and of hypertriglyceridemia and hypertension independently of BMI. If these are causal associations, effective interventions for binge eating could also have beneficial effects on metabolic health outcomes.


Assuntos
Transtorno da Compulsão Alimentar , Bulimia , Síndrome Metabólica , Adulto , Brasil/epidemiologia , Feminino , Humanos , Estudos Longitudinais , Masculino , Síndrome Metabólica/epidemiologia
10.
Environ Res ; 191: 110208, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-32941838

RESUMO

BACKGROUND: Despite the knowledge about the deleterious effects of air pollutants and their influence on mortality and morbidity due to respiratory and cardiovascular diseases, little is known about the relationship between atmospheric pollutants and neurological diseases. Recently, studies from high-income countries have suggested an association between exposures to air pollutants with cognitive impairment. Thus, we investigated the association of air pollution with cognitive performance in the participants of the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). METHODS: Cognitive function was evaluated using the word list, the verbal fluency, and the trail making tests (TMT). Pollutant exposure was evaluated indirectly using the distance-weighted traffic density (DWTD) of participants' residence and workplace. We investigated the cross-sectional association between DWTD and cognitive test scores using adjusted linear regression models for sociodemographic and clinical variables. RESULTS: 3050 were included (mean age = 52.1 ± 9.2 years old, 56.5% women, and 63.6% white). In the simple linear regression models, participants in the higher tertile of combined DWTD (residence and workplace) presented better cognitive performance in all tests when compared to participants in the lower tertile. The DWTD was not associated with cognitive performance in adjusted linear models especially when adjusted for socioeconomic variables (age, sex, education, and race). We found similar results when we investigated the association of cognitive performance with DTWD near participants' workplace and residence separately. CONCLUSION: Air pollutants were not associated with worse cognitive performance in a large sample of middle-aged and older adults.


Assuntos
Cognição , Disfunção Cognitiva , Idoso , Brasil , Estudos Transversais , Feminino , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade
11.
Conserv Biol ; 33(3): 523-533, 2019 06.
Artigo em Inglês | MEDLINE | ID: mdl-30809858

RESUMO

Herbarium specimens are increasingly recognized as an important resource for conservation science and virtual herbaria are making specimens freely available to a wider range of users than ever before. Few virtual herbaria are designed with conservation use as a primary driver. Exceptionally, Brazil's Reflora Virtual Herbarium (RVH) was created to increase knowledge and conservation of the Brazilian flora. The RVH is closely integrated with the Flora of Brazil 2020 platform on which Brazil's new national Flora is under construction. Both resources are accessible via the Reflora home page and thousands of users move seamlessly between these Reflora resources. To understand how the Reflora resources are currently used and their impact on conservation science, we conducted a literature review and an online survey. We searched for publications of studies in which Reflora resources were used and publications resulting from Brazilian researchers who were part of Reflora's research and mobility program. The survey contained multiple choice questions and questions that required a written response. We targeted Reflora webpage visitors with the survey to capture a wider range of Reflora users than the literature review. Reflora resources were used for a variety of conservation-relevant purposes. Half the 806 scientific publications in which Reflora was cited and 81% of the 1069 survey respondents accessing Reflora resources mentioned conservation-relevant research outputs. Most conservation-relevant uses of the Reflora resources in scientific publications were research rather than implementation focused. The survey of Reflora users showed conservation uses and impacts of virtual herbaria were more numerous and diverse than the uses captured in the literature review. Virtual herbaria are vital resources for conservation science, but they must document use and impacts more comprehensively to ensure sustainability.


Revalorización del Conocimiento sobre Conservación por Medio de Mayor Acceso a la Información Botánica Resumen Los especímenes de los herbarios son reconocidos cada vez más como un recurso importante para la ciencia de la conservación, y, como nunca antes, los herbarios virtuales están poniendo a los especímenes a libre disposición para una gama mucho más amplia de usuarios. Pocos herbarios virtuales están diseñados con el uso para la conservación como conductor primario. Excepcionalmente, se creó el Herbario Virtual Reflora de Brasil (RVH, en inglés) para incrementar el conocimiento y la conservación de la flora brasileña. El RVH está integrado cuidadosamente con la plataforma Flora de Brasil 2020, sobre la cual está bajo construcción la nueva flora nacional de Brasil. Se accede a ambos recursos a través de la página inicial de Reflora y miles de usuarios navegan continuamente entre estos recursos de la página. Para entender cómo se usan actualmente los recursos de Reflora así como su impacto sobre la ciencia de la conservación, realizamos una revisión de la literatura y una encuesta en línea. Buscamos las publicaciones de estudios que usaron los recursos de Reflora y las publicaciones elaboradas por investigadores brasileños que formaron parte del programa de investigación y movilidad de Reflora. La encuesta incluyó preguntas de opción múltiple y preguntas que requerían una respuesta escrita. Enfocamos la encuesta en los visitantes a la página web de Reflora para obtener una gama más amplia de usuarios de Reflora que la que obtendríamos sólo con la revisión de la literatura. Los recursos de Reflora se usaron para una variedad de propósitos relevantes para la conservación. La mitad de las 806 publicaciones científicas en las que se citó a Reflora y el 81% de los 1069 encuestados que acceden a los recursos de Reflora mencionaron resultados de investigación relevantes para la conservación. La mayoría de los usos relevantes para la conservación de los recursos de Reflora en las publicaciones científicas estuvieron más enfocados en la investigación que en la implementación. La encuesta para los usuarios de Reflora mostró que los usos e impactos de los herbarios virtuales fueron más numerosos y diversos que los usos capturados en la revisión de la literatura. Los herbarios virtuales son recursos vitales para la ciencia de la conservación, pero deben documentar su uso y sus impactos exhaustivamente para asegurar su sustentabilidad.


Assuntos
Conservação dos Recursos Naturais , Brasil , Inquéritos e Questionários
12.
BMC Genet ; 19(1): 25, 2018 04 11.
Artigo em Inglês | MEDLINE | ID: mdl-29642872

RESUMO

BACKGROUND: The Leguminosae family is the third-largest family of angiosperms, and Caesalpinioideae is its second-largest subfamily. A great number of species (approximately 205) are found in the Caesalpinia group within this subfamily; together with these species' phenotypic plasticity and the similarities in their morphological descriptors, make this a complex group for taxonomic and phylogenetic studies. The objective of the present work was to evaluate the karyotypic diversity and the 2C DNA content variation in 10 species of the Caesalpinia group, representing six genera: Paubrasilia, Caesalpinia, Cenostigma, Poincianella, Erythrostemon and Libidibia. The GC-rich heterochromatin and 45S rDNA sites (which are used as chromosome markers) were located to evaluate the karyotype diversity in the clade. The variation in the 2C DNA content was determined through flow cytometry. RESULTS: The fluorochrome banding indicated that the chromomycin A3+/4',6-diamidino-2-phenylindole- blocks were exclusively in the terminal regions of the chromosomes, coinciding with 45S rDNA sites in all analyzed species. Physical mapping of the species (through fluorescence in situ hybridization) revealed variation in the size of the hybridization signals and in the number and distribution of the 45S rDNA sites. All hybridization sites were in the terminal regions of the chromosomes. In addition, all species had a hybridization site in the fourth chromosome pair. The 2C DNA content ranged from 1.54 pg in Erythrostemon calycina to 2.82 pg in the Paubrasilia echinata large-leaf variant. The Pa. echinata small-leaf variant was isolated from the other leaf variants through Scoot-Knott clustering. CONCLUSIONS: The chromosome diversity and the variation in the 2C DNA content reinforce that the actual taxonomy and clustering of the analyzed taxa requires more genera that were previously proposed. This fact indicates that taxonomy, phylogeny and cytoevolutionary inference related to the complex Caesalpinia group have to be done through integrative evaluation.


Assuntos
Caesalpinia/genética , DNA Ribossômico/genética , Variação Genética , Cariótipo , Brasil , Mapeamento Cromossômico , Marcadores Genéticos , Genoma de Planta , Hibridização in Situ Fluorescente/métodos , Filogenia
13.
Conserv Biol ; 32(4): 860-871, 2018 08.
Artigo em Inglês | MEDLINE | ID: mdl-29210104

RESUMO

Deforestation is a primary driver of biodiversity change through habitat loss and fragmentation. Stream biodiversity may not respond to deforestation in a simple linear relationship. Rather, threshold responses to extent and timing of deforestation may occur. Identification of critical deforestation thresholds is needed for effective conservation and management. We tested for threshold responses of fish species and functional groups to degree of watershed and riparian zone deforestation and time since impact in 75 streams in the western Brazilian Amazon. We used remote sensing to assess deforestation from 1984 to 2011. Fish assemblages were sampled with seines and dip nets in a standardized manner. Fish species (n = 84) were classified into 20 functional groups based on ecomorphological traits associated with habitat use, feeding, and locomotion. Threshold responses were quantified using threshold indicator taxa analysis. Negative threshold responses to deforestation were common and consistently occurred at very low levels of deforestation (<20%) and soon after impact (<10 years). Sensitive species were functionally unique and associated with complex habitats and structures of allochthonous origin found in forested watersheds. Positive threshold responses of species were less common and generally occurred at >70% deforestation and >10 years after impact. Findings were similar at the community level for both taxonomic and functional analyses. Because most negative threshold responses occurred at low levels of deforestation and soon after impact, even minimal change is expected to negatively affect biodiversity. Delayed positive threshold responses to extreme deforestation by a few species do not offset the loss of sensitive taxa and likely contribute to biotic homogenization.


Assuntos
Conservação dos Recursos Naturais , Rios , Animais , Biodiversidade , Brasil , Ecossistema , Peixes
14.
Conserv Biol ; 32(6): 1380-1391, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30113727

RESUMO

Assessing how much management of agricultural landscapes, in addition to protected areas, can offset biodiversity erosion in the tropics is a central issue for conservation that still requires cross-taxonomic and landscape-scale studies. We measured the effects of Amazonia deforestation and subsequent land-use intensification in 6 agricultural areas (landscape scale), where we sampled plants and 4 animal groups (birds, earthworms, fruit flies, and moths). We assessed land-use intensification with a synthetic index based on landscape metrics (total area and relative percentages of land uses, edge density, mean patch density and diversity, and fractal structures at 5 dates from 1990 to 2007). Species richness decreased consistently as agricultural intensification increased despite slight differences in the responses of sampled groups. Globally, in moderately deforested landscapes species richness was relatively stable, and there was a clear threshold in biodiversity loss midway along the intensification gradient, mainly linked to a drop in forest cover and quality. Our results suggest anthropogenic landscapes with high-quality forest covering >40 % of the surface area may prevent biodiversity loss in Amazonia.


Assuntos
Biodiversidade , Conservação dos Recursos Naturais , Agricultura , Animais , Brasil , Florestas
15.
Public Health Nutr ; 21(12): 2271-2279, 2018 08.
Artigo em Inglês | MEDLINE | ID: mdl-29642958

RESUMO

OBJECTIVE: To verify if the intake of ultra-processed foods is associated with higher BMI and waist circumference (WC) among participants of the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil) cohort. DESIGN: Cross-sectional analysis of the ELSA-Brasil baseline (2008-2010). Dietary information obtained through an FFQ was classified according to characteristics of food processing (NOVA) and used to estimate the percentage energy contribution from ultra-processed foods (i.e. industrial formulations, elaborated from food processing, synthetic constituents and food additives) to individuals' total energy intake. BMI and WC and their respective cut-off points served as response variables. Associations were estimated through linear and multinomial logistic regression models, after adjusting for confounders and total energy intake. SETTING: Six Brazilian capital cities, 2008-2010. SUBJECTS: Active and retired civil servants, aged 35-64 years, from universities and research organizations (n 8977). RESULTS: Ultra-processed foods accounted for 22·7 % of total energy intake. After adjustments, individuals in the fourth quartile of percentage energy contribution from ultra-processed foods presented (ß; 95 % CI) a higher BMI (0·80; CI 0·53, 1·07 kg/m2) and WC (1·71; 1·02, 2·40 cm), and higher chances (OR; 95 % CI) of being overweight (1·31; 1·13, 1·51), obese (1·41; 1·18, 1·69) and having significantly increased WC (1·41; 1·20, 1·66), compared with those in the first quartile. All associations suggest a dose-response gradient. CONCLUSIONS: Results indicate the existence of associations between greater energy contribution from ultra-processed foods and higher BMI and WC, which are independent of total energy intake. These findings corroborate public policies designed to reduce the intake of this type of food.


Assuntos
Dieta/estatística & dados numéricos , Fast Foods , Obesidade/epidemiologia , Adulto , Índice de Massa Corporal , Brasil/epidemiologia , Estudos Transversais , Ingestão de Energia , Comportamento Alimentar , Feminino , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Circunferência da Cintura
16.
Trop Med Int Health ; 21(11): 1452-1457, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27696635

RESUMO

OBJECTIVE: To describe the antiretroviral therapy status of people living with HIV (PLHIV) who died of AIDS-related causes between 2009 and 2013. METHODS: We conducted a cross-sectional, population-based study. Data were obtained by linking the mortality information system and the national ART dispensing database. Trends were modelled using linear regression analysis. RESULTS: A total of 61 425 AIDS-related deaths were registered in Brazil between 2009 and 2013. Median age at death was 41 years (IQR: 33-49), and 65.7% (40 337) of deaths were among men; 47.2% (29 004) of PLHIV who died during the study period had never started treatment, 7.0% (4274) had discontinued it, 15.9% (9775) were on ART for 6 months or less and 29.9% (18 372) were on ART for more than 6 months. Only 1.3% of PLHIV were on third-line ARV regimens when they died. CONCLUSIONS: AIDS-related mortality remains a challenge even in a context of sustained universal access to antiretroviral treatment due to failure of service provision, not to therapy failure. Robust health policies closing gaps in the HIV continuum of care are crucial to further reduce mortality.


Assuntos
Síndrome da Imunodeficiência Adquirida/tratamento farmacológico , Síndrome da Imunodeficiência Adquirida/mortalidade , Terapia Antirretroviral de Alta Atividade , Adulto , Brasil/epidemiologia , Estudos Transversais , Feminino , Humanos , Masculino
17.
Int J Behav Med ; 23(3): 372-382, 2016 06.
Artigo em Inglês | MEDLINE | ID: mdl-26597924

RESUMO

PURPOSE: This study examined gender differences in the association between work-family conflict and self-rated health and evaluated the effect of educational attainment. METHOD: We used baseline data from ELSA-Brasil, a cohort study of civil servants from six Brazilian state capitals. Our samples included 12,017 active workers aged 34-72 years. Work-family conflict was measured by four indicators measuring effects of work on family, effects of family in work and lack of time for leisure and personal care. RESULTS: Women experienced more frequent work-family conflict, but in both genders, increased work-family conflict directly correlated with poorer self-rated health. Women's educational level interacted with three work-family conflict indicators. For time-based effects of work on family, highly educated women had higher odds of suboptimal self-rated health (OR = 1.54; 95 % CI = 1.19-1.99) than less educated women (OR = 1.14; 95 % CI = 0.92-1.42). For strain-based effects of work on family, women with higher and lower education levels had OR = 1.91 (95 % CI 1.48-2.47) and OR = 1.40 (95 % CI 1.12-1.75), respectively. For lack of time for leisure and personal care, women with higher and lower education levels had OR = 2.60 (95 % CI = 1.95-3.47) and OR = 1.11 (95 % CI = 0.90-1.38), respectively. CONCLUSION: Women's education level affects the relationship between work-family conflict and self-rated health. The results may contribute to prevention activities.


Assuntos
Conflito Familiar , Atividades de Lazer , Adulto , Idoso , Brasil , Feminino , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade
18.
Am J Ind Med ; 59(11): 987-1000, 2016 11.
Artigo em Inglês | MEDLINE | ID: mdl-27373788

RESUMO

BACKGROUND: Work-family conflict and time scarcity may affect health. We investigated the association between these issues and migraine, taking into account job strain. METHODS: Baseline data from ELSA-Brasil (6,183 women; 5,664 men) included four indicators of work-family conflict: time- and strain-based interference of work with family (TB-WFC, SB-WFC), interference of family with work (FWC) and lack of time for personal care and leisure (LOT). Migraine was classified according to International Headache Society criteria. RESULTS: Among women, definite migraine was associated with SB-WFC (odds ratio [OR] = 1.28; 95% confidence interval [CI] 1.06-1.55), FWC (OR = 1.32; 1.00-1.75), and LOT (OR = 1.30; 1.08-1.58). Probable migraine was associated with SB-WFC (OR = 1.17; 1.00-1.36). High psychological job demands and low social support interacted with LOT in association with definite migraine. Among men, probable migraine was associated with LOT (OR = 1.34; 1.09-1.64), and there were interactions between job strain and WFC for probable migraine. CONCLUSIONS: Balancing the demands of professional and domestic spheres could be highly relevant in the management of migraines. Am. J. Ind. Med. 59:987-1000, 2016. © 2016 Wiley Periodicals, Inc.


Assuntos
Atividades de Lazer/psicologia , Transtornos de Enxaqueca/psicologia , Doenças Profissionais/psicologia , Estresse Ocupacional/psicologia , Equilíbrio Trabalho-Vida , Adulto , Brasil , Família/psicologia , Feminino , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Autocuidado/psicologia , Apoio Social , Carga de Trabalho/psicologia
19.
Trop Med Int Health ; 20(2): 211-8, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-25345964

RESUMO

OBJECTIVES: To analyse the clinical and epidemiological profiles of dengue haemorrhagic fever (DHF), dengue shock syndrome (DSS) and complicated dengue cases and deaths from 2008 to 2010 that occurred in the state of Minas Gerais, south-eastern Brazil, and to identify factors associated with death from dengue. METHODS: Historical cohort study using data from the Brazilian Information System for Notifiable Diseases. A descriptive analysis of the DHF, DSS and complicated dengue cases and deaths was performed; the incidence, mortality and case-fatality rates were estimated. Logistic regression analysis was used to identify factors associated with death from dengue. Comorbidities were not included in the analysis because the information system does not contain such data. RESULTS: During the study period, 2214 DHF, DSS and complicated dengue cases were reported, including 156 deaths. The annual case-fatality rates for DHF/DSS and complicated dengue cases in the period of 2008-2010 were 7.3%, 4.8% and 7.9%, respectively. The factors associated with death from dengue included residence in a municipality with a population of fewer than 100,000 inhabitants [odds ratio (OR) 2.46; 95% confidence interval (CI) 1.71-3.55], age over 65 years (OR 3.05; 95% CI 1.99-4.68) and plasma leakage (OR 1.69; 95% CI 1.16-2.46). CONCLUSIONS: The results support the importance of plasma leakage as a warning sign associated with death from dengue as well as the signs and symptoms that allow the diagnosis of DHF. Moreover, our findings suggest that increased attention is necessary for individuals over 65 years of age and in municipalities with populations under 100,000 inhabitants to ensure a better quality of care during the management of severe patients of dengue in these locations. Differences in the interpretation of the DHF definition have hindered the comparison of data from different countries; it can improve from the WHO 2009 dengue classification.


Assuntos
Dengue Grave/mortalidade , Adolescente , Adulto , Idoso , Brasil/epidemiologia , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Adulto Jovem
20.
Pharm Biol ; 53(10): 1488-95, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25898223

RESUMO

CONTEXT: Despite several studies on the effects of Solidago chilensis Meyen (Asteraceae), the phytochemical and hypolipidemic properties remain underappreciated. OBJECTIVE: This study evaluates the hypolipidemic and antioxidant effects of hydroalcoholic extract (HE) and quercetrin from S. chilensis aerial parts in cholesterol-fed rats. MATERIALS AND METHODS: The HE was analyzed by high-performance liquid chromatography, followed by quercetrin isolation. Hypercholesterolemic rats (1% cholesterol and 0.5% cholic acid for 15 d) were treated with HE (150, 300, and 600 mg/kg p.o.; n = 6), simvastatin (4 mg/kg p.o.; n = 6), or quercetrin (10 mg/kg p.o.; n = 6) once a day for 30 d. During this period, a high-cholesterol diet was maintained until the 30th day of treatment. RESULTS: Rats treated with HE (150, 300, and 600 mg/kg) and quercetrin showed decreased serum levels of total cholesterol (-19.9, -27.5, -31.0, and -39.4%), lipoprotein-cholesterol (-36.0, -37.5, -43.3, and -59.4%), and triacylglycerides (-15.6, -23.5, -29.8, and -27.2%) when compared with the control group similar to simvastatin. Moreover, treatment with HE and quercetrin decreased hepatic 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase activity (35.1% on average) and increased fecal cholesterol levels (38.2% on average). DISCUSSION AND CONCLUSIONS: Our results suggest that hypolipidemic effects of HE are associated with it modulating the activity of HMG-CoA reductase and its interference in the reabsorption and/or excretion of intestinal lipids. Solidago chilensis and its main constituent, quercetrin, may thus be effective as cholesterol-lowering agents and in preventing atherosclerosis.


Assuntos
Colesterol na Dieta/efeitos adversos , Hipercolesterolemia/tratamento farmacológico , Hipolipemiantes/uso terapêutico , Extratos Vegetais/uso terapêutico , Quercetina/análogos & derivados , Solidago , Animais , Relação Dose-Resposta a Droga , Hipercolesterolemia/sangue , Hipercolesterolemia/induzido quimicamente , Hipolipemiantes/isolamento & purificação , Masculino , Componentes Aéreos da Planta , Extratos Vegetais/isolamento & purificação , Quercetina/isolamento & purificação , Quercetina/uso terapêutico , Ratos , Ratos Wistar , Resultado do Tratamento
SELEÇÃO DE REFERÊNCIAS
Detalhe da pesquisa