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Braz. j. biol ; 82: e230147, 2022. tab, graf
Article in English | LILACS | ID: biblio-1153479


Abstract Metals and agrochemicals are among the main aquatic contaminants, being able to trigger oxidative stress in exposed organisms. The objective of this work was to evaluate the correlation between the level of oxidative stress biomarkers in Aegla crabs (Crustacea, Anomura) with (i) the set of metals present in the streams sediment and (ii) with land uses of three hydrographic basins. The study was carried out in streams (≤ 2nd order) of hydrographic basins in southern Brazil (Basins of Rio Suzana, Rio Ligeirinho-Leãozinho and Rio Dourado). In these streams were quantified the land uses and Cu, Cr, Cd, Fe, Mn and Zn concentrations in the sediment. The enzymes Catalase (CAT) and Glutathione Reductase (GR), as well as the level of membrane lipid peroxidation (TBARS), were analyzed in adult females. The PCA analysis showed that the distribution of metals was different between the basins. Cd, Cr and Fe were correlated positively with CAT and negatively with TBARS and GR. The Dourado basin had the lowest concentrations of these three metals and the highest levels of TBARS. However, in Dourado basin there is predominance of agriculture land use, and TBARS was positively correlated with agricultural land use. Besides in Dourado basin, GR activity was higher than in the others basins, indicating a compensatory response in relation to CAT inhibition. The basins of Suzana and Ligeirinho-Leãozinho rivers had lower TBARS values, which may be due to the induction of CAT in response to metals accumulated in sediment. In summary, this work indicates that in the basins with a higher concentration of toxic metals there is an adaptive response of CAT induction, which reduces TBARS in Aegla. On the other hand, in the basin with lower metallic contamination, TBARS occurrence was primarily influenced by agricultural land use.

Resumo Os metais e agroquímicos estão entre os principais contaminantes aquáticos, podendo desencadear estresse oxidativo em organismos expostos. O objetivo deste trabalho foi avaliar uma possível correlação entre o nível de biomarcadores de estresse oxidativo em Aegla (Crustacea, Anomura) com (i) o conjunto de metais presentes no sedimento e (ii) com os usos da terra, em três bacias hidrográficas distintas. O estudo foi realizado em riachos (≤ 2ª ordem) de bacias hidrográficas do Sul do Brasil (Bacias do Rio Suzana, do Rio Ligeirinho-Leãozinho e do Rio Dourado), as quais foram caracterizadas em função do percentual de usos da terra e do nível de Cu, Cr, Cd, Fe, Mn e Zn no sedimento. As enzimas Catalase (CAT) e Glutationa Redutase (GR), bem como o nível de peroxidação lipídica das membranas (TBARS), foram analisadas em fêmeas adultas. Uma análise de PCA mostrou que a distribuição de metais foi distinta entre as bacias. Cd, Cr e Fe no sedimento correlacionaram positivamente com a CAT e negativamente com TBARS e GR. Entretanto, a bacia do Dourado apresentou os menores níveis destes três metais e os maiores níveis de TBARS, o que pode ser justificado pelo predomínio da agricultura nesta bacia, já que o TBARS correlacionou positivamente com o percentual de uso agrícola. Nesta bacia, a atividade da GR foi mais alta do que nas outras, indicando uma resposta compensatória em relação a inibição da CAT. As bacias do rio Suzana e rio Ligeirinho-Leãozinho apresentaram valores menores de TBARS, o que pode decorrer da indução da CAT em função dos metais acumulados no sedimento. Em síntese, este trabalho indica que nas bacias com maior concentração de metais tóxicos ocorre uma resposta adaptativa de indução da CAT, o que reduz os níveis de TBARS em Aegla. Por outro lado, na bacia com menor contaminação metálica os níveis de TBARS foram primariamente influenciados pelo uso agrícola.

Animals , Female , Water Pollutants, Chemical/analysis , Water Pollutants, Chemical/toxicity , Metals, Heavy/analysis , Anomura , Brazil , Biomarkers/metabolism , Environmental Monitoring , Oxidative Stress , Rivers , Agriculture
Article in English | WPRIM | ID: wpr-878371


Objective@#This study aimed to investigate the effects of @*Methods@#In this study, 0.1% DMG was supplemented in 20% casein diets that were either folate-sufficient (20C) or folate-deficient (20CFD). Blood and liver of rats were subjected to assays of Hcy and its metabolites. Hcy and its related metabolite concentrations were determined using a liquid chromatographic system.@*Results@#Folate deprivation significantly increased pHcy concentration in rats fed 20C diet (from 14.19 ± 0.39 μmol/L to 28.49 ± 0.50 μmol/L; @*Conclusion@#DMG supplementation exhibited hypohomocysteinemic effects under folate-sufficient conditions. By contrast, the combination of folate deficiency and DMG supplementation has deleterious effect on pHcy concentration.

Animals , Biomarkers/metabolism , Chromatography, Liquid , Diet , Dietary Supplements , Folic Acid Deficiency/metabolism , Homocysteine/metabolism , Liver/metabolism , Male , Random Allocation , Rats , Rats, Wistar , Sarcosine/metabolism
Article in English | WPRIM | ID: wpr-880353


BACKGROUND@#Body mass-independent parameters might be more appropriate for assessing cardiometabolic abnormalities than weight-dependent indices in Asians who have relatively high visceral adiposity but low body fat. Dual-energy X-ray absorptiometry (DXA)-measured trunk-to-peripheral fat ratio is one such body mass-independent index. However, there are no reports on relationships between DXA-measured regional fat ratio and cardiometabolic risk factors targeting elderly Asian men.@*METHODS@#We analyzed cross-sectional data of 597 elderly men who participated in the baseline survey of the Fujiwara-kyo Osteoporosis Risk in Men (FORMEN) study, a community-based single-center prospective cohort study conducted in Japan. Whole-body fat and regional fat were measured with a DXA scanner. Trunk-to-appendicular fat ratio (TAR) was calculated as trunk fat divided by appendicular fat (sum of arm and leg fat), and trunk-to-leg fat ratio (TLR) as trunk fat divided by leg fat.@*RESULTS@#Both TAR and TLR in the group of men who used ≥ 1 medication for hypertension, dyslipidemia, or diabetes ("user group"; N = 347) were significantly larger than those who did not use such medication ("non-user group"; N = 250) (P < 0.05). After adjusting for potential confounding factors including whole-body fat, both TAR and TLR were significantly associated with low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, triglyceride, fasting serum insulin, and the insulin resistance index in the non-user group and non-overweight men in the non-user group (N = 199).@*CONCLUSION@#The trunk-to-peripheral fat ratio was associated with cardiometabolic risk factors independently of whole-body fat mass. Parameters of the fat ratio may be useful for assessing cardiometabolic risk factors, particularly in underweight to normal-weight populations.

Absorptiometry, Photon , Adiposity/physiology , Aged , Aged, 80 and over , Biomarkers/metabolism , Cardiometabolic Risk Factors , Cross-Sectional Studies , Humans , Intra-Abdominal Fat/diagnostic imaging , Japan , Male , Osteoporosis/etiology , Prospective Studies , Risk Assessment , Risk Factors , Thorax/diagnostic imaging
Rev. bras. oftalmol ; 80(5): e0038, 2021.
Article in English | LILACS | ID: biblio-1341158


ABSTRACT Age-related macular degeneration is the most important cause of irreversible vision loss in the elderly and has been considered a severe public health problem. Current treatments have only been successful in delaying the loss of central vision. Due to increased life expectancy, governments and researchers have been challenged to seek more efficient and successful treatments for age-related macular degeneration. Considering its relevance for public health and the need of further research, this article aims to address age-related macular degeneration objectively, tackling on the current knowledge about its pathophysiology, potential molecular biomarkers, main prevention procedures and treatments, as well as introducing possible molecules that may be a therapeutic target in this disease.

RESUMO Degeneração macular relacionada à idade é a causa mais importante de perda irreversível da visão em idosos, e é considerada um sério problema de saúde pública. Os tratamentos atuais são bem-sucedidos apenas ao postergar a perda da visão central. Devido à maior expectativa de vida, os governos e pesquisadores têm dificuldade de encontrar tratamentos mais eficientes e exitosos para degeneração macular relacionada à idade. Considerando sua relevância para saúde pública e a necessidade de mais pesquisas, este artigo procura abordar a degeneração macular relacionada à idade de forma objetiva, abordando os conhecimentos atuais sobre sua fisiopatologia, potenciais biomarcadores moleculares, principais procedimentos de prevenção e tratamentos, e apresentar possíveis moléculas que podem ser alvo terapêutico nessa doença.

Humans , Macular Degeneration/physiopathology , Macular Degeneration/metabolism , Macular Degeneration/prevention & control , Macular Degeneration/therapy , Biomarkers/metabolism
Rev. cuba. invest. bioméd ; 39(4): e528, oct.-dic. 2020. graf
Article in Spanish | LILACS, CUMED | ID: biblio-1156460


Introducción: Las enfermedades cardiovasculares constituyen la principal causa de mortalidad y morbilidad a nivel mundial. Reconocidas como problemas de salud de impacto social, han motivado a muchos científicos a tratar de explicar su patogénesis. Actualmente se plantea de la existencia de otros factores de riesgo, independientemente de los clásicos. Entre estos factores se describen el papel de las altas concentraciones de ácido úrico y la actividad de la enzima gamma-glutamiltransferasa en sangre, biomarcadores de estrés oxidativo. Estos elementos que de manera individual pudieran contribuir a las enfermedades cardiovasculares, parecen tener un efecto sinérgico. Objetivo: Revisar las evidencias que sostienen que altas concentraciones de ácido úrico y la actividad de la enzima gamma-glutamiltransferasa en sangre pueden constituir factores de riesgo que desde el estrés oxidativo contribuyan a las enfermedades cardiovasculares. Métodos: Se recopiló la información a partir de las bases de datos de diferentes buscadores (Medline-Pubmed, Cochrane, Scopus y SciELO) entre el 1 de marzo del 2019 y el 23 de mayo 2020. Conclusiones: Se encontró que, tanto el ácido úrico como la gamma-glutamiltransferasa son productos horméticos que a bajas concentraciones tienen efecto antioxidante en el organismo, pero al elevarse involucran la ocurrencia de procesos oxidativos que conducen a la disfunción endotelial y las enfermedades cardiovasculares(AU)

Introduction: Cardiovascular diseases are the leading cause of mortality and morbidity worldwide. Recognized as a health problem of social impact; they have prompted many scientists to try to explain their pathogenesis. New risk factors are currently acknowledged alongside the classic ones. These factors include the role of high uric acid concentrations and the activity of the enzyme gamma-glutamyltransferase in blood, both of which are biomarkers of oxidative stress. These elements may individually contribute to the development of cardiovascular diseases, and seem to have a synergistic effect. Objective: Review the evidence supporting the idea that high uric acid concentrations and the activity of the enzyme gamma-glutamyltransferase in blood may be risk factors contributing to the development of cardiovascular diseases via oxidative stress. Methods: Data were collected from the databases of various search engines (Medline-Pubmed, Cochrane, Scopus and SciELO) from 1 March 2019 to 23 May 2020. Conclusions: It was found that uric acid and gamma-glutamyltransferase are hormetic products causing an antioxidant effect on the organism at low concentrations. However, when concentrations rise, they are involved in the occurrence of oxidative processes leading to endothelial dysfunction and cardiovascular diseases(AU)

Humans , Uric Acid/analysis , Biomarkers/metabolism , Cardiovascular Diseases/complications , Cardiovascular Diseases/etiology , Oxidative Stress/physiology , gamma-Glutamyltransferase/analysis
Rev. bras. ter. intensiva ; 32(4): 585-591, out.-dez. 2020.
Article in English, Portuguese | LILACS | ID: biblio-1156247


RESUMO A sepse é uma infecção sistêmica que acarreta disfunção múltipla dos órgãos. A HSP70 é uma proteína responsiva ao estresse celular, assim como o estresse oxidativo. Esta revisão da literatura buscou investigar a HSP70 e o estresse oxidativo quanto à fisiopatologia da sepse e ao papel da HSP70 como possível alvo terapêutico. A HSP70 exerce efeito protetor quando localizada na célula (iHSP70), e sua diminuição, assim como seu aumento no ambiente extracelular (eHSP70) e o estresse oxidativo, é um biomarcador de gravidade na sepse. Além disso, terapias que aumentam a iHSP70 ou o próprio tratamento com HSP70 promovem a melhora na sepse.

Abstract Sepsis is a systemic infection that causes multiple organ dysfunction. HSP70 is a protein responsive to cell stress, in particular oxidative stress. Therefore, this literature review sought to investigate the roles of HSP70 and oxidative stress in the pathophysiology of sepsis and the possibility of HSP70 as a therapeutic target. HSP70 exerts a protective effect when located in cells (iHSP70), and its decrease, as well as its increase in the extracellular environment (eHSP70), under oxidative stress is a biomarker of sepsis severity. In addition, therapies that increase iHSP70 and treatment with HSP70 promote sepsis improvement.

Humans , Sepsis , HSP70 Heat-Shock Proteins/metabolism , Biomarkers/metabolism , Oxidative Stress
Rev. chil. pediatr ; 91(2): 209-215, abr. 2020. tab
Article in Spanish | LILACS | ID: biblio-1098893


Resumen: Introducción: La inmovilización prolongada asociada a diversas enfermedades neurológicas, causa osteoporosis secundaria con fracturas patológicas y dolor óseo persistente. Objetivos: Establecer la asociación entre densidad mineral ósea (DMO), marcadores de neoformación y reabsorción ósea y grado de capacidad funcional en pacientes menores de 18 años con movilidad reducida. Pacientes y Método: Estudio transversal, realizado entre 1/1/2016 y 31/12/2017 en pacientes de 6 a 18 años diagnosticados de distintas enfermedades neurológicas en Ciudad Real (España). Se analizaron las variables biodemográficas, capacidad funcional según la Functional Mobility Scale (FMS), que valora la movilidad en 5, 50 y 500 metros, DMO, 25-hidroxi-vitamina D, fosfatasa alcalina, osteocalcina en sangre y telopéptido amino terminal de cadena cruzada de colágeno tipo I en orina (NTX-I). Se expresan DMO, fosfatasa alcalina, osteocalcina y NTX-I en Z score según valores de referencia para edad y sexo. Se utilizaron estadísticas descriptivas y correlaciones de Pearson y Spearman. Resulta dos: 36 pacientes (52,7% niñas), edad media de 8,6 ± 4,7 años. Valor medio de FMS: 5,3 sobre 18. DMO media: -1,99 ± 1,7 desviaciones estándar (DE), fosfatasa alcalina media: -2,64 ± 1,08, osteocalcina media: -2,15 ± 1,39, y NTX-I medio: +3 ± 1,72. Hubo asociación significativa entre DMO y FMS para 5 metros (r = 0,395; p = 0,017) y para la puntuación total (r = 0,365; p = 0,029). No se encon traron diferencias significativas según estadios de desarrollo puberal. Conclusiones: En la población estudiada se observa disminución en la DMO y en marcadores de neoformación ósea y elevación de marcadores de reabsorción ósea sin asociación con el desarrollo puberal. Los pacientes con menor grado de movilidad presentan una DMO inferior.

Abstract: Introduction: Prolonged immobilization associated with several neurological disorders causes se condary osteoporosis with pathological fractures and persistent bone pain. Objectives: To establish the association between bone mineral density (BMD), neoformation and bone resorption markers and the degree of functional capacity in children under 18 years of age with reduced mobility. Pa tients and Method: Cross-sectional study conducted in Ciudad Real, Spain between January 1, 2016, and December 31, 2017 with patients aged between 6 and 18 years diagnosed with different neurological disorders. The following variables were analyzed: age, sex, pubertal stage, functional capacity according to the Functional Mobility Scale (FMS), which assesses the ability to walk from 5, 50 to 500 meters, BMD, 25-hydroxy-vitamin D, alkaline phosphatase and osteocalcin in blood, and N-terminal telopeptide crosslinks in collagen type I (NTX-I) in urine. BMD, alkaline phosphatase, osteocalcin, and NTX-I values are expressed in Z score according to reference values for age and sex. The Pear son and Spearman correlations were used for data analysis. Results: 36 patients (52.7% girls) with an average age of 8.6±4.7 years. Mean FMS value: 5.3 out of 18. Mean BMD: -1.99 ± 1.7 standard deviations (SD), mean alkaline phosphatase: -2.64 ± 1.08, mean osteocalcin: -2.15 ± 1.39, and mean NTX-I: +3 ± 1.72. There was a significant association between BMD and FMS for 5 meters (r = 0.395; p = 0.017) and for total score (r = 0.365; p = 0.029). There were no significant differences according to the stages of pubertal development. Conclusions: In this population, there was a decrease in BMD and bone neoformation markers, and an increase of bone resorption markers with no association with pubertal development. Patients with a lower degree of mobility present a lower BMD.

Humans , Male , Female , Child , Adolescent , Osteoporosis/etiology , Biomarkers/metabolism , Bone Density , Bone Remodeling/physiology , Mobility Limitation , Nervous System Diseases/complications , Osteoporosis/diagnosis , Osteoporosis/physiopathology , Osteoporosis/blood , Cross-Sectional Studies , Risk Factors , Disability Evaluation , Nervous System Diseases/physiopathology
Int. braz. j. urol ; 46(2): 244-252, Mar.-Apr. 2020. tab, graf
Article in English | LILACS | ID: biblio-1090589


ABSTRACT Purpose To evaluate the usefulness of natural killer cell activity (NKA) in diagnosing prostate cancer (PC). Materials and Methods The medical records of patients who underwent transrectal prostate biopsy (TRBx) at Korea University Ansan Hospital between May 2017 and December 2017 were retrospectively reviewed. NKA levels were measured using NK Vue® Tubes (ATgen, Sungnam, Korea). All blood samples were obtained at 8 AM on the day of biopsy. Patients with other malignancies, chronic inflammatory conditions, high prostate-specific antigen (PSA) level (>20ng/mL), or history of taking 5-alpha-reductase inhibitor or testosterone replacement therapy were excluded. Results A total of 102 patients who underwent TRBx for PC diagnosis were enrolled. Among them, 50 were diagnosed with PC. Significant differences in age and NKA level were observed between the PC and no-PC groups. Receiver operating characteristic (ROC) curve analysis showed that the optimal cut-off of NKA level for the prediction of PC was 500pg/dL, with a sensitivity of 68.0% and a specificity of 73.1%. In addition, NKA level (0.630) had the greatest area under the ROC curve compared to those for the ratio of total PSA to free PSA (0.597) and PSA density (0.578). Conclusions The results of this pilot study revealed that low NKA and high PSA levels were likely to be associated with a positive TRBx outcome. NKA detection was easy and improved the diagnostic accuracy of PC.

Humans , Male , Aged , Prostatic Neoplasms/diagnosis , Killer Cells, Natural/metabolism , Prostate-Specific Antigen/blood , Prostatic Neoplasms , Prostatic Neoplasms/blood , Killer Cells, Natural/physiology , Biomarkers/metabolism , Biomarkers/blood , Pilot Projects , Retrospective Studies , ROC Curve , Sensitivity and Specificity , Image-Guided Biopsy , Middle Aged
Int. j. morphol ; 38(1): 230-234, Feb. 2020. graf
Article in English | LILACS | ID: biblio-1056427


The hypotheses currently considered the most likely causes of Alzheimer's disease (AD) are amyloid beta peptide deposition in the cerebral cortex and hyperphosphorylation of the Tau protein, with the consequent formation of neurofibrillary tangles. In clinical practice, although not accurate, AD diagnosis is based on the exclusion of other diseases, behavioural assessments and complementary examinations, such as imaging and blood tests. Advances in the field of biotechnology have created exciting prospects for the early detection of AD via biomarker assessment, which is considered a safer and more efficient procedure. Molecules recognised as biomarkers can be expressed in some body fluids, including cerebrospinal fluid, saliva and blood. The presence of amyloid beta peptide and Tau can be confirmed in saliva, which is also an easily and non-invasively collectable material with an accessible cost. The objective was evaluate the concentrations of the t-Tau protein and Ab42 peptide in the saliva of elderly individuals with and without dementia of the AD type Method: The objective of this case-control study, involving a total of 120 individuals, was to analyse whether a correlation exists between variations in the concentrations of the t-Tau and Ab42 biomarkers in the saliva of patients with confirmed AD and individuals in the inclusion group but without AD . We found that t-Tau expression in AD patients is significantly lower than that in individuals without AD, whereas the salivary concentration of Ab42 is higher in patients with AD but not significantly different from that of the group without AD. Conclusion: Thus, we demonstrate the feasibility of using salivary biomarkers as predictive markers for diagnosis of Alzheimer's disease.

Las hipótesis consideradas actualmente como las causas más probables de la enfermedad de Alzheimer (EA) son la deposición de péptido beta amiloide en la corteza cerebral y la hiperfosforilación de la proteína Tau, con la consiguiente formación de ovillos neurofibrilares. En la práctica clínica, aunque no es precisa, el diagnóstico de la EA se basa en la exclusión de otras enfermedades, evaluaciones de comportamiento y exámenes complementarios, como imágenes y análisis de sangre. Los avances en el campo de la biotecnología han creado interesantes perspectivas para la detección temprana de la EA a través de la evaluación de biomarcadores, que se considera un procedimiento más seguro y más eficiente. Las moléculas reconocidas como biomarcadores se pueden expresar en algunos fluidos corporales, incluidos el líquido cerebroespinal, la saliva y la sangre. La presencia del péptido beta amiloide (AB) y la proteína Tau (t-Tau) se puede confirmar en la saliva, que también es un material fácil y no invasivo de recolección con un costo accesible. El objetivo fue evaluar las concentraciones de la proteína t-Tau y el péptido Ab42 en la saliva de las personas de edad avanzada con y sin demencia del tipo de tipo EA. El estudio de casos y controles, se realizó en un total de 120 personas, para analizar si existe una correlación entre las variaciones en las concentraciones de los biomarcadores t-Tau y Ab42 en la saliva de pacientes con EA confirmada e individuos en el grupo de inclusión pero sin AD. Encontramos que la expresión de t-Tau en pacientes con EA es significativamente menor que en individuos sin EA, mientras que la concentración salival de Ab42 es mayor en pacientes con EA pero no significativamente diferente de la del grupo sin la enfermedad . Por lo tanto, se demuestra la viabilidad del uso de biomarcadores salivales como marcadores predictivos para el diagnóstico de la enfermedad de Alzheimer.

Humans , Male , Female , Middle Aged , Aged , Amyloid beta-Peptides/metabolism , tau Proteins/metabolism , Alzheimer Disease/metabolism , Alzheimer Disease/pathology , Saliva/metabolism , Saliva/chemistry , Biomarkers/analysis , Biomarkers/metabolism , Amyloid beta-Peptides/analysis , tau Proteins/analysis
Rev Assoc Med Bras (1992) ; 66(5): 600-606, 2020. tab, graf
Article in English | SES-SP, LILACS, SES-SP | ID: biblio-1136263


SUMMARY OBJECTIVE Lower physical fitness and poor motor performance were shown to be linked with higher levels of oxidative stress in children and adolescents with intellectual disabilities. Therefore, a moderate aerobic exercise for 12-weeks was performed to evaluate the effects of physical activity scores on motor functions, oxidative stress, and intelligence quotients (IQ) in school children with intellectual disability. METHODS A total of 65 school children aged (12-18 Yrs) were randomly included in this study. Intellectual disability (ID),motor skills,physical fitness(VO2max), total energy expenditure (TEE), MDA, 8-OHdG, TAC, NO, and total oxidative stress(OS)were assessed using pre-validated WISC-IQ score test, BOT-2 test, PA questionnaire, and immunoassay techniques respectively. RESULTS WISC-IQ and BOT-2 set scores of intellectual and motor skills performance showed a significant correlation with physical activity status and the regulation of oxidative stress-free radicals in school children with mild and moderate ID following 12 weeks of moderate exercise. The intellectual and motor skills performance of the participants correlated positively with the increase in TAC activity and physical fitness scores and negatively with MDA, 8-OHdG, NO, and Total-OS, respectively. Stepwise multiple regression analysis of the demographic, physical status and oxidative stress parameters explained around78.0 to 93.4 % of intellectual disability variation among schoolchildren. CONCLUSION Moderate aerobic training for12 weeks has a positive impact on improving intellectual ability of schoolchildren with ID via modulating redox status, improves physical fitness, and motor skills proficiency.

RESUMO OBJETIVO A baixa aptidão física e o baixo desempenho motor mostraram-se associados a níveis mais altos de estresse oxidativo em crianças e adolescentes com deficiência intelectual. Portanto, foi realizado um exercício aeróbico moderado por 12 semanas para avaliar os efeitos dos escores de atividade física nas funções motoras, estresse oxidativo e quocientes de inteligência (QI) em escolares com deficiência intelectual. MÉTODOS Um total de 65 crianças em idade escolar (12 a 18 anos) foi incluído aleatoriamente neste estudo. A incapacidade intelectual (DI), habilidades motoras, aptidão física (VO2máx), gasto energético total (ETE), MDA, 8-OHdG, TAC, NO e estresse oxidativo total (SG) foram avaliados pelo teste de pontuação Wisc-IQ pré-validado, teste BOT-2, questionário de PA e técnicas de imunoensaio, respectivamente. RESULTADOS Os escores do conjunto Wisc-IQ e BOT-2 do desempenho das habilidades intelectuais e motoras mostraram uma correlação significativa com o status da atividade física e a regulação dos radicais livres do estresse oxidativo em escolares com DI leve e moderada após 12 semanas de exercício moderado. O desempenho das habilidades intelectuais e motoras dos participantes correlacionou-se positivamente com o aumento dos escores de atividade TAC e aptidão física e negativamente com MDA, 8-OHdG, NO e Total-OS, respectivamente. Houve uma melhora significativa nas habilidades motoras, como áreas específicas de precisão motora fina, velocidade de corrida, agilidade, coordenação de membros superiores, força, coordenação bilateral e equilíbrio entre crianças em idade escolar após o programa de exercícios. A análise de regressão múltipla passo a passo dos parâmetros demográficos, do estado físico e do estresse oxidativo explicou em torno de 78,0 a 93,4% da variação da incapacidade intelectual entre os escolares. CONCLUSÃO O treinamento aeróbico moderado por 12 semanas tem um impacto positivo na melhoria da capacidade intelectual de escolares com DI por meio da modulação do status redox, melhora da aptidão física e proficiência em habilidades motoras.

Humans , Child , Adolescent , Physical Fitness , Intellectual Disability , Oxidation-Reduction , Biomarkers/metabolism , Exercise , Oxidative Stress/physiology
Rev. Col. Bras. Cir ; 47: e20202394, 2020. tab, graf
Article in Portuguese | LILACS | ID: biblio-1136585


RESUMO Objetivo: avaliar as diferenças no perfil metabonômico de pacientes que atingiram remissão de diabetes mellitus tipo 2 (DM2) após cirurgia bariátrica em relação aos que apresentaram manutenção ou recidiva dessa condição após a cirurgia. Métodos: Participaram do estudo 33 pacientes obesos diabéticos tipo 2, dos quais 22 tiveram remissão completa da DM2 e 11 tiveram recidiva da DM2 ou não apresentaram remissão da doença no pós-operatório. Amostras de sangue foram coletadas para avaliação dos perfis metabonômicos séricos através de um estudo metabonômico baseado em RMN de 1H. Resultados: o modelo metabonômico para avaliação da recidiva da diabetes apresentou uma acurácia de 93,9%, sensibilidade de 81,8%, especificidade de 100%, valor preditivo positivo (VPP) igual a 100% e valor preditivo negativo (VPN) igual a 91,7%. Conclusão: a cirurgia bariátrica promove efeitos específicos na distribuição dos metabólitos de pacientes que atingiram remissão de DM2, e essa nova distribuição pode ser avaliada através de um modelo metabonômico.

ABSTRACT Purpose: To evaluate the differences in the metabonomic profile of patients who achieved remisison of Type 2 diabetes mellitus (T2DM) after bariatric surgery in relation to those who presented maintenance or recurrence of this condition after surgery. Methods: Thirthy-three patients with obesity and T2D were submitted to bariatric/metabolic surgery, among which, 22 experienced complete remission of T2D, and 11 did not experience remission in the postoperative period. Blood samples were taken in order to assess the serum profiles through a 1H NMR-based metabonomic study. Results: The metabonomic model for the assessment of T2D recurrence presented an accuracy of 93.9%, sensibility of 81.8%, specificity of 100%, positive predictive value of 100% and a negative predictive value of 91.7%. Conclusion: bariatric surgery provide specific effects on the distribution of metabolites in those patients who achieved remission of T2DM, and this new distribution can be assessed through a metabonomic model.

Humans , Male , Female , Obesity, Morbid/surgery , Diabetes Mellitus, Type 2/diagnosis , Diabetes Mellitus, Type 2/metabolism , Bariatric Surgery , Time Factors , Blood Glucose/metabolism , Obesity, Morbid/metabolism , Remission Induction , Biomarkers/metabolism , Weight Loss , Cross-Sectional Studies , Predictive Value of Tests , Sensitivity and Specificity , Treatment Outcome , Middle Aged
Medwave ; 20(5): e7928, 2020.
Article in English, Spanish | LILACS | ID: biblio-1116906


La insuficiencia renal aguda es el síndrome caracterizado por una disminución brusca, sostenida y potencialmente reversible de la velocidad de filtración glomerular y de las funciones tubulares, afectando de forma global la función renal. Comprende una serie de eventos que se inician con la presencia de factores de riesgo que conducen hacia las fases de progresión de la insuficiencia renal aguda (estrés, lesión e insuficiencia renal), que culmina con la necesidad de terapias de reemplazo renal o muerte. Actualmente, el uso de biomarcadores que diferencien entre un daño funcional temprano o daño estructural de inicio tardío del riñón, le permite al médico realizar un diagnóstico y manejo oportuno antes de que se establezcan las fases previas a la insuficiencia renal, mejorando así la sobrevida de estos pacientes. Esta revisión busca integrar evidencia científica disponible que describe las fases previas de la insuficiencia renal aguda, revisando sus posibles causas, clasificaciones y métodos actuales de diagnóstico, junto con las principales recomendaciones vigentes para su manejo.

Acute kidney injury is a syndrome characterized by a sudden, sustained, and potentially reversible decrease in glomerular filtration rate and tubular function, which globally impacts renal function. It comprises of a series of events starting with the presence of risk factors, then evolving towards acute kidney injury progression, characterized by stress, injury, and renal failure, culminating with either the use of renal replacement therapy or death. Currently, the use of biomarkers that differentiate between the initial functional deterioration and late-onset structural damage of the kidney enables the clinician to perform an early diagnosis and indicate treatment before the stages of acute kidney injury progression are established, thus increasing survival rates.

Humans , Biomarkers/metabolism , Renal Replacement Therapy , Acute Kidney Injury/diagnosis , Survival Rate , Disease Progression , Early Diagnosis , Acute Kidney Injury/physiopathology , Acute Kidney Injury/therapy
Braz. j. med. biol. res ; 53(5): e9162, 2020. tab, graf
Article in English | LILACS | ID: biblio-1098111


In this study, we aimed to explore the relationship among miR-22, deep cerebral microbleeds (CMBs), and post-stroke depression (PSD) 1 month after ischemic stroke. We consecutively recruited 257 patients with first-ever and recurrent acute cerebral infarction and performed PSD diagnosis in accordance with the Diagnostic and Statistical Manual IV criteria for depression. Clinical information, assessments of stroke severity, and imaging data were recorded on admission. We further detected plasma miR-22 using quantitative PCR and analyzed the relationship among miR-22, clinical data, and PSD using SPSS 23.0 software. Logistic regression showed that deep (OR=1.845, 95%CI: 1.006-3.386, P=0.047) and brain stem CMBs (OR=2.652, 95%CI: 1.110-6.921, P=0.040), as well as plasma miR-22 levels (OR=2.094, 95%CI: 1.066-4.115, P=0.032) were independent risk factors for PSD. In addition, there were significant differences in baseline National Institutes of Health Stroke Scale scores (OR=1.881, 95%CI: 1.180-3.011, P=0.007) and Widowhood scores (OR=1.903, 95%CI: 1.182-3.063, P=0.012). Analysis of the receiver operating curve (AUC=0.723, 95%CI: 0.562-0.883, P=0.016) revealed that miR-22 could predict PSD one month after ischemic stroke. Furthermore, plasma miR-22 levels in brainstem and deep CMBs patients showed an upward trend (P=0.028) relative to the others. Patients with acute ischemic stroke, having brainstem and deep cerebral microbleeds, or a higher plasma miR-22 were more likely to develop PSD. These findings indicate that miR-22 might be involved in cerebral microvascular impairment and post-stroke depression.

Humans , Male , Female , Middle Aged , Aged , Cerebral Hemorrhage/psychology , Brain Infarction/psychology , MicroRNAs/metabolism , Depression/psychology , Brief Psychiatric Rating Scale , Recurrence , Socioeconomic Factors , Severity of Illness Index , Brain Stem/blood supply , Magnetic Resonance Imaging , Biomarkers/metabolism , Cerebral Hemorrhage/metabolism , Acute Disease , Risk Factors , Depression/metabolism
Clinics ; 75: e1912, 2020. graf
Article in English | LILACS | ID: biblio-1133358


The world is currently facing a serious SARS-CoV-2 infection pandemic. </mac_aq>This virus is a new isolate of coronavirus, and the current infection crisis has surpassed the SARS and MERS epidemics</mac_aq> that occurred in 2002 and 2013, respectively. SARS-CoV-2 has currently infected more than 142,000 people, causing </mac_aq>5,000 deaths and spreading across more than 130 </mac_aq>countries worldwide. The spreading capacity of the virus clearly demonstrates the potential threat </mac_aq>of respiratory viruses to human health, thereby reiterating to the governments around the world that preventive </mac_aq>health policies and scientific research are pivotal to overcoming the crisis. Coronavirus disease (COVID-19) causes flu-like symptoms in most cases. However, approximately 15% of the patients need hospitalization, and 5% require assisted ventilation, depending on the cohorts studied. What is intriguing, however, is the higher susceptibility of the elderly, especially individuals who are older than 60 years of age, and have comorbidities, including hypertension, diabetes, and heart disease. In fact, the death rate in this group may be up to 10-12%. Interestingly, children are somehow less susceptible and are not considered as a risk group. Therefore, in this review, we discuss some possible molecular and cellular mechanisms by virtue of which the elderly subjects may be more susceptible to severe COVID-19. Toward this, we raise two main </mac_aq>points, i) increased ACE-2 expression in pulmonary and heart tissues in users of chronic angiotensin 1 </mac_aq>receptor (AT1R) blockers; and ii) antibody-dependent enhancement (ADE) after previous exposure to other circulating coronaviruses. We believe that these points are pivotal for a better understanding of the pathogenesis of severe COVID-19, and must be carefully addressed by physicians and scientists in the field.

Humans , Aged , Pneumonia, Viral/enzymology , Coronavirus Infections/enzymology , Peptidyl-Dipeptidase A/metabolism , Antibody-Dependent Enhancement , Betacoronavirus , Antibody Formation/immunology , Pneumonia, Viral/immunology , Pneumonia, Viral/metabolism , Biomarkers/metabolism , Up-Regulation , Coronavirus Infections/immunology , Coronavirus Infections/metabolism , Peptidyl-Dipeptidase A/immunology , Pandemics , Angiotensin-Converting Enzyme 2 , SARS-CoV-2 , COVID-19
J. bras. pneumol ; 46(5): e20180353, 2020. tab, graf
Article in English | LILACS | ID: biblio-1134901


ABSTRACT Objective: To determine the relationships that smoking history has with inflammatory markers, metabolic markers, body composition, muscle strength, and cardiopulmonary capacity in current smokers. Methods: This was a cross-sectional study involving 65 smokers (age range: 18-60 years). On three non-consecutive days, each participant was evaluated in terms of smoking history, pre-existing comorbidities, lung function (by spirometry), peripheral muscle strength (by dynamometry), body composition (by bioelectrical impedance analysis), levels of metabolic/inflammatory markers, and maximum cardiopulmonary capacity (by treadmill exercise test). We evaluated the relationships that smoking history has with inflammatory markers, metabolic markers, body composition, muscle strength, and cardiopulmonary capacity, using logarithmic transformation of the data and calculating Pearson's correlation coefficient and for partial correlations adjusted for age, gender, body mass index (BMI), and comorbidities. To identify the influence of smoking history on pre-existing comorbidities, we used a logistic regression model adjusted for age, BMI, and duration of smoking. Results: Smoking history correlated significantly, albeit weakly, with triglyceride level (r = 0.317; p = 0.005), monocyte count (r = 0.308; p = 0.013), and waist circumference (r = 0.299; p = 0.017). However, those correlations did not retain their significance in the adjusted analysis. In the logistic regression model, smoking more than 20 cigarettes/day correlated significantly with the presence of metabolic diseases (OR = 0.31; 95% CI: 1.009-1.701; p = 0.043). Conclusions: In this sample of smokers, smoking history correlated positively with the triglyceride level, the monocyte count, and waist circumference. The prevalence of metabolic disease was highest in those who smoked more than 20 cigarettes/day.

RESUMO Objetivo: Verificar a relação da carga tabágica com marcadores inflamatórios, marcadores metabólicos, composição corporal, força muscular e capacidade cardiorrespiratória em tabagistas. Métodos: Estudo transversal com 65 tabagistas de ambos os sexos (idade: 18-60 anos). Todos os participantes foram avaliados em três dias não consecutivos quanto ao histórico de tabagismo, comorbidades pré-existentes, função pulmonar (espirometria), força muscular periférica (dinamometria), composição corporal (bioimpedância), dosagem de marcadores metabólicos e inflamatórios e teste cardiopulmonar em esteira para avaliar a capacidade cardiorrespiratória máxima. Avaliou-se a relação da carga tabágica com marcadores inflamatórios, marcadores metabólicos, composição corporal, força muscular e capacidade cardiorrespiratória com transformação logarítmica através da correlação de Pearson e correlações parciais ajustadas para idade, sexo, índice de massa corpórea (IMC) e comorbidades. A regressão logística com modelo ajustado para idade, IMC e tempo de tabagismo foi utilizada para identificar a influência do histórico de tabagismo sobre as comorbidades pré-existentes. Resultados: Observaram-se correlações positivas fracas somente para dados não ajustados da carga tabágica com nível de triacilglicerol (r = 0,317; p = 0,005), contagem de monócitos (r = 0,308; p = 0,013) e circunferência abdominal (r = 0,299; p = 0,017). No modelo de regressão logística, fumar mais de 20 cigarros/dia correlacionou-se significativamente com a presença de doenças metabólicas (OR = 0,31; IC95%: 1,009-1,701; p = 0,043). Conclusões: Nesta amostra de tabagistas, a carga tabágica se correlacionou positivamente com nível de triacilglicerol, contagem de monócitos e circunferência abdominal. A prevalência de doenças metabólicas foi maior em tabagistas que fumam mais de 20 cigarros/dia.

Humans , Male , Female , Adult , Middle Aged , Body Composition/drug effects , Biomarkers/metabolism , Smoking/adverse effects , Muscle Strength/drug effects , Smokers , Inflammation/metabolism , Triglycerides/blood , Monocytes/metabolism , Biomarkers/analysis , Smoking/metabolism , Body Mass Index , Cross-Sectional Studies , Waist Circumference , Cardiorespiratory Fitness
J. bras. nefrol ; 41(4): 550-559, Out.-Dec. 2019. graf
Article in English | LILACS | ID: biblio-1056604


Abstract Fluid volume and hemodynamic management in hemodialysis patients is an essential component of dialysis adequacy. Restoring salt and water homeostasis in hemodialysis patients has been a permanent quest by nephrologists summarized by the 'dry weight' probing approach. Although this clinical approach has been associated with benefits on cardiovascular outcome, it is now challenged by recent studies showing that intensity or aggressiveness to remove fluid during intermittent dialysis is associated with cardiovascular stress and potential organ damage. A more precise approach is required to improve cardiovascular outcome in this high-risk population. Fluid status assessment and monitoring rely on four components: clinical assessment, non-invasive instrumental tools (e.g., US, bioimpedance, blood volume monitoring), cardiac biomarkers (e.g. natriuretic peptides), and algorithm and sodium modeling to estimate mass transfer. Optimal management of fluid and sodium imbalance in dialysis patients consist in adjusting salt and fluid removal by dialysis (ultrafiltration, dialysate sodium) and by restricting salt intake and fluid gain between dialysis sessions. Modern technology using biosensors and feedback control tools embarked on dialysis machine, with sophisticated analytics will provide direct handling of sodium and water in a more precise and personalized way. It is envisaged in the near future that these tools will support physician decision making with high potential of improving cardiovascular outcome.

Resumo O volume de fluidos e o controle hemodinâmico em pacientes em hemodiálise é um componente essencial da adequação da diálise. A restauração da homeostase do sal e da água em pacientes em hemodiálise tem sido uma busca constante por parte dos nefrologistas, no que condiz à abordagem do "peso seco. Embora essa abordagem clínica tenha sido associada a benefícios no desfecho cardiovascular, recentemente tem sido questionada por estudos que mostram que a intensidade ou agressividade para remover fluidos durante a diálise intermitente está associada a estresse cardiovascular e dano potencial a órgãos.para remover fluidos durante a diálise intermitente está associada a estresse cardiovascular e dano potencial a órgãos. Uma abordagem mais precisa é necessária para melhorar o desfecho cardiovascular nessa população de alto risco. A avaliação e monitorização do estado hídrico baseiam-se em quatro componentes: avaliação clínica, ferramentas instrumentais não invasivas (por exemplo, US, bioimpedância, monitorização do volume sanguíneo), biomarcadores cardíacos (e.g. peptídeos natriuréticos), algoritmos e modelagem de sódio para estimar a transferência de massa. O manejo otimizado do desequilíbrio hídrico e de sódio em pacientes dialíticos consiste em ajustar a remoção de sal e líquido por diálise (ultrafiltração, dialisato de sódio), e restringir a ingestão de sal e o ganho de líquido entre as sessões de diálise. Tecnologia moderna que utiliza biosensores e ferramentas de controle de feedback, hoje parte da máquina de diálise, com análises sofisticadas, proporcionam o manejo direto sobre o sódio e a água de uma maneira mais precisa e personalizada. Prevê-se no futuro próximo que essas ferramentas poderão auxiliar na tomada de decisão do médico, com alto potencial para melhorar o resultado cardiovascular.

Humans , Sodium/metabolism , Renal Dialysis/adverse effects , Hemodynamics/physiology , Homeostasis/physiology , Kidney Failure, Chronic/therapy , Water-Electrolyte Balance/physiology , Blood Pressure/physiology , Algorithms , Biomarkers/metabolism , Dialysis Solutions/chemistry , Cardiovascular System/physiopathology , Renal Dialysis/standards , Treatment Outcome , Cardiovascular Deconditioning , Nephrologists/statistics & numerical data , Kidney Failure, Chronic/physiopathology
J. bras. nefrol ; 41(4): 472-480, Out.-Dec. 2019. tab, graf
Article in English | LILACS | ID: biblio-1056605


Abstract Introduction: Anemic patients with chronic kidney disease (CKD) can be divided into anemic patients without or with functional iron deficiency (FID). The increase in the number of cases of hemosiderosis in patients on hemodialysis (HD) attributed to excessive intravenous iron replacement has called for the investigation of the factors involved in the genesis of FID. Objectives: This study aimed to describe the prevalence of FID in patients with CKD on HD, characterize the included individuals in terms of clinical and workup parameters, and assess their nutritional, oxidative stress, and inflammation statuses. This cross-sectional study assembled a convenience sample of 183 patients with CKD on HD treated in Southern Brazil. Patients meeting the inclusion and exclusion criteria were divided into two groups, one with anemic subjects with FID and one with anemic patients without FID. Participants answered a questionnaire probing into socio-epidemiological factors, underwent anthropometric measurements, and were tested for markers of anemia, oxidative stress, inflammation, and nutrition. Statistical analysis: The date sets were treated on software package GraphPad InStat version 3.1. Variables were tested with the Kolmogorov-Smirnov, chi-square, Student's t, and Mann-Whitney tests. Statistical significance was attributed to differences with a p < 0.05. Results: Markers of inflammation were not statistically different between the two groups. Markers of anemia and nutrition were significantly lower in patients with FID. Patients with FID were prescribed higher doses of parenteral iron (p < 0,05). Discussion: FID was associated with lower nutritional marker levels, but not to increased levels of markers of inflammation or oxidative stress, as reported in the literature. Additional studies on the subject are needed.

Resumo Introdução: A anemia na DRC pode ser dividida em anemia sem deficiência funcional de ferro e com deficiência funcional de ferro (ADFF). Diante do aumento dos casos de hemossiderose em pacientes em hemodiálise, atribuídos à reposição excessiva de ferro endovenoso, maiores conhecimentos sobre os fatores envolvidos na gênese da ADFF são importantes. Objetivos: documentar a prevalência de ADFF em renais crônicos em hemodiálise. Caracterizar clínica e laboratorialmente os portadores de ADFF em HD e avaliar o estado nutricional, estresse oxidativo e inflamatório. Estudo transversal, amostra de conveniência, envolvendo 183 renais crônicos em hemodiálise no sul do Brasil. Após aplicação dos critérios de exclusão, os pacientes foram separados em dois grupos: portadores de anemia com e sem deficiência funcional de ferro. Foram submetidos a questionário socioepidemiológico, à análise antropométrica e análise laboratorial dos marcadores de anemia, estresse oxidativo, inflamatórios e nutricionais. Análise estatística: programa GraphPad InStat versão 3.1. Foram aplicados os testes: Kolmogorov-Smirnov, qui-quadrado, t de Student e Mann-Whitney. Nível de significância adotado de 5%. Resultados: não houve diferença significativa nos marcadores inflamatórios entre os dois grupos. Houve diferença significativa nos marcadores de anemia e nutrição, significativamente menores nos pacientes com ADFF. Pacientes com ADFF receberam doses mais elevadas de ferro parenteral (p < 0,05). Discussão: ADFF esteve associada a menores valores de marcadores nutricionais, mas não esteve associada a marcadores inflamatórios ou de estresse oxidativo aumentados, como relatado na literatura. Estudos adicionais sobre o tema são necessários.

Humans , Male , Female , Adult , Middle Aged , Biomarkers/metabolism , Renal Dialysis/adverse effects , Anemia, Iron-Deficiency/etiology , Renal Insufficiency, Chronic/complications , Inflammation/metabolism , Anemia/etiology , Brazil/epidemiology , Nutrition Assessment , Prevalence , Cross-Sectional Studies , Oxidative Stress/physiology , Anemia, Iron-Deficiency/epidemiology , Administration, Intravenous , Hemosiderosis/epidemiology , Anemia/epidemiology , Iron/administration & dosage , Iron/adverse effects , Nitric Oxide/metabolism
Rev. Paul. Pediatr. (Ed. Port., Online) ; 37(4): 414-418, Oct.-Dec. 2019. tab
Article in English | LILACS | ID: biblio-1041355


ABSTRACT Objective: To evaluate the association of body mass index (BMI) and albumin with pulmonary function in cystic fibrosis (CF) pediatric subjects. Methods: This is a cross-sectional study with clinically stable CF's subjects. Clinical (pulmonary function) and nutritional evaluation (body mass index and albumin) were performed. Univariate analysis was performed using simple linear correlations. Regression analysis was performed using an exit level of p<0.05. Results: Seventy-eight CF's subjects (mean age 12.8±3.8 years) with mean albumin 4.2±0.4 mg/dL, predicted forced expiratory volume in 1 second (FEV1%) 80.8±22.6 and BMI median percentile 51.2 (1.3-97.7). In the multiple regression models, albumin, age and BMI percentile were associated with pulmonary function. Subjects with lower than 25 BMI percentile had 12.2% lower FEV1%. An albumin increase of 0.1 mg was associated with 2.7% increase in predicted FEV1%, and one year increase in age was associated with reduction in 1.2% of predicted FEV1%. Conclusions: BMI percentile, albumin and age were independently associated with predicted FEV1% in a tertiary referral hospital.

RESUMO Objetivo: Avaliar a associação do Índice de Massa Corporal (IMC) e da albumina com a função pulmonar em pacientes pediátricos com fibrose cística (FC). Métodos: Estudo transversal com pacientes pediátricos com FC clinicamente estáveis. Foram realizadas avaliação clínica (função pulmonar) e nutricional (IMC e albumina). Análise univariada foi realizada usando correlação linear simples. Análise de regressão foi realizada usando o nível de significância de p<0,05. Resultados: Foram incluídos 78 pacientes com FC (média de idade 12,8±3,8 anos) com média de albumina de 4,2±0,4 mg/dL, volume expiratório forçado em um segundo (VEF1%) predito de 80,8±22,6 e mediana do percentual de IMC de 51,2 (1,3-97,7). No modelo de regressão múltipla, albumina, idade e percentual de IMC apresentaram associação com a função pulmonar. Indivíduos com IMC abaixo de 25% apresentaram VEF1% predito 12,2% menor. Um aumento de 0,1 mg de albumina teve associação com aumento de 2,7% no VEF1% predito, e um ano a mais de idade mostrou relação com a redução de 1,2% de VEF1% predito. Conclusão: O percentual de IMC, albumina e idade apresentaram associação independente com o VEF1% predito em um hospital terciário de referência.

Humans , Male , Female , Child, Preschool , Child , Adolescent , Body Mass Index , Cystic Fibrosis/physiopathology , Albumins/metabolism , Lung/physiopathology , Biomarkers/metabolism , Linear Models , Forced Expiratory Volume , Cross-Sectional Studies , Cystic Fibrosis/metabolism
Arq. bras. cardiol ; 113(6): 1121-1127, Dec. 2019. tab
Article in English | LILACS | ID: biblio-1055071


Abstract Background: Oxidative stress and inflammation are present in coronary artery disease (CAD) and are linked to the activation of the transcription nuclear factor kappa B (NF-κB). To attenuate these complications, transcription factors like nuclear factor erythroid 2-related factor 2 (Nrf2) and peroxisome proliferator-activated receptor-β/δ (PPARβ/δ) can be activated to inhibit NF-κB. However, the available data on expression of NF-κB, Nrf2 and PPARβ/δ in CAD patients are limited. Objective: To evaluate the expression of the transcription factors NF-κB and Nrf2 and PPAR��/�� in CAD patients. Methods: Thirty-five patients (17 men, mean age 62.4 ? 7.55 years) with CAD and twelve patients (5 men, mean age 63.50 ? 11.46 years) without CAD were enrolled. Peripheral blood mononuclear cells (PBMCs) were isolated and processed for mRNA expression of Nrf2, NF-κB, NADPH: quinone oxidoreductase 1 (NQO1) and PPARβ/δ mRNAs using quantitative real-time polymerase chain reaction (qPCR). p < 0.05 was considered statistically significant. Results: There was no difference in the mRNA expressions of Nrf2 (1.35 ? 0.57), NF-κB (1.08 ? 0.50) or in the antioxidant enzyme NQO1 (1.05 ? 0.88) in the CAD group compared to the group without CAD (1.16 ? 0.76, 0.95 ? 0.33, 0.81 ? 0.55, respectively). However, PPARβ/δ was highest expressed in the CAD group (1.17 ? 0.86 vs. 0.56 ? 0.34, p = 0.008). Conclusion: The main finding of this study was the PPARβ/δ being more expressed in the PBMC of patients with CAD compared to the control group, whereas no differences were observed in Nrf2 or NF-κB mRNA expressions.

Resumo Fundamentos: O estresse oxidativo e a inflamação estão presentes na doença arterial coronariana (DAC) e estão ligados à ativação do fator de transcrição nuclear kappa B (NF-κB). Para atenuar essas complicações, fatores de transcrição como o fator nuclear eritroide 2-relacionado ao fator 2 (Nrf2) e o receptor ativado por proliferador de peroxissoma β/δ (PPARβ/δ) podem ser ativados para inibir o NF-κB. No entanto, os dados disponíveis sobre a expressão de NF-κB, Nrf2 e PPARβ/δ em pacientes com DAC são limitados. Objetivo: Avaliar a expressão dos fatores transcricionais NF-κB e Nrf2 e o PPARβ/δ em pacientes com DAC. Métodos: Trinta e cinco pacientes (17 homens, idade média de 62,4 ± 7,55 anos) com DAC e doze pacientes (5 homens, com idade média de 63,50 ± 11,46 anos) sem DAC foram incluídos. Células mononucleares do sangue periférico (PBMCs) foram isoladas e processadas para a expressão de mRNA do Nrf2, NF-κB, NADPH: quinona oxidoredutase 1 (NQO1) e mRNAs do PPARβ/δ por meio de reação em cadeia da polimerase quantitativa em tempo real (qPCR). Valores de p < 0,05 foram considerados como estatisticamente significativos. Resultados: Não houve diferença nas expressões de mRNA do Nrf2 (1,35 ± 0,57), NF-κB (1,08 ± 0,50) ou na enzima antioxidante NQO1 (1,05 ± 0,88) no grupo DAC em comparação com o grupo sem DAC (1,16 ± 0,76, 0,95 ± 0,33, 0,81 ± 0,55, respectivamente). Entretanto, o PPARβ/δ apresentou maior expressão no grupo com DAC (1,17 ± 0,86 vs. 0,56 ± 0,34, p = 0,008). Conclusão: O principal achado do presente estudo foi o PPARβ/δ apresentar maior expressão nas PBMCs de pacientes com DAC comparados ao grupo controle, ao passo que não foram observadas diferenças nas expressões de mRNA do Nrf2 ou NF-κB.

Humans , Male , Female , Middle Aged , Aged , Coronary Artery Disease/metabolism , RNA, Messenger/metabolism , NF-kappa B/metabolism , PPAR-beta/metabolism , PPAR delta/metabolism , NF-E2-Related Factor 2/metabolism , Biomarkers/metabolism , Body Mass Index , Gene Expression Regulation , Polymerase Chain Reaction , Oxidative Stress , Inflammation/metabolism
Trends psychiatry psychother. (Impr.) ; 41(3): 237-246, July-Sept. 2019. tab
Article in English | LILACS | ID: biblio-1043526


Abstract Objective To assess the association between brain-derived neurotrophic factor (BDNF) levels and acute stress disorder (ASD) in patients who have suffered physical trauma. Methods Data were collected at an emergency hospital in Porto Alegre, state of Rio Grande do Sul, southern Brazil. Participants were over 18 years of age, victims of physical trauma, and had been hospitalized for a minimum of 48 hours. A total of 117 hospitalized patients who agreed to participate in the research were grouped according to the shift in which blood was collected (38 subjects from the morning shift and 79 from the afternoon shift), had their BDNF levels measured and responded to other questionnaires. Respondents were further grouped by age into three ranges: 18-30, 31-50 and 51-70 years. Results We found a significant difference in the distribution of BDNF between the two shifts in which blood samples were collected, with the afternoon group having higher BDNF levels (U = 1906.5, p = 0.018). A difference was observed only between the 18-30 group and the 51-70 group in the afternoon shift (Umorning = 1107, pmorning = 0.575; Uafternoon = 7175, pafternoon = 0.028). Conclusions The population whose blood samples were collected in the afternoon showed significantly higher values of BDNF compared to those of the morning shift. This same population presented lower BDNF levels when associated with ASD subtypes A1, A2, and A. We hypothesize that the lower values of BDNF measured in the morning shift were due to a response to the circadian cycle of cortisol, whose action inhibits the expression of serum neurotrophins.

Resumo Objetivo Verificar a associação entre os níveis de fator neurotrófico derivado do cérebro (brain-derived neurotrophic factor [BDNF]) e transtorno de estresse agudo (TEA) em pacientes que sofreram trauma físico. Métodos Os dados foram coletados em um hospital de emergência de Porto Alegre, Rio Grande do Sul, Brasil. Os participantes eram maiores de 18 anos, vítimas de trauma físico e estavam hospitalizados por um período mínimo de 48 horas. Um total de 117 pacientes hospitalizados que concordaram em participar da pesquisa foram agrupados de acordo com o turno de realização da coleta de sangue (38 sujeitos no turno da manhã e 79 sujeitos no turno da tarde), tiveram seus níveis de BDNF medidos e responderam a outros questionários. Os entrevistados também foram agrupados por idade em três faixas etárias: 18-30, 31-50 e 51-70 anos. Resultados Encontramos uma diferença significativa na distribuição de BDNF entre os turnos, sendo que o grupo da tarde apresentou níveis maiores de BDNF (U = 1906,5, p = 0,018). Houve diferença entre o grupo de 18-30 anos e o de 51-70 anos no turno da tarde (Umanhã = 1107, pmanhã = 0,575; Utarde = 7175, ptarde = 0,028). Conclusões A população cuja coleta ocorreu à tarde apresentou valores significativamente maiores de BDNF em relação à coleta do turno da manhã. Esta mesma população apresentou menores níveis dessa neurotrofina quando associada com os subtipos A1, A2 e A de TEA. É possível hipotetizar que os menores valores de BDNF aferidos na coleta do turno da manhã se devam a uma resposta ao ciclo circadiano do cortisol, cuja ação inibe a expressão de neurotrofinas séricas.

Humans , Male , Female , Adolescent , Adult , Aged , Young Adult , Wounds and Injuries/psychology , Brain-Derived Neurotrophic Factor/metabolism , Brazil , Hydrocortisone/metabolism , Biomarkers/metabolism , Surveys and Questionnaires , Circadian Rhythm , Stress Disorders, Traumatic, Acute/blood , Emergency Service, Hospital , Emergency Treatment/methods , Hospitalization , Middle Aged