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1.
J. bras. nefrol ; 41(4): 550-559, Out.-Dec. 2019. graf
Artigo em Inglês | LILACS | ID: biblio-1056604

RESUMO

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.


Assuntos
Humanos , Sódio/metabolismo , Diálise Renal/efeitos adversos , Hemodinâmica/fisiologia , Homeostase/fisiologia , Falência Renal Crônica/terapia , Equilíbrio Hidroeletrolítico/fisiologia , Pressão Sanguínea/fisiologia , Algoritmos , Biomarcadores/metabolismo , Soluções para Diálise/química , Sistema Cardiovascular/fisiopatologia , Diálise Renal/normas , Resultado do Tratamento , Descondicionamento Cardiovascular , Nefrologistas/estatística & dados numéricos , Falência Renal Crônica/fisiopatologia
2.
Prensa méd. argent ; 105(8): 469-476, sept 2019. tab
Artigo em Inglês | LILACS, BINACIS | ID: biblio-1023268

RESUMO

In rats with experimentally formed arterial hypertension, lipid perxidation in the plasma, amplification of blood chotting mechanisms with a decrease in anticoagulation and fibrinolysis was noted. Regular forced jogging provided the experimental rats with a positive dynamic of all the indicators considered. Thus, with increased muscular activity, the level of acyl hydro-peroxides of plasma decreased in rats with arterial hypertension formed due to the enhancement of its antioxidant activity. In addition, with the increase in muscle activity in experimental rats, normalization of clotting factor activity, indices of general coagulation tests, antithrobin III activity and protein C was achieved. This was accompanied by a normalization of the level of plasminogen, a2-antiplasmin and spontaneous euglobulin lysis time. In rats with formed arterial hipertension with stgandard physical activity, the initial violations of the measured parameters were completely preserved (AU)


Assuntos
Ratos , Coagulação Sanguínea , Experimentação Animal , Hemostasia , Homeostase/fisiologia , Hipertensão , Atividade Motora
3.
Arch. argent. pediatr ; 117(3): 143-148, jun. 2019. ilus, tab
Artigo em Inglês, Espanhol | LILACS, BINACIS | ID: biblio-1001185

RESUMO

Objetivo. Evaluar un novedoso marcador del estrés oxidativo (la homeostasis de tiol /disulfuro) en la sepsis pediátrica y determinar sus efectos sobre el pronóstico de esta afección. Métodos. En el estudio, se incluyeron pacientes con diagnóstico de sepsis y controles sanos. Se midieron las concentraciones de tiol total, tiol nativo, disulfuro, disulfuro /tiol total, disulfuro /tiol nativo y tiol nativo/tiol total en los grupos con sepsis y de referencia. Se compararon los parámetros entre los supervivientes y los no supervivientes del grupo con sepsis. Se midieron las concentraciones de hemoglobina, leucocitos, trombocitos, lactato y proteína C-reactiva en los pacientes con sepsis al momento del diagnóstico. Se utilizaron el puntaje de riesgo de mortalidad pediátrico (Pediatric Risk of Mortality, PRISM) y el puntaje de disfunción orgánica (Pediatric Logistic Organ Dysfunction, PELOD) para estimar la gravedad de la enfermedad. Resultados. En el grupo con sepsis se incluyó a 38 pacientes y en el de referencia, a 40 niños sanos. Las concentraciones plasmáticas de tiol en los pacientes con sepsis fueron significativamente inferiores que las del grupo de referencia (p < 0,001). Conclusión. La homeostasis de tiol/disulfuro fue anormal en los niños con sepsis en la unidad de cuidados intensivos pediátricos.


The aim of this study is to evaluate a novel oxidative stress marker (thiol-disulphide homeostasis) in paediatric sepsis and to determine their effects on the prognosis of sepsis. Patients diagnosed with sepsis (n= 38) and healthy controls (n= 40) were incorporated in the study. Total thiol, native thiol, disulphide, disulphide/total thiol, disulphide/native thiol, and native thiol /total thiol levels were measured in the sepsis and control groups. Additionally, the parameters were compared between survivors and non-survivors in the sepsis group. The levels of hemoglobin, white blood cell, platelet, lactate, and C-reactive protein were measured in patients with sepsis at diagnosis. The paediatric risk of mortality and paediatric logistic organ dysfunction scores of the patients were used to estimate the disease severity. The plasma thiol levels of the patients with sepsis were significantly lower than the control group (p < 0.001). This study showed that thiol/disulphide homeostasis is abnormal in children with sepsis in Paediatric Intensive Care Unit.


Assuntos
Humanos , Recém-Nascido , Lactente , Pré-Escolar , Criança , Adolescente , Compostos de Sulfidrila , Sepse , Estresse Oxidativo , Dissulfetos , Homeostase
4.
Acta cir. bras ; 34(5): e201900506, 2019. tab
Artigo em Inglês | LILACS | ID: biblio-1010876

RESUMO

Abstract Purpose: To evaluate the serum variations of Interleukins (Il) and CPR of abdominoplasties in post-bariatric patients and, to equate the homeostasis (HOMA) from the variations of glycemia and insulin to evolute the metabolic modifications. Methods: Fourteen women were submitted to abdominoplasties with weight loss after a gastroplasty. Levels of IL4, IL6, IL10, CRP, glycemia and insulin were obtained during the pre-operative, trans-operative, 24 hours post, 7th and 14th postoperative days. Results: The IL4 was higher at 24 hours post-surgery, and after a moderate decrease, it remained high until the 14th day. The IL6 and CRP had an expressive increase during the trans-operative period. The CRP remained high, and the IL6 decreased on the 7th and 14th days. The IL10 increased during the transoperative period, and it posteriorly decreased to lower levels in comparison to the pre-operative period. The already increased glycemia during the pre-operative period was even higher during the trans-operative and then, returned to preliminary values on the 7th and 14th days after surgery. The HOMA accompanied the insulin. Conclusion: The inflammatory and glycemic serum levels decrease after abdominiplasty in obese post-bariatric patients.


Assuntos
Humanos , Feminino , Adulto , Pessoa de Meia-Idade , Adulto Jovem , Glicemia/análise , Proteína C-Reativa/análise , Interleucinas/sangue , Cirurgia Bariátrica/métodos , Abdominoplastia/métodos , Insulina/sangue , Período Pós-Operatório , Valores de Referência , Fatores de Tempo , Estudos Prospectivos , Período Pré-Operatório , Homeostase
5.
Int. arch. otorhinolaryngol. (Impr.) ; 23(2): 229-240, 2019. tab, ilus
Artigo em Inglês | LILACS | ID: biblio-1015598

RESUMO

Introduction: The importance ofmucociliary clearance (MCC) for the respiratory system homeostasis is clear. Therefore, evaluating this defense mechanism is fundamental in scientific research and in the clinical practice of pulmonology and of associated areas. However, MCC evaluation has not been so usual due to the complexity ofmethods that use radiolabeled particles. Nevertheless, as an interesting alternative, there is the saccharin transit time (STT) test. This method is reproducible, simple to perform, noninvasive, does notdemand high costs, and has been widely used in studies of nasalMCC. Although the STT test is widely used, there is still lack of a detailed description of its realization. Objective: The present literature review aims to provide basic information related to the STT test andto present the findings of the previous studies that usedthismethod, discussing variations in its execution, possible influences on the obtained results and limitations of the method, as well as to relate our experience with the use of STT in researches. Data Synthesis: There are several factors that can alter the results obtained from STT tests, which would raise difficulties with proper interpretation and with the discussion of the results among different studies. Conclusions: Saccharin transit time is awidely usedmethod for the evaluation of nasal MCC, and therefore, the standardization related to the previous and concurrent to test orientations, and also its execution, become essential to improve its accuracy, and allow comparisons among different studies (AU)


Assuntos
Humanos , Sacarina/farmacologia , Depuração Mucociliar , Fenômenos Fisiológicos Respiratórios , Reprodutibilidade dos Testes , Fatores de Risco , Técnicas de Diagnóstico do Sistema Respiratório , Homeostase , Mucosa Nasal/fisiologia
7.
Rev. bras. ter. intensiva ; 30(3): 286-293, jul.-set. 2018. tab
Artigo em Português | LILACS | ID: biblio-977969

RESUMO

RESUMO Objetivo: Verificar a incidência da hiperglicemia de estresse em crianças em condição grave e investigar a etiologia da hiperglicemia com base em um modelo de avaliação da homeostasia. Métodos: Estudo prospectivo de coorte, conduzido em uma unidade de terapia intensiva pediátrica da Cairo University, que incluiu 60 crianças com doença grave e 21 controles saudáveis. Utilizaram-se os níveis séricos de glicose, insulina e peptídeo C, avaliados em até 24 horas após a admissão. O modelo de avaliação da homeostasia foi utilizado para analisar a função das células beta e a sensibilidade à insulina. Resultados: A hiperglicemia foi estimada em 70% dos pacientes. Valores de glicemia ≥ 180mg/dL se associaram com desfechos piores. Os níveis de glicemia se correlacionaram de forma positiva com o Pediatric Risk for Mortality (PRISM III) e o número de órgãos com disfunção (p = 0,019 e p = 0,022, respectivamente), enquanto os níveis de insulina se correlacionaram de forma negativa com o número de órgãos com disfunção (r = -0,33; p = 0,01). O modelo de avaliação da homeostasia revelou que 26 (43,3%) das crianças em condições graves tinham baixa função de células beta e 18 (30%) baixa sensibilidade à insulina. Detectou-se patologia combinada em apenas dois (3,3%) pacientes. Baixa função de células beta se associou de forma significante com a presença de disfunção de múltiplos órgãos, disfunção respiratória, cardiovascular e hematológica, e presença de sepse. Conclusões: A disfunção de células beta pareceu ser prevalente em nossa coorte e se associou com disfunção de múltiplos órgãos.


ABSTRACT Objective: This study aimed to study the incidence of stress hyperglycemia in critically ill children and to investigate the etiological basis of the hyperglycemia based on homeostasis model assessment. Methods: This was a prospective cohort study in one of the pediatric intensive care units of Cairo University, including 60 critically ill children and 21 healthy controls. Serum blood glucose, insulin, and C-peptide levels were measured within 24 hours of admission. Homeostasis model assessment was used to assess β-cell function and insulin sensitivity. Results: Hyperglycemia was estimated in 70% of patients. Blood glucose values ≥ 180mg/dL were associated with a poor outcome. Blood glucose levels were positively correlated with Pediatric Risk for Mortality (PRISM III) score and number of organ dysfunctions (p = 0.019 and p = 0.022, respectively), while insulin levels were negatively correlated with number of organ dysfunctions (r = −0.33, p = 0.01). Homeostasis model assessment revealed that 26 (43.3%) of the critically ill patients had low β-cell function, and 18 (30%) had low insulin sensitivity. Combined pathology was detected in 2 (3.3%) patients only. Low β-cell function was significantly associated with the presence of multi-organ dysfunction; respiratory, cardiovascular, and hematological dysfunctions; and the presence of sepsis. Conclusions: β-Cell dysfunction appeared to be prevalent in our cohort and was associated with multi-organ dysfunction.


Assuntos
Humanos , Masculino , Feminino , Lactente , Pré-Escolar , Criança , Estresse Fisiológico/fisiologia , Sepse/complicações , Hiperglicemia/etiologia , Insuficiência de Múltiplos Órgãos/fisiopatologia , Glicemia/metabolismo , Peptídeo C/sangue , Unidades de Terapia Intensiva Pediátrica , Estudos de Casos e Controles , Incidência , Estudos Prospectivos , Estudos de Coortes , Estado Terminal , Sepse/epidemiologia , Egito , Células Secretoras de Insulina/patologia , Homeostase , Hiperglicemia/epidemiologia , Insulina/sangue , Insuficiência de Múltiplos Órgãos/epidemiologia
8.
São Paulo; s.n; s.n; 2018. 88 p. graf, tab, ilus.
Tese em Português | LILACS | ID: biblio-969401

RESUMO

A resistência dos tecidos à ação da insulina é uma das principais complicações do excesso de peso. O aumento da gordura corporal, decorrente do consumo excessivo de nutrientes, é acompanhado por um quadro de inflamação crônica de baixa intensidade que está relacionado com a fisiopatologia da resistência à insulina. O magnésio (Mg) é um mineral envolvido com diversos processos fisiológicos e bioquímicos, especialmente aqueles relacionados ao metabolismo energético e ao controle glicêmico. Apesar de a deficiência deste mineral estar relacionada com condições pré-diabéticas, não está claro se a inadequação dietética promove alterações na sensibilidade à insulina e/ou se condições de resistência à insulina causam distúrbios na homeostase de Mg. O objetivo deste trabalho foi investigar os efeitos da restrição dietética de Mg e sua associação com o excesso de lipídios sobre a homeostase do mineral e a sensibilidade à insulina. Ratos Wistar, machos, com peso entre 97-123 g, permaneceram em gaiolas individuais por 24 semanas. Os animais receberam rações normolipídicas (CON, 7% de lipídios) ou hiperlipídicas (HL, 32% de lipídios), adequadas (CON e HL Mg; 500 mg de Mg/kg de ração; n = 6 para cada grupo) ou com restrição de Mg (Mg[50] e HL Mg[50]; 50 mg de Mg/kg de ração; n = 6 para cada grupo). O consumo da dieta HL promoveu maior acúmulo de tecido adiposo e maior ganho de peso corporal (p < 0,05). Os animais que consumiram rações com restrição de Mg apresentaram hipomagnesemia (p<0,01), menor excreção urinária (p < 0,01) e fecal (p < 0,001) de Mg e menor concentração óssea desse mineral (p < 0,001). No entanto, não foram observadas alterações no Mg muscular (p > 0,05). O grupo HL Mg[50] apresentou maior concentração de Mg no eritrócito quando comparado aos outros grupos. A restrição dietética de Mg, isoladamente, não promoveu alterações na sensibilidade à insulina (avaliada pelo teste de tolerância à insulina). Quando associada à dieta hiperlipídica, resultou em aumento da glicemia de jejum e em redução da sensibilidade à insulina, após 16 semanas (p < 0,01). Em nível molecular, a fosforilação da proteína quinase B (Akt) no músculo e no fígado foi significantemente menor no grupo HL Mg[50] (p < 0,05). A restrição dietética de Mg induziu ao aumento do conteúdo proteico dos canais TRPM6 e TRPM7 no rim, independentemente da sensibilidade à insulina. Os resultados deste estudo apontam que a deficiência de Mg tende a agravar as repercussões metabólicas do consumo de dietas hiperlipídicas na sensibilidade à insulina e que a resistência à insulina altera a compartimentalização do Mg


Insulin resistance is one of the main complications of overweight. Increase body fat, due to excessive consumption of nutrients is accompanied by a chronic low-grade inflammation related to insulin resistance pathophysiology. Magnesium (Mg) is a mineral involved in many physiological and biochemical processes, especially those related to energy metabolism and glycemic control. Although Mg deficiency is related to pre-diabetic conditions, it is unclear whether dietary inadequacy promotes changes in insulin sensitivity and/or if conditions of insulin resistance cause disturbances in Mg homeostasis. This work aimed to investigate the effects of dietary Mg restriction and its association with high-fat diet on mineral homeostasis and insulin sensitivity. Male Wistar rat (97-123 g) remained in individual cages for 24 weeks. Animals received normolipid diet (CON, 7% lipid) or high-fat diet (HF, 32% lipid), adequate (CON and HF, 500 mg Mg / kg diet, n = 6 for each group) or Mg restricted (Mg[50] and HF Mg[50], 50 mg of Mg / kg of diet, n = 6 for each group). High-fat diet promoted a greater adipose tissue excess and body weight gain (p<0.05). Animals with Mg restricted diet had hypomagnesemia (p<0.01), lower Mg urinary (p<0.01) and faecal loss (p<0.001) and lower bone Mg concentration (p<0.001). However, no changes were observed in muscle Mg (p>0.05). HF Mg[50] group presented higher concentration of erythrocyte Mg when compared to the other groups. Singly, dietary Mg restriction did not induce changes in insulin sensitivity (as assessed by the insulin tolerance test). When associated with high-fat diet, dietary Mg restriction resulted in higher fasting glycemia and lower insulin sensitivity after 16 weeks (p<0.01). At the molecular level, protein kinase B (Akt) phosphorylation in muscle and liver was significantly lower in HFMg [50] group (p<0.05). Dietary Mg restriction induced increased protein content of renal TRPM6 and TRPM7 channels, regardless of insulin sensitivity. The results of this study indicate that Mg deficiency worsens metabolic effects of high-fat diet on insulin sensitivity. In addition, insulin resistance changes Mg compartmentalization


Assuntos
Animais , Masculino , Ratos , Dieta Hiperlipídica/efeitos adversos , Homeostase , Deficiência de Magnésio/complicações , Resistência à Insulina , Obesidade/complicações
9.
Rev. salud bosque ; 8(1): 130-143, 2018. Tab, Ilus
Artigo em Espanhol | LILACS, COLNAL | ID: biblio-1104037

RESUMO

En la homeostasis de un individuo sano se desarrollan coágulos para prevenir la pérdida de sangre, pero las fallas del equilibrio hemostático pueden ocasionar obstrucción aguda de una arteria como fenómeno fisiopatológico principal, que puede beneficiarse del tratamiento trombolítico que consiste en la administración, por vía endovenosa o en ocasiones intraarterial, de medicamentos capaces de destruir los coágulos de fibrina y permitir que se restaure el flujo sanguíneo en el vaso sanguíneo. Esto se hace para evitar complicaciones como infarto cerebral, embolia pulmonar, trombosis venosa profunda e infarto agudo del miocardio.El siguiente documento es una revisión bibliográfica de la terapia fibrinolitica y su uso en estas entidades, teniendo en cuenta las recomendaciones de la Agency for Healthcare Research and Quality (AHRQ), usando PubMed como base datos de búsqueda principal. Se obtuvieron artículos sobre trombólisis en infarto agudo del miocardio, trombembolismo pulmonar y accidente cerebrovascular y según la pertinencia se procedió a su análisis para generar una recomendación


Homeostasis in healthy individuals develop clots to prevent blood loss, but failures can cause hemostatic imbalance, acute obstruction of artery as main underlying process which may benefit from thrombolytic therapy consisting of the intravenous or intraarterial administration of drugs capable of destroying fibrin clots and allow it to restore blood flow through the blood vessel. The following document provides a bibliographic review about fibrinolytic therapy and the use in these entities. Taking into account the agency's recommendations for "healthcare research and quality" (AHRQ), using PubMed as the primary search database. We obtained papers compatible with thrombolysis in acute myocardial infarction, pulmonary thrombembolism and cerebrovascular accident and according to the pertinence we proceeded to be analyzed to generate a recommendation.


Na homeostase de um indivíduo sadio são desenvolvidos coágulos para prevenir a perda de sangue, porém as falhas de equilíbrio homeostático podem ocasionar obstrução aguda de uma artéria como fenômeno trombolítico que consiste na administração por via endovenosa ou intra-arterial, de medicamentos que destroem coágulos de fibrina e permitem que seja restaurado o fluxo sanguíneo a traves do vaso sanguíneo. O presente documento é uma revisão bibliográfica a respeito da terapia fibrinolítica e seu uso nestas entidades, considerando as recomendações da agencia Healthcare research and quality (AHRQ), usando PubMed como base de dados de busca principal. Foram obtidos artigos compatíveis com trombolisis em infarto agudo do miocárdio, tromboembolismo pulmonar e acidente cerebrovascular e segundo a pertinência, foi analisado para gerar uma recomendação


Assuntos
Terapia Trombolítica , Terapêutica , Acidente Vascular Cerebral , Homeostase , Infarto do Miocárdio
11.
São Paulo; s.n; 2018. 81 p.
Tese em Português | LILACS | ID: biblio-947265

RESUMO

Introdução: Especula-se que exista uma possível relação entre a ingestão de vitamina K e a diminuição da gordura corporal. Além disso, embora os resultados permaneçam controversos, há um número crescente de estudos que apoiam um papel chave dessa vitamina na melhora do perfil lipídico, da sensibilidade à insulina e na redução do risco de diabetes mellitus tipo 2, contudo pouco se sabe sobre quais mecanismos estariam envolvidos. Objetivo: Investigar as relações entre a ingestão de vitamina K (na forma de filoquinona - PK), gordura corporal, perfil lipídico e marcadores da homeostase da glicose em adultos e idosos. Métodos: Estudo transversal com 298 indivíduos de ambos os sexos, participantes do inquérito ISA - Capital 2015. Amostras de sangue foram coletadas para determinação do perfil lipídico, glicemia de jejum e concentrações de insulina; e índice de estimativa de resistência à insulina (HOMAIR), índice de estimativa da função de células β-pancreáticas (HOMA-β) e índice de estimativa da sensibilidade à insulina (QUICKI) foram calculados. A ingestão de vitamina K foi avaliada por meio de um recordatório alimentar de 24hrs (repetido em 75% da amostra), e a investigação quantitativa da massa gorda foi conduzida por meio da absorciometria de feixe duplo (DXA). Indivíduos com ingestão de vitamina K inferior aos valores de AI foram divididos em subgrupos de acordo com o estado nutricional e faixa etária. Foi realizada a Correlação de Spearman em grupos estratificados de acordo com o Índice de Massa Corporal (IMC) e com o Índice de Gordura Corporal (IGC). Para avaliar as associações entre a ingestão de vitamina K e cada uma das medidas bioquímicas e de adiposidade, foi realizada a regressão linear múltipla. Resultados: Dentre os avaliados, 46% eram do sexo masculino (n=136), com idade mediana de 61 anos (20 - 94 anos), e 56,4% apresentavam sobrepeso ou obesidade (n=168). A mediana de ingestão de vitamina K foi de 102,7 μg, ou 59,9 μg,/1000 kcal, sem diferença de acordo com sexo ou idade. A ingestão de vitamina K apresentou correlação negativa com o HOMA-IR (r = -0,603; p = 0,0134) e correlação positiva com QUICKI (r = 0,603; p = 0,0134) entre os adultos eutróficos do sexo masculino (n = 16). Em idosas com baixo peso (n = 12), a ingestão de vitamina K foi negativamente correlacionada com o Colesterol Total (CT) (r = -0,644; p = 0,0443). Entre as mulheres com elevado IGC e ingestão de vitamina K inferior aos valores de AI (n = 117), foram observadas correlações negativas entre a ingestão de vitamina K e HOMA-IR (r = -0,187; p = 0,0451) e correlações positivas com QUICKI (r = 0,187; p = 0,0451). Conclusões: Os resultados encontrados sugerem uma possível relação entre a ingestão dietética de filoquinona, gordura corporal, perfil lipídico e marcadores da homeostase da glicose, em amostra de adultos e idosos


Introduction: Recent research have investigated a possible inverse relationship between vitamin K intake and body fat. In addition, although the results remain controversial, there is an increasing number of studies supporting a key role of this vitamin in improving lipid profile, insulin sensitivity and reducing the risk of type 2 diabetes mellitus, but little is known about what mechanisms would be involved. Objective: To investigate the relationship between vitamin K intake (in the form of phylloquinone - PK), body fat, lipid profile and markers of glucose homeostasis in adults and elderly. Methods: Cross-sectional study with 298 individuals of both sexes, participants in the ISA - Capital 2015 survey. Blood samples were collected for determination of lipid profile, fasting glycemia and insulin concentrations, and homeostasis model assesment estimate for insulin resistance (HOMA-IR), homeostasis model assessment estimate for β-cell function (HOMA-β) and the quantitative insulin sensitivity check index (QUICKI) were calculate accordingly. Vitamin K intake was assessed by a 24-hour dietary recall (repeated in 75% of the sample) and quantitative investigation of fat mass was conducted using dual-energy x-ray absorptiometry (DXA). Subjects with vitamin K intake lower than AI values were divided into subgroups according to nutritional status and age group. Spearman correlation was performed in stratified groups according to Body Mass Index (BMI) and Fat Mass Index (FMI). To evaluate the associations between vitamin K intake and each of the biochemical and adiposity measures, multiple linear regression were performed. Results: Among the sample, 46% were male (n = 136), with a median age of 61 years (20 - 94 years), and 56.4% were overweight or obese (n= 168). The median vitamin K intake was 102.7 μg, or 59.9 μg, / 1000 kcal, with no difference according to sex or age. Vitamin K intake presented negative correlation with HOMA-IR (r = -0.603; p = 0.0134) and positive correlation with QUICKI (r = 0.603; p=0.0134) among normal weight male adults (n=16). In underweight elderly women (n=12), vitamin K intake was negatively correlated with total cholesterol (TC) (r = -0.644, p = 0.0443). Among females with high FMI and vitamin K intake lower than AI values (n=117), vitamin K intake was negatively correlated with HOMA-IR (r = -0.187; p = 0.0451) and positively correlated with QUICKI (r 12 = 0.187; p = 0.0451). Conclusions: Results suggest a possible relationship between dietary intake of phylloquinone, body fat, lipid profile and glucose homeostasis, among a sample of adults and elderly


Assuntos
Humanos , Adulto , Idoso , Adiposidade , Glucose/metabolismo , Homeostase , Lipídeos/sangue , Vitamina K 1 , Estudos Transversais
12.
Rev. bras. hematol. hemoter ; 39(3): 259-265, July-Sept. 2017. tab, graf, ilus
Artigo em Inglês | LILACS | ID: biblio-898939

RESUMO

Abstract The existing techniques to evaluate hemostasis in clinical laboratories are not sensitive enough to detect hypercoagulable and mild hypocoagulable states. Under different experimental conditions, the thrombin generation test may meet these requirements. This technique evaluates the overall balance between procoagulant and anticoagulant forces and has provided new insights in our understanding of the coagulation cascade, as well as of the diagnosis of hypocoagulability and hypercoagulability conditions. Thrombin generated in the thrombin generation test can be quantified as platelet-rich or platelet-poor plasma using the calibrated automated thrombogram method, which monitors the cleavage of a fluorogenic substrate that is simultaneously compared to the known thrombin activity in a non-clotting plasma sample. The calibrated automated thrombogram method is an open system, in which different antibodies, proteins, enzymes and peptides can be introduced to answer specific questions regarding hemostatic processes. The thrombin generation test has great clinical potential, such as in monitoring patients taking anticoagulants and antiplatelet drugs, screening for genetic or acquired thrombotic disorders, and evaluating bleeding risk control in patients with hemophilia using bypass agents or replacement therapy. Different to conventional coagulation tests, the thrombin generation test can be used for an overall evaluation of hemostasis, the results of which can then be used to evaluate specific characteristics of hemostasis, such as prothrombin time, activated partial thromboplastin time, and levels of fibrinogen and other coagulation factors. The introduction of this method will contribute to a better understanding and evaluation of overall hemostatic processes; however, this method still requires standardization and clinical validation.


Assuntos
Trombina , Homeostase
13.
Electron. j. biotechnol ; 29: 68-77, sept. 2017. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1017370

RESUMO

Background: Platycladus orientalis has an extremely long life span of several thousands of years, attracting great interests in the mechanisms involved in such successful senescence regulation and resistance at physiological and molecular levels. Results: The levels of reactive oxygen species (ROS) were higher in 3,000-year-old than in 20-year-old P. orientalis, and the activities of GR and GSH demonstrated the same trend. We produced and analyzed massive sequence information from pooled samples of P. orientalis through transcriptome sequencing, which generated 51,664 unigenes with an average length of 475 bp. We then used RNA-seq analysis to obtain a high-resolution age­course profile of gene expression in 20- and 3,000-year-old P. orientalis individuals. Totally, 106 differentially expressed genes were obtained, of which 47 genes were downregulated and 59 upregulated in the old tree. These genes were involved in transcription factors, hormone-related responses, ROS scavengers, senescence-related responses, stress response, and defense and possibly play crucial roles in tackling various stresses in the 3,000-year-old P. orientalis during its life time. The expression patterns of genes related to ROS homeostasis further indicated that the high ability of ROS scavenging could be helpful for the 3,000-year-old P. orientalis to resist senescence. Conclusions: This study provides a foundation for the elucidation of senescence resistance through molecular studies and the discovery of useful genes in P. orientalis.


Assuntos
Envelhecimento/genética , Cupressaceae/genética , Transcriptoma , Regulação da Expressão Gênica , Depuradores de Radicais Livres , Análise de Sequência de RNA , Espécies Reativas de Oxigênio , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Homeostase
14.
Int. j. morphol ; 35(3): 870-876, Sept. 2017. ilus
Artigo em Inglês | LILACS | ID: biblio-893066

RESUMO

The aim of this study was to perform a literature review regarding the role of hyaluronic acid (HA) in the homeostasis and therapeutics of temporomandibular joint (TMJ) osteoarthritis (OA). The TMJ has characteristics that give it special adaptation and recovery abilities, where HA plays a fundamental role in helping to maintain joint homeostasis, which is affected in pathological processes like OA. OA is a chronic degenerative multi-factor disease that can affect all the components of the synovial joints, causing degradation of the articular cartilage, extracellular matrix and breakage in the HA molecules. HA is a non-branched linear polysaccharide with viscosupplementation, anti-inflammatory, lubrication and pain relief effects; it also activates the intrinsic repair processes of the cartilage and normalizes the endogenous production of HA by the synoviocytes. In recent years, the therapeutic use of HA has shown evidence that supports its application in TMJ OA, improving viscosupplementation capacity, acting at the cellular and molecular levels, reducing various inflammatory mediators and improving the reparative characteristics. Its use has been studied in animal models and in humans. However, no consensus has been reached in terms of concentrations, dose, application frequency or molecular weight to be used.


El objetivo de este estudio fue realizar una revisión de la literatura respecto del rol del ácido hialurónico (AH) en la homeostasis y terapéutica de la osteoartritis (OA) de la articulación temporomandibular (ATM). La ATM presenta características que le confieren propiedades de adaptación y recuperación especiales, donde el AH juega un rol fundamental ayudando a mantener la homeostasis articular, la cual se ve afectada en procesos patológicos como la OA. La OA es una enfermedad multifactorial crónica degenerativa que puede afectar a todos los componentes de las articulaciones sinoviales, generando degradación del cartílago articular, matriz extracelular y quiebre de las moléculas de AH. El AH es un polisacárido lineal no ramificado que presenta efectos de viscosuplementación, antiinflamatorios, lubricantes, en el alivio del dolor, permite además, activar procesos intrínsecos de reparación del cartílago y normalizar la producción endógena de AH por parte de los sinoviositos. En los últimos años el uso terapéutico del AH ha presentado evidencia que sustenta su aplicación en OA de ATM mejorando la capacidad de viscosuplementación, actuando a nivel celular y molecular, disminuyendo diversos mediadores inflamatorios y mejorando las características reparativas. Su uso se ha estudiado en modelos animales y en humanos, sin embargo no existe consenso en cuanto a concentraciones, dosis, frecuencias de aplicación y peso molecular a utilizar.


Assuntos
Osteoartrite/tratamento farmacológico , Transtornos da Articulação Temporomandibular/tratamento farmacológico , Viscossuplementação/métodos , Ácido Hialurônico/administração & dosagem , Articulação Temporomandibular/efeitos dos fármacos , Homeostase/efeitos dos fármacos
15.
Pesqui. vet. bras ; 37(6): 582-586, jun. 2017. tab, ilus
Artigo em Inglês | LILACS, VETINDEX | ID: biblio-895453

RESUMO

The calcium homeostasis modulator 1 gene (CALHM1), which is located on chromosome 10 in humans and on chromosome 26 in cattle, is a transmembrane glycoprotein that controls the cytosolic calcium concentrations. Altered calcium homeostasis has been associated with several neurodegenerative disorders, including Alzheimer's disease (AD). In a recent study, single nucleotide polymorphisms (SNPs) of CALHM1 have been associated with sporadic Creutzfeldt-Jakob disease (CJD). The protein sequence of human CALHM1 shows 93% homology with bovine CALHM1. Although SNPs of human CALHM1 have been correlated with human prion disease, polymorphisms of the bovine CALHM1 gene have not been reported in cattle thus far. To investigate polymorphisms of the bovine CALHM1 gene in Korean native cattle, we analyzed the open reading frame (ORF) of this gene in 175 Hanwoo and 141 Holstein cattle. We observed five SNPs: c.219C>T (rs380966453), c.357C>T (rs385969338), and c.869A>G (rs516301908) within the ORF region of two exons; and c.552+92A>G (rs481706737) and c.553-3A>C (rs448524869) in the intron of bovine CALHM1. Among the three SNPs that are in the ORF region of bovine CALHM1, the genotype and allele frequencies of the c.869A>G (p.His290Arg) and c.219C>T (p.Asn73Asn) SNPs were significantly different between Hanwoo and Holstein cattle (P<0.0001). Haplotype analysis showed that haplotypes ht2, ht3 and ht5 were also significantly different in these two cattle breeds. This study provides the first genetic analysis of the bovine CALHM1 gene in cattle.(AU)


Assuntos
Animais , Bovinos , Glicoproteínas , Canais de Cálcio , Doenças Neurodegenerativas/veterinária , Polimorfismo de Nucleotídeo Único , Homeostase , Doenças Priônicas/veterinária
16.
Homeopatia Méx ; 86(708): 5-12, mayo-jun. 2017.
Artigo em Espanhol | LILACS, HomeoIndex - Homeopatia | ID: biblio-987110

RESUMO

La relación entre hormesis y Homeopatía resulta hoy en día controvertida. Por un lado, sus primeros fundamentos fueron enunciados con el objeto de explicar los efectos de la Homeopatía. Por otro lado, la mayoría de los trabajos realizados que muestran efectos horméticos fueron realizados a concentraciones mucho mayores que las utilizadas en Homeopatía. El presente trabajo muestra varios puntos de contacto entre la Homeopatía y el concepto de hormesis, y muestra la relación que existe entre los trabajos realizados sobre los efectos de la aspirina 15CH y los distintos tipos de hormesis. (AU)


The relationship between hormesis and Homeopathy is nowadays controversial. On the one hand, its first foundations were enunciated in order to explain the effects of Homeopathy. On the other hand, most of the studies performed showing hormonal effects were performed at concentrations much higher than those used in Homeopathy. The present work shows several points of contact between Homeopathy and the concept of hormesis, and shows the relationship that exists between the work done on the effects of aspirin 15CH and the different types of hormesis. (AU)


Assuntos
Aspirina , Hormese , Homeopatia , Homeostase , Baixas Potências
17.
Psicol. esc. educ ; 21(1): 21-31, enero-abr. 2017. graf
Artigo em Português | LILACS, Index Psicologia - Periódicos técnico-científicos | ID: biblio-842216

RESUMO

O conceito de multiplicação na matemática nem sempre é apreendido pelo aluno devido à utilização de práticas pedagógicas convencionais. A partir desta constatação, partimos da tese de que situações ativas, promotoras de autorregulação por meio da resolução de problemas presentes nos jogos, podem ser uma proposta efetiva na construção de conceitos. Nessa pespectiva nosso objetivo foi analisar as contribuições do Jogo do Resto para a compreensão do conceito de multiplicação. Trata-se de uma pesquisa qualitativa e aplicada que foi realizada em uma sala de aula com 30 alunos do quarto ano do Ensino Fundamental, na qual se utilizou como recurso o Jogo do Resto. Foi possível concluir que o jogo, pelo contexto cognitivo e afetivo que promove, foi cenário deengajamento dos alunos à ação. Os processos de autorregulação e situação problema promovidos nas intervenções envolveram os alunos em condutas de esforço e enfrentamento resultando em apropriação do conceito pretendido.


The concept of multiplication in mathematics is not always learned by the student due to the use of conventional pedagogical practices. From this observation, we started from the thesis that active situations, promoting self-regulation through the solution of problems present in the games, it can be an effective proposal in constructing concepts. In this perspective our objective was to analyze the contributions of the Game of the Rest for the understanding of the concept of multiplication. It is a qualitative and applied research that was carried out in a classroom with 30 students of the fourth year of Elementary School, in which the Game of the Rest was used as a resource. It was possible to conclude that the game, through the cognitive and affective context that it promotes, was a scenario of students' engagement with the action. The processes of self-regulation and problem situation promoted in the interventions involved the students in conducts of effort and confrontation resulting in appropriation of the intended concept.


El concepto de multiplicación en las matemáticas no siempre es aprehendido por el alumno debido a la utilización de prácticas pedagógicas convencionales. A partir de esta constatación, partimos de la tesis de que situaciones activas, promotoras de autorregulación por intermedio de la resolución de problemas presentes en los juegos, pueden ser una propuesta efectiva en la construcción de conceptos. En esa perspectiva nuestro objetivo fue analizar las contribuciones del Juego del Resto para la comprensión del concepto de multiplicación. Se trata de una investigación cualitativa y aplicada que se realizó en una sala de clase con 30 alumnos del cuarto curso de la Enseñanza Primaria, en la cual se utilizó como recurso el Juego del Resto. Fue posible concluir que el juego, por el contexto cognitivo y afectivo que promueve, fue escenario de participación de los alumnos a la acción. Los procesos de autorregulación y situación problema promovidos en las intervenciones abarcaran los alumnos en conductas de esfuerzo y enfrentamiento resultando en apropiación del concepto pretendido.


Assuntos
Humanos , Comportamento do Adolescente/psicologia , Homeostase/fisiologia , Matemática/educação
18.
Rev. chil. endocrinol. diabetes ; 10(2): 53-58, abr. 2017. ilus, tab
Artigo em Espanhol | LILACS | ID: biblio-998968

RESUMO

The evaluation of insulin resistance (IR) in clinical practice is based on the determination of fasting insulin (I0) and insulin level after 2 hours in an oral glucose tolerance test (OGT). However, there are not adequate cutoff points to discriminate IR patients. Objectives: to evaluate the reliability of insulin levels in the diagnosis of IR using the intravenous insulin tolerance test (IVITT) as the gold standard. Patients and Method: The OGT and IVITT of patients who participated as cases or controls in research protocols were analyzed. We excluded those cases with fasting glycemia over126 mg/dl. Results: 128 cases, 111 F, 17 M; Age: 40.3 +/- 14.8 years; BMI: 33 +/- 8 kg/m2; Waist circumference, M: 100.3 +/- 9.4 cm, F: 96 +/- 15 cm. According to IVITT (KITT), 103 (80.5 percent) were IR (KITT < 4.5 percent) and 25 (19.5 percent) were non IR (KITT > 4.5 percent). Fasting (G0) and 120 minutes after glucose challenge glycemia (G120), I0 and I120, HOMA and area under the glycemia and insulin curve, were significantly higher in the IR, as the same as, hypertension and acanthosis nigricans features (p < 0.05). According to G120, 45 cases (35.2 percent) had glucose intolerance, 9 (7 percent) diabetes and 74 (57.8 percent) were normals. In addition to G0, only IVITT was significantly different among the 3 groups (p = 0.025), identifying most insulin resistant subjects. The sensitivity and specificity for a cutoff point of I120 at 60 µIU/mL, were 30 percent and 88 percent, respectively. Conclusion: Baseline and 120 minutes post glucose charge insulin levels and HOMA, do not discriminate insulin resistant subjects, especially when there is fasting or post-stimulus hyperglycemia. Therefore, they are not recommended for individual diagnosis or therapeutic decisions


Assuntos
Humanos , Masculino , Adolescente , Resistência à Insulina , Teste de Tolerância a Glucose/métodos , Estudos de Casos e Controles , Curva ROC , Sensibilidade e Especificidade , Homeostase , Insulina/sangue
20.
Acta cir. bras ; 32(3): 219-228, Mar. 2017. tab, graf
Artigo em Inglês | LILACS | ID: biblio-837687

RESUMO

Abstract: Purpose: To investigate the microbiological, inflammatory and oxidant effects of adjuvant ozone administration in experimental rat vascular graft infection model which has not been previously investigated. Methods: Forty adult Wistar rats were divided into Sham, Control, Vancomycin, Ozone, Vancomycin+Ozone groups. Grafts were inoculated with Methicillin-resistant Staphylococcus aureus (MRSA) strain and implanted subcutaneously. Rats were treated intraperitoneally with ozone and /or intramuscularly with vancomycin for 10 days. Grafts were evaluated by quantitative bacterial cultures. Blood samples were harvested for determination of thiol-disulphide and cytokine profiles. Results: There was no significant difference in bacterial counts between Control and Ozone Groups. In the Ozone Group median colony count was significantly higher than the Vancomycin and Vancomycin+Ozone Groups. Total thiol and disulphide levels increased and disulphide/native thiol and disulphide/total thiol ratios decreased in Ozone Group significantly. Albumin levels decreased significantly in Vancomycin and Vancomycin+Ozone Groups compared to the Sham Group. IL-1 and TNF-alpha levels significantly increased in infected rats. Decreased levels of VEGF due to infection reversed by ozone therapy in control and vancomycin groups. Conclusions: We didn't observe any benefit of the agent on MRSA elimination in our model. Likewise, effects of ozone on thiol-disulphide homeostasis and inflammatory cytokines were contradictory.


Assuntos
Animais , Masculino , Oxidantes Fotoquímicos/farmacologia , Ozônio/farmacologia , Infecções Estafilocócicas/tratamento farmacológico , Dissulfetos/sangue , Staphylococcus aureus Resistente à Meticilina/efeitos dos fármacos , Enxerto Vascular , Valores de Referência , Fatores de Tempo , Doenças Vasculares/microbiologia , Albumina Sérica/análise , Vancomicina/farmacologia , Contagem de Colônia Microbiana , Distribuição Aleatória , Reprodutibilidade dos Testes , Citocinas/sangue , Resultado do Tratamento , Ratos Wistar , Transplantes/microbiologia , Staphylococcus aureus Resistente à Meticilina/crescimento & desenvolvimento , Homeostase/efeitos dos fármacos , Antibacterianos/farmacologia
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