ABSTRACT
The objective of this study was to evaluate the spatial distribution of purebred Bos taurus taurus bovine breeds raised in Brazil in association with climatic, physical and socioeconomic variables. The breeds Aberdeen Angus, Ayrshire, Braford, Brangus, Charolais, Devon, Flemish, Hereford, Pinzgauer, Shorthorn and Simental were classified according to their aptitude (milk, meat or dual-purpose). They were spatialized according to their aptitude using state and municipal information. The milk breeds were found in the states of Rio Grande do Sul and Santa Catarina, while the dual-purpose breeds were found in Minas Gerais and Rio Grande do Sul states and the beef breeds were concentrated in the southern region. Only the Aberdeen Angus meat breed showed higher dispersion in other regions. Meat and dual-purpose breeds tended to be raised in regions with lower maximum temperature, average temperature, thermal amplitude and temperature-humidity index. Dual-purpose breeds were found in municipalities with high humidity and altitude, but with a low gross domestic product, little technical guidance received from cooperatives and the government, low control of diseases and parasites, as well as low use of pasture rotation systems. The spatial distribution of Brazilian bovine taurine breeds, regardless of aptitude, was related to climatic, physical and socioeconomic factors.(AU)
O objetivo deste estudo foi avaliar a distribuição espacial de raças bovinas puras Bos taurus taurus criadas no Brasil, associadas a variáveis climáticas, físicas e socioeconômicas. As raças Aberdeen Angus, Ayrshire, Braford, Brangus, Charolês, Devon, Flamenga, Hereford, Pinzgauer, Shorthorn e Simental foram classificadas de acordo com sua aptidão (leite, carne ou duplo-propósito). Elas foram espacializadas de acordo com sua aptidão a partir de informações estaduais e municipais. As raças leiteiras foram encontradas nos estados do Rio Grande do Sul e de Santa Catarina, enquanto as raças de duplo-propósito foram encontradas nos estados de Minas Gerais e Rio Grande do Sul, e as raças de carne concentraram-se na região Sul. Apenas a raça de carne Aberdeen Angus apresentou maior dispersão nas demais regiões. As raças de carne e de duplo-propósito tendem a ser criadas em regiões com menores temperatura máxima, temperatura média, amplitude térmica e índice de temperatura e umidade. As raças de duplo-propósito foram encontradas em municípios com alta umidade e altitude, mas com baixo produto interno bruto, pouca orientação técnica recebida de cooperativas e do governo, baixo controle de doenças e de parasitas e baixo uso de sistema de rotação de pastagens. A distribuição espacial das raças taurinas bovinas brasileiras, independentemente da aptidão, foi relacionada a fatores climáticos, físicos e socioeconômicos.(AU)
Subject(s)
Animals , Cattle , Adaptation, Biological , Socioeconomic Survey , Climate , Animal Distribution , Animal Husbandry/methods , BrazilABSTRACT
Ouabain, an endogenous digitalis compound, has been detected in nanomolar concentrations in the plasma of several mammals and is associated with the development of hypertension. In addition, plasma ouabain is increased in several hypertension models, and the acute or chronic administration of ouabain increases blood pressure in rodents. These results suggest a possible association between ouabain and the genesis or development and maintenance of arterial hypertension. One explanation for this association is that ouabain binds to the α-subunit of the Na+ pump, inhibiting its activity. Inhibition of this pump increases intracellular Na+, which reduces the activity of the sarcolemmal Na+/Ca2+ exchanger and thereby reduces Ca2+ extrusion. Consequently, intracellular Ca2+ increases and is taken up by the sarcoplasmic reticulum, which, upon activation, releases more calcium and increases the vascular smooth muscle tone. In fact, acute treatment with ouabain enhances the vascular reactivity to vasopressor agents, increases the release of norepinephrine from the perivascular adrenergic nerve endings and promotes increases in the activity of endothelial angiotensin-converting enzyme and the local synthesis of angiotensin II in the tail vascular bed. Additionally, the hypertension induced by ouabain has been associated with central mechanisms that increase sympathetic tone, subsequent to the activation of the cerebral renin-angiotensin system. Thus, the association with peripheral mechanisms and central mechanisms, mainly involving the renin-angiotensin system, may contribute to the acute effects of ouabain-induced elevation of arterial blood pressure.
Subject(s)
Animals , Humans , Rats , Blood Pressure/drug effects , Cardiotonic Agents/pharmacology , Hypertension/chemically induced , Ouabain/pharmacology , Angiotensin II/biosynthesis , Calcium/metabolism , Cardiotonic Agents/administration & dosage , Cardiotonic Agents/metabolism , Central Nervous System/drug effects , Hypertension/metabolism , Injections, Intravenous , Norepinephrine , Ouabain/administration & dosage , Ouabain/metabolism , Peptidyl-Dipeptidase A/metabolism , Renin-Angiotensin System/drug effects , Sodium-Potassium-Exchanging ATPase/drug effects , Sodium-Potassium-Exchanging ATPase/physiologyABSTRACT
We investigated the effects of low ouabain concentrations on systolic (SAP) and diastolic (DAP) arterial pressures and on pressor reactivity in 3-month-old male spontaneously hypertensive rats (SHR). Arterial blood pressure (BP) and pressor reactivity to phenylephrine (PHE) were investigated before and after 0.18 ìg/kg ouabain administration (N = 6). The influence of hexamethonium (N = 6), canrenone (N = 6), enalapril (N = 6), and losartan (N = 6) on ouabain actions was evaluated. Ouabain increased BP (SAP: 137 ± 5.1 to 150 ± 4.7; DAP: 93.7 ± 7.7 to 116 ± 3.5 mmHg; P<0.05) but did not change PHE pressor reactivity. Hexamethonium reduced basal BP in control but not in ouabain-treated rats. However, hexamethonium + ouabain increased DAP sensitivity to PHE. Canrenone did not affect basal BP but blocked ouabain effects on SAP. However, after canrenone + ouabain administration, DAP pressor reactivity to PHE still increased. Enalapril and losartan reduced BP and abolished SAP and DAP responses to ouabain. Enalapril + ouabain reduced DAP reactivity to PHE, while losartan + ouabain reduced SAP and DAP reactivity to PHE. In conclusion, a small dose of ouabain administered to SHR increased BP without altering PHE pressor reactivity. Although the renin-angiotensin system (RAS), Na+ pump and autonomic reflexes are involved in the effects of ouabain on PHE reactivity, central mechanisms might blunt the actions of ouabain on PHE pressor reactivity. The effect of ouabain on SAP seems to depend on the inhibition of both Na+ pump and RAS, whereas the effect on DAP seems to depend only on RAS.
Subject(s)
Animals , Male , Rats , Enzyme Inhibitors/pharmacology , Hypertension/chemically induced , Ouabain/pharmacology , Renin-Angiotensin System/drug effects , Sodium-Potassium-Exchanging ATPase/antagonists & inhibitors , Antihypertensive Agents/pharmacology , Hypertension/prevention & control , Phenylephrine/pharmacology , Rats, Inbred SHR , Renin-Angiotensin System/physiologyABSTRACT
The investigation of resistance vessels is generally costly and difficult to execute. The present study investigated the diameters and the vascular reactivity of different segments of the rat tail artery (base, middle, and tail end) of 30 male Wister rats (EPM strain) to characterize a conductance or resistance vessel, using a low-cost simple technique. The diameters (mean ± SEM) of the base and middle segments were 471 ± 4.97 and 540 ± 8.39 µm, respectively, the tail end was 253 ± 2.58 µm. To test reactivity, the whole tail arteries or segments were perfused under constant flow and the reactivity to phenylephrine (PHE; 0.01-300 µg) was evaluated before and after removal of the endothelium or drug administration. The maximal response (Emax) and sensitivity (pED50) to PHE of the whole tail and the base segment increased after endothelium removal or treatment with 100 µM L-NAME, which suggests modulation by nitric oxide. Indomethacin (10 µM) and tetraethylammonium (5 mM) did not change the Emax or pED50 of these segments. PHE and L-NAME increased the pED50 of the middle and the tail end only and indomethacin did not change pED50 or Emax. Tetraethylammonium increased the sensitivity only at the tail end, which suggests a blockade of vasodilator release. Results indicate that the proximal segment of the tail artery possesses a diameter compatible with a conductance vessel, while the tail end has the diameter of a resistance vessel. In addition, the vascular reactivity to PHE in the proximal segment is nitric oxide-dependent, while the tail end is dependent on endothelium-derived hyperpolarizing factor.
Subject(s)
Animals , Male , Rats , Blood Pressure/physiology , Endothelium, Vascular/physiology , Tail/blood supply , Vascular Resistance/physiology , Arteries/anatomy & histology , Arteries/drug effects , Arteries/physiology , Blood Pressure/drug effects , Endothelium, Vascular/drug effects , Models, Animal , Phenylephrine/pharmacology , Rats, Wistar , Regional Blood Flow/drug effects , Regional Blood Flow/physiology , Vascular Resistance/drug effects , Vasoconstrictor Agents/pharmacologyABSTRACT
Neste estudo foram incluidos 148 doentes, sendo 65 com pitiriase versicolor e 83 com dermatofitoses, submetidos a tratamento com ketoconazole por via oral. A dose diaria foi de 200mg (um comprimido) durante duas a quatro semanas para os casos de pitiriase versicolor e de quatro a oito semanas para os de dermatofitoses. O tratamento determinou, nos doentes de pitiriase versicolor, cura clinica e micologica em 50 (78,1%), apenas cura clinica em dois (3,1%) e cura micologica em um (1,6%). Nos doentes com dermatofitoses, em 69 (84,1%) houve cura clinica e micologica, quatro (4,9%) apresentaram cura micologica e cinco (6,1%) tiveram apenas cura clinica. Efeitos colaterais foram observados em 11 doentes (7,4%), sendo que dois necessitaram abandonar o tratamento por intolerancia (um teve nauseas de grau moderado e outro, nauseas, vomitos e tonturas de grau moderado, ambos no 1o. dia de tratamento).O ketoconazole por via oral demonstrou ser bastante eficaz no tratamento de pitiriase versicolor e de dermatofitoses
Subject(s)
Adult , Middle Aged , Humans , Male , Female , Dermatomycoses , KetoconazoleABSTRACT
Discursa sobre a importância da epidemiologia para a Saúde Coletiva e sobre o 8º Congresso Brasileiro de Epidemiologia. Afirma, ainda, que vivemos um momento de grandes desafios, como o rápido envelhecimento da população e a epidemia de crack, o elevado número de morte de jovens, principalmente negros, e o alto índice de acidentes de trânsito. Sobre a economia, Padilha ressaltou que nenhum país do mundo enriqueceu sem ter a saúde como centro de seu projeto econômico de desenvolvimento. Arquivo disponível para audição e/ou download no link ao lado.
ABSTRACT
O principal objetivo do seminário, foi debater os cinco temas: "Governança para enfrentar as causas das iniqüidades em saúde: implementação de açoes sobre os determinantes sociais da saúde"; "O papel do setor da saúde, incluindo programas de saúde pública, na redução das iniquidades em saúde"; "Promovendo a participação: liderança comunitária para as ações sobre os determinantes sociais"; "Ação global sobre os determinantes sociais: coordenando as prioridades e as partes interessadas"; "Monitorando o progresso: medição e análise para fundamentar as políticas sobre os determinantes sociais" que serão abordados na CMDSS que se realizará no Brasil, na cidade do Rio de Janeiro, de 19 a 21 de outubro de 2011. Arquivo disponível para audição e/ou download no ícone ao lado.
ABSTRACT
A oficina teve como objetivo propiciar um intercâmbio de conhecimentos e reflexão sistemática sobre os sistemas de saúde à luz dos desafios da universalidade, integralidade e equidade. Visa identificar fortalezas e debilidades que permitam o desenvolvimento de linhas de cooperação e trabalho para o Instituto. Arquivo disponível para audição e/ou download no ícone ao lado.
ABSTRACT
Aula proferida pelo Ministro da Saúde, Alexandre Padilha, no dia 20 de maio de 2011. O evento foi transmitido em tempo real pela internet e teve 46 acessos, sendo que grande parte dos acessos foram realizados para grupos de pessoas. O ministro também descerrou a placa de inauguração do novo curso. Arquivo disponível no link ao lado.