52 resultados para ensaio de ligação

em Universidade Federal do Rio Grande do Norte(UFRN)


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CAVALCANTE,Cleonice Andréa Alves, NÓBREGA, Jussara Azevedo Bezerra da, ENDERS,Bertha Cruz, MEDERIROS, Soraya Maria de. Promoção da saúde e trabalho: um ensaio analítico. Revista Eletrônica de Enfermagem. v.10,n.1 p.241-248.2008. Disponível em :.

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The mushrooms have been object of intense research in view of its potential raising of application in different sectors of the pharmacology and alimentary industry. Among diverse bioactive composites of polyssacharides nature that exist in the fungus the glucans are much searched. These are polymers of glucose and classified as the type of glicosidic linking [α, β]. Peroxisome proliferator-activated receptors (PPARs), ranscription factors belonging to the family of nuclear receptors that bind themselves o specific agonists, have shown their importance in controlling the inflammatory process. The aim of this study was to perform a chemical characterization of extract rom the mushroom Caripia montagnei, assess its antiinflammatory and antibacterial effect and determine if this effect occurs via PPAR. This mushroom is composed of carbohydrates (63.3±4.1%), lipids (21.4l±0.9%) and proteins (2.2± 0.3%). The aqueous solution resulting from the fractionation contained carbohydrates (98.7±3.3%) and protein (1.3±0.25%). Analyses of infrared spectrophotometry and of nuclear magnetic esonance demonstrated that the extract of mushroom C. montagnei is rich in β-glucans. In hioglycolate-induced peritonitis, the C. montagnei glucans (50 mg/kg) educed the inflammatory process in 65.5±5.2% and agonists, pharmacological igands, for PPAR: Wy-14643 (49.3±6.1%), PFOA (48.9±3.8%) and clofibrate in 45.2±3.2%. Sodium diclofenac showed a reduction of 81.65±0.6%. In the plantar edema, the glucans from C. montagnei (50 mg/kg) and L-NAME reduced the edema to a similar degree 91.4±0.3% and 92.8±0,5 %, respectively. In all the groups tested, nitric oxide (NO), an inflammation mediator, showed a significant reduction in the nitrate/nitrite levels when compared to the positive control (P<0.001). The C. montagnei glucans did not show cytotoxicity in the concentrations tested (2.5, 5.0, 10.0, 20.0 and 40.0 µg/100 µL). Antibacterial activity demonstrated that, unlike total extract, there was no inhibition of bacterial growth. The C. montagnei glucans show great potential for antiinflammatory applications. This effect suggests that it is mediated by PPAR activation and by COX and iNOS inhibition

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Chitin is an important structural component of the cellular wall of fungi and exoskeleton of many invertebrate plagues, such as insects and nematodes. In digestory systems of insects it forms a named matrix of peritrophic membrane. One of the most studied interaction models protein-carbohydrate is the model that involves chitin-binding proteins. Among the involved characterized domains already in this interaction if they detach the hevein domain (HD), from of Hevea brasiliensis (Rubber tree), the R&R consensus domain (R&R), found in cuticular proteins of insects, and the motif called in this study as conglicinin motif (CD), found in the cristallography structure of the β-conglicinin bounded with GlcNac. These three chitin-binding domains had been used to determine which of them could be involved in silico in the interaction of Canavalia ensiformis and Vigna unguiculata vicilins with chitin, as well as associate these results with the WD50 of these vicilins for Callosobruchus maculatus larvae. The technique of comparative modeling was used for construction of the model 3D of the vicilin of V. unguiculata, that was not found in the data bases. Using the ClustalW program it was gotten localization of these domains in the vicilins primary structure. The domains R&R and CD had been found with bigger homology in the vicilins primary sequences and had been target of interaction studies. Through program GRAMM models of interaction ( dockings ) of the vicilins with GlcNac had been gotten. The results had shown that, through analysis in silico, HD is not part of the vicilins structures, proving the result gotten with the alignment of the primary sequences; the R&R domain, although not to have structural similarity in the vicilins, probably it has a participation in the activity of interaction of these with GlcNac; whereas the CD domain participates directly in the interaction of the vicilins with GlcNac. These results in silico show that the amino acid number, the types and the amount of binding made for the CD motif with GlcNac seem to be directly associates to the deleterious power that these vicilins show for C. maculatus larvae. This can give an initial step in the briefing of as the vicilins interact with alive chitin in and exert its toxic power for insects that possess peritrophic membrane

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Chitin-binding vicilins from legume seeds (Erythrina velutina. Canavalia ensiformes and Phaseolus vulgares) were isolated by ammonium sulfate followed by affinity chromatography on a chitin column. Effect of these vicilins on female adults of Ceratitis capitata was examined by bioassay and in a semi-field assay model. Mechanism of action of the vicilins was determined by in vivo digestibility and chitin affinity. Among the tested vicilins, E. velutina when added to diet caused strong effect on mortality at 10% dose. This insecticidal property was tested in a semi-field assay which showed the same effect observed in laboratory conditions, where doses of 10% and 15% were lethal to female adults of C. capitata. These deleterious effects were not only associated to the binding to chitin structures present in peritrophic membrane, but principally to its low digestibility in the C. capitata digestive tract. This fact was confirmed because chiting binding proteins as WGA and the other tested vicilins were not toxic to female adults of C. capitata due susceptibility of these proteins to digestive enzymes of the insects. By other side EvV was more resistant to digestive enzymes, causing deleterious effects on female adults of C. capitata. These results showed that EvV may be part of the pest management programs or an alternative in plant improvement program in the population control of this fruticulture pest

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Marine algae are one of the major sources of biologic compounds. In extracellular matrix of these organisms there are sulfated polysaccharides that functions as structural components and provides protection against dehydration. The fraction 1.0 (F1.0) rich in sulfated galactans obtained from red seaweed Hypnea musciformis was physicochemical characterized and evaluated for pharmacologic activity through antioxidant activity, cytotoxic action on erythrocytes, anticoagulant, stimulatory action under antithrombotic heparan sulfate synthesis and their effects on cell proliferation and cycle cell progression. The main components of F1.0 were carbohydrates (49.70 ± 0.10%) and sulfate (44.59 ± 0.015%), presenting phenolic compounds (4.79 ± 0.016%) and low protein contamination (0.92 ± 0.001%). Fraction 1.0 showed polidisperse profile and signs in infrared analysis in 1262, 1074 and 930, 900 and 850 attributed to sulfate esters S=O bond, presence of a 3,6- anidrogalactose C-O bond, non-sulfated β-D-galactose and a C-O-SO4 bond in galactose C4, respectively. The fraction rich in sulfated galactans exhibited strong antioxidant action under lipid peroxidation assay with IC50 of 0.003 mg/mL. Besides the inhibition of hemolysis induced by H2O2 in erythrocytes treated with F1.0, this fraction did not promote significant cytotoxity under erythrocytes membranes. F1.0 exhibited low anticoagulant activity causing moderate direct inhibition of enzimatic activity of thrombin. This fraction promoted stimulation around of 4.6 times on this synthesis of heparan sulfate (HS) by rabbit aortic endothelial cells (RAEC) in culture when was compared with non treated cells. The fraction of this algae displayed antiproliferative action under RAEC cells causing incresing on cell number on S fase, blocking the cycle cell progression. Thus F1.0 presented cytostatic and no cytotoxic action under this cell lineage. These results suggest that F1.0 from H. musciformis have antioxidant potential which is a great effect for a compound used as food and in food industry which could be an alternative to food industry to prevent quality decay of lipid containing food due to lipid peroxidation. These polysaccharides prevent the lipid peroxidation once the fraction in study exhibited strong inhibitory action of this process. Furthermore that F1.0 present strong antithrombotic action promoting the stimulation of antithrombotic HS synthesis by endothelial cells, being important for thrombosis preventing, by its inhibitory action under reactive oxygen species (ROS) in some in vitro methods, being involved in promotion of hypercoagulability state.

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Seaweeds are a major source of biologically active compounds . In the extracellular matrix of these organisms are sulfated polysaccharides that functions as structural components preventing it against dehydration. The fraction 0.9 (FucB) rich in sulfated fucans obtained from brown seaweed Dictyota menstrualis was chemical characterized and evaluated for pharmacological activity by testing anticoagulant activity, stimulatory action on the synthesis of an antithrombotic heparan sulfate, antioxidant activity and its effects in cell proliferation. The main components were FucB carbohydrates (49.80 ± 0.10 %) and sulfate (42.30 ± 0.015 %), with phenolic compounds ( 3.86 ± 0.016 %) and low protein contamination ( 0.58 ± 0.001 % ) . FucB showed polydisperse profile and analysis of signals in the infrared at 1262, 1074 and 930 cm -1 and 840 assigned to S = O bonds sulfate esters , CO bond presence of 3,6- anhydrogalactose , β -D- galactose non- sulfated sulfate and the axial position of fucose C4 , respectively. FucB exhibited moderate anticoagulant activity , the polysaccharides prolonged time (aPTT ) 200 ug ( > 90s ) partial thromboplastin FucB no effect on prothrombin time (PT), which corresponds to the extrinsic pathway of coagulation was observed. This stimulation promoted fraction of about 3.6 times the synthesis of heparan sulfate (HS) by endothelial cells of the rabbit aorta ( RAEC ) in culture compared with cells not treated with FucB . This has also been shown to compete for the binding site with heparin. The rich fraction sulfated fucans exhibited strong antioxidant activity assays on total antioxidant (109.7 and 89.5 % compared with BHT and ascorbic acid standards ) , reducing power ( 71 % compared to ascorbic acid ) and ferric chelation ( 71 , comparing with 5 % ascorbic acid). The fraction of algae showed cytostatic activity on the RAEC cells revealed that the increase of the synthesis of heparan sulfate is not related to proliferation. FucB showed antiproliferative action on cell lines modified as Hela and Hep G2 by MTT assay . These results suggest that FucB Dictyota menstrualis have anticoagulant , antithrombotic , antioxidant potential as well as a possible antitumor action, promoting the stimulation of the synthesis of antithrombotic HS by endothelial cells and is useful in the prevention of thrombosis, also due to its inhibitory action on species reactive oxygen ( ROS ) in some in vitro systems , being involved in promoting a hypercoagulable state

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This work aims to develop a methodology for analysis of images using overlapping, which assists in identification of microstructural features in areas of titanium, which may be associated with its biological response. That way, surfaces of titanium heat treated for 08 (eight) different ways have been subjected to a test culture of cells. It was a relationship between the grain, texture and shape of grains of surface of titanium (attacked) trying to relate to the process of proliferation and adhesion. We used an open source software for cell counting adhered to the surface of titanium. The juxtaposition of images before and after cell culture was obtained with the aid of micro-hardness of impressions made on the surface of samples. From this image where there is overlap, it is possible to study a possible relationship between cell growth with microstructural characteristics of the surface of titanium. This methodology was efficient to describe a set of procedures that are useful in the analysis of surfaces of titanium subjected to a culture of cells

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Fibromyalgia (FM) is a chronic rheumatic syndrome characterized by diffuse muscle-skeletal pain, and aerobic exercises represent a fundamental portion in therapeutic approach. Objective of this study was to evaluate the effectiveness of aerobic exercises accomplished in the water of the sea (thalassotherapy) for women with FM and to compare with exercises accomplished in the swimming pool, involving a multidisciplinary team, composed by rheumatologists, physical therapists, students of physical therapy and students of physical education. Forty six (46) women with age between 18 and 60 years with FM were randomized in 2 groups: a swimming pool group (23 patients) and a sea group (23 patients). 80th groups trained a week with the same program of aerobic conditioning 3 times (60 minutes each) for 12 weeks. Ali the patients were evaluated, before and immediately after treatment, with Visual Analogical Scale (VAS) for pain and fatigue, number of tending points, Fibromyalgia Impact Ouestionnaire (FIO), Short Form 36 Health Survey (SF-36), Pittsburgh Sleep Ouality Index (PSOI) and Beck Oepression Inventory (BOI). For statistical analysis, it was used paired-t test for analysis intra-group and non-paired test for inter-groups analysis, significance levei of p <0,05. Four patients, of each group, didn't complete the training programo Groups were homogeneous and they were compared in initial evaluation, except for BOI (p <0,05). Both groups presented statistically significant improvement for ali appraised parameters in the post-treatment compared with initial evaluation, there were reduction of intensity of pain and fatigue, number of tending points, better functional capacity (FIO), life quality (SF-36), quality of sleep (PSQI) and depression indexes (BOI). However, in comparison among the groups, group of sea (thalassotherapy) presented better results for ali parameters, however with statistically significant difference just only for depression indexes (BOI). At the end, it was observed that accomplishment of aerobic exercises in sea water or swimming pool was effective as part of treatment for patients with FM. However, exercise programs with thalassotherapy seems to bring more benefits, mainly related to emotional aspects, could be a therapeutic option of low cost for patients with FM in our area

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Introdução: A criação de programas de equipe multiprofissional de saúde desponta como uma alternativa eficiente para controlar a evolução dos pacientes portadores de diabetes, e a inserção do farmacêutico em tais programas tem contribuído para melhorar o acompanhamento desses pacientes. Objetivo: Avaliar o impacto da intervenção do farmacêutico no acompanhamento dos pacientes diabéticos tipo 2, em farmácias comunitárias. Métodos: Ensaio clínico randomizado, uni-cego envolvendo 100 pacientes diabéticos tipo 2 de ambos os gêneros, usuários de farmácia comunitária, com idade igual ou superior a 30 anos, em uso de hipoglicemiantes orais com adição ou não de insulina e foram acompanhados por 6 meses. Os pacientes do grupo controle receberam o tratamento habitual existente em qualquer farmácia, e os de intervenção receberam o acompanhamento do farmacêutico incluindo intervenções aos problemas relacionados aos medicamentos. Os desfechos primários avaliados foram os valores da hemoglobina glicada (HbA1c), glicose basal e um questionário de qualidade de vida validado denominado de Diabetes Quality of Life Measure (DQOL) - Brasil; e como desfechos secundários as dosagens dos triglicérides, colesterol total, (HDL) colesterol, (LDL) colesterol, tensão arterial e a satisfação do usuário com o serviço prestado. Essa pesquisa contou com a colaboração de vários profissionais das diferentes áreas do conhecimento a seguir nominados: médico, farmacêutico bioquímico, enfermeiro, nutricionista e estatístico. Resultados: Finalizaram o estudo 89 pacientes. Durante o acompanhamento 95,7% (45/47) dos pacientes no grupo intervenção apresentaram problemas relacionados aos medicamentos (PRM), perfazendo um total de 141, com uma média de 3 eventos por paciente, ocorrendo uma resolutividade de 61,7% (87/141). A categoria que mais apresentou PRM foi a de efetividade com 34,1% (48/141) e a classe farmacológica mais utilizada foi a dos hipoglicemiantes orais com 35% (49/141). As variáveis de desfechos primários como hemoglobina glicada (HbA1c) e a glicose basal não apresentaram valores estatisticamente significantes quando comparadas o final com o inicial do acompanhamento nos grupos intervenção e controle considerando um p<0,05, mas o questionário de qualidade de vida DQOL Brasil apresentou resultados estatisticamente significante com um p=0,000. Os desfechos secundários, com exceção da satisfação do usuário, não apresentaram valores xi estatisticamente significantes quando comparados o final com o início do acompanhamento nos grupos de intervenção e controle. Conclusão: Os resultados indicam que as modificações das variáveis clínicas não apresentaram valores significativos no controle da enfermidade e comorbidades, enquanto que na avaliação da qualidade de vida os pacientes afirmaram que melhoraram; portanto, pode-se postular que a intervenção farmacêutica é uma atividade necessária, mas que a prática do Pharmaceutical Care trará benefícios com sustentabilidade para os pacientes se houver uma efetiva integração do farmacêutico numa equipe multiprofissional de saúde, o que está indisponível nas Farmácias Comunitárias

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A analgesia pós-operatória eficaz é especialmente importante após cirurgias torácicas, pois, além de aliviar a dor, facilita a retomada de atividades normais, incluindo a deambulação, a respiração e a tosse. Dessa forma, os objetivos deste estudo são: avaliar a eficácia analgésica da associação entre anestesia geral e raquianestesia com morfina e ropivacaína mais esquema multimodal em relação à anestesia geral e esquema multimodal em cirurgia de revascularização do miocárdio; analisar a eficácia analgésica da injeção subcutânea de lidocaína e analgesia multimodal na remoção de tubos torácicos em cirurgia de revascularização do miocárdio. A metodologia consiste em ensaio clínico randomizado, controlado, envolvendo 58 pacientes, de ambos os sexos, com idade média de 59,8  8,9 anos, estado físico ASA II e III. Os participantes foram alocados em dois grupos, sendo o GI composto por indivíduos submetidos à anestesia geral combinada à raquianestesia com morfina 400μg e 6 ml (30mg) a 8 ml (40mg) de ropivacaína a 0,5% e analgesia multimodal; já o GII foi composto por indivíduos submetidos à anestesia geral associada à analgesia multimodal. Foi avaliada a dor, ao despertar, nas primeiras 24 horas, e ao realizar exercício respiratório, ao retirar drenos de torácicos e o tempo para extubação. A análise estatística foi realizada pelos testes do Qui-quadrado e Teste t de Student e o teste de Fisher. O resultado obtido foi o seguinte: o GI apresentou menor intensidade de dor ao despertar (p= 0,001), nas primeiras 24 horas (p= 0,001) e durante a realização dos exercícios respiratórios (p= 0,004). Houve maior necessidade de analgesia complementar no grupo GII, com maior consumo de morfina (p= 0,05), e os efeitos colaterais leves, como náuseas (p= 0,001), vômito (p= 0,002), prurido (p= 0,030), predominaram no GI. Não houve diferença estatisticamente significante entre os grupos (P= 0,47), em relação à intensidade de dor na remoção dos drenos. Após as observações feitas, o estudo sugere que a anestesia geral combinada à raquianestesia com morfina associada à ropivacaína oferece melhor efeito analgésico no pós-operatório de cirurgia cardíaca. Adicionalmente, o estudo sugere que o efeito analgésico da injeção subcutânea de lidocaína 1% associado à analgesia multimodal não é eficaz

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Conselho Nacional de Desenvolvimento Científico e Tecnológico

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PURPOSE: To evaluate the capacity of clofazimine (CFZ) to control cutaneous activity of systemic lupus erythematosus (SLE), compared with chloroquine diphosphate (CDP). METHODS: A prospective, randomized, controlled, double blind clinical trial was carried out in thirty-three patients with SLE and cutaneous lesions (malar rash and/or discoid lupus and/or subacute cutaneous lupus), after approval by the respective Ethics Committee. Sixteen patients received clofazimine - 100mg/day (CFZ group) and 17 received chloroquine diphosphate - 250mg/day (CDP group), during six months. Both groups applied broad-spectrum sunscreens twice a day. The dose of prednisone was kept stable during the study. Cutaneous lesions were evaluated by 2 blinded observers and photographed at baseline and at months 1, 2, 4 and 6. RESULTS: Thirty-three patients began and 27 completed the 6 months of treatment. The groups were homogeneous and comparable in terms of demographic and clinical characteristics. Five CFZ-patients and one CDP-patients dropped out due to severe flare of disease requiring other treatment. At the end of the study, 12 CFZ-patients (75%) and 14 CDP-patients (82,4%) presented complete or near-complete remission of skin lesions; intention-to-treat analysis showed no significant difference in the response rates between groups. Side effects in both groups were frequent, but patients didn t have to discontinue the drugs. CONCLUSIONS: Clofazimine and chloroquine were effective in controlling cutaneous lesions in SLE patients

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The thesis intends to discuss the ethics by the way of love. So, it uses as a mention the musical work and the set of attitudes of the group that changed the way of thinking across the 20th Century mass-comm, entering a new way of thinking about the World: The Beatles. Analyzing the lyrics and the writing of the songs was searched the comprehension of he intrinsic love message at the Ethics it expresses. At the musical art of The Beatles political messages had been announced in a time that the World sought a Ethic way beyond the several declared war and the Cold War. Taking the Edgar Morin works as a base, O método 6, Ética (2005), it sought to understand the idea who permeates the human relations: the good, the possible, the necessary. Another works used as a cognitive base were Meus demônios (2003), Cultura de massas no Século XX: neurose (2005), Cultura de massas no Século XX (2006), The Beatles Anthology (2000) and Many years from now (2000). Holding the Ethics idea showed by Morin were established imaginary lines that perpass the behavior of the group known in the entire World understood till nowadays as tolerance, comprehension, peace, love and endurance messengers. The Beatles operate during the sixties a musical reborn, which allowed to the people the discussion and the reflexion about the World and the human being new behavior,endurance but acting with tolerance. Permeating the basic study, we find the Beatles way, the group origin, the fast walk till success, the spiritual choice, who guide their behavior and the end of the band. The music used as a masscomp instrument passes by the condition of a simple way of communicating. It deeply action feeds feelings, allows transcendence and is showed as target of human being transformation. The Ethics in music passes by the ideological barriers and becomes to comprehension with a clear synthony for the man, cause the polyphony and the new musical order establish the messages worldwide

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This work aims to present a systematic study of sociology developed by Josué de Castro. It is a theoretical work that aims to evidence the potentialities and limitations of the hunger analysis theoretical models of contemporary sociology. It was used concepts of Social Institution (Berguer and Bourdieu), Habitus-precário and Ralé (Jessé Sousa) as weapons to comprehend better the hunger phenomenon on the sociology field, to consequently generate dialogs between Castros writings and the contemporary sociology. It demonstrates how hunger reproduces more by pre reflexive behavior patterns in a way that the moral rules become invisible and allow the phenomenon to continue in an invisible way

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En la interface de las Ciencias Sociales y de la Comunicación, la tesis expone una discusión sobre la Comunicación Social como área de conocimiento y discute las bases fenomenológicas de la producción de significado utilitario sobre el mundo. Para dar cuenta de esa reflexión se tiene como referencia la película Slumdog Millionaire? del director Danny Boyle. La experiencia vivida por el personaje principal llamado Jamal Malik sirve de apoyo a su éxito en un programa de TV cuyos desafíos consigue vencer uno a uno y transformarse en un millonario. El film, y en consecuencia la trayectoria de Jamal, es el operador cognitivo para que se presente la estrategia del personaje que transforma su conocimiento experimental en conocimiento pertinente, objetivo. La investigación sirve de base para ofrecer el argumento central de que solo existe conocimiento por medio de la experiencia vivida. A partir de esa concepción, la comunicación es vista en este ensayo como entrecruzamiento de caminos y nudos que se asemejan a un rizoma donde cada construcción de sentido, cada palabra que gana significación representa diversos enlaces de esos nudos sistémicos. Aseguramos que la comunicación es una condición sine qua non a los humanos y puede ser comprendida por la paradoja natural-artificial. Es de esta paradoja, que presentamos una contribución de la complejidad de la comunicación creyendo de forma dialógica que sí, hay una condición innata de la comunicación (y así mismo post humana) concomitantemente con la hipótesis de la artificialidad comunicacional. Corroboramos así, la idea de que el conocimiento fenomenológico de la comunicación es un juego de la construcción científica y, por lo tanto, un juego de la humanidad. En este mismo juego podemos comprender la comunicación por intermedio de algunos macro conceptos de la compleja actividad de comunicar (retroalimentación, recursividad y holograma) constelando así una estrategia de ligazón/estímulo/respuesta que nos permite conocer bien y saber organizar mejor el conocimiento adquirido en la práctica. La tesis tiene como interlocutores principales Claude Lévi-Strauss, Edgar Morin, Jean-Marie Pelt, Norval Baitello Junior y Vilém Flusser, entre otros