185 resultados para Adjuvante
Resumo:
Objetivos: Analisar dados demográficos, apresentação clínica, fatores de risco, opções terapêuticas e sobrevida de doentes com adenocarcinoma nasossinusal. Material e Métodos: Estudo retrospetivo de doentes com Adenocarcinoma Nasossinusal tratados entre 2000 e 2014, no IPOFGL. Resultados: Identificamos 33 doentes com diagnóstico de Adenocarcinoma. A idade média foi de 65.6 anos. A terapêutica mais comum foi cirurgia com radioterapia adjuvante. A sobrevida global e livre de doença aos 3 anos foi de 57.6% e 40.5%. A invasão do seio esfenoidal (p=0.038) e da base do crânio (p=0.003) influenciaram a sobrevida global. O desenvolvimento de metástases à distância teve impacto sobre a sobrevida livre de doença (p=0.01). Conclusões: Os Adenocarcinomas são tumores raros. A excisão da lesão toma um papel determinante no tratamento dos doentes. Na nossa amostra, a invasão do seio esfenoidal, da base do crânio e o desenvolvimento de metástases à distância estão associados a um pior prognóstico.
Resumo:
Introdução: A doença de Behçet é uma vasculite inflamatória sistémica, de etiologia desconhecida, caraterizada por episódios de recidiva de úlceras orais e genitais, lesões oculares e cutâneas, podendo atingir virtualmente todos os sistemas. As manifestações oculares são comuns e com consequências visuais importantes. O objectivo deste trabalho foi analisar os parâmetros demográficos, manifestações clinicas, terapêutica e principais complicações em doentes com doença de Behçet ocular. Métodos: Estudo descritivo e retrospetivo, que incluiu 11 doentes com o diagnóstico de doença de Behçet, segundo os critérios do ISG, observados na consulta de Inflamação Ocular do Hospital Prof. Doutor Fernando da Fonseca nos últimos 3 anos. Resultados: Identificaram-se 11 doentes, 5 homens e 6 mulheres, todos caucasianos. A idade média ao diagnóstico foi de 33,45±6,49 anos. A manifestação ocular foi o primeiro sinal da doença em 2 doentes. Em 72,7% dos casos as manifestações oculares foram bilaterais. Identificaram-se 4 casos de panuveíte, 3 de uveíte posterior, 2 de uveíte anterior, 1 de queratite e 1 caso de episclerite. O glaucoma e a catarata foram a complicação ocular mais frequente. O tratamento sistémico incluiu a corticoterapia oral em associação com terapêutica adjuvante imunossupressora, sendo os mais utilizados a azatioprina e a ciclosporina. Em 3 doentes houve necessidade de terapêutica biológica com infliximab para controlo da doença. Conclusão: A manifestação ocular mais frequente foi a panuveite. Esta doença pode condicionar complicações oculares com diminuição irreversível da acuidade visual. A orientação destes doentes exige uma abordagem global e inter-disciplinar.
Resumo:
Betalains are plant derived natural pigments that are presently gaining popularity for use as natural colorants in food industry. Although being betalains from red beetroot already used as food colorant (E- 162), these compounds are not as well studied as compared to other natural pigments such as anthocyanins, carotenoids or chlorophylls (I]. Since food additives are on the focus of public interest, it is becoming increasingly important to meet consumers' expectations for natural and healthy products. Hence, the search for new plant-derived colorants for the food industry is still necessary [2]. Betalains were originally called 'nitrogenous anthocyanins', which incorrectly implied structural similarities between the two pigment classes. There are two structurally different types of betalains: the yellow/orange betaxanthins which are the condensation products of betalamic acid and assorted amino compounds, and the red betacyanins which are formed by glycosylation and acylation of cyclo-DOPA [3]. Looking at the chemical structure of the pigment, the addition of an acid to the extraction solvent will increase the affinity of the pigment with the solvent. The aim of this study was to use Gomphrena globosa L. flowers, as an alternative plant source to obtain these pigments and to evaluate the best acid to be used within the extraction procedure. For that purpose three different acids (acetic, hydrochloric and phosphoric acids, all ofthem allowed by the food industry), adjusted at the same pH, were tested during a maceration extraction procedure. After the extraction a purification through C18 column was performed in order to obtain a more concentrate extract in betacyanins. The results were analysed by HPLC-PDA-MSIESI. The betacyanin profile allowed the identification of gomphrenin IIJIII and isogomphrenin IIIIII and the best results were achieved by performing the extraction procedure using hydrochloric acid (6.6 mg/g extract), while phosphoric acid only presented trace amounts of these compounds. When acetic acid was used, the pigment extracted was 6.8 times less (0.97 mg/g extract) when compared to HCI. In conclusion hydrochloric acid can be considered the most suitable acid to be applied in the extraction procedure of these pigments.
Resumo:
Despite advances in antibiotic therapy, bacterial meningitis (BM) remains with high mortality and morbidity rates in worldwide. One important mechanism associated to sequels during disease is the intense inflammatory response which promotes an oxidative burst and release of reactive oxygen species, consequently leading to cell death. Activation of DNA repair enzymes during oxidative stress has been demonstrated in several neurological disorders. APE1/Ref-1 is a multifunctional protein involved in DNA repair and plays a redox function on transcription factors such as NFkB and AP-1.The aim of this study was assess the role of APE1/Ref-1 on inflammatory response and the possibility of its modulation to reduce the sequels of the disease. Firstly it was performed an assay to measure cytokine in cerebrospinal fluid of patients with BM due to Streptococcus pneumoniae and Neisseriae meningitides. Further, a cellular model of inflammation was used to observe the effect of the inhibition of the endonuclease and redox activity of APE1/Ref-1 on cytokine levels. Additionally, APE1/Ref-1 expression in cortex and hippocampus of rat with MB after vitamin B6 treatment was evaluated. Altogether, results showed a similar profile of cytokines in the cerebrospinal fluid of patients from both pathogens, although IFNy showed higher expression in patients with BM caused by S. pneumoniae. On the other hand, inhibitors of APE1/Ref-1 reduced cytokine levels, mainly TNF-α. Reduction of oxidative stress markers was also observed after introduction of inhibitors in the LPS-stimulated cell. In the animal model, BM increased the expression of the protein APE1/Ref-1, while vitamin B6 promoted reduction. Thereby, this data rise important factors to be considered in pathogenesis of BM, e.g., IFNy can be used as prognostic factor during corticosteroid therapy, APE1/Ref-1 can be an important target to modulate the level of inflammation and VIII oxidative stress, and vitamin B6 seems modulates several proteins related to cell death. So, this study highlights a new understanding on the role of APE1/Ref-1 on the inflammation and the oxidative stress during inflammation condition
Resumo:
Apesar de não haver relatos de quebra na produtividade, a soja geneticamente modificada (RR) pode apresentar sintomas de injúrias ao glifosate dependendo, dentre outros, de fatores ambientais, formulação e doses. Ensaios preliminares indicaram a possibilidade da ocorrência de injúrias na soja RR devido à presença do adjuvante aminado presente nas formulações comerciais. Neste trabalho verificou-se a ocorrência de injúrias em plântulas de soja RR frente a diferentes formulações de glifosate, variando quanto ao seu sal e à presença do adjuvante aminado na formulação comercial. Os resultados confirmaram ser esse composto o responsável pelas injúrias observadas nas plântulas de soja RR tratadas com as diferentes formulações.