512 resultados para Reativação do inibidor


Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dissertação de Mestrado, Engenharia Biológica, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2014

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dissertação de Mestrado, Ciências Biomédicas, Departamento de Ciências Biomédicas e Medicina, Universidade do Algarve, 2013

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dissertação de Mestrado, Ciências Biomédicas, Departamento de Ciências Biomédicas e Medicina, Universidade do Algarve, 2014

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dissertação de Mestrado, Oncobiologia, Departamento de Ciências Biomédicas e Medicina, Universidade do Algarve, 2016

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dissertação de Mestrado, Oncobiologia: Mecanismos Moleculares do Cancro, Departamento de Ciências Biomédicas e Medicina, Universidade do Algarve, 2016

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dissertação de mest. em Biotecnologia, Departamento de Química e Bioquímica da Faculdade de Ciêicias e Tecnologia, Univ. do Algarve, 2004

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dissertação (mestrado)—Universidade de Brasília, Faculdade em Ciências da Saúde, Programa de Pós-Graduação em Ciências da Saúde, 2016.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dissertação de Mestrado, Oncobiologia – Mecanismos Moleculares do Cancro, Departamento de Ciências Biomédicas e Medicina, Universidade do Algarve, 2015

Relevância:

10.00% 10.00%

Publicador:

Resumo:

The general objective of this study was to contribute to the understanding of the chemical evolution of fluids that percolate through carbonate rocks of the Jandaíra Formation. The oxidation and reduction conditions in which grains, source and cement were formed was investigated using the cathodoluminescence technique (CL). The study area is located in the west part of the Potiguar Basin (Fazenda Belém field) and Rosário Ledge (Felipe Guerra municipality, State of Rio Grande do Norte, Brazil). The analysis of thin sections of carbonate rocks under CL revealed that grains (allochemical or not) and diagenetic products (micritization, dolomitization, neomorphism and cementation) exhibit since absence of luminescence the various luminescence colors (yellow, orange, red, brown, and blue) in a variety of intensities. As pure calcite shows dark blue luminescence, the occurrence of different luminescence colors in calcite crystals suggest one or more punctual crystal defects such as free electron, free space and impurity. The dyeing of thin sections with alizarin and potassium ferrocyanide revealed the absence of ferrous carbonate in the different lithotypes of Jandaíra Formation. Therefore, the different colors and intensities of CL observed in these rocks are probably caused by the presence of ion activators such as Mn2+ and is not an activator/inhibitor combination. In the same way, the absence of luminescence is very probably caused by the absence of activator ions and not due to the low concentration of inhibitor ions such as Fe2+. The incorporation of Mn2+ in the different members of the Jandaíra Formation must have been controlled by the redox state of the depositional environment and diagenesis. Therefore, it is possible that the luminescent members have been formed (e.g.,ooids) or have been modified (gastropod neomorphism) under reduction conditions in the depositional environments, in subsurface during the burial, or, in the case of Rosario Ledge samples , during the post-burial return to surface conditions. As regards the sudden changes from low to moderate and to strong luminescence, these features should indicate the precipitation of a fluid with chemical fluctuations, which formed the frequent zonations in the block cement of the Rosario Ledge samples. This study suggests that the different intensities and colors of CL should be correlated with the Mn2+ and Fe2+ contents, and stable isotopes of samples to determine the salinity, temperature, pH e Eh conditions during deposition

Relevância:

10.00% 10.00%

Publicador:

Resumo:

In this study, a BCR-ABL expressing human chronic myelogenous leukaemia cell line (K562) was used to investigate the antitumoral potential of a novel lectin (CvL) purified from the marine sponge Cliona varians. CvL inhibited the growth of K562 cells with an IC50 value of 70 g/ml, but was ineffective to normal human peripheral blood lymphocytes in the same range of concentrations tested (180 g/ml). Cell death occurred after 72 h of exposure to the lectin and with sign of apoptosis as analysed by DAPI staining. Investigation of the possible effectors of this process showed that cell death occurred in the presence of Bcl-2 and Bax expression, and involved a caspase-independent pathway. Confocal fluorescence microscopy indicated a major role for the lysosomal protease cathepsin B in mediating cell death. Accordingly, pre-incubation of K562 cells with the cathepsin inhibitor L-trans-epoxysuccinyl-L-leucylamido-(4-guanidino)butane (E-64) abolished the cytotoxic effect of CvL. Furthermore, we found upregulation of tumor necrosis factor receptor 1 (TNFR1) and down-modulation of p65 subunit of nuclear factor kappa B (NFB) expression in CvL-treated cells. These effects were accompanied by increased levels of p21 and downmodulation of pRb, suggesting that CvL is capable of cell cycle arrest. Collectively, these findings suggest that cathepsin B acts as death mediator in CvL-induced cytotoxicity possibly in a still uncharacterized connection with the membrane death receptor pathway

Relevância:

10.00% 10.00%

Publicador:

Resumo:

A contemporaneidade exige constantes reformulações das práticas econômicas, e nisto o território, base material das ações humanas, também é constantemente reestruturado para atender as demandas sociais advindas de novos fluxos e fixos. O presente trabalho visa identificar e compreender as dinâmicas territoriais advindas dos processos de reativação do estaleiro de São Roque do Paraguaçu, pertencente à Petrobras, para os municípios de Maragogipe e Nazaré, no Estado da Bahia, Brasil. A realização deste estudo exige a pesquisa bibliográfica, como também a coleta de dados em campo, incluindo registro fotográfico e levantamento estatístico e documental em empresas e instituições. Serão analisados documentos como o PAC – BA (Plano de Aceleração do Crescimento), Plano de Desenvolvimento Regional Sustentável e Plano Plurianual, além de aplicadas entrevistas. Essa obra promove nos municípios supracitados e circunvizinhos certa dinamização, já que movimenta o comércio, as redes de hospedagem e alimentação, gera empregos e a demanda de cursos técnicos e profissionalizantes, podendo contribuir para o desenvolvimento local.