908 resultados para Intoxicação - Tratamento - Estudos experimentais


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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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The mast cell tumor (MCT) is the second most common type of tumor in dogs. It is characterized by uncontrolled proliferation of mast cells in the skin. Treatment involves surgical resection, chemotherapy and radiotherapy. Recently, new treatment protocols have been developed, such as the use of tyrosine kinase inhibitors. With the increasing knowledge about the genome and the evolution of methods in molecular genetics, drugs with specific molecular targets are surely going to become promising therapeutic modalities in the near future. Besides being involved in the normal cell cycle, some studies suggest that tyrosine kinases have a fundamental role in neoplastic processes. Therefore, some strategies such as the development of antibodies anti-receptors for tyrosine kinases and small-molecule tyrosine kinase receptor inhibitors have been developed in an attempt to inhibit tumor development. The purpose of this review is to describe the use of tyrosine kinase inhibitors in the treatment of mast cell tumors in dogs.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Due to the large use of steel in several processes around the world, there is the increasingly concern to find new materials and/or optimization and improvement of the processes, as the need to reduce the cost and a productivity increase in the primary industry, such as the siderurgy. The rolling is the most used mechanical process in the world and therefore is required the development of new tools in high volume and with optimum characteristics to support the market demand. Forged rolls used are for rolling. These rolls have heat treatment that has the purpose to achieve the appropriated mechanical properties to support the variables of the rolling process. The objective of this work is to analyze the hardness profile and the microstructure a tool steel similar to AISI A2, forged in an opened die process and submitted to heat treatment with water-cooling. The results allowed plotting a hardness profile and performing a microstructure analysis, and whereby to confirm that the heat treatment is not a quenching, but it is a material beneficiation by the hardening of superficial layer, since there is no martensitic microstructure. Therefore, this paper provides the support to future studies about the possibility to perform enhancements in this thermal heat made in the rolls produced at Gerdau Plant in Pindamonhangaba