Análise comparativa de diferentes metodologias para cultivo de células-tronco mesenquimais derivadas de tecido muscular
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Data
2014-07-29
Autores
Marques, Lais Fernanda [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
As pesquisas com células-tronco têm avançado expressivamente e ocupam um papel de destaque no contexto do novo ramo terapêutico que se convencionou denominar de medicina regenerativa. A abundância e facilidade de obtenção do tecido muscular têm permitido a ampliação dos estudos acerca de seu potencial como fonte de células-tronco mesenquimais. Neste sentido, diferentes metodologias têm sido propostas para a obtenção de células-tronco mesenquimais oriundas do tecido muscular (CTDM), objetivando cultivo e aplicação clínica em medicina humana e veterinária. Um aspecto importante a ser considerado nos diversos protocolos de isolamento de células-tronco mesenquimais refere-se ao emprego rotineiro da colagenase de origem bacteriana (Clostridium histolyticum). O emprego de reagentes xenobióticos, como a colagenase, rotineiramente empregados, obedecem às recomendações da Agência Nacional de Vigilância Sanitária (ANVISA - Brasil), que preconiza a não utilização desses produtos no cultivo de células destinadas à terapia celular em pacientes humanos, uma vez que podem conter agentes infecciosos e contaminantes capazes de desencadear severas reações imunológicas. Neste contexto, objetivou-se, neste estudo, a proposição de novas metodologias a fim de substituir o emprego de xenobióticos no processo de obtenção CTDM. Para tanto, foram comparados os métodos de digestão enzimática (colagenase), dissociação mecânica e explante, em diferentes meios de cultura. O conjunto de resultados mostra que as técnicas de dissociação mecânica e explante são metodologias...
The researches with stem cells have advanced significantly and take a prominent role in the context of the new treatment branch that has been conventionally called of regenerative medicine. The abundance and ease of obtaining muscle tissue have allowed the expansion of studies on its potential as a source of mesenchymal stem cells. In this sense, different methodologies have been proposed for obtaining mesenchymal stem cells derived of muscle tissue (SCDM), aiming cultivation and clinical application in human and veterinary medicine. An important aspect to be considered in the various protocols of isolation of mesenchymal stem cells refers to the routine use of bacterial collagenase (Clostridium histolyticum). The use of xenobiotic reagents, such as collagenase, contrasts with the recommendations of the National Health Surveillance Agency (ANVISA - Brazil), which recommends the avoidance of the use of these products in the cultivation of cells destined for cell therapy in human patients, since which may contain infectious agents and contaminants that are capable of triggering severe immunological reactions. In this context, we aimed in this study to propose new methods to replace the use of xenobiotics in the process of obtaining SCDM. For this end, the methods of enzymatic digestion (collagenase), mechanical dissociation and explant were compared in different culture media. The set of results shows that the techniques of mechanical dissociation and explant are viable methodologies for replacement of collagenase procedures for obtaining SCDM. These new methodological...
The researches with stem cells have advanced significantly and take a prominent role in the context of the new treatment branch that has been conventionally called of regenerative medicine. The abundance and ease of obtaining muscle tissue have allowed the expansion of studies on its potential as a source of mesenchymal stem cells. In this sense, different methodologies have been proposed for obtaining mesenchymal stem cells derived of muscle tissue (SCDM), aiming cultivation and clinical application in human and veterinary medicine. An important aspect to be considered in the various protocols of isolation of mesenchymal stem cells refers to the routine use of bacterial collagenase (Clostridium histolyticum). The use of xenobiotic reagents, such as collagenase, contrasts with the recommendations of the National Health Surveillance Agency (ANVISA - Brazil), which recommends the avoidance of the use of these products in the cultivation of cells destined for cell therapy in human patients, since which may contain infectious agents and contaminants that are capable of triggering severe immunological reactions. In this context, we aimed in this study to propose new methods to replace the use of xenobiotics in the process of obtaining SCDM. For this end, the methods of enzymatic digestion (collagenase), mechanical dissociation and explant were compared in different culture media. The set of results shows that the techniques of mechanical dissociation and explant are viable methodologies for replacement of collagenase procedures for obtaining SCDM. These new methodological...
Descrição
Palavras-chave
Células-Tronco, Tecidos (Anatomia e fisiologia), Dissociação, Enzimas digestivas, Stem cells
Como citar
MARQUES, Lais Fernanda. Análise comparativa de diferentes metodologias para cultivo de células-tronco mesenquimais derivadas de tecido muscular. 2014. 84 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Filosofia, Ciências e Letras de Assis, 2014.