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Master's Dissertation
DOI
https://doi.org/10.11606/D.5.2007.tde-10122007-152926
Document
Author
Full name
Fabio Kamamoto
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2007
Supervisor
Committee
Herson, Marisa Roma (President)
Gomez, David de Souza
Mathor, Monica Beatriz
Title in Portuguese
Contração de feridas: revisão bibliográfica e estudo da contração gerada por fibroblastos normais e de quelóides
Keywords in Portuguese
Cicatrização
Colágeno
Fator transformador beta
Fibroblasto
Quelóide
Abstract in Portuguese
A organização de fibras de colágeno no leito de uma ferida é componente importante da cicatrização e contração da ferida, determinando em última instância a qualidade final da cicatriz. Neste estudo realizamos a implantação de modelo de biotecnologia constituído de géis de colágeno povoados por fibroblastos humanos, que foi utilizado como instrumento para a melhor compreensão dos fenômenos ainda pouco elucidados, envolvidos na contração de feridas. Utilizando fibroblastos procedentes de pele normal ou quelóides, observou-se maior contração dos géis povoados por fibroblastos oriundos de quelóide. O modelo implementado foi considerado eficiente para a avaliação da presença de moduladores da fase de remodelação da cicatriz, tais como o Fator de Crescimento Transformador Beta (TGF beta). A comparação entre a curva de contração gerada por fibroblastos oriudos de pele normal sob o efeito do TGF beta e a contração gerada por fibroblastos de quelóides, demonstra que as mesmas apresentam comportamento igual do ponto de vista estatístico. O modelo proposto demonstrou ser adequado para a melhor compreensão dos mecanismos responsáveis pela contração de feridas, bem como possui potencial na avaliação de novas drogas capazes de modular este fenômeno
Title in English
Wound contraction: literature review and experimental model for the study of the contraction generated by normal and keloid fibroblasts
Keywords in English
Collagen
Fibroblast
Keloid
Transforming growth factor beta
Wound healing
Abstract in English
An important component of tissue healing and wound contraction is the re-arrangement of ground collagen fibers, which can ultimately influence the final quality of scars. In this study we used a biotechnology experimental model with contracting collagen gels seeded with human fibroblasts in order to better understand the phenomena involved in wound contraction. We compared the contraction of the collagen gels using fibroblasts from normal skin and from keloids, and we observed that the collagen gels seeded with keloid fibroblasts suffered a bigger contraction. The model was considered efficient to test growth factors with the potential to modulate the remodeling phase of the scar, for example, the Transforming Growth Factor Beta (TGF beta). The analysis of the changing macroscopic gel area comparing the contraction generated by the normal fibroblasts after the treatment with TGF beta with the contraction in the gels with keloid's fibroblasts showed that they have the same behavior. The experimental model proved to be an useful tool to better understand the wound contraction and to test new drugs to modulate this phenomenon.
 
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FabioKamamoto.pdf (755.30 Kbytes)
Publishing Date
2008-01-17
 
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