Injeções intradermicas de colageno e suas implicações na matriz extracelular

AUTOR(ES)
DATA DE PUBLICAÇÃO

1987

RESUMO

In the present work the extracellular matrix responses to intradermic heterologous collagen injections and the evaluation of the effects of the injected material physically and chemically treated were studied. Mice were injected with type 1 bovine collagen (gel, gel formolized and lyophyllized collagen solutions) and sacrificed at different intervals of time thereafter. The histologic preparations were processed and a series of routine and citochemical techniques and microscope observations were performed. The tissue reaction to the implanted material in all treatment cases was outlined by neutrophil lnvasion, followed by the macrophage and fibroblasts, and afterwards by glycosamlnoglycans and collagen synthesis phase, wlth further vascularization process of the implant and tissue remodeling. No toxicity signs or immune reaction to the heterologous collagen dermic implants was verified. The radiation and the vigorous mechanical shaking treatments in the case of lyophyllized collagen resulted in a higher susceptibllity to degradation of collagen. The formaldehyde treatment resulted in enzimatic attack resistent collagen, although the implant elasticity was lost. The increase of mast cells number in the implant surroundings was detected by the 30th. day, suggesting their participation in the remodeling process of the neonate tissue. Regarding the molecular organization, the increase of the implant birefringence was noted, probably due to the fibers realignment and to the collagen glycosaminoglycans hinding in the interior of the implanted material

ASSUNTO(S)

matriz extracelular injeções intradermicas colageno

ACESSO AO ARTIGO

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