Navegando por Palavras-chave "Amniotic membrane"

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    Comparação entre membrana amniótica com e sem epitélio como substrato para cultura de células epiteliais do limbo ex vivo
    (Conselho Brasileiro de Oftalmologia, 2011-04-01) Covre, Joyce Luciana [UNIFESP]; Loureiro, Renata Ruoco [UNIFESP]; Cristovam, Priscila Cardoso [UNIFESP]; Ricardo, José Reinaldo da Silva [UNIFESP]; Freymüller-Haapalainen, Edna [UNIFESP]; Gomes, José Álvaro Pereira [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    PURPOSE: To evaluate the efficacy and ultrastructural aspects of human limbal epithelial cells cultured on amniotic membrane (AM) with and without epithelium. METHODS: Limbal epithelial cell cultures were established from cadaveric cor neo-scleral rim explants derived from 6 different donors. The explants from each donor were placed under 3 different groups: on human preserved AM with epithelium (Group 1), AM deepithelialized with trypsin (Group 2) and control (Group 3). The epithelial cell migration was evaluated under phase contrast microscopy. After 15 days, the amniotic membrane with cells cultures were removed and submitted to scanning and transmission electron microscopy to check for epithelial migration and adhesion. RESULTS: All epithelial cell cultures from the controls grew over the botton of the culture plate wells until reaching confluence. Epithelial cultures grew over all but one denuded amniotic membrane. In the group amniotic membrane with epithelium, epithelial cell growing was observed only in 1 well. CONCLUSIONS: Using this model, denuded amniotic membrane appeared to be the best substrate for epithelial cell migration and adhesion comparing to amniotic membrane with epithelium. Removal of amniotic membrane epithelial seems to be an important step for establishing limbal epithelial cell culture on amniotic membrane.
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    Membrana amniótica nas cirurgias reconstrutivas da superfície ocular nas ceratoconjuntivites cicatriciais
    (Conselho Brasileiro de Oftalmologia, 1999-10-01) Gomes, José Álvaro Pereira [UNIFESP]; Komagome, Ciro M. [UNIFESP]; Santos, Namir [UNIFESP]; Chaves, Alessandra P. [UNIFESP]; Cunha, Marcelo C. [UNIFESP]; Freitas, Denise de [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Purpose: Amniotic membrane has been consolidated as an useful adjunct in the treatment of ocular surface disorders. Its use is based on the ability to improve epithelial healing and to decrease inflammatory, angiogenic and cicatricial processes. The purpose of this study was to report the surgical outcome of human amniotic membrane use for surface reconstruction in ocular cicatricial diseases. Methods: Amniotic membrane was obtained at the time of cesarean section and was preserved at -80ºC in glycerol and cornea culture media at a ratio of 1:1. Eleven eyes of 10 patients underwent amniotic membrane transplantation, associated (8 eyes) or not (3 eyes) with corneal limbal graft. Ocular surface reconstruction was performed after chemical burns (6 eyes), trauma (1 eye) and Stevens-Johnson's syndrome (SJS) (4 eyes). Results: Mean follow-up time was 5.22 months (range, 2-13 months). One case of SSJ developed early postoperative infection and was excluded from the analysis. Successful ocular surface reconstruction was achieved in 8 eyes (80%). Surgical failure was observed in 2 cases of SJS who presented corneal melting at the time of surgery (20%). Conclusions: This study suggests that amniotic membrane transplantation is an effective alternative for surface reconstruction in stable ocular cicatricial diseases. Larger studies with longer follow-up are necessary to further analyse this procedure.
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    Transplante de membrana amniótica
    (Conselho Brasileiro de Oftalmologia, 2000-08-01) Moreira, Hamilton [UNIFESP]; Oliveira, Cinara S. De; Universidade Federal de São Paulo (UNIFESP); Universidade Federal do Paraná; Faculdade Evangélica de Medicina do Paraná; Hospital de Olhos do Paraná
    Amniotic membrane transplantation has been used as an alternative for ocular surface reconstruction. Indications for amniotic membrane transplantation include persistent epithelial defects, pterygium, Stevens-Johnson syndrome, ocular cicatricial pemphigoid, chemical burns and pseudo-phakik bullous keratopathy.