ABSTRACT
Abstract Background: Vitiligo is a chronic disease characterized by the appearance of achromic macules caused by melanocyte destruction. Surgical treatments with melanocyte transplantation can be used for stable vitiligo cases. Objectives: To evaluate treatment response to the autologous transplantation of noncultured epidermal cell suspension in patients with stable vitiligo. Methods: Case series study in patients with stable vitiligo submitted to noncultured epidermal cell suspension transplantation and evaluated at least once, between 3 and 6 months after the procedure, to observe repigmentation and possible adverse effects. The maximum follow-up period for some patients was 24 months. Results: Of the 20 patients who underwent 24 procedures, 25% showed an excellent rate of repigmentation, 50% good repigmentation, 15% regular, and 10% poor response. The best results were observed in face and neck lesions, while the worst in extremity lesions (88% and 33% of satisfactory responses, respectively). Patients with segmental vitiligo had a better response (84%) compared to non-segmental ones (63%). As side effects were observed hyperpigmentation of the treated area and the appearance of Koebner phenomenon in the donor area. Study limitations: Some limitations of the study included the small number of patients, a subjective evaluation, and the lack of long-term follow-up on the results. CONCLUSION: Noncultured epidermal cell suspension transplantation is efficient and well tolerated for stable vitiligo treatment, especially for segmental vitiligo on the face and neck.
Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Vitiligo/surgery , Keratinocytes/transplantation , Melanocytes/transplantation , Transplantation, Autologous , Treatment OutcomeABSTRACT
Vitiligo is a dermatosis requiring complex treatment. In clinically stable cases, melanocyte autologous grafting has shown good results, using different methodologies for obtaining the donor area: dermatomes, punches, blisters. However, these techniques are complex and require specific instruments. This study presents a simple technique for melanocyte harvest that has been performed in our service for more than ten years and includes epidermal curettage of the donor area, grafting of the obtained material, which was homogenized with saline or hyaluronic acid, on the achromic area, and the application of a semipermeable dressing that is removed 1 week later.
Subject(s)
Humans , Curettage/methods , Melanocytes/transplantation , Skin Transplantation/methods , Tissue and Organ Harvesting/methods , Vitiligo/surgery , Bandages , Transplantation, Autologous , Treatment OutcomeABSTRACT
There are many alternatives to treat vitiligo, including surgical procedures, which are recommended for patients resistant to other therapies. The melanocyte/keratinocyte transplantation consists in the separation of epidermal cells obtained from a donor site and spreading these cells on the depigmented and dermabraded recipient area. Two patients were submitted to transplantation, showing more than 70% repigmentation in the treated areas after four months, both with excellent degree of satisfaction. The method requires some laboratory skills, but represents a simple and safe procedure.
Existem várias alternativas para o tratamento do vitiligo, incluindo procedimentos cirúrgicos, que são indicados para pacientes refratários aos outros tipos de tratamento. O transplante de suspensão celular de melanócitos/queratinócitos consiste na separação de células da epiderme obtidas de área doadora, e aplicação destas células na área receptora despigmentada, após dermoabrasão. Dois pacientes com vitiligo estável foram submetidos ao transplante de suspensão de melanócitos/queratinócitos, apresentando repigmentação acima de 70% nas áreas tratadas após quatro meses, ambos com excelente grau de satisfação. O método requer alguma habilidade laboratorial, mas representa um procedimento simples e seguro.
Subject(s)
Adult , Humans , Male , Middle Aged , Facial Dermatoses/surgery , Keratinocytes/transplantation , Melanocytes/transplantation , Skin Transplantation/methods , Vitiligo/surgery , Patient Satisfaction , Treatment OutcomeABSTRACT
O piebaldismo é uma genodermatose rara onde as lesões acrômicas não respondem aos tratamentos tópico e fototerápico. Este artigo tem como objetivo demonstrar a importância do transplante de melanócitos, usando a técnica de minigrafting no tratamento do piebaldismo.
Piebaldism is a rare genodermatosis in which depigmented skin areas are unresponsive to topical or light treatment. This article describes the importance of transplant techniques using noncultured melanocytes (minigrafting) in the treatment of piebaldism.
Subject(s)
Adult , Humans , Male , Melanocytes/transplantation , Piebaldism/surgeryABSTRACT
Introdução: As cicatrizes hipocrômicas pós-queimadura são um problema frequente, quecausa aos pacientes constrangimento social e sofrimento psicológico, uma vez que podemser bastante evidentes, graças aos contrastes de cores de pele que surgem ao seu redor (diferentestons de pele entre a pele normal e a área vizinha à cicatriz - normalmente hipercrômica,e a cicatriz pós-queimadura, hipocrômica). As opções de tratamentos atuais para talproblema não são muito eficientes; estão hoje disponíveis: a maquiagem que apresenta oinconveniente de sair com o passar das horas, ou a tatuagem, que muitas vezes não acompanhao tom da pele normal. Método: Neste trabalho, utilizamos epitélios de queratinócitosautólogos cultivados in vitro como veículo de transporte de melanócitos funcionantes parao tratamento dessas áreas cicatriciais hipocrômicas resultantes de queimaduras. Estes epitélioscultivados serviram como instrumento para a repopulação definitiva destas áreas comcélulas produtoras de pigmento melânico. O método empregado incluiu o cultivo in vitro deepitélios autólogos constituídos por queratinócitos e melanócitos funcionantes, a abrasãosuperficial das áreas a serem tratadas, objetivando a remoção de epiderme hipocrômica, eo transplante dos enxertos autólogos cultivados. Resultados: Os resultados obtidos com aintegração destes epitélios cultivados, ou seja, a restauração e a repigmentação das áreashipocrômicas, foram avaliados por meio do uso de tabelas colorimétricas e biópsias, que demonstrarama repigmentação das cicatrizes e a persistência dos melanócitos transplantados.
Background: Post-burn hypochromic scars can be the subject of great personal sufferingto their victims. Due to the color contrast between the normal and affected skins, they arevisible lesions that embarrass the injured subjects and limit their social performance. Theavailable treatment options in the present days are insufficient, and tend to evolve withpoor results. Methods: We present in this paper the use of in vitro cultivated keratinocyteepithelium as a vehicle for the transplantation of working melanocytes to repopulate thesehypochromic areas in four patients. Results: The results were evaluated with the use of colortables and skin biopsies that allowed us to clearly demonstrate the partial repigmentationof the scar areas and the integration of the transplanted melanocytes. The repigmented skinaverage after 3 and 6 months of the procedure was of 30.52% and 51.66%, respectively. Ifwe consider the low-morbidity of the procedure, these results are already very encouraging,but we strongly believe that technical refinements could allow even better results.
Subject(s)
Humans , Female , Adult , Burns , Cells, Cultured , Cicatrix , Keratinocytes , Epithelium , In Vitro Techniques , Melanocytes/transplantation , Transplantation, Autologous , Histological Techniques , Methods , Methods , Diagnostic Techniques and ProceduresABSTRACT
BACKGROUND: Replenishing melanocytes selectively in vitiliginous macules by autologous melanocytes is a promising treatment. With expertise in culturing melanocytes, it has now become possible to treat larger recipient areas with smaller skin samples. AIM: To study the extent of repigmentation after autologous melanocyte transplantation in patients with stable vitiligo. METHODS: The melanocytes were harvested as an autologous melanocyte rich cell suspension from a donor split thickness graft. Melanocyte culture was performed in selected cases where the melanocyte cell count was insufficient to meet the requirement of the recipient area. These cells were then transplanted to the recipient area that had been superficially dermabraded. RESULTS: An excellent response was seen in 52.17% cases with the autologous melanocyte rich cell suspension (AMRCS) technique and in 50% with the melanocyte culture (MC) technique. CONCLUSION: Autologous melanocyte transplantation can be an effective form of surgical treatment in stable but recalcitrant lesions of vitiligo.