ABSTRACT
INTRODUCTION: Burns are defined as a traumatic injury, usually of thermal origin, that affects the epithelial and adjacent tissue and is classified according to the depth reached. Tissue repair involved in this type of injury is often a challenge both due to its severity and the multiplicity of complications. Regenerative medicine has focused on the use of low-level laser photobiomodulation therapy (LLLT) and adipose-derived stem cells (ADSC), especially in the early stages of the process, to promote better healing and shorten repair time. Therefore, aim of this study was to evaluate the action of LLLT (660 nm) and ADSC in the repair process of burned skin tissue and investigate the association of the techniques (LLLT and ADSC). MATERIALS AND METHODS: An in vivo study was carried out using 96 rats (Wister) with a scald burn model at a temperature of 95ºC, exposing the animal's back for 14 s. Animals were randomized into seven groups and three periods, five, 14 and 21 days. The groups included GC: Control group, ADSC-: Group treated with CD49d negative cells, ADSC+ : Group treated with positive CD49d cells, CULT: Group treated with conventional isolation cells, LLLT: Group treated only with LLLT Low Power Laser, ADSC-LLLT: Group treated with CD49d negative cells and LLLT. ADSC+LLLT: Group treated with positive CD49d cells and LLLT. The groups treated with LLLT (660 nm; 5 J/cm2) received irradiation three times a week, on alternate days for five, 14 and 21 days, according to the time of biopsy. ADSC-treated groups received one to three applications of the cells in a total volume of 1000 µL starting soon after the surgical debridement of the burn. Photographic monitoring was carried out at 5, 14 and 21 days after the beginning of the experiment to assess the degree of lesion contraction. Macroscopic, morphometric and histopathological analyzes were performed. RESULTS: We showed significant re-epithelialization as well as an improvement in the healing process in the ADSC+, LLLT and ADSC+LLLT groups. We observed effects in the reduction of the inflammatory phase, increase in angiogenesis, decrease in oedema, greater collagen deposition, and better organization of the extracellular matrix compared to the other treatments. Moreover, the immunomagnetic separation of ADSC cells through the expression of the CD49d protein proved to be a useful means to obtain a more homogeneous population of cells with a role in tissue regeneration compared to the ADSC- and CULT groups. CONCLUSION: In conclusion, the association of ADSC+ with LLLT was effective in accelerating the burn repair process, stimulating cell proliferation and formation of more normal skin tissue.
Subject(s)
Burns , Low-Level Light Therapy , Soft Tissue Injuries , Rats , Animals , Rats, Wistar , Burns/pathology , Skin/pathology , Wound Healing/radiation effects , Low-Level Light Therapy/methods , Stem Cells/metabolism , Stem Cells/pathologyABSTRACT
Objetivo: caracterizar as teses e dissertações disponíveis no banco de teses da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior que abordem a neoplasia mamária masculina. Método: Realizou-se uma revisão de literatura, de caráter bibliométrico, selecionando 7 estudos, por meio de check list previamente estabelecido. Resultados: Identificou-se que 85,7% dos estudos selecionados eram dissertações de mestrado, publicadas entre 2007 e 2019. A maioria foi produzida na Universidade de São Paulo (42,8%). Quanto à publicação de artigos originados das teses e dissertações, 71,4% dos autores não publicaram. Conclusão: embora os métodos de diagnóstico do câncer de mama tenham avançado, a produção científica sobre o câncer de mama masculino ainda se faz incipiente no Brasil. Esse é um dado importante que pode auxiliar na elaboração de novos trabalhos, objetivando um melhor atendimento e prognóstico nesses pacientes.
Objective: to characterize the theses and dissertations available in the theses bank of the Coordination for the Improvement of Higher Education Personnel that address male breast cancer. Method: A bibliometric literature review was carried out, selecting 7 studies, using a previously established checklist. Results: We identified that 85.7% of the selected studies were master's theses, published between 2007 and 2019. Most were produced at the University of São Paulo (42.8%). As for the publication of articles originating from theses and dissertations, 71.4% of the authors did not publish. Conclusion: although methods for diagnosing breast cancer have advanced, scientific production on male breast cancer is still incipient in Brazil. This is an important fact that can help in the development of new studies, aiming at better care and prognosis for these patients.
Objetivo: caracterizar tesis y disertaciones disponibles en el banco de tesis de la Coordinación de Perfeccionamiento del Personal de Educación Superior que abordan el cáncer de mama masculino. Método: Se realizó una revisión bibliométrica de la literatura, seleccionando 7 estudios a través de un checklist previamente establecido. Resultados: Se identificó que el 85,7% de los estudios seleccionados fueron tesis de maestría, publicadas entre 2007 y 2019. La mayoría fueron producidos en la Universidad de São Paulo (42,8%). Cuanto la publicación de artículos provenientes de tesis y disertaciones, el 71,4% de los autores no publicó. Conclusión: aunque los métodos de diagnóstico del cáncer de mama han avanzado, la producción científica sobre el cáncer de mama masculino es aún incipiente en Brasil. Este es un hecho importante que puede ayudar en el desarrollo de nuevos estudios, con el objetivo de mejorar la atención y el pronóstico de estos pacientes.