Avaliação da intervenção terapêutica com produto natural na cicatrização de ferida cutânea: o uso de óleo de capivara

• Autor(a) principal: Marinho, Polyana Cury
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/12749
• topic: Healing; cutaneous wound; capybara oil; reepithelialization; extracellular matrix; Cicatrização; feridas cutâneas; óleo de capivara; reepitelização; matriz extracelular; CNPQ::CIENCIAS BIOLOGICAS::MORFOLOGIA

The cutaneous wound healing aims to restore the integrity of the skin, aiming a quick closing of the lesion and a functional and aesthetically satisfying scar formation. Several in vivo models have been studied to characterize different components and mechanisms involved in tissue repair and evaluate the effects of potential therapeutic compounds which accelerate the healing process. The oil extracted from the subcutaneous fat of capybara has certain properties, among them is its use in external injuries in order to accelerate the healing process, although this event is not confirmed by experimental research. The present study aimed to investigate the possible effects of topical application of capybara oil in cutaneous wounds induced in Swiss mice, assessing their macro and microscopic interference in the process of wound healing. Lesion was created on the backs of animals which received topical application of capybara oil (0,1 ml) during 3, 7, 14 and 21 days postoperatively (PO), according to established protocol. At the end of the days, euthanasia of animals was performed, lesions and adjacent skin fragments were collected and processed for light microscopy. Sections were stained with hematoxylin-eosin, toluidine blue, picro sirius red, Weigert´s resorcin fuchsin, and immunostained for proliferating cell nuclear antigen. Were examined macroscopically the general appearance of the lesion, wound contraction and reepithelialization, and microscopically the neoepidermis thickness, amount of polymorphonuclear (PMN) leukocytes and mast cells, cell proliferating in the epidermis and dermis, and evaluation of collagen and microfibril-elastin fibers system in extracellular matrix (ECM) of dermal scarring. The animals treated topically with capybara oil showed, compared to control group that received no treatment, better development of fibrin crust in the early stages of healing and your disappearance before 14th PO day; higher contraction and reepithelialization of the lesion area, as well as neoepidermis thicker in 7 days PO; increase in PMN leukocytes in 3 days PO and its gradual reduction in subsequent days and reduced number of mast cells in 21 days PO. Furthermore, was observed in the group treated with capybara oil a beneficial modulation of collagen and elastic fibers present in the dermis ECM, presenting accelerating type I collagen fibers deposition and better organization of these fibers, as well as accelerating elastogenesis with emergence of microfibril-elastin fibers system from 7th PO day. The present study showed that topic employment of capybara oil in cutaneous wound on mice interfere favorably in the healing process, accelerating wound closure and repair of the epidermis and dermis