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Evaluation of lipoic acid topical application on rats skin wound healing

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Evaluation of lipoic acid topical application on rats skin wound healing

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Título Evaluation of lipoic acid topical application on rats skin wound healing
Autor Külkamp-Guerreiro, Irene Clemes
Souza, Marielly Nunes
Bianchin, Mariana Domingues
Isoppo, Mateus
Freitas, Joana Sachetti
Alves, João Alex
Piovezan, Anna Paula
Pohlmann, Adriana Raffin
Guterres, Silvia Stanisçuaski
Abstract PURPOSE: To evaluate the effects of lipoic acid (thioctic acid) topical application on wound healing on rats skin, and the consequences of lipoic acid nanoencapsulation on this process. METHODS: The model used was the healing activity on wounds induced by surgical incision on rats skin (n = 44). The parameters analyzed (11 days) were wound healing rate and histology (vascular proliferation, polymorphonuclear or mononuclear cells, and collagen synthesis or reepithelialization), after application of free lipoic acid or lipoic acid- loaded nanocapsules. The antioxidant activity of these formulations was evaluated by lipid peroxidation test. RESULTS: It was demonstrated for the first time that the topical application of lipoic acid improves wound healing. On the seventh day after surgery, the animals treated with lipoic acid showed increased healing rate (60.7 ± 8.4%) compared to the negative control group (43.0 ± 17.4%), as so improvement of histological parameters. The nanoencapsulation reverted the pro-oxidant activity presented in vitro by lipoic acid, whereas diminished wound repair. CONCLUSIONS: The topical application of lipoic acid produced an increase in the skin wound healing, which may be related to its pro-oxidant activity. On the other hand, the nanoencapsulation of the lipoic acid reversed the pro-oxidant activity, although presented minor healing activity.
Contido em Acta cirúrgica brasileira. São Paulo. Vol. 28, n. 10 (2013), p. 708-715
Assunto Ácido lipóico
Cicatrização de feridas
Nanotecnologia
[en] Nanocapsules
[en] Thioctic acid
[en] Wound healing
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/83625
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