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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2014.tde-20022015-085525
Document
Author
Full name
Ana Flavia Marçal Pessoa
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2014
Supervisor
Committee
Santos, Marinilce Fagundes dos (President)
Câmara, Niels Olsen Saraiva
Engler, Silvya Stuchi Maria
Lima, Maria Helena de Melo
Rosa Neto, José Cesar
Title in Portuguese
A administração sistêmica e tópica de vitaminas antioxidantes acelera a cicatrização de feridas cutâneas em camundongos diabéticos.
Keywords in Portuguese
Antioxidantes
Cicatrização
Diabetes
Estresse oxidativo
Inflamação
Nanotecnologia
Abstract in Portuguese
A cicatrização deficiente é uma complicação do Diabetes Mellitus (DM), associada ao estresse oxidativo promovido pela hiperglicemia crônica. O objetivo deste estudo foi avaliar os efeitos da administração sistêmica (por via oral, vitaminas E+C) e tópica (utilizando nanopartículas lipídicas sólidas NLSs, vitamina E) de vitaminas antioxidantes na cicatrização de feridas cutâneas em camundongos diabéticos. Uma ferida dorsal foi realizada e os animais tratados com antioxidantes por via oral ou topicamente, diariamente. Os resultados mostraram um atraso na cicatrização das feridas nos diabéticos, menor intensidade da reação inflamatória no 3º dia. No 14º dia, observou-se persistência da reação inflamatória, atraso na reepitelização e menor conteúdo de colágenos fibrilares. O tratamento com vitaminas antioxidante, tanto sistêmico quanto tópico, foi efetivo na aceleração da cicatrização das feridas, por meio da modulação do estresse oxidativo e da reação inflamatória. Concluímos que o tratamento com vitaminas antioxidantes favorece a cicatrização cutânea em diabéticos.
Title in English
Sistemic and topical administration of antioxidant vitamins improve cutaneous wound healing in diabetic mice.
Keywords in English
Antioxidants
Diabetes
Inflammation
Nanotechnology
Oxidative stress
Wound healing
Abstract in English
Deficient cutaneous wound healing is a common complication of diabetes mellitus (DM), is associated with the oxidative stress caused by chronic hyperglycemia. The aim of this study was to evaluate the effects of systemic administration (oral, vitamins E + C) and topical (solid lipid nanoparticles SLN, vitamin E) of antioxidant vitamins in skin wound healing in diabetic mice. After 30 days, a dorsal wound was performed and the mice were treated orally with antioxidants or topically, daily. The results showed a delay in wound healing in diabetic animals, less severe inflammatory reactions on the 3rd and increased oxidative stress. On 14th there was a persistence of the inflammatory reactions, delayed reepithelization and lower content of fibrillar collagens in diabetic animals. Treatment with antioxidant vitamins, both systemic and topical, was completely effective in accelerating wound healing by modulating the oxidative stress and inflammatory reactions. We concluded that treatment with antioxidant vitamins E and C favors cutaneous wound healing in diabetics.
 
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Publishing Date
2015-02-20
 
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