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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2011.tde-26012012-085954
Document
Author
Full name
Hosana Gomes Rodrigues
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2011
Supervisor
Committee
Curi, Rui (President)
Boaventura, Maria Fernanda Cury
Ferreira, Lydia Masako
Santos, Marinilce Fagundes dos
Soriano, Francisco Garcia
Title in Portuguese
Modulação do processo de cicatrização pelos ácidos oleico e linoleico.
Keywords in Portuguese
Ácido linoléico
Ácidos carboxílicos
Ácidos graxos
Cicatrização
Citocinas
Inflamação
Abstract in Portuguese
O presente estudo teve como objetivo caracterizar o processo de cicatrização e investigar os efeitos da suplementação (gavagem) com OL e Li em estudos in vivo. Após anestesia, uma área de 10 mm2 de pele foi removida cirurgicamente da região dorsal dos animais. A suplementação com Li reduziu o tamanho das feridas no sétimo dia após a indução. Esse resultado foi acompanhado de aumento na produção de peróxido de hidrogênio (H2O2). O OL reduziu o conteúdo de H2O2 após 24 horas. Li acelerou a resposta migratória, aparecendo células inflamatórias uma hora após o ferimento. OL induziu ativação do fator de transcrição NF-kB e o Li ativou AP-1 após uma hora. Em 24 horas, ambos AGs inibiram o NF-kB e não alteraram o AP-1. Li elevou as concentrações de CINC-2ab e OL aumentou TNF-a, no homogenato, uma hora após a indução da ferida. Em 24 horas, ambos AGs reduziram a expressão e as concentrações de IL-1b, IL-6 e MIP-3a. A suplementação com OL e Li acelerou a fase inflamatória do processo de cicatrização.
Title in English
Modulation of the wound healing by oleci and linoleic acids supplementation.
Keywords in English
Carboxylic acids
Cytokines
Fatty acids
Healing
Inflammation
Linoleic acid
Abstract in English
This study aimed to characterize the healing process and to investigate the effects of supplementation (gavage) with OL and Li on the healing process through in vivo experiments. After anesthesia, an area of 10 mm2 of skin was surgically removed from the dorsum. Li reduced the size of the wounds on the seventh day after induction. This result was accompanied by increased production of hydrogen peroxide (H2O2). OL reduced the H2O2 content after 24 hours. Li accelerated the migratory response, since inflammatory cells were found one hour after the wound. OL activated the transcription factor NF-kB and Li increased the activation of AP-1 one hour after wound induction. Both fatty acids reduced the activation of NF-kB and did not alter AP-1 after 24 hours. Li raised the concentrations of CINC-2ab and OL increased TNF-a, in the homogenate, one hour after wound induction. In 24 hours, the FA reduced expression and concentrations of IL-1b, IL-6 and MIP-3a. Putting together, our results demonstrate that OL and Li accelerate the inflammatory phase of the wound healing.
 
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Publishing Date
2012-02-13
 
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