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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2015.tde-10062015-140608
Document
Author
Full name
Tatiane Aparecida Canhamero Gasparelo
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2015
Supervisor
Committee
Franco, Marcelo de (President)
Garlet, Gustavo Pompermaier
Mauro, Eliana Faquim de Lima
Negro, Sonia Jancar
Passos Junior, Geraldo Aleixo da Silva
Title in Portuguese
Influência de Loci reguladores de inflamação aguda na determinação de cicatrização ou regeneração tissular em camundongos geneticamente selecionados para máxima ou mínima resposta inflamatória aguda.
Keywords in Portuguese
Camundongos geneticamente selecionados
Cicatrização
Gene Slc11a1
Inflamação
Regeneração
Reparo tecidual
Abstract in Portuguese
Sublinhagens de camundongos AIRmax e AIRmin homozigotas para os alelos S do gene Slc11a1 diferem na capacidade de reparar um orifício na orelha. Os animais AIRmaxSS regeneraram o tecido da orelha 30 dias após a perfuração, enquanto que os animais AIRminSS apenas cicatrizaram a ferida mas nunca a restauraram completamente. A regeneração da orelha observada nos animais AIRmaxSS deve-se a inflamação menos intensa da área ferida no início do processo de reparação, culminando em baixa deposição de colágeno e expressão da proteína a-SMA na orelha desses animais e a repressão de genes participantes em funções relacionadas à contração muscular. Além disso, detectamos alguns genes candidatos no cromossomo 11 regulando o fenótipo de cicatrização tissular da orelha de camundongos AIRminSS. Os resultados obtidos sugerem que o grau da resposta inflamatória, assim como a ativação ou repressão de genes participantes durante os eventos de reparação tissular podem modular a qualidade da resolução da injúria, culminando em um processo regenerativo ou de cicatrização.
Title in English
Influence of regulatory loci of acute inflammation in determination of wound healing or regeneration in mice genetically selected for maximal or minimal acute inflammatory response.
Keywords in English
Slc11a1 gene
Genetically selected mice
Inflammation
Regeneration
Tissue repair
Wound healing
Abstract in English
Homozygous AIRmax and AIRmin sublines for Slc11a1 R and S alleles differ in the ability to repair to the ear hole. AIRmaxSS mice exhibited regeneration 30 days after ear punch while AIRminSS animals did not show regeneration. The regeneration observed in AIRmaxSS mice was due to lower inflammation at the beginning of repair process resulting in less deposition of collagen and expression of a-SMA protein in the ears of these animals. Down regulated genes related with muscle contraction was observed in AIRmaxSS mice. In addition, AIRminSS mice presented gene cluster on chromosome 11 with expression profile that predispose them to wound healing with scar. These results suggest that the importance of regulating inflammation in the initial events and the activation and repression of some genes related to the wound healing phenotype can drives tissue regeneration or wound healing after ear punch.
 
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Publishing Date
2015-06-10
 
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