Data/hora: 09/06/2024 10:49:51

Provedor de dados: | 65
País: | Brazil
Título: | Immunohistochemical expression of B and T-lymphocytes and TGF-β in experimentally transplanted canine venereal tumor
Autores: | Silveira,Ana Carolina Trompieri; Gerardi,Daniel; Mouro,Juliana Vitti; Costa,Mirela Tinucci; Alessi,Antonio Carlos.
Data: | 2009-07-01
Ano: | 2009
Palavras-chave: | Lymphocytes; TVT; Immunohistochemistry; Dog.
Resumo: | The tumor/host relationship may have a determining role in the progression or remission of a tumor. Greater infiltration of leukocytes into tumors has been associated with a better prognosis, although controversy regarding whether these cells have a central role in antitumor immunity still exists. Canine transmissible venereal tumor (TVT) is an experimentally transplantable type of tumor that has been used as an experimental model for the tumor/host relationship. The aim of this study was to evaluate the infiltration of T-lymphocytes (CD3, CD4, CD8) and B lymphocytes (CD79-α) and the expression of the cytokine TGF-β in TVT, by means of immunohistochemistry (ABC method). The experimental tumors were composed of puppies that developed TVT after transplantation, in the progression (n=8) (Group 1a), latency (n=8) (Group 1b) and regression (n=8) (Group 1c) phases of the tumor. CD3+ T-lymphocytes predominated in the progression and regression phases, in relation to the latency phase. CD4+ and ¹CD8+ T-lymphocytes were predominant in the progression phase, and with lower expression in the regression phase. The greatest quantities of B-lymphocytes were in the regression phase, with restricted expression in the progression phase. TGF-β was expressed equally in the phases of the transplanted TVT.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000400029
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/S0103-84782009005000025
Formato: | text/html
Fonte: | Ciência Rural  v.39 n.4 2009
Fonte: | info:eu-repo/semantics/openAccess