| Autor: |
Ana Carolina Trompieri Silveira, Daniel Gerardi, Juliana Vitti Mouro, Mirela Tinucci Costa, Antonio Carlos Alessi |
| Jazyk: |
English<br />Portuguese |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
Ciência Rural, Vol 39, Iss 4, Pp 1148-1154 (2009) |
| Druh dokumentu: |
article |
| ISSN: |
1678-4596 |
| Popis: |
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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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