Potencial metastático e reconhecimento da E-selectina em culturas e em tecidos colonizados pelo tumor ascítico de Ehrlich / Metastatic potencial and recognition of E-selectin in cultures and in tissues colonized by the Ehrlich ascitic tumor

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The ojective of this study was to evaluate the involvement of the adhesion molecule E-selectin in the process of metastasis of the Ehrlich ascitic tumor (EAT) and to clarify some aspects related to the invasive potential, inflammation and cellular adhesion. BALB/c mice were inoculated with 2 x 106 of the Ehrlich ascitic tumor cells by intramuscular or endovenous route, and also subcutaneous in the footpad. 15 and 30 days after inoculation the mice, they were euthanasied for histological analysis. Indirect immunoperoxidase for detection of E-selectin in tissues with metastasis was used. The control groups were constituted by animals free from the Ehrlich ascitic tumor. The results demonstrated that the E-selectin is not main molecule involved in the migration of the cells in the different periods studied (15 and 30 day). However, in vitro test, there is an intense adhesion of cells of this tumor in the activated endotelial cells by plasm containing pro-inflammatory cytokine. Ascitic liquid of the animals inoculated intraperitoneally with 2,5 x 106 cells of the tumor was collected in different stages of the tumoral development day 5, 7, 8, 10, 11, 12 and 14. However it was not capable to activate endotelial cells, showing that this tumor is not unleash in inflammatory reaction and maybe, this aspect can be a mechanism of defense of the host against the tumoral dissemination.

ASSUNTO(S)

breast tumors neoplasia das glândulas mamárias metástase metastasis patologia animal ehrlich ascitic tumor tumor ascítico de ehrlich

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