The estrogen and progesterone receptor (ER and PR) expression with the q-PCR technique was evaluated in 26 female dog carrying of mammary tumors and five female dogs without mammary disease (control group). The results showed that the three animal groups evaluated - malignant or benign tumor and control - expressed alpha and beta estrogen and progesterone receptors. The relative quantification showed a tendency for a higher expression of receptors from the control group and smaller in the malignat tumors animal group. Also, there was a major ERα expression regarding to ERβ and the malignat tumors from mixed origin presented higher concentrations of receptors PR, ERα and ERβ, when compared to tumors of epithelial origin.
female dogs; mammary gland tumor; estrogen; progesterone; receptors
