Search results for "Estrogen receptors"
showing 3 items of 13 documents
Interacción entre receptores de estrógenos, hipoxia, angiogénesis y metabolismo tumoral en cáncer de mama
2017
El cáncer de mama ocupa el primer lugar en incidencia y muerte por neoplasia maligna en mujeres en el mundo occidental. Sin embargo, la gran heterogeneidad de la enfermedad, hace que haya una necesidad creciente de biomarcadores no sólo para el diagnóstico preciso, sino también para el abordaje del paciente que permitan una medicina personalizada y de precisión. En términos generales existen tres factores que influyen notablemente en la agresividad de un tumor mamario. Por una parte, prevalece una fuerte correlación entre la proliferación y el receptor de estrógenos (ER). Por otra parte, la angiogénesis es necesaria para el aporte de nutrientes al tumor y juega así un papel fundamental en l…
Expression of Wild-Type and Variant Estrogen Receptor Alpha in Liver Carcinogenesis and Tumor Progression.
2011
Although estrogen receptors (ERs) are expressed in human hepatocellular carcinoma (HCC), several clinical trials have failed to demonstrate the efficacy of antiestrogen treatment in HCC patients. Recently, the identification of several ER splicing variants has enlightened the complex nature of estrogen signaling in peripheral tissues; this may help understanding estrogen role in either nontumoral or malignant nonclassical target organs, including liver. In this work we have investigated mRNA expression of wild-type and splice variants of ERα in nontumoral, cirrhotic, and malignant human liver, as well as in HCC cell lines, using an exon-specific reverse transcription polymerase chain reacti…
Aromatase and amphiregulin are correspondingly expressed in human liver cancer cells
2009
Human hepatocellular carcinoma (HCC) is associated with high mortality rates, being the third most common cause of cancer death worldwide. Although estrogens have been implicated in HCC, their potential role in development and/or progression of this malignancy remains unclear. In this study we investigated mRNA and protein expression of aromatase (Aro) and amphiregulin (AREG) in relation to estrogen receptors (ERs), in HepG2, Huh7, and HA22T human malignant liver cell lines, using RT-PCR and Western blot analyses. Aro expression was significantly higher (approximately 13-fold, P= 0.003) in HepG2 cells than in Huh7 cells, while no Aro expression could be detected in HA22T cells. Interestingl…