Inhibitory effects of ERß on proliferation, invasion, and tumor formation of MCF-7 breast cancer cells--prognostication for the use of ERß-selective therapy.
Pharm Biol
; 50(7): 839-49, 2012 Jul.
Article
em En
| MEDLINE
| ID: mdl-22486657
ABSTRACT
CONTEXT Estrogen is well-known as an important factor in the physiological functions and pathological processes of breast. Estrogen receptor ß (ERß) is expressed in the majority of breast cancers at lower levels compared with the normal breast tissue. OBJECTIVE:
The effect of ERß on the characteristics of breast tumor cells and its prognostication for the use of ERß-selective therapy were investigated here for the first time. MATERIALS ANDMETHODS:
ERß was overexpressed in ERα positive MCF-7 breast cancer cells by gene transfection. The proliferation, motility, and xenografts growth of MCF-7 cells were investigated by MTT assays, wound-healing assay and animal study.RESULTS:
Results demonstrated that ERß-GFP localized in both the cytoplasm and the nucleus in the presence of 17ß-estradiol (E2), with stronger fluorescence-signal intensity in the nucleus, 2.8-times higher than that in the cytoplasm. The ERß overexpressed MCF-7 cells resulted in a 38.7% decreased growth rate and motility in vitro. Furthermore, ERß overexpression enhanced the antiproliferative effects of phytoestrogen, antiestrogen, and histone deacetylase inhibitor. Exogenous ERß expression reduced tumor volume by 99% at 27 days postadministration, indicated that overexpression of ERß led to retardation of tumor formation and growth in immunodeficient mice. DISCUSSION ANDCONCLUSION:
This study provided a relatively new evidence to support that ERß is an important modulator of proliferation and motility of breast cancer cells, and implied for the first time a possibility for the use of novel ERß-selective therapies in breast cancer treatment.
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
1_ASSA2030
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Mama
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Receptor beta de Estrogênio
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Proliferação de Células
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Inibidores do Crescimento
Tipo de estudo:
Prognostic_studies
Limite:
Animals
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Female
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Humans
Idioma:
En
Revista:
Pharm Biol
Ano de publicação:
2012
Tipo de documento:
Article