Genomic antagonism between retinoic acid and estrogen signaling in breast cancer.
Cell
; 137(7): 1259-71, 2009 Jun 26.
Article
em En
| MEDLINE
| ID: mdl-19563758
Retinoic acid (RA) triggers antiproliferative effects in tumor cells, and therefore RA and its synthetic analogs have great potential as anticarcinogenic agents. Retinoic acid receptors (RARs) mediate RA effects by directly regulating gene expression. To define the genetic network regulated by RARs in breast cancer, we identified RAR genomic targets using chromatin immunoprecipitation and expression analysis. We found that RAR binding throughout the genome is highly coincident with estrogen receptor alpha (ERalpha) binding, resulting in a widespread crosstalk of RA and estrogen signaling to antagonistically regulate breast cancer-associated genes. ERalpha- and RAR-binding sites appear to be coevolved on a large scale throughout the human genome, often resulting in competitive binding activity at nearby or overlapping cis-regulatory elements. The highly coordinated intersection between these two critical nuclear hormone receptor signaling pathways provides a global mechanism for balancing gene expression output via local regulatory interactions dispersed throughout the genome.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Mama
/
Transdução de Sinais
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Regulação Neoplásica da Expressão Gênica
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Receptores do Ácido Retinoico
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Receptor alfa de Estrogênio
Limite:
Humans
Idioma:
En
Revista:
Cell
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Estados Unidos