Aryl hydrocarbon receptor agonists directly activate estrogen receptor α in MCF-7 breast cancer cells
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Shengxi Liu
Abstract
The aryl hydrocarbon receptor (AhR) binds with high affinity to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and related halogenated aromatics, but also binds with lower affinity to structurally diverse exogenous and endogenous chemicals. One study reported that 3-methylcholanthrene (3MC) activated the estrogen receptor (ER) through the AhR, which acts as co-regulatory protein, whereas a recent report showed that 3MC directly bound and activated ERα. This study also shows that the AhR agonists benzo[a]pyrene, 3,3′,4,4′-tetrachlorobiphenyl, chrysin, 6-methyl-1,3,8-trichlorodibenzofuran, and 3,3′-diindolylmethane also induce ERα-dependent transactivation. Moreover, in chromatin immunoprecipitation assays, these compounds induce binding of AhR and ERα to the CYP1A1 and pS2 gene promoters, which is consistent with their activities as both selective AhR modulators (SAhRMs) and selective ER modulators (SERMs).
References
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©2006 by Walter de Gruyter Berlin New York
Articles in the same Issue
- The arylhydrocarbon receptor: more than a tox story
- The aryl hydrocarbon receptor and light
- The impact of aryl hydrocarbon receptor signaling on matrix metabolism: implications for development and disease
- A role for the aryl hydrocarbon receptor in mammary gland tumorigenesis
- Evidence supporting the hypothesis that one of the main functions of the aryl hydrocarbon receptor is mediation of cell stress responses
- The arylhydrocarbon receptor repressor (AhRR): structure, expression, and function
- Impact of the arylhydrocarbon receptor on eugenol- and isoeugenol-induced cell cycle arrest in human immortalized keratinocytes (HaCaT)
- Aryl hydrocarbon receptor agonists directly activate estrogen receptor α in MCF-7 breast cancer cells
- Identifying target genes of the aryl hydrocarbon receptor nuclear translocator (Arnt) using DNA microarray analysis
- Transcriptional signatures of immune cells in aryl hydrocarbon receptor (AHR)-proficient and AHR-deficient mice
- 14-3-3 proteins in membrane protein transport
- The K+ channel gene, Kcnb1: genomic structure and characterization of its 5′-regulatory region as part of an overlapping gene group
- Structure-based specificity mapping of secreted aspartic proteases of Candida parapsilosis, Candida albicans, and Candida tropicalis using peptidomimetic inhibitors and homology modeling
- The solution structure of the membrane-proximal cytokine receptor domain of the human interleukin-6 receptor
- Sequence determination of lychnin, a type 1 ribosome-inactivating protein from Lychnis chalcedonica seeds
- Paired helical filaments contain small amounts of cholesterol, phosphatidylcholine and sphingolipids
- Induction of intracellular signalling in human endothelial cells by the hyaluronan-binding protease involves two distinct pathways
- A novel proteolytically processed CDP/Cux isoform of 90 kDa is generated by cathepsin L
- Degradation of apolipoprotein B-100 by lysosomal cysteine cathepsins
- Identification of trypsin I as a candidate for influenza A virus and Sendai virus envelope glycoprotein processing protease in rat brain
Articles in the same Issue
- The arylhydrocarbon receptor: more than a tox story
- The aryl hydrocarbon receptor and light
- The impact of aryl hydrocarbon receptor signaling on matrix metabolism: implications for development and disease
- A role for the aryl hydrocarbon receptor in mammary gland tumorigenesis
- Evidence supporting the hypothesis that one of the main functions of the aryl hydrocarbon receptor is mediation of cell stress responses
- The arylhydrocarbon receptor repressor (AhRR): structure, expression, and function
- Impact of the arylhydrocarbon receptor on eugenol- and isoeugenol-induced cell cycle arrest in human immortalized keratinocytes (HaCaT)
- Aryl hydrocarbon receptor agonists directly activate estrogen receptor α in MCF-7 breast cancer cells
- Identifying target genes of the aryl hydrocarbon receptor nuclear translocator (Arnt) using DNA microarray analysis
- Transcriptional signatures of immune cells in aryl hydrocarbon receptor (AHR)-proficient and AHR-deficient mice
- 14-3-3 proteins in membrane protein transport
- The K+ channel gene, Kcnb1: genomic structure and characterization of its 5′-regulatory region as part of an overlapping gene group
- Structure-based specificity mapping of secreted aspartic proteases of Candida parapsilosis, Candida albicans, and Candida tropicalis using peptidomimetic inhibitors and homology modeling
- The solution structure of the membrane-proximal cytokine receptor domain of the human interleukin-6 receptor
- Sequence determination of lychnin, a type 1 ribosome-inactivating protein from Lychnis chalcedonica seeds
- Paired helical filaments contain small amounts of cholesterol, phosphatidylcholine and sphingolipids
- Induction of intracellular signalling in human endothelial cells by the hyaluronan-binding protease involves two distinct pathways
- A novel proteolytically processed CDP/Cux isoform of 90 kDa is generated by cathepsin L
- Degradation of apolipoprotein B-100 by lysosomal cysteine cathepsins
- Identification of trypsin I as a candidate for influenza A virus and Sendai virus envelope glycoprotein processing protease in rat brain