| RRC ID |
38574
|
| 著者 |
Ohno M, Ikenaka Y, Ishizuka M.
|
| タイトル |
All-trans retinoic acid inhibits the recruitment of ARNT to DNA, resulting in the decrease of CYP1A1 mRNA expression in HepG2 cells.
|
| ジャーナル |
Biochem Biophys Res Commun
|
| Abstract |
Aryl hydrocarbon receptor (AHR) and AHR nuclear translocator (ARNT) are well-conserved transcription factors among species. However, there are a very limited number of reports on the physiological function of AHR, particularly on the regulation of AHR by endogenous compounds. We hence investigated the effects of all-trans retinoic acid (atRA) on cytochrome P450 (CYP) 1A1 gene transcription as a model of AHR-regulated transcription mechanisms in HepG2 cells, a human hepatoma cell line. Treatment with atRA significantly reduced transactivation and expression of CYP1A1 mRNA to less than half of its control value, and this inhibitory effect was mediated by RARα. The result of chromatin immunoprecipitation assay indicated that treatment with atRA at 1-100 nM drastically inhibited the recruitment of ARNT to DNA regions containing xenobiotic responsive elements. In conclusion, atRA at physiological concentrations could reduce AHR-mediated gene transcription via the inhibition of recruitment of ARNT to relevant DNA regions.
|
| 巻・号 |
417(1)
|
| ページ |
484-9
|
| 公開日 |
2012-1-6
|
| DOI |
10.1016/j.bbrc.2011.11.146
|
| PII |
S0006-291X(11)02187-5
|
| PMID |
22177959
|
| MeSH |
Aryl Hydrocarbon Receptor Nuclear Translocator / metabolism*
Cytochrome P-450 CYP1A1 / genetics*
DNA / metabolism
Gene Expression Regulation, Enzymologic / drug effects*
Genes, Reporter
Hep G2 Cells
Humans
Immunoprecipitation
RNA, Messenger / genetics
Receptors, Retinoic Acid / metabolism
Response Elements / drug effects
Response Elements / genetics
Retinoic Acid Receptor alpha
Transcriptional Activation / drug effects*
Tretinoin / pharmacology*
Tretinoin / physiology
|
| IF |
2.985
|
| 引用数 |
5
|
|
WOS 分野
|
BIOPHYSICS
BIOCHEMISTRY & MOLECULAR BIOLOGY
|
| リソース情報 |
| ヒト・動物細胞 |
Hep G2 |
