| Identifikační kód |
RIV/00216208:11160/20:10408095 |
| Název v anglickém jazyce |
The 3'-untranslated region contributes to the pregnane X receptor (PXR) expression down-regulation by PXR ligands and up-regulation by glucocorticoids |
| Druh |
J - Recenzovaný odborný článek (Jimp, Jsc a Jost) |
| Poddruh |
J/A - Článek v odborném periodiku je obsažen v databázi Web of Science společností Thomson Reuters s příznakem „Article“, „Review“ nebo „Letter“ (Jimp) |
| Jazyk |
eng - angličtina |
| Vědní obor |
30104 - Pharmacology and pharmacy |
| Rok uplatnění |
2020 |
| Kód důvěrnosti údajů |
S - Úplné a pravdivé údaje o výsledku nepodléhající ochraně podle zvláštních právních předpisů. |
| Počet výskytů výsledku |
4 |
| Popis výsledku v anglickém jazyce |
Pregnane X receptor (PXR) is the major regulator of xenobiotic metabolism. PXR itself is controlled by various signaling molecules including glucocorticoids. Moreover, negative feed-back regulation has been proposed at the transcriptional level. We examined the involvement of the 3'-untranslated region (3'-UTR) of NR1I2 mRNA and microRNAs in PXR- and glucocorticoid receptor (GR)-mediated regulation of NR1I2 gene expression. PXR ligands were found to significantly downregulate NR1I2 mRNA expression in a set of 14 human hepatocyte cultures. Similarly, PXR was downregulated by PCN in the C57/BL6 mice liver. In mechanistic studies with the full-length 3'-UTR cloned into luciferase reporter or expression vectors, we showed that the 3'-UTR reduces PXR expression. From the miRNAs tested, miR-18a-5p inhibited both NR1I2 expression and CYP3A4 gene induction. Importantly, we observed significant upregulation of miR-18a-5p expression 6 h after treatment with the PXR ligand rifampicin, which indicates a putative mechanism underlying NR1I2 negative feed-back regulation in hepatic cells. Additionally, glucocorticoids upregulated NR1I2 expression not only through the promoter region but also via 3'-UTR regulation, which likely involves downregulation of miR-18a-5p. We conclude that miR-18a-5p is involved in the down-regulation of NR1I2 expression by its ligands and in the upregulation of NR1I2 mRNA expression by glucocorticoids in hepatic cells. |
| Klíčová slova oddělená středníkem |
Cytochrome P450 3A4;Pregnane X receptor;Regulation;Glucocorticoid;MicroRNA;Gene expression |
| Stránka www, na které se nachází výsledek |
https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Jvtn9nCwj_ |
| DOI výsledku |
10.1016/j.apsb.2019.09.010 |
| Odkaz na údaje z výzkumu |
- |