Unknown

Dataset Information

0

Activation of PXR by Alpinetin Contributes to Abrogate Chemically Induced Inflammatory Bowel Disease.


ABSTRACT: Alpinetin is a naturally occurring flavonoid from the ginger plants. We previously reported the identification of alpinetin as a ligand of human pregnane X receptor (hPXR). The current study investigated the role of alpinetin as a putative PXR activator in ameliorating chemically induced inflammatory bowel disease (IBD). We found that oral administration of alpinetin significantly alleviated the severity of dextran sulfate sodium (DSS)-induced colitis in mice by decreasing the inflammatory infiltration, the levels of the pro-inflammatory mediators, and the PXR target genes in the colon. In vitro, alpinetin blocked the nuclear translocation of p-p65 in lipopolysaccharide (LPS)-stimulated RAW264.7 macrophages. Further, alpinetin significantly upregulated PXR target genes and inhibited TNF-?-induced NF-?B-luciferase activity in LS174T colorectal cells; however, this regulatory effects were lost when cellular PXR gene was knocked down. In PXR transactivation assays, alpinetin increased both mouse and human PXR transactivation in a dose-dependent manner. Ligand occluding mutants, S247W/C284W and S247W/C284W/S208W, in hPXR-reporter assays, abrogated alpinetin-induced hPXR transactivation. Finally, alpinetin bound to the hPXR-ligand-binding domain (LBD) was confirmed by competitive ligand binding assay. The current study significantly extends prior observations by validating a PXR/NF-?B regulatory mechanism governing alpinetin's anti-inflammatory effects in a murine model of IBD.

SUBMITTER: Yu Z 

PROVIDER: S-EPMC7186371 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

altmetric image

Publications

Activation of PXR by Alpinetin Contributes to Abrogate Chemically Induced Inflammatory Bowel Disease.

Yu Zhilun Z   Yue Bei B   Ding Lili L   Luo Xiaoping X   Ren Yijing Y   Zhang Jingjing J   Mani Sridhar S   Wang Zhengtao Z   Dou Wei W  

Frontiers in pharmacology 20200421


Alpinetin is a naturally occurring flavonoid from the ginger plants. We previously reported the identification of alpinetin as a ligand of human pregnane X receptor (hPXR). The current study investigated the role of alpinetin as a putative PXR activator in ameliorating chemically induced inflammatory bowel disease (IBD). We found that oral administration of alpinetin significantly alleviated the severity of dextran sulfate sodium (DSS)-induced colitis in mice by decreasing the inflammatory infil  ...[more]

Similar Datasets

| S-EPMC4125479 | biostudies-literature
| S-EPMC3020373 | biostudies-literature
| S-EPMC2932663 | biostudies-literature
2012-09-12 | E-MTAB-184 | biostudies-arrayexpress
2004-04-20 | GSE1152 | GEO
| S-EPMC6611439 | biostudies-literature
| S-EPMC10140797 | biostudies-literature
| S-EPMC1727068 | biostudies-other
| S-EPMC7658076 | biostudies-literature
2023-07-03 | MSV000092337 | MassIVE