2. Signaling Pathways
  3. Vitamin D Related/Nuclear Receptor
  4. Pregnane X Receptor (PXR)
  5. Pregnane X Receptor (PXR) Antagonist

Pregnane X Receptor (PXR) Antagonist

Pregnane X Receptor (PXR) Antagonists (2):

Cat. No. Product Name Effect Purity
  • HY-173033
    MI-883
    		Antagonist
    MI-883 is the orally active agonist for Constitutive Androstane Receptor (CAR, EC50=73 nM) and the antagonist for Pregnane X Receptor (PXR, IC50=0.1 μM). MI-883 stimulates CAR LBD assembly (EC50=0.38 µM) and CAR3 variant activation (EC50=0.074 µM), induces CYP2B6 mRNA expression in HepaRG and primary human hepatocytes. MI-883 inhibits basal PXR activity IC50=2.03 µM) in transiently transfected HepG2 cells, blocks CYP3A4 mRNA expression in HepG2. MI-883 regulates cholesterol metabolism and bile acid excretion, improves hypercholesterolemia in mouse models.
  • HY-175264
    MI891
    		Antagonist
    MI891 is a highly selective PXR antagonist (IC50 = 3.76 μM, Kd = 1.7 μM) and inverse agonist (IC50 = 6.1 μM). MI891 selectively disrupts the interaction between PXR and its coactivator SRC1. MI891 effectively inhibits Rifampicin (HY-B0272)-induced PXR activation. MI891 is useful for the study of metabolic diseases and other diseases.