Effect of oncostatin M on uridine diphosphate-5'-glucuronosyltransferase 1A1 through cross talk with constitutive androstane receptor.
Hyperbilirubinemia remains a common condition in neonates. The constitutive androstane receptor (CAR) is an orphan nuclear receptor that has been shown to participate in the activation of the uridine diphosphate-5'-glucuronosyltransferase 1A1 (UGT1A1) gene, which plays an important role in bilirubin clearance. Oncostatin M (OSM), a member of the IL-6 family, is involved in the maturation of fetal hepatocytes. We have demonstrated that low OSM levels are a potential indicator of neonatal jaundice and the need for phototherapy. In this study we examined the effects of OSM on CAR-mediated signaling to investigate its potential role in neonatal jaundice via the CAR-UGT1A1 pathway. We observed that OSM positively augmented the CAR and UGT1A1 expressions and CAR-mediated signaling in vivo and in vitro, through cross talk between the nuclear CAR receptor and the plasma membrane OSM receptor, via the MAPK cascade. These data suggest that OSM might play a role in bilirubin metabolism via the CAR-UGT1A1 pathway.
Masuyama
Hisashi
H
Department of Obstetrics and Gynecology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan. masuyama@cc.okayama-u.ac.jp
Nakatsukasa
Hideki
H
Hiramatsu
Yuji
Y
D000818:Animals; D000831:Animals, Newborn; D015153:Blotting, Western; D000090702:Constitutive Androstane Receptor; D051544:Cytochrome P-450 CYP3A / Q000235:genetics / Q000378:metabolism; D005419:Flavonoids / Q000494:pharmacology; D014453:Glucuronosyltransferase / Q000235:genetics / Q000378:metabolism*; D056945:Hep G2 Cells; D006801:Humans; D007231:Infant, Newborn; D007567:Jaundice, Neonatal / Q000378:metabolism; D051379:Mice; D008813:Mice, Inbred ICR; D020928:Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism; D053683:Oncostatin M / Q000494:pharmacology*; D010091:Oximes / Q000494:pharmacology; D010634:Phenobarbital / Q000494:pharmacology; D018160:Receptors, Cytoplasmic and Nuclear / Q000819:agonists / Q000235:genetics / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015398:Signal Transduction / Q000187:drug effects / Q000235:genetics; D013844:Thiazoles / Q000494:pharmacology; D000099148:UGT1A1 Enzyme
D000090702:Constitutive Androstane Receptor; D051544:Cytochrome P-450 CYP3A; D005419:Flavonoids; D014453:Glucuronosyltransferase; D020928:Mitogen-Activated Protein Kinases; D053683:Oncostatin M; D010091:Oximes; D010634:Phenobarbital; D018160:Receptors, Cytoplasmic and Nuclear; D013844:Thiazoles; D000099148:UGT1A1 Enzyme; C475093:6-(4-chlorophenyl)imidazo(2,1-b)(1,3)thiazole-5-carbaldehyde O-(3,4-dichlorobenzyl)oxime; C510163:CYP3A4 protein, human; C093973:2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one