| First Author | Chou WL | Year | 2007 |
| Journal | J Biol Chem | Volume | 282 |
| Issue | 25 | Pages | 18162-72 |
| PubMed ID | 17449869 | Mgi Jnum | J:123360 |
| Mgi Id | MGI:3718153 | Doi | 10.1074/jbc.M702289200 |
| Citation | Chou WL, et al. (2007) Identification of a novel prostaglandin reductase reveals the involvement of prostaglandin E2 catabolism in regulation of peroxisome proliferator-activated receptor gamma activation. J Biol Chem 282(25):18162-72 |
| abstractText | This report identifies a novel gene encoding 15-oxoprostaglandin-Delta13-reductase (PGR-2), which catalyzes the reaction converting 15-keto-PGE2 to 13,14-dihydro-15-keto-PGE2. The expression of PGR-2 is up-regulated in the late phase of 3T3-L1 adipocyte differentiation and predominantly distributed in adipose tissue. Overexpression of PGR-2 in cells decreases peroxisome proliferator-activated receptor gamma (PPARgamma)-dependent transcription and prohibits 3T3-L1 adipocyte differentiation without affecting expression of PPARgamma. Interestingly, we found that 15-keto-PGE2 can act as a ligand of PPARgamma to increase co-activator recruitment, thus activating PPARgamma-mediated transcription and enhancing adipogenesis of 3T3-L1 cells. Overexpression of 15-hydroxyprostaglandin dehydrogenase, which catalyzes the oxidation reaction of PGE2 to form 15-keto-PGE2, significantly increased PPARgamma-mediated transcription in a PGE2-dependent manner. Reciprocally, overexpression of wild-type PGR-2, but not the catalytically defective mutant, abolished the effect of 15-keto-PGE2 on PPARgamma activation. These results demonstrate a novel link between catabolism of PGE2 and regulation of ligand-induced PPARgamma activation. |
