title: Wortmannin, a specific phosphatidylinositol 3-kinase inhibitor, inhibits adipocytic differentiation of 3T3-L1 cells.
abstract: The effect of wortmannin, which inhibits phosphatidylinositol 3-kinase (PI 3-kinase), on adipocytic differentiation of 3T3-L1 cells was examined. The extent of differentiation was evaluated by the staining of adipocytes with Oil Red O and measurement of glycerol 3-phosphate dehydrogenase (GPDH) activity. Wortmannin, at over 100 nM, significantly inhibited adipogenesis of cells treated with isobutyl-methylxanthine, dexamethasone, and insulin with an IC50 value about 50 nM. These results suggest that PI 3-kinase plays a role in adipocytic differentiation of 3T3-L1 cells.
authors.affiliation: Department of Pharmacology, National Defense Medical College, Tokorazawa, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Tomiyama
authors.forename: H
authors.initials: H
authors.lastname: Nakata
authors.forename: H
authors.initials: H
authors.lastname: Sasa
authors.forename: S
authors.initials: S
authors.lastname: Arimura
authors.forename: E
authors.initials: E
authors.lastname: Nishio
authors.forename: Y
authors.initials: Y
authors.lastname: Watanabe
mesh_terms: D015056:1-Methyl-3-isobutylxanthine / Q000494:pharmacology; D019870:1-Phosphatidylinositol 4-Kinase; D016475:3T3 Cells; D017667:Adipocytes / Q000166:cytology* / Q000187:drug effects; D000730:Androstadienes / Q000494:pharmacology*; D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects*; D003907:Dexamethasone / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases / Q000378:metabolism; D007328:Insulin / Q000494:pharmacology; D051379:Mice; D019869:Phosphatidylinositol 3-Kinases; D017853:Phosphotransferases (Alcohol Group Acceptor) / Q000037:antagonists & inhibitors* / Q000378:metabolism; D000077191:Wortmannin
chemical_list: D000730:Androstadienes; D004791:Enzyme Inhibitors; D007328:Insulin; D003907:Dexamethasone; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases; D019869:Phosphatidylinositol 3-Kinases; D017853:Phosphotransferases (Alcohol Group Acceptor); D019870:1-Phosphatidylinositol 4-Kinase; D015056:1-Methyl-3-isobutylxanthine; D000077191:Wortmannin