title: Inhibition of mitotic clonal expansion mediates fisetin-exerted prevention of adipocyte differentiation in 3T3-L1 cells.
abstract: Adipocytes are the key player in adipose tissue inflammation and subsequent systemic insulin resistance and its development involves complex process of proliferation and differentiation of preadipocytes. Fistein, a polyphenol flavonoid, is known to exert anti-inflammatory, anti-carcinogenic and anti-diabetic effects. In this study, we aimed to investigate the effect of fisetin on adipocyte proliferation and differentiation in 3T3-L1 preadipocyte cell line and its mechanism of action. We found that fisetin inhibits adipocyte differentiation in a concentration dependent manner, which were evidenced by Oil Red O staining and the protein expression of mature adipocyte marker genes fatty acid synthase and peroxisome proliferator-activated receptor γ. Moreover, the proliferation of preadipocytes was also markedly suppressed by treatment of fisetin for 24 and 48 h in the differentiation medium. We also found that fisetin inhibition of adipocyte differentiation was largely due to the effect on mitotic clonal expansion. Fisetin suppression of preadipocyte proliferation at early stage of differentiation was accompanied by the changes of expression of a series of cell cycle regulatory proteins. Altogether, our results suggest that the inhibition of adipocyte differentiation by fisetin may be at least in part mediated by cell cycle arrest during adipogenesis.
authors.affiliation: College of Pharmacy, Woosuk University, Jeollabuk-do, Wanju-gun, Korea.
authors.forename: Youngyi
authors.initials: Y
authors.lastname: Lee
authors.forename: Eun Ju
authors.initials: EJ
authors.lastname: Bae
mesh_terms: D041721:3T3-L1 Cells; D017667:Adipocytes / Q000166:cytology* / Q000187:drug effects* / Q000378:metabolism; D050156:Adipogenesis / Q000187:drug effects*; D000818:Animals; D059447:Cell Cycle Checkpoints / Q000187:drug effects; D018797:Cell Cycle Proteins / Q000378:metabolism; D002454:Cell Differentiation / Q000187:drug effects*; D049109:Cell Proliferation / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D054890:Fatty Acid Synthase, Type I / Q000378:metabolism; D005419:Flavonoids / Q000494:pharmacology*; D044948:Flavonols; D051379:Mice; D008938:Mitosis / Q000187:drug effects*; D050258:Mitosis Modulators / Q000494:pharmacology*; D047495:PPAR gamma / Q000378:metabolism
chemical_list: D018797:Cell Cycle Proteins; D005419:Flavonoids; D044948:Flavonols; D050258:Mitosis Modulators; D047495:PPAR gamma; D054890:Fatty Acid Synthase, Type I; C017875:fisetin