Role of PPARγ in Regulating a Cascade Expression of Cyclin-dependent Kinase Inhibitors, p18(INK4c) and p21(Waf1/Cip1), during Adipogenesis

Molecular mechanisms coupling growth arrest and cell differentiation were examined during adipogenesis. Data are presented that document a cascade expression of members of two independent families of cyclin-dependent kinase inhibitors that define distinct states of growth arrest during 3T3-L1 preadipocyte differentiation. Exit from the cell cycle into a pre-differentiation state of post-mitotic growth arrest was characterized by significant...