title: Gelatinase B (MMP-9) gene silencing does not affect murine preadipocyte differentiation.
abstract: Growth of adipose tissue involves differentiation of preadipocytes into mature lipid-containing adipocytes. The matrix metalloproteinases (MMPs) are known regulators of adipose tissue biology, and previous studies suggested a key role for gelatinase B (MMP-9) in adipogenesis. In the present study we have evaluated a potential functional role of MMP-9 by performing gene silencing in 3T3-F442A preadipocytes. At the end of a 12-day differentiation period, no significant differences were observed between MMP-9 knockdown cells and the control cells with respect to intracytoplasmatic lipid content, or expression of the adipogenic markers aP2, PPARγ, Lpl, and adiponectin, or of the preadipocyte marker Pref-1. Thus, in vitro differentiation of 3T3-F442A preadipocytes into mature adipocytes is not significantly affected by the loss of MMP-9.
authors.affiliation: Center for Molecular and Vascular Biology; Department of Cardiovascular Sciences; KU Leuven; Leuven, Belgium.
authors.forename: Dries
authors.initials: D
authors.lastname: Bauters
authors.affiliation: Center for Molecular and Vascular Biology; Department of Cardiovascular Sciences; KU Leuven; Leuven, Belgium.
authors.forename: Matthias
authors.initials: M
authors.lastname: Van Hul
authors.affiliation: Center for Molecular and Vascular Biology; Department of Cardiovascular Sciences; KU Leuven; Leuven, Belgium.
authors.forename: Henri Roger
authors.initials: HR
authors.lastname: Lijnen
keywords: adipogenesis; adipose tissue; gelatinase; matrix metalloproteinase; preadipocyte