Gelatinases impart susceptibility to high-fat diet-induced obesity in mice

Academic Article

Abstract

  • Gelatinases play a role in adipose and muscle hypertrophy and could be involved in tissue remodeling in response to high-fat diet (HFD) intake. This study tested potential roles of gelatinases (matrix metalloproteinses-2 and -9 [MMP-2 and -9]) in relationship to an antigrowth factor [. myostatin (MSTN)] known to be dysregulated in relation to HFD-induced obesity (HFDIO) propensity. In vitro and ex vivo analyses demonstrated that MMP-9 increased mature MSTN levels, indicating a potential role of gelatinases in MSTN activation in vivo. HFD intake resulted in increased body weight and circulating blood glucose values in C57BL/6J and MMP-9 null mice, with no changes observed in SWR/J mice. HFD intake attenuated MMP-9 and MMP-2 mRNA levels in SWR/J mice while elevating MMP-2 levels in skeletal muscle in C57BL/6J mice. In MMP-9 null mice, the effects of HFD intake were muted. Consistent with changes in mRNA levels, HFD intake increased MMP-9 activity in muscle tissue of C57BL/6J mice, demonstrating a strong relationship between HFDIO susceptibility and local MMP regulation. Overall, resistance to HFDIO appears to correspond to low MMP-9 and MSTN levels, suggesting a role of MMP-9 in MSTN activation in local tissue responses to HFD intake. © 2013 Elsevier Inc.
  • Authors

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    Digital Object Identifier (doi)

    Author List

  • Biga PR; Froehlich JM; Greenlee KJ; Galt NJ; Meyer BM; Christensen DJ
  • Start Page

  • 1462
  • End Page

  • 1468
  • Volume

  • 24
  • Issue

  • 8