Abstract
It has long been recognized that leptin, a hormone made by adipocytes, is an important circulating signal for the regulation of body weight. In addition, matrix metalloproteinase (MMP), especially MMP-2, an adipocyte-secreted protein which promotes multi-cellular adipose clusters, is up-regulated in obesity. The present study is designed to evaluate whether trans-10,cis-12 conjugated linoleic acid (t-CLA) can suppress leptin-induced MMP-2 secretion in 3T3-L1 cells. The result showed that expressions of adipocyte marker proteins were significantly reduced by t-CLA-treated cultures, but not by linoleic acid (LA)-treated ones. Interestingly, MMP-2 secretion was significantly increased by leptin-treated cultures, thereby leading to accelerate adipocyte differentiation, indicating that MMP-2 was a necessary mediator of adipogenesis. However, increasing concentration of t-CLA significantly reduced leptin-induced MMP-2 secretion and triglyceride (TG) content. These findings provide support for a role for t-CLA in the regulation of metabolism in leptin-induced adipose tissue development.
Original language | English |
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Pages (from-to) | 955-960 |
Number of pages | 6 |
Journal | Biochemical and biophysical research communications |
Volume | 356 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2007 May 18 |
Bibliographical note
Funding Information:This work was supported by the Agricultural R&D Promotion Center (ARPC) (2006-0053). We thank the National Instrumentation Center for Environmental Management (NICEM) and Research Institute of Pharmaceutical Sciences (RIPS) for measurement of PKC activation, ROS production, and NF-κB activation. We also thank Prof. Byung-Hoon Lee for technical assistance. H.S. Moon and J.H. Seo were supported by Brain Korea 21 (BK21) grant.
Keywords
- Conjugated linoleic acid
- Leptin
- Lipid accumulation
- Matrix metalloproteinase-2
ASJC Scopus subject areas
- Biophysics
- Biochemistry
- Molecular Biology
- Cell Biology