Reference : Modulation of adipose tissue expression of murine matrix metalloproteinases and their ti...
Scientific journals : Article
Human health sciences : Endocrinology, metabolism & nutrition
http://hdl.handle.net/2268/14933
Modulation of adipose tissue expression of murine matrix metalloproteinases and their tissue inhibitors with obesity
English
Maquoi, Erik mailto [Université de Liège - ULg > Département des sciences cliniques > Labo de biologie des tumeurs et du développement >]
Munaut, Carine mailto [Université de Liège - ULg > Département des sciences cliniques > Labo de biologie des tumeurs et du développement >]
Colige, Alain mailto [Université de Liège - ULg > Département des sciences biomédicales et précliniques > Laboratoire de Biologie des tissus conjonctifs > > >]
Collen, Désiré [ > > ]
Lijnen, Roger [ > > ]
Apr-2002
Diabetes
American Diabetes Association
51
4
1093-1101
Yes (verified by ORBi)
International
0012-1797
1939-327X
Alexandria
VA
[en] obesity ; adipocyte ; MMP
[en] The potential role of the matrix metalloproteinase (MMP) system in the pathophysiology of the adipose tissue was investigated in a mouse model of nutritionally induced obesity. mRNA levels of 16 MMPs and 4 tissue inhibitors of MMPs (TIMPs) were measured by semiquantitative RT-PCR in adipose tissue isolated from mice maintained for 15 weeks on a standard or high-fat diet. In mice on standard diet, with the exception of MMP-8, all MMP and TIMP transcripts were detected in both gonadal and subcutaneous depots. In obese mice, the expression of MMP-3, -11, -12, -13, and -14 and TIMP-1 mRNAs was upregulated, whereas that of MMP-7, -9, -16, and -24 and TIMP-4 was downregulated. Most MMP and TIMP mRNAs were expressed at higher levels in stromal-vascular cells than in mature adipocytes. Analysis of adipose tissue by in situ fluorescent zymography revealed MMP-dependent proteolytic activities, demonstrating the presence of active MMPs in the intact tissue. In vitro conversion of adipogenic 3T3-F442A cells into mature adipocytes was associated with substantial modulations of MMP and TIMP expression. Moreover, this in vitro adipogenesis was reduced in the presence of a synthetic MMP inhibitor. Thus, the adipose tissue expresses a large array of MMPs and TIMPs, which modulate adipocyte differentiation.
http://hdl.handle.net/2268/14933

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