ORBi: Maquoi Erik - Modulation of adipose tissue expression of murine matrix metalloproteinases and their tissue inhibitors with obesity

Reference : Modulation of adipose tissue expression of murine matrix metalloproteinases and their ti...


	Document type :	Scientific journals : Article
	Discipline(s) :	Human health sciences : Endocrinology, metabolism & nutrition
	To cite this reference:	http://hdl.handle.net/2268/14933

Title :	Modulation of adipose tissue expression of murine matrix metalloproteinases and their tissue inhibitors with obesity
Language :	English
Author, co-author :	Maquoi, Erik [Université de Liège - ULg > Département des sciences cliniques > Labo de biologie des tumeurs et du développement >]
	Munaut, Carine [Université de Liège - ULg > Département des sciences cliniques > Labo de biologie des tumeurs et du développement >]
	Colige, Alain [Université de Liège - ULg > Département des sciences biomédicales et précliniques > Laboratoire de Biologie des tissus conjonctifs > > >]
	Collen, Désiré [ > > ]
	Lijnen, Roger [ > > ]
Publication date :	Apr-2002
Journal title :	Diabetes
Publisher :	American Diabetes Association
Volume :	51
Issue/season :	4
Pages :	1093-1101
Audience :	International
ISSN :	0012-1797
e-ISSN :	1939-327X
City :	Alexandria
Country :	VA
Keywords :	[en] obesity ; adipocyte ; MMP
Abstract :	[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.
Permalink :	http://hdl.handle.net/2268/14933

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