Reference : Deficiency of tissue inhibitor of matrix metalloproteinase-1 (TIMP-1) impairs nutriti...
Scientific journals : Article
Human health sciences : Endocrinology, metabolism & nutrition
Deficiency of tissue inhibitor of matrix metalloproteinase-1 (TIMP-1) impairs nutritionally induced obesity in mice.
Lijnen, Roger [ > > ]
Demeulemeester, Diego [ > > ]
Van Hoef, B. [ > > ]
Collen, Désiré [ > > ]
Maquoi, Erik mailto [Université de Liège - ULiège > Département des sciences cliniques > Labo de biologie des tumeurs et du développement >]
Thrombosis and Haemostasis
Schattauer Gmbh-Verlag Medizin Naturwissenschaften
Yes (verified by ORBi)
[en] TIMP ; obesity ; adipose tissue
[en] Tissue inhibitor of matrix metalloproteinase-1 deficient (TIMP-1(-/-)) mice and wild-type (TIMP-1(+/+)) controls were kept on a standard (SFD) or a high fat diet (HFD) for 15 weeks. At the time of sacrifice, TIMP-1(-/-) mice on HFD had a significantly lower body weight (29 +/- 1.5 versus 41 +/- 1.8 g, p <0.005), and significantly less subcutaneous (0.81 +/- 0.19 versus 1.78 +/- 0.21 g, p <0.05) and gonadal (0.87 +/- 0.17 versus 1.85 +/- 0.18 g, p <0.005) fat mass. These differences were much less pronounced for mice on SFD. On HFD but not on SFD, adipocyte diameters were significantly lower in the adipose tissue of TIMP-1(-/-) mice. Plasma leptin levels in TIMP-1(-/-) mice on HFD were significantly lower as compared to TIMP-1(+/-) mice, and strongly correlated with adipose tissue mass for both genotypes. Staining with an endothelial cell specific lectin revealed a significantly higher blood vessel density, larger stained area and vessel size in adipose tissue of TIMP-1(-/-) mice on HFD. This difference disappeared after normalization to the adipocyte number, suggesting that it does not represent a true enhancement of angiogenesis. Thus, in a murine model of nutritionally induced obesity, TIMP-1 promotes adipose tissue development.

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