Article (Scientific journals)
Type Iv Collagen Induces Matrix Metalloproteinase 2 Activation in Ht1080 Fibrosarcoma Cells
Maquoi, Erik; Frankenne, F.; Noël, Agnès et al.
2000In Experimental Cell Research, 261 (2), p. 348-59
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Abstract :
[en] Matrix metalloproteinase 2 (MMP-2) activation has been described as a "master switch" which triggers tumor spread and metastatic progression. We show here that type IV collagen, a major component of basement membranes, promotes MMP-2 activation by HT1080 cells. When plated on plastic, HT1080 cells constitutively processed the 66-kDa pro-MMP-2 into a 62-kDa intermediate activated form, most probably through a membrane type (MT) 1 MMP-dependent mechanism. In the presence of type IV collagen, part of this intermediate form was further processed to fully activated 59-kDa MMP-2. This activation was prevented by tissue inhibitor of MMP (TIMP)-2 and a broad-spectrum hydroxamic acid-based synthetic MMP inhibitor (GI129471). Type IV collagen-mediated pro-MMP-2 activation did not involve either a transcriptional modulation of MMP-2, MT1-MMP, or TIMP-2 expression nor any alteration of MT1-MMP protein synthesis or processing. An inverse relationship between MMP-2 activation and the concentration of secreted TIMP-2 was observed. This is consistent with our previous report that TIMP-2 degradation is probably linked to the MT1-MMP-dependent MMP-2 activation mechanism. Because invasive tumor cells must breach basement membranes at different steps of the metastatic dissemination, the ability of HT1080 cells to activate pro-MMP-2 in the presence of type IV collagen might represent a key regulatory mechanism for the acquisition of an invasive potential.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Maquoi, Erik  ;  Université de Liège - ULiège > Département des sciences cliniques > Labo de biologie des tumeurs et du développement
Frankenne, F.
Noël, Agnès ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biologie cellulaire et moléculaire appliquée à l'homme
Krell, H. W.
Grams, F.
Foidart, Jean-Michel ;  Université de Liège - ULiège > Département des sciences cliniques > Gynécologie - Obstétrique
Language :
English
Title :
Type Iv Collagen Induces Matrix Metalloproteinase 2 Activation in Ht1080 Fibrosarcoma Cells
Publication date :
15 December 2000
Journal title :
Experimental Cell Research
ISSN :
0014-4827
eISSN :
1090-2422
Publisher :
Academic Press, Orlando, United States - Florida
Volume :
261
Issue :
2
Pages :
348-59
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 15 May 2009

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