Article (Scientific journals)
Membrane Type 1 Matrix Metalloproteinase-Associated Degradation of Tissue Inhibitor of Metalloproteinase 2 in Human Tumor Cell Lines
Maquoi, Erik; Frankenne, Francis; Baramova, Eugénia et al.
2000In Journal of Biological Chemistry, 275 (15), p. 11368-78
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Abstract :
[en] Tissue inhibitor of metalloproteinase 2 (TIMP-2) is required for the membrane type 1 matrix metalloproteinase (MT1-MMP)-dependent activation of pro-MMP-2 on the cell surface. MT1-MMP-bound TIMP-2 has been shown to function as a receptor for secreted pro-MMP-2, resulting in the formation of a trimolecular complex. In the presence of uncomplexed active MT1-MMP, the prodomain of cell surface-associated MMP-2 is cleaved, and activated MMP-2 is released. However, the behavior of MT1-MMP-bound TIMP-2 during MMP-2 activation is currently unknown. In this study, (125)I-labeled recombinant TIMP-2 ((125)I-rTIMP-2) was used to investigate the fate of TIMP-2 during pro-MMP-2 activation by HT1080 and transfected A2058 cells. HT1080 and A2058 cells transfected with MT1-MMP cDNA (but not vector-transfected A2058 cells) were able to bind (125)I-rTIMP-2, to activate pro-MMP-2, and to process MT1-MMP into an inactive 43-kDa form. Under these conditions, (125)I-rTIMP-2 bound to the cell surface was rapidly internalized and degraded in intracellular organelles through a bafilomycin A(1)-sensitive mechanism, and (125)I-bearing low molecular mass fragment(s) were released in the culture medium. These different processes were inhibited by hydroxamic acid-based synthetic MMP inhibitors and rTIMP-2, but not by rTIMP-1 or cysteine, serine, or aspartic proteinase inhibitors. These results support the concept that the MT1-MMP-dependent internalization and degradation of TIMP-2 by some tumor cells might be involved in the regulation of pericellular proteolysis.
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, Francis 
Baramova, Eugénia
Munaut, Carine  ;  Université de Liège - ULiège > Département des sciences cliniques > Labo de biologie des tumeurs et du développement
Sounni, Nor Eddine  ;  Université de Liège - ULiège > Département des sciences cliniques > Labo de biologie des tumeurs et du développement
Remacle, Albert
Noël, Agnès ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biologie cellulaire et moléculaire appliquée à l'homme
Murphy, Gillian
Foidart, Jean-Michel ;  Université de Liège - ULiège > Département des sciences cliniques > Gynécologie - Obstétrique
Language :
English
Title :
Membrane Type 1 Matrix Metalloproteinase-Associated Degradation of Tissue Inhibitor of Metalloproteinase 2 in Human Tumor Cell Lines
Publication date :
14 April 2000
Journal title :
Journal of Biological Chemistry
ISSN :
0021-9258
eISSN :
1083-351X
Publisher :
American Society for Biochemistry and Molecular Biology, Baltimore, United States - Maryland
Volume :
275
Issue :
15
Pages :
11368-78
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 15 May 2009

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