Abstract
The invasion of human malignant melanoma cells into the extracellular matrix (ECM) involves the accumulation of proteases at sites of ECM degradation where activation of matrix metalloproteases (MMP) occurs. Here, we show that when membrane type 1 MMP (MT-MMP) was overexpressed in RPMI7951 human melanoma cells, the cells made contact with the ECM, activated soluble and ECM-bound MMP-2, and degraded and invaded the ECM. Further experiments demonstrated the importance of localization of the MT-MMP to invadopodia. Overexpression of MT-MMP without invadopodial localization caused activation of soluble MMP-2, but did not facilitate ECM degradation or cell invasiveness. Up-regulation of endogenous MT-MMP with concanavalin A caused activation of MMP-2. However, concanavalin A treatment prevented invadopodial localization of MT-MMP and ECM degradation. Neither a truncated MT-MMP mutant lacking transmembrane (TM) and cytoplasmic domains (ΔTM MT-MMP ), nor a chimeric MT-MMP containing the interleukin 2 receptor α chain (IL-2R) TM and cytoplasmic domains (ΔTM MT-MMP /TM IL-2R ) were localized to invadopodia or exhibited ECM degradation. Furthermore, a chimera of the TM/cytoplasmic domain of MT-MMP (TM MT-MMP ) with tissue inhibitor of MMP 1 (TIMP-1/TM MT-MMP ) directed the TIMP-1 molecule to invadopodia. Thus, the MT-MMP TM/cytoplasmic domain mediates the spatial organization of MT-MMP into invadopodia and subsequent degradation of the ECM.
Bibliography
Nakahara, H., Howard, L., Thompson, E. W., Sato, H., Seiki, M., Yeh, Y., & Chen, W.-T. (1997). Transmembrane/cytoplasmic domain-mediated membrane type 1-matrix metalloprotease docking to invadopodia is required for cellâinvasion. Proceedings of the National Academy of Sciences, 94(15), 7959â7964.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 10:42 a.m.) |
Deposited | 3 years, 4 months ago (April 13, 2022, 3:18 p.m.) |
Indexed | 1 month, 3 weeks ago (July 12, 2025, 6:58 p.m.) |
Issued | 28 years, 1 month ago (July 22, 1997) |
Published | 28 years, 1 month ago (July 22, 1997) |
Published Online | 28 years, 1 month ago (July 22, 1997) |
Published Print | 28 years, 1 month ago (July 22, 1997) |
@article{Nakahara_1997, title={Transmembrane/cytoplasmic domain-mediated membrane type 1-matrix metalloprotease docking to invadopodia is required for cell invasion}, volume={94}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.94.15.7959}, DOI={10.1073/pnas.94.15.7959}, number={15}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Nakahara, Hirokazu and Howard, Linda and Thompson, Erik W. and Sato, Hiroshi and Seiki, Motoharu and Yeh, Yunyun and Chen, Wen-Tien}, year={1997}, month=jul, pages={7959–7964} }