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Published in: Cancer Immunology, Immunotherapy 12/2006

01-12-2006 | Original Article

Target-selective activation of a TNF prodrug by urokinase-type plasminogen activator (uPA) mediated proteolytic processing at the cell surface

Authors: Jeannette Gerspach, Julia Németh, Sabine Münkel, Harald Wajant, Klaus Pfizenmaier

Published in: Cancer Immunology, Immunotherapy | Issue 12/2006

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Abstract

We have previously developed TNF prodrugs comprised of a N-terminal scFv targeting, a TNF effector and a C-terminal TNFR1-derived inhibitor module linked to TNF via a MMP-2 motif containing peptide, allowing activation by MMP-2-expressing tumor cells. To overcome the known heterogeneity of matrix metalloprotease expression, we developed TNF prodrugs that become processed by other tumor and/or stroma-associated proteases. These TNF prodrugs comprise either an uPA-selective or a dual uPA-MMP-2-specific linker which displayed efficient, target-dependent and cleavage sequence-specific activation by the corresponding tumor cell-expressed proteases. Selective pharmacologic inhibition of endogenous uPA and MMP-2 confirm independent prodrug processing by these two model proteases and indicate the functional superiority of a prodrug containing a multi-specific protease linker. Processing optimised TNF prodrugs should increase the proportion of active therapeutic within the targeted tissue and thus potentially enhance tumor response rate.
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Metadata
Title
Target-selective activation of a TNF prodrug by urokinase-type plasminogen activator (uPA) mediated proteolytic processing at the cell surface
Authors
Jeannette Gerspach
Julia Németh
Sabine Münkel
Harald Wajant
Klaus Pfizenmaier
Publication date
01-12-2006
Publisher
Springer-Verlag
Published in
Cancer Immunology, Immunotherapy / Issue 12/2006
Print ISSN: 0340-7004
Electronic ISSN: 1432-0851
DOI
https://doi.org/10.1007/s00262-006-0162-6

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