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CD70-restricted specific activation of TRAILR1 or TRAILR2 using scFv-targeted TRAIL mutants.

ABSTRACT: To combine the CD27 stimulation inhibitory effect of blocking CD70 antibodies with an antibody-dependent cellular cytotoxicity (ADCC)-independent, cell death-inducing activity for targeting of CD70-expressing tumors, we evaluated here fusion proteins of the apoptosis-inducing TNF family member TRAIL and a single-chain variable fragment (scFv) derived from a high-affinity llama-derived anti-human CD70 antibody (l?hCD70). A fusion protein of scFv:l?hCD70 with TNC-TRAIL, a stabilized form of TRAIL, showed strongly enhanced apoptosis induction upon CD70 binding and furthermore efficiently interfered with CD70-CD27 interaction. Noteworthy, introduction of recently identified mutations that discriminate between TRAILR1 and TRAILR2 binding into the TRAIL part of scFv:l?hCD70-TNC-TRAIL resulted in TRAIL death receptor-specific fusion proteins with CD70-restricted activity.

SUBMITTER: Trebing J

PROVIDER: S-EPMC4040681 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

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CD70-restricted specific activation of TRAILR1 or TRAILR2 using scFv-targeted TRAIL mutants.

Trebing J J El-Mesery M M Schäfer V V Weisenberger D D Siegmund D D Silence K K Wajant H H

Cell death & disease 20140130

To combine the CD27 stimulation inhibitory effect of blocking CD70 antibodies with an antibody-dependent cellular cytotoxicity (ADCC)-independent, cell death-inducing activity for targeting of CD70-expressing tumors, we evaluated here fusion proteins of the apoptosis-inducing TNF family member TRAIL and a single-chain variable fragment (scFv) derived from a high-affinity llama-derived anti-human CD70 antibody (lαhCD70). A fusion protein of scFv:lαhCD70 with TNC-TRAIL, a stabilized form of TRAIL, ...[more]

PMID: 24481449

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