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@ARTICLE{FernndezUlibarri:126505,
author = {I. Fernández-Ulibarri$^*$ and K. Hammer$^*$ and M.
Arndt$^*$ and J. K. Kaufmann$^*$ and D. Dorer$^*$ and S.
Engelhardt$^*$ and R. E. Kontermann and J. Hess$^*$ and H.
Allgayer$^*$ and J. Krauss$^*$ and D. Nettelbeck$^*$},
title = {{G}enetic delivery of an immuno{RN}ase by an oncolytic
adenovirus enhances anticancer activity.},
journal = {International journal of cancer},
volume = {136},
number = {9},
issn = {0020-7136},
address = {Bognor Regis},
publisher = {Wiley-Liss},
reportid = {DKFZ-2017-02533},
pages = {2228 - 2240},
year = {2015},
abstract = {Antibody therapy of solid cancers is well established, but
suffers from unsatisfactory tumor penetration of large
immunoglobulins or from low serum retention of antibody
fragments. Oncolytic viruses are in advanced clinical
development showing excellent safety, but suboptimal potency
due to limited virus spread within tumors. Here, by
developing an immunoRNase-encoding oncolytic adenovirus, we
combine viral oncolysis with intratumoral genetic delivery
of a small antibody-fusion protein for targeted bystander
killing of tumor cells (viro-antibody therapy).
Specifically, we explore genetic delivery of a small
immunoRNase consisting of an EGFR-binding scFv antibody
fragment fused to the RNase Onconase (ONC(EGFR)) that
induces tumor cell death by RNA degradation after cellular
internalization. Onconase is a frog RNase that combines lack
of immunogenicity and excellent safety in patients with high
tumor killing potency due to its resistance to the human
cytosolic RNase inhibitor. We show that ONC(EGFR) expression
by oncolytic adenoviruses is feasible with an optimized,
replication-dependent gene expression strategy.
Virus-encoded ONC(EGFR) induces potent and EGFR-dependent
bystander killing of tumor cells. Importantly, the
ONC(EGFR)-encoding oncolytic adenovirus showed dramatically
increased cytotoxicity specifically to EGFR-positive tumor
cells in vitro and significantly enhanced therapeutic
activity in a mouse xenograft tumor model. The latter
demonstrates that ONC(EGFR) is expressed at levels
sufficient to trigger tumor cell killing in vivo. The
established ONC(EGFR)-encoding oncolytic adenovirus
represents a novel agent for treatment of EGFR-positive
tumors. This viro-antibody therapy platform can be further
developed for targeted/personalized cancer therapy by
exploiting antibody diversity to target further established
or emerging tumor markers or combinations thereof.},
keywords = {Antibodies, Viral (NLM Chemicals) / Antineoplastic Agents
(NLM Chemicals) / RNA (NLM Chemicals) / EGFR protein, human
(NLM Chemicals) / Receptor, Epidermal Growth Factor (NLM
Chemicals) / Ribonucleases (NLM Chemicals)},
cin = {F110 / D120 / G405 / G360},
ddc = {610},
cid = {I:(DE-He78)F110-20160331 / I:(DE-He78)D120-20160331 /
I:(DE-He78)G405-20160331 / I:(DE-He78)G360-20160331},
pnm = {316 - Infections and cancer (POF3-316)},
pid = {G:(DE-HGF)POF3-316},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:25303768},
doi = {10.1002/ijc.29258},
url = {https://inrepo02.dkfz.de/record/126505},
}