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Abstract

Targeted Delivery of siRNA to Tumor Cells with Designed Ankyrin Repeat Protein Nanocomplexes

by
J. WINKLER
1,2,* and
U. ZANGEMEISTER-WITTKE
2
1
Department of Medicinal Chemistry, University of Vienna, Althanstraße 14, 1090 Vienna, Austria
2
Department of Pharmacology, University of Bern, Friedbühlstraße 49, 3010 Bern, Switzerland
*
Author to whom correspondence should be addressed.
Sci. Pharm. 2009, 77(6), 171; https://doi.org/10.3797/scipharm.oephg.21.SL-04
Submission received: 16 April 2009 / Accepted: 16 April 2009 / Published: 16 April 2009

Abstract

Specific delivery to tumors and efficient cellular uptake of nucleic acids are major challenges for gene-targeted cancer therapies. Tumor-targeted delivery using antibody fragments or immunoliposomes have already been demonstrated to enhance cellular uptake of nucleic acids by receptor-mediated endocytosis. Here we report the first use of an epithelial cell adhesion molecule (EpCAM)-specific designed ankyrin repeat protein (DARPin) as a carrier for siRNA. Designed ankyrin repeat proteins are a novel class of non-immunoglobulin binding proteins relying on the modularity of ankyrins. Their short length, high stability, and the lack of intramolecular cysteines facilitate proper folding, result in high-yield expression in E. coli, and allow engineering procedures usually not well tolerated by antibodies. A DARPin binding to EpCAM was derived from a designed protein library using ribosome display.

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MDPI and ACS Style

WINKLER, J.; ZANGEMEISTER-WITTKE, U. Targeted Delivery of siRNA to Tumor Cells with Designed Ankyrin Repeat Protein Nanocomplexes. Sci. Pharm. 2009, 77, 171. https://doi.org/10.3797/scipharm.oephg.21.SL-04

AMA Style

WINKLER J, ZANGEMEISTER-WITTKE U. Targeted Delivery of siRNA to Tumor Cells with Designed Ankyrin Repeat Protein Nanocomplexes. Scientia Pharmaceutica. 2009; 77(Short Lectures (SL)):171. https://doi.org/10.3797/scipharm.oephg.21.SL-04

Chicago/Turabian Style

WINKLER, J., and U. ZANGEMEISTER-WITTKE. 2009. "Targeted Delivery of siRNA to Tumor Cells with Designed Ankyrin Repeat Protein Nanocomplexes" Scientia Pharmaceutica 77, Short Lectures (SL): 171. https://doi.org/10.3797/scipharm.oephg.21.SL-04

APA Style

WINKLER, J., & ZANGEMEISTER-WITTKE, U. (2009). Targeted Delivery of siRNA to Tumor Cells with Designed Ankyrin Repeat Protein Nanocomplexes. Scientia Pharmaceutica, 77(Short Lectures (SL)), 171. https://doi.org/10.3797/scipharm.oephg.21.SL-04

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