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Methods for evaluating cell-specific, cell-internalizing RNA aptamers
Department of Internal Medicine, University of of Iowa, Iowa City, IA 52242, United States; University of of Iowa, Iowa City, IA 52242, United States.
Department of Internal Medicine, University of of Iowa, Iowa City, IA 52242, United States; University of of Iowa, Iowa City, IA 52242, United States.
Department of Internal Medicine, University of of Iowa, Iowa City, IA 52242, United States; University of of Iowa, Iowa City, IA 52242, United States.
Department of Microbiology, University of of Iowa, Iowa City, IA 52242, United States; Department of Radiation Oncology, University of of Iowa, Iowa City, IA 52242, United States; University of of Iowa, Iowa City, IA 52242, United States.
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2013 (English)In: Pharmaceuticals, ISSN 1424-8247, E-ISSN 1424-8247, Vol. 6, no 3, 295-319 p.Article in journal (Refereed) Published
Abstract [en]

Recent clinical trials of small interfering RNAs (siRNAs) highlight the need for robust delivery technologies that will facilitate the successful application of these therapeutics to humans. Arguably, cell targeting by conjugation to cell-specific ligands provides a viable solution to this problem. Synthetic RNA ligands (aptamers) represent an emerging class of pharmaceuticals with great potential for targeted therapeutic applications. For targeted delivery of siRNAs with aptamers, the aptamer-siRNA conjugate must be taken up by cells and reach the cytoplasm. To this end, we have developed cell- based selection approaches to isolate aptamers that internalize upon binding to their cognate receptor on the cell surface. Here we describe methods to monitor for cellular uptake of aptamers. These include: (1) antibody amplification microscopy, (2) microplate- based fluorescence assay, (3) a quantitative and ultrasensitive internalization method (QUSIM) and (4) a way to monitor for cytoplasmic delivery using the ribosome inactivating protein-based (RNA-RIP) assay. Collectively, these methods provide a toolset that can expedite the development of aptamer ligands to target and deliver therapeutic siRNAs in vivo. © 2013 by the authors; licensee MDPI, Basel, Switzerland.

Place, publisher, year, edition, pages
Multidisciplinary Digital Publishing Institute (M D P I AG) , 2013. Vol. 6, no 3, 295-319 p.
Keyword [en]
Cell-internalizing aptamers; Cell-SELEX; RNA aptamers; siRNA delivery; Targeted delivery
National Category
Biochemistry and Molecular Biology
Identifiers
URN: urn:nbn:se:liu:diva-143333DOI: 10.3390/ph6030295PubMedID: 23894227Scopus ID: 2-s2.0-84875189364OAI: oai:DiVA.org:liu-143333DiVA: diva2:1162483
Available from: 2017-12-04 Created: 2017-12-04 Last updated: 2017-12-12Bibliographically approved

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Hernandez, Luiza I.Hernandez, Frank J

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