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DNA Melting Temperature Assay for Assessing the Stability of DNA Polyplexes Intended for Nonviral Gene Delivery

Title data

Schallon, Anja ; Synatschke, Christopher V. ; Pergushov, Dmitry V. ; Jérôme, Valérie ; Müller, Axel H. E. ; Freitag, Ruth:
DNA Melting Temperature Assay for Assessing the Stability of DNA Polyplexes Intended for Nonviral Gene Delivery.
In: Langmuir. Vol. 27 (2011) Issue 19 . - pp. 12042-12051.
ISSN 1520-5827
DOI: https://doi.org/10.1021/la201803c

Official URL: Volltext

Abstract in another language

Many synthetic polycations have the ability to form complexes with the polyanion DNA, yet only a few, most notably poly(ethylene imine) (PEI), are efficient gene-delivery vehicles. Although a common explanation of this observation relies on the buffering capacity of the polycation, the intracellular stability of the complex may also play a role and should not be neglected. Assays typically used to follow complex formation, however, often do not provide the required information on stability. In this article, we propose the change in the DNA melting temperature observable after complex formation to be a significant indicator of complex stability. For a given DNA/polycation ratio, changes in the melting temperature are shown to depend on the polycation chemistry but not on the DNA topology or the polycation architecture. Effects of changes in the DNA/polycation ratio as well as the effect of polycation quaternization can be interpreted using the melting temperature assay. Finally, the assay was used to follow the displacement of DNA from the complexes by poly(methacrylic acid) or short single-stranded DNA sequences as competing polyanions.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: PMID: 21770418
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Process Biotechnology
Faculties > Faculty of Engineering Science > Chair Process Biotechnology > Chair Process Biotechnology - Univ.-Prof. Dr. Ruth Freitag
Faculties
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences
600 Technology, medicine, applied sciences > 610 Medicine and health
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 24 Feb 2016 12:58
Last Modified: 24 Feb 2016 12:58
URI: https://eref.uni-bayreuth.de/id/eprint/31027