Rational design of porous poly(ethylene glycol) films as a matrix for ssDNA immobilization and hybridization
Poly(ethylene glycol) (PEG) films, fabricated by thermally induced crosslinking of amine- and epoxy-terminated four-arm STAR-PEG precursors, were used as porous and bioinert matrix for single-stranded DNA (ssDNA) immobilization and hybridization. The immobilization relied on the reaction between the...
Gespeichert in:
| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
24 August 2022
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| In: |
Bioengineering
Year: 2022, Jahrgang: 9, Heft: 9, Pages: 1-16 |
| ISSN: | 2306-5354 |
| DOI: | 10.3390/bioengineering9090414 |
| Online-Zugang: | Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.3390/bioengineering9090414 Verlag, lizenzpflichtig, Volltext: https://www.mdpi.com/2306-5354/9/9/414 
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| Verfasserangaben: | Zhiyong Zhao, Saunak Das, Michael Zharnikov |
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| 520 | |a Poly(ethylene glycol) (PEG) films, fabricated by thermally induced crosslinking of amine- and epoxy-terminated four-arm STAR-PEG precursors, were used as porous and bioinert matrix for single-stranded DNA (ssDNA) immobilization and hybridization. The immobilization relied on the reaction between the amine groups in the films and N-hydroxy succinimide (NHS) ester groups of the NHS-ester-decorated ssDNA. Whereas the amount of reactive amine groups in the films with the standard 1:1 composition of the precursors turned out to be too low for efficient immobilization, it could be increased noticeably using an excess (2:1) concentration of the amine-terminated precursor. The respective films retained the bioinertness of the 1:1 prototype and could be successfully decorated with probe ssDNA, resulting in porous, 3D PEG-ssDNA sensing assemblies. These assemblies exhibited high selectivity with respect to the target ssDNA strands, with a hybridization efficiency of 78-89% for the matching sequences and full inertness for non-complementary strands. The respective strategy can be applied to the fabrication of DNA microarrays and DNA sensors. As a suitable transduction technique, requiring no ssDNA labeling and showing high sensitivity in the PEG-ssDNA case, electrochemical impedance spectroscopy is suggested. | ||
| 650 | 4 | |a electrochemical impedance spectroscopy | |
| 650 | 4 | |a poly(ethylene glycol) | |
| 650 | 4 | |a ssDNA hybridization | |
| 650 | 4 | |a ssDNA immobilization | |
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| 650 | 4 | |a X-ray photoelectron spectroscopy | |
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