期刊
MACROMOLECULAR BIOSCIENCE
卷 14, 期 6, 页码 889-898出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mabi.201300487
关键词
chip-based DNA analysis; daylight photo-polymerization; DNA immobilization; hydrogel; one-step polymerization
资金
- Federal Ministry of Education and Research (BMBF) Germany
- JBCI 2.0 InnoProfile-Transfer, Unternehmen Region (BMBF)
The fabrication of 3D hydrogel microarrays for DNA analytics that allow simple visual signal readout for on-site applications is described. A convenient one-step polymerization of the hydrogel including in situ capture oligonucleotide immobilization is accomplished by using N, N'-dimethylacrylamide/polyethylene glycol (PEG1900)-bisacrylamide monomers. The implementation of an acylphosphine-oxide photoinitiator even allows polymerization at daylight, whereas other approaches require exposure with light in the UV-range. This minimizes the risk of UV-caused DNA damages within the capture DNA-strand that could adversely affect the subsequent hybridization step. The porous network of these gel segments allows DNA as well as protein penetration. Thus, the successful in-gel DNA hybridization is monitored by the deposition of silver nanoparticles. These metal particles allow naked eye signal readout.
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