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- W2334355871 abstract "Abstract Here, we report an injectable and biodegradable hydrogel based on drug-specific DNA polyaptamer networks using graphene oxide nanosheets as a physical crosslinker. Polyaptamer DNA and graphene oxide (PA-GO) hybrid hydrogels were constructed by single-step rolling-circle amplification (RCA) of a DNA template in the presence of GO nanosheets. The DNA template for RCA was designed to contain a kanamycin (Kan)-aptamer sequence for specific and efficient drug loading and a GO-binding 12-mer oligo A sequence. PA-GO hybrid hydrogels exhibited a bird's nest-like surface morphology, a swelling ratio of 657% at 2 h, and viscoelasticity suitable for injection and retention. PA-GO hydrogel was degraded by deoxyribonuclease I. PA-GO hybrid hydrogels specifically bound Kan, exhibiting a drug loading efficiency of 58.0% for Kan compared with 1.5% for gentamicin. Kan-loaded PA-GO (Kan/PA-GO) hybrid hydrogels exerted antibacterial activity against gram-negative ( Escherichia coli ) and gram-positive ( Staphylococcus aureus ) bacteria. In mice, subcutaneously injected, fluorescent Kan-loaded PA-GO hybrid hydrogel was retained at the injection site and degraded with time. Our findings suggest the potential of PA-GO hybrid hydrogels constructed by single-step RCA for biomedical applications." @default.
- W2334355871 created "2016-06-24" @default.
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- W2334355871 date "2016-08-01" @default.
- W2334355871 modified "2023-09-24" @default.
- W2334355871 title "Biodegradable graphene oxide and polyaptamer DNA hybrid hydrogels for implantable drug delivery" @default.
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- W2334355871 doi "https://doi.org/10.1016/j.carbon.2016.04.014" @default.
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