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Issue 3, 2018
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Biodegradable pH-responsive hydrogels for controlled dual-drug release

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Abstract

Dual-drug loaded pH-responsive hydrogels were prepared as a delivery system carrying, as exemplars, both anti-cancer and anti-bacterial agents for pH controlled drug release. The hydrogels were composed of poly(L-lactide)-co-polyethyleneglycol-co-poly(L-lactide) dimethacrylates (with various molecular weights of L-lactide oligomers) as a macromolecular crosslinker and copolymerized with acrylic acid and N-isopropylacrylamide. The biodegradability, biocompatibility and mechanical properties of the hydrogels were characterized with the hydrogels being nontoxic to cells, while showing a reversible >80% reduction in volume at pH 1.2 compared to pH 7.4. Drug release profiles showed differential release of tetracycline over doxorubicin at pH 1.2, with both drugs being released equally at pH 7.4. Biodegradability was tunable by altering the crosslinking density and pH, with the total degradation of the best gels observed within 2 weeks at pH 7.4.

Graphical abstract: Biodegradable pH-responsive hydrogels for controlled dual-drug release

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Supplementary files

Article information


Submitted
09 Jul 2017
Accepted
15 Dec 2017
First published
18 Dec 2017

J. Mater. Chem. B, 2018,6, 510-517
Article type
Paper

Biodegradable pH-responsive hydrogels for controlled dual-drug release

L. Xu, L. Qiu, Y. Sheng, Y. Sun, L. Deng, X. Li, M. Bradley and R. Zhang, J. Mater. Chem. B, 2018, 6, 510
DOI: 10.1039/C7TB01851G

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