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- W2588188490 abstract "Microspheres can be regarded as a suitable platform for the development of ad hoc drug delivery systems, since the targeted release of a therapeutic agent can effectively contribute to support and improve a pharmacological protocol. However, several crucial factors related to the selection of materials, drugs and fabrication techniques should be critically analyzed in order to enhance the expected performance. Dealing with highly compatible materials, e.g. naturally-derived polymers and “green” reagents, can be a valid approach. For this aim, gelatin, chitosan and blend microspheres were produced by emulsion technique simply using distilled water and olive oil. Necessarily, due to the intrinsic instability of the selected materials in aqueous environment, microspheres were cross-linked with genipin, an extremely low cytotoxic agent, at three different concentration (i.e., 0.1, 0.5, 1% w/v). Collected microspheres were then loaded with methylene blue (MB), as drug model. Morphological analysis revealed homogeneous microspheres characterized by an average diameter comprised in the range 42–54 μm. In vitro MB temporal delivery was assessed until complete release, which occurred in about 3 days for gelatin and 30 days for chitosan microspheres. Nanoindentation analysis was performed to evaluate how polymers and genipin influenced the mechanical properties of microspheres. Finally, the effect of released MB was investigated by means of chicken embryo chorioallantoic membrane assay, highlighting anti-angiogenic properties for gelatin differently from chitosan and blend microspheres." @default.
- W2588188490 created "2017-02-24" @default.
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- W2588188490 date "2017-06-01" @default.
- W2588188490 modified "2023-09-23" @default.
- W2588188490 title "Natural polymeric microspheres for modulated drug delivery" @default.
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- W2588188490 doi "https://doi.org/10.1016/j.msec.2017.02.051" @default.
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