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Thermosensitive glycol chitosan-based hydrogel as a topical ocular drug delivery system for enhanced ocular bioavailability.

08:00 EDT 9th September 2019 | BioPortfolio

Summary of "Thermosensitive glycol chitosan-based hydrogel as a topical ocular drug delivery system for enhanced ocular bioavailability."

In the present study, we developed and evaluated an in situ gelling system based on hexanoyl glycol chitosan (H-GCS) for enhanced ocular bioavailability. An aqueous solution of H-GCS exhibited a typical sol-gel transition at 32 °C. The formed H-GCS hydrogel was characterized by rheology and scanning electron microscopy (SEM). H-GCS had minimal in vitro cytotoxicity against L-929 and HCEC cells over a concentration range of 0-0.8 mg/mL. Additionally, the H-GCS hydrogel exhibited good ocular tolerance and biocompatibility after a single instillation. Moreover, H-GCS hydrogel significantly prolonged the precorneal retention of fluorescein sodium compared with its aqueous solution. An in vivo pharmacokinetic study demonstrated that the levofloxacin-loaded H-GCS hydrogel could provide a significantly higher C and AUC compared with the levofloxacin aqueous solution, thus increasing ocular bioavailability. Overall, the proposed H-GCS hydrogel acts as an in situ gelling system that might represent a promising vehicle for topical ocular drug delivery.

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This article was published in the following journal.

Name: International journal of pharmaceutics
ISSN: 1873-3476
Pages: 118688

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