ArticleAsian journal of pharmaceutical sciences2024
Intravitreal long-term sustained ranibizumab delivery using injectable microgel-embedded hydrogel.
Article in Asian journal of pharmaceutical sciences, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Hydrogel-Based Ocular Drug Delivery Systems: A Bibliometric and Visualization Analysis of Research Trends and Hotspots (1991-2025).Pharmaceutics · 2026Article
- Hydroxysafflor Yellow A for Diabetic Retinopathy: A Critical Review of Retinal Neurovascular Mechanisms and Systemic-to-Ocular Pharmacokinetic Barriers.Antioxidants (Basel, Switzerland) · 2026Review
- Magnetic continuum soft robot-driven precise delivery of prodrug nanoassemblies for gastric cancer chemo-immunotherapy.Asian journal of pharmaceutical sciences · 2025Article
- Biohybrid corneal stromal tissue formation using keratocytes encapsulated in supramolecular microgels.Materials today. Bio · 2025Article
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Authors and funding
8 authors.
Funding
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Abstract
Retinal vascular disease is the leading cause of visual impairment. Although intravitreal drug injections are the most suitable approach for addressing retinal disorders, existing clinical treatments necessitate repeated administration, imposing a substantial burden on patients with various intraocular complications. This study introduces an injectable and biodegradable hyaluronan microgel (Hm)-embedded gelatin-poly(ethylene glycol)-tyramine hydrogel (HmGh) designed for sustained intravitreal ranibizumab (RBZ) delivery to reduce patient burden and minimize the side effects associated with frequent injections. Hm exhibited a controlled RBZ loading capacity and release profile. HmGh effectively controlled the initial burst release and overall release profile. Cytocompatibility and cellular drug efficacy were also demonstrated. In an animal study, HmGh maintained RBZ concentrations in the vitreous and retina for >120 d. Pharmacokinetic studies showed that the half-life of RBZ-loaded HmGh in the vitreous and retina was 2.55 and 2.05 times longer than that of RBZ-loaded Hm, respectively, and 9.58 and 38.46 times longer than that of RBZ solution, respectively. Importantly, the initial RBZ elimination from HmGh to the aqueous humor was significantly reduced compared to that from the Hm and RBZ solutions. Intraocular degradation and safety were comprehensively evaluated using fundus imaging and histological analyses. In conclusion, this injectable microgel-embedded hydrogel formulation is a promising prolonged drug delivery system for treating various posterior segment eye diseases.
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