دورية أكاديمية
Development of thermosensitive poloxamer 407-based microbubble gel with ultrasound mediation for inner ear drug delivery
العنوان: | Development of thermosensitive poloxamer 407-based microbubble gel with ultrasound mediation for inner ear drug delivery |
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المؤلفون: | Ai-Ho Liao, Cheng-Ping Shih, Ming-Wei Li, Yi-Chun Lin, Ho-Chiao Chuang, Chih-Hung Wang |
المصدر: | Drug Delivery, Vol 28, Iss 1, Pp 1256-1271 (2021) |
بيانات النشر: | Taylor & Francis Group, 2021. |
سنة النشر: | 2021 |
المجموعة: | LCC:Therapeutics. Pharmacology |
مصطلحات موضوعية: | ultrasound, microbubbles, cavitation, thermosensitive gel, poloxamer 407, dexamethasone, Therapeutics. Pharmacology, RM1-950 |
الوصف: | Our previous study first investigated feasibility of applying ultrasound (US) and microbubbles (MBs) via external auditory canal to facilitate drug delivery into inner ear. However, most drugs are in aqueous formulae and eliminated via Eustachian tubes after drug application. In this study, feasibility of sustained release of thermosensitive poloxamer 407 (P407)-based MB gel for US mediation-enhanced inner ear drug (dexamethasone, DEX) delivery was investigated. The sol-to-gel transition temperature showed that mixture of DEX and only 10% and 12.5% P407 in MBs can be used for in vitro and in vivo drug delivery experiments. In in vitro Franz diffusion experiments, the release rates of 12.5% P407-MBs + US groups in the model using DEX as the delivered reagent at 3 h resulted in values 1.52 times greater than those of 12.5% P407-MBs groups. In guinea pigs, by filling tympanic bulla with DEX in 12.5% P407-MBs (DEX-P407-MBs), USMB applied at post-treatment days 1 and 7 induced 109.13% and 66.67% increases in DEX delivery efficiencies, respectively, compared to the group without US. On the 28th day after US-mediated P407-MB treatment, the safety assessment showed no significant changes in the hearing thresholds and no damage to the integrity of cochlea or middle ear. These are the first results to demonstrate feasibility of US-modified liquid form DEX-P407-MB cavitation for enhancing permeability of round window membrane. Then, a gel form of DEX-P407-MBs was generated and thus prolonged the release of DEX in middle ear to maintain the therapeutic DEX level in inner ear for at least 7 days. |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 1071-7544 1521-0464 10717544 |
Relation: | https://doaj.org/toc/1071-7544; https://doaj.org/toc/1521-0464 |
DOI: | 10.1080/10717544.2021.1938758 |
URL الوصول: | https://doaj.org/article/c0bf6260f3bb49de9982fb27321d63f0 |
رقم الأكسشن: | edsdoj.0bf6260f3bb49de9982fb27321d63f0 |
قاعدة البيانات: | Directory of Open Access Journals |
تدمد: | 10717544 15210464 |
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DOI: | 10.1080/10717544.2021.1938758 |