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Recent progress in alginate-based carriers for ocular targeting of therapeutics

期刊

FOOD HYDROCOLLOIDS FOR HEALTH
卷 2, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.fhfh.2022.100071

关键词

Alginate; Ocular delivery; Ophthalmic targeting; Gelation; In situ gels

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The field of ocular drug delivery presents a challenge to pharmaceutical researchers. Alginate, a naturally occurring polysaccharide, has been extensively investigated in drug delivery as it can increase ocular residence time through ion-sensitive in situ gelation, while also being non-toxic and biodegradable.
Eye is one of the susceptible organs of the human body which is associated with several internal organs including the brain. Due to the protective mechanisms of body and ocular barrier properties, the area of ocular drug delivery presents a challenge to pharmaceutical researchers. Alginate is a naturally occurring polysaccharide obtained from marine brown seaweeds and bacterial sources. According to the Food and Drug Administration, (FDA) alginate is generally recognized as safe (GRAS). It is widely used as a gelling agent and thickener in the food industries. In the field of drug delivery, alginate is extensively investigated as an excipient. In ocular targeting of therapeutics, sodium alginate offers many advantages including ion sensitive in situ gelation, non-toxic and biodegradable behaviour in combination with mucoadhesive nature of the polymer. The instant gelation ability of alginate allows it to increase the ocular residence time and enhances the ocular drug bioavailability reducing the requirement of frequent administration of drug. The abundant availability and attractive physicochemical properties of alginate has encouraged pharmaceutical scientists to explore newer strategies in ocular drug targeting. In this review, the efficacy of alginate in delivering various therapeutic agents has been discussed.

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