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Polymers 2014, 6(2), 346-369;

Hyaluronic Acid Bioconjugates for the Delivery of Bioactive Molecules

Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via F. Marzolo 5, Padova 35131, Italy
Fidia Farmaceutici SpA, Via Ponte della Fabbrica 3/A, Abano Terme, Padova 35031, Italy
Author to whom correspondence should be addressed.
Received: 3 December 2013 / Revised: 22 January 2014 / Accepted: 23 January 2014 / Published: 30 January 2014
(This article belongs to the Special Issue Polymers for Drug Delivery)
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Hyaluronic acid (HA) has currently several therapeutic applications: in ophthalmology, osteoarthritis, wound healing, tissue regeneration, postoperative anti-adhesion and anesthetic medicine. In the last ten years, it has also been successfully investigated in the field of drug delivery, in the form of conjugates or hydrogel depot systems. HAylation, the covalent conjugation of HA to bioactive molecules, allows the overcoming of disadvantages associated with some pharmaceuticals, such as insolubility, instability and fast kidney clearance. These issues can be addressed also by covalent attachment of polyethylene glycol (PEGylation), but HA has the relevant advantages of biodegradability, high loading and specific targeting. In this review, the novel HA derivatives and the latest advances in HA-based drug delivery with a particular focus on the chemistry of conjugation will be discussed. Although, so far, there are no HA-drug conjugates on the market, several derivatives are presently under clinical investigation, and the promising results encourage further investigations and the exploitation of this versatile polysaccharide. View Full-Text
Keywords: hyaluronic acid; biopharmaceuticals; polymer conjugation; low molecular weight drugs hyaluronic acid; biopharmaceuticals; polymer conjugation; low molecular weight drugs

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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Mero, A.; Campisi, M. Hyaluronic Acid Bioconjugates for the Delivery of Bioactive Molecules. Polymers 2014, 6, 346-369.

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