Thermosensitive hybrid hyaluronan/p(HPMAm‐lac)‐PEG hydrogels enhance cartilage regeneration in a mouse model of osteoarthritis. Issue 11 (9th April 2019)

• Record Type: Journal Article
• Authors: Agas, Dimitrios; Laus, Fulvio; Lacava, Giovanna; Marchegiani, Andrea; Deng, Siyuan; Magnoni, Federico; Silva, Guilherme Gusmão; Di Martino, Piera; Sabbieti, Maria Giovanna; Censi, Roberta
• Is Part Of: Journal of cellular physiology. Volume 234:Issue 11(2019:Nov.)
• Page Start: 20013
• Page End: 20027
• Publication Date: 2019-04-09
• Subjects: controlled release -- degradation -- hyaluronic acid -- osteoarthritis -- thermosensitive hydrogels; Physiology -- Periodicals; Cell physiology -- Periodicals; 571.6
• DOI: 10.1002/jcp.28598
• Languages: English
• ISSNs: 0021-9541

Abstract

Abstract: Osteoarthritis (OA), due to cartilage degeneration, is one of the leading causes of disability worldwide. Currently, there are not efficacious therapies to reverse cartilage degeneration. In this study we evaluated the potential of hybrid hydrogels, composed of a biodegradable and thermosensitive triblock copolymer cross‐linked via Michael addition to thiolated hyaluronic acid, in contrasting inflammatory processes underlying OA. Hydrogels composed of different w/w % concentrations of hyaluronan were investigated for their degradation behavior and capacity to release the polysaccharide in a sustained fashion. It was found that hyaluronic acid was controllably released during network degradation with a zero‐order release kinetics, and the release rate depended on cross‐link density and degradation kinetics of the hydrogels. When locally administered in vivo in an OA mouse model, the hydrogels demonstrated the ability to restore, to some extent, bone remineralization, proteoglycan production, levels of Sox‐9 and Runx‐2. Furthermore, the downregulation of proinflammatory mediators, such as TNF‐α, NFkB, and RANKL and proinflammatory cytokines was observed. In summary, the investigated hydrogel technology represents an ideal candidate for the potential encapsulation and release of drugs relevant in the field of OA. In this context, the hydrogel matrix could act in synergy with the drug, in reversing phenomena of inflammation, cartilage disruption, and bone demineralization associated with OA. Abstract : The controlled release of hyaluronan from the hybrid hydrogels reverses the cartilage degradation.