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Chiral Hydrogel Accelerates Re-epithelization in Chronic Wounds via Mechanoregulation.
Advanced Healthcare Materials 2022 September 3
Chronic wound, such as diabetic foot ulcers (DFU), is a serious clinical problem. It has been a challenge for the conventional wound dressings to achieve the desirable therapeutic efficacy due to the lack of biomimetic structural environment for rapid re-epithelization. Inspired by the naturally existing chiral structures in skin, a novel amino acid based chiral hydrogel dressing is developed, consisting left-handed or right-handed helical fibers self-assembled by L/D-phenylalanine derivatives. Compared to the levorotatory chiral hydrogel (LH), the dextral chiral hydrogel (DH) shows the ability to enhance cell adhesion, proliferation and migration, and strongly promotes diabetic wound healing and re-epithelialization with a drug-free mode. Interestingly, the dextral chiral hydrogel is able to actively increase adsorption of type I collagen and promote proliferation and migration of keratinocyte in an integrin and YAP-mediated manner. This study not only provides a novel strategy for treatment of chronic wound by utilizing dextral chiral hydrogel dressings, but also unveils the molecular mechanism for effect of dextral chiral structures on the promoted proliferation of keratinocyte. This article is protected by copyright. All rights reserved.
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