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The treatment of diabetic wounds remains a major challenge in clinical practice, with chronic wounds characterized by multiple drug-resistant bacterial infections, angiopathy, and oxidative damage to the microenvironment. Herein, a novel in situ injectable HA@MnO 2 /FGF-2/Exos hydrogel is introduced for improving diabetic wound healing. Through a simple local injection, this hydrogel is able to form a protective barrier covering the wound, providing rapid hemostasis and long-term antibacterial protection. The MnO 2 /ε-PL nanosheet is able to catalyze the excess H 2 O 2 produced in the wound, converting it to O 2 , thus not only eliminating the harmful effects of H 2 O 2 but also providing O 2 for wound healing. Moreover, the release of M2-derived Exosomes (M2 Exos) and FGF-2 growth factor stimulates angiogenesis and epithelization, respectively. These in vivo and in vitro results demonstrate accelerated healing of diabetic wounds with the use of the HA@MnO 2 /FGF-2/ Exos hydrogel, presenting a viable strategy for chronic diabetic wound repair.
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