期刊
SMALL
卷 18, 期 1, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202104229
关键词
diabetes; exosome delivery; injectable hydrogels; redox homeostasis; wound healing
类别
资金
- National Science Foundation of China [82072444, 82002313]
- National Key Research & Development Program of China [2018YFC2001502, 2018YFB1105705]
- China Postdoctoral Science Foundation [2021TQ0118]
- Department of Science and Technology of Hubei Province [2020BCB004]
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration [2020kqhm008]
- Health Commission of Hubei Province [WJ2019Z009]
- Wuhan Union Hospital Pharmaceutical Technology nursing special fund [2019xhyn021]
The novel HA@MnO2/FGF-2/Exos hydrogel can improve diabetic wound healing by forming a protective barrier and providing long-term antibacterial protection, while utilizing MnO2/ε-PL nanosheets to catalyze H2O2 conversion to O-2, releasing M2 Exos and FGF-2 to promote the healing process.
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@MnO2/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 MnO2/epsilon-PL nanosheet is able to catalyze the excess H2O2 produced in the wound, converting it to O-2, thus not only eliminating the harmful effects of H2O2 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@MnO2/FGF-2/Exos hydrogel, presenting a viable strategy for chronic diabetic wound repair.
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