Cited by 225Wound Healing and TreatmentsExtracellular vesicles in diseaseTissue Engineering and Regenerative Medicine

VH298-loaded extracellular vesicles released from gelatin methacryloyl hydrogel facilitate diabetic wound healing by HIF-1α-mediated enhancement of angiogenesis

Wang, Yaxi, Cao, Zhen, Wei, Qian, Ma, Kui, Hu, Wenzhi, Huang, Qilin, Su, Jianlong, Li, Haihong +2 more·2022·Acta Biomaterialia

Abstract

Endothelial malfunction is responsible for impaired angiogenesis in diabetic patients, thereby causing the delayed healing progress of diabetic wounds. Exosomes or extracellular vesicles (EVs) have emerged as potential therapeutic vectors carrying drug cargoes to diseased cells. In the present study, EVs were reported as a new treatment for diabetic wounds by delivering VH298 into endothelial cells. Firstly, EVs derived from epidermal stem cells (ESCs) were loaded with VH298 (VH-EVs), and the characteristics of VH-EVs were identified. VH-EVs showed promotive action on the function of human umbilical vein endothelial cells (HUVECs) in vitro by activating HIF-1α signaling pathway. VH-EVs were also found to have a therapeutic effect on wound healing and angiogenesis in vivo. We further fabricated gelatin methacryloyl (GelMA) hydrogel for sustained release of VH-EVs, which possessed high biocompatibility and proper mechanical properties. In diabetic mice, GelMA hydrogel containing VH-EVs (Gel-VH-EVs) effectively promoted wound healing by locally enhancing blood supply and angiogenesis. The underlying mechanism for enhanced angiogenesis was possibly associated with the activation of HIF-1α/VEGFA signaling pathway. Collectively, our findings suggest a promising EV-based strategy for the VH298 delivery to endothelial cells and provide a new bioactive dressing for diabetic wound treatment. STATEMENT OF SIGNIFICANCE: The angiogenic dysfunction is the main cause of diabetic wound unhealing. Extracellular vesicles (EVs) have been reported to be helpful but their efficacy is limited for angiogenesis in cutaneous regeneration. VH298 holds great promise to improve angiogenesis by stabilizing HIF-1α which is reported at low level in diabetic wounds. Here, we loaded EVs with VH298 (VH-EVs) to exert an on-target enhancement of proangiogenic capacity in diabetic wound. Then, we applied a photo-crosslinkable hydrogel, gelatin methacryloyl (GelMA) containing VH-EVs (Gel-VH-EVs) as a convenient biomaterial and an adaptable scaffold for sustained releasing VH-EVs. The results showed significant therapeutic effect of Gel-VH-EVs on skin defect repair. Our findings suggest a promising EVs-based drug delivery strategy and a new functional wound dressing for patients.

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Crossref · 10.1016/j.actbio.2022.05.018

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  • VH-EV promoted function of HUVECs in vitro through HIF-1α signaling and displayed great therapeutic effects on skin regeneration.

    “Similarly, Wang et al. loaded epidermal stem cell (ESC)-derived exosomes with VH298 (VH-EV), and VH-EV was shown to promote the function of HUVECs in vitro through HIF-1α signaling. This special exosome displayed great therapeutic effects on skin regeneration [106].”

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Authors
Wang, Y., Cao, Z., Wei, Q., Ma, K., Hu, W., Huang, Q., Su, J., Li, H., Zhang, C., & Fu, X.
Affiliations
  • Chinese PLA General Hospital (CN)
  • Chinese Academy of Medical Sciences & Peking Union Medical College (CN)
  • Nankai University (CN)
  • Hubei University of Medicine (CN)
Corresponding author
  • Li, Haihong
  • Zhang, Cuiping
  • Fu, Xiaobing
Venue
Acta Biomaterialia
Publisher
Elsevier BV
Published
2022-07
Volume
147
Pages
342-355
ISSN
1742-7061 (ISSN-L)
OpenAlex
W4280530584
Cited by
225
References
50
Citations by year
2026: 39 · 2025: 54 · 2024: 58 · 2023: 62 · 2022: 12
FWCI
20.08
Type
journal article
Language
en
Open access
closed
Locations
  • Acta Biomaterialia (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Beijing Municipal Natural Science Foundation (7202197)
  • National Natural Science Foundation of China (81830064, 82172231, 82172211, 82103507)
  • CAMS Innovation Fund for Medical Sciences
  • Chinese Academy of Meteorological Sciences (2019-I2M-5\u2013059)
Topics
  • Health Sciences › Medicine › Rehabilitation › Wound Healing and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Extracellular vesicles in disease
  • Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
Keywords
extracellular vesicles, diabetic wound healing, angiogenesis, HIF-1α, gelatin methacryloyl hydrogel, epidermal stem cells, endothelial cells, VEGF-A signaling, sustained drug release, wound dressings, endothelial dysfunction
MeSH terms
Extracellular Vesicles, Animals, Cyclopropanes, Diabetes Mellitus, Experimental, Gelatin, Humans, Methacrylates, Neovascularization, Pathologic, Pyrrolidines, Thiazoles, Wound Healing, Hydrogels, Mice, Hypoxia-Inducible Factor 1, alpha Subunit, Human Umbilical Vein Endothelial Cells

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