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Photo-crosslinkable amniotic membrane hydrogel for skin defect healing
Qiang Zhang1, Caiwang Chang2, Chunyu Qian3
1The First Affiliated Hospital of Soochow University, Soochow University, 188 Shizi St, Suzhou, Jiangsu 215006, P.R. China; The Affiliated Hospital of Yangzhou University, Yangzhou University, 368 Hanjiang Middle Road, Yangzhou, Jiangsu 225000, P.R. China.
This study developed a novel GelMA-dHAMMA composite hydrogel from decellularized human amniotic membrane (dHAM) and methacrylated gelatin (GelMA). This biomaterial enhances skin wound healing by improving mechanical properties and promoting tissue regeneration.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Human amniotic membrane (HAM) is a biocompatible material used in tissue engineering.
- Decellularized HAM (dHAM) offers bioactive substances but has limitations like poor mechanical properties and rapid degradation.
- Existing dHAM limitations hinder its use for large-area or full-thickness skin defect healing.
Purpose of the Study:
- To develop an improved biomaterial for skin tissue engineering by overcoming dHAM limitations.
- To create a photocrosslinked composite hydrogel enhancing mechanical properties and biological activity.
- To evaluate the efficacy of the new hydrogel in promoting skin wound healing.
Main Methods:
- Decellularized human amniotic membrane (dHAM) was modified with methacrylic anhydride (MA) to form dHAMMA.
- dHAMMA was blended with methacrylated gelatin (GelMA) and a photosensitizer.
- The mixture was photocrosslinked to form the GelMA-dHAMMA composite hydrogel with a bicomponent polymer network structure.
Main Results:
- The GelMA-dHAMMA hydrogel exhibited enhanced physical and chemical properties, including a porous structure.
- In vitro studies showed promotion of fibroblast proliferation and α-smooth muscle actin (α-SMA) expression.
- In vivo investigations demonstrated accelerated wound healing, increased collagen deposition, and enhanced angiogenesis.
Conclusions:
- The GelMA-dHAMMA composite hydrogel overcomes the limitations of dHAM, offering improved mechanical strength and slower degradation.
- This novel biomaterial effectively promotes skin regeneration and reconstruction for large-area or full-thickness defects.
- GelMA-dHAMMA represents a promising advancement in biomaterials for skin tissue engineering applications.
