Protein-Engineered Large Area Adipose-derived Stem Cell Sheets for Wound Healing

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Stem Cell Biology

Background:

• Human adipose-derived stem cells (hADSCs) are promising for regenerative therapies.
• Developing methods for harvesting large, functional stem cell sheets is crucial for clinical applications.
• Cell adhesion molecules (CAMs) play a vital role in cell-cell and cell-substrate interactions.

Purpose of the Study:

• To engineer hADSCs with soluble cell adhesive molecules (CAMs) for enhanced sheet formation and harvesting.
• To investigate the effect of fibronectin (FN) on hADSC proliferation and adhesion.
• To evaluate the therapeutic efficacy of engineered hADSC sheets in a wound healing model.

Main Methods:

• hADSCs were engineered with soluble fibronectin (FN) at 100 pg/ml.
• A photothermal method was used to harvest free-standing hADSC sheets (122.6 mm²).
• A collagen layer was utilized to protect cells during photothermal harvesting.

Main Results:

• FN enhanced hADSC proliferation and controlled cell interactions.
• Transferable hADSC sheets were successfully harvested using the photothermal method.
• In vivo application in diabetic db/db mice resulted in 30% faster wound closure compared to controls.

Conclusions:

• Engineering hADSCs with CAMs and collagen facilitates efficient sheet harvesting.
• This approach holds potential for developing various stem cell sheet therapies for enhanced healing.
• The study demonstrates a viable method for generating therapeutic stem cell sheets.