Application of Stem Cells Shows Antiinflammatory Effect in an Irradiated Random Pattern Flap Model

Area of Science:

• Regenerative Medicine
• Tissue Engineering
• Surgical Oncology

Background:

• Local flaps in reconstructive surgery risk necrosis, especially post-irradiation for tumor treatment.
• Stem cell application is a potential strategy to enhance flap perfusion and survival.

Purpose of the Study:

• To investigate the efficacy of different stem cell types in improving the survival of irradiated random pattern fasciocutaneous flaps in rats.
• To evaluate the anti-inflammatory and tissue-preserving effects of stem cell treatments.

Main Methods:

• Rats underwent bilateral fasciocutaneous flap surgery, with one flap irradiated (20 Gy) and the other serving as control.
• Four stem cell mixtures (ASCs, ASC-HUVECs, MSCs, MSC-HUVECs) were applied under flaps using fibrin glue.
• Flap necrosis, size, and molecular markers (CD68, ERG, Interleukin 6, HIF-1α, VEGF) were analyzed.

Main Results:

• Stem cell applications (ASCs, ASC-HUVECs, MSCs) reduced CD68+ inflammatory cells.
• HIF-1α expression was elevated in the ASC group.
• Mesenchymal stem cells (MSCs) and MSC-HUVECs prevented flap shrinkage.

Conclusions:

• ASCs, MSCs, and ASC-HUVECs demonstrated anti-inflammatory effects.
• MSCs and MSC-HUVECs effectively prevented early flap shrinkage, suggesting therapeutic potential in reconstructive surgery.