Remote Ischemic Preconditioning Enhances Skin Flap Survival via ZNF667/SDF1-Mediated Endothelial Progenitor Cells...

Area of Science:

• Regenerative Medicine
• Vascular Biology
• Molecular Mechanisms of Disease

Background:

• Flap transplantation is crucial for wound reconstruction.
• Mechanisms of remote ischemic preconditioning (RIPC) improving flap survival are not fully understood.

Purpose of the Study:

• To elucidate the molecular mechanisms by which RIPC enhances flap survival.

Main Methods:

• Established an ischemia/reperfusion (I/R) rat model.
• Applied RIPC via limb clamping.
• Utilized high-throughput sequencing, cellular assays, and live imaging to analyze gene expression and flap viability.

Main Results:

• RIPC increased ZNF667 expression, which repressed VHL transcription.
• Reduced VHL led to increased hypoxia-inducible factor-1α (HIF-1α) and stromal cell-derived factor 1 (SDF1) expression.
• This promoted endothelial progenitor cell (EPC) proliferation, migration, and differentiation, enhancing angiogenesis and reducing flap necrosis.

Conclusions:

• RIPC improves flap survival via the ZNF667-VHL-SDF1 pathway, augmenting EPC function.
• Findings offer a potential therapeutic strategy for flap transplantation and deepen understanding of flap survival mechanisms.