Objective To identify the potential immune biomarkers of critical limb ischemia(CLI)in patients with diabetes.Methods From January 2018 to December 2023,102 patients who were definitely diagnosed as CLI and diabetes foot ulcers(DFU)requiring percutaneous transluminal angioplasty and foot surgery were enrolled.Serum levels of 18 cellular immune and inflammatory factors including soluble CD40 ligand(sCD40L),IFN-α,IFN-γ,IL-2,IL-4,IL-6,IL-8,IL-10,IL-13,IL-18,et cetera,were measured in these patients.Results The levels of circulating serum sICAM-1 and endothelin-1 showed a negative correlation with the recovery of DFU.Moreover,PAI-1 and endothelin-1 were related to the demand for neovascular reconstruction.The circulating serum levels of thrombomodulin and sCD40L were associated with new and recurrent lesions.Conclusion The level of circulating biomarkers related to the immunity of vascular endothelial cell can be used to predict the risk of new or recurrent CLI in patients with diabetes.

Objective To identify the potential immune biomarkers of critical limb ischemia(CLI)in patients with diabetes.Methods From January 2018 to December 2023,102 patients who were definitely diagnosed as CLI and diabetes foot ulcers(DFU)requiring percutaneous transluminal angioplasty and foot surgery were enrolled.Serum levels of 18 cellular immune and inflammatory factors including soluble CD40 ligand(sCD40L),IFN-α,IFN-γ,IL-2,IL-4,IL-6,IL-8,IL-10,IL-13,IL-18,et cetera,were measured in these patients.Results The levels of circulating serum sICAM-1 and endothelin-1 showed a negative correlation with the recovery of DFU.Moreover,PAI-1 and endothelin-1 were related to the demand for neovascular reconstruction.The circulating serum levels of thrombomodulin and sCD40L were associated with new and recurrent lesions.Conclusion The level of circulating biomarkers related to the immunity of vascular endothelial cell can be used to predict the risk of new or recurrent CLI in patients with diabetes.