Circulating stem cells, HIF-1, and SDF-1 in septic abdominal surgical patients: randomized controlled study protocol

Area of Science:

• Critical care medicine
• Stem cell biology
• Sepsis research

Background:

• Sepsis from complicated intra-abdominal infections carries high mortality.
• Endothelial barrier dysfunction, inflammation, and hypoxia are key sepsis contributors.
• The role of endothelial progenitor cells (EPCs) and their mobilization pathways in sepsis remains unclear.

Purpose of the Study:

• To determine the time course of circulating EPCs (CD133/CD34), SDF-1a, and HIF-1 in septic patients undergoing major abdominal surgery.
• To investigate the interrelationship between EPCs, HIF-1, and SDF-1a.
• To explore the association of these factors with patient outcomes under conventional therapy (CT) or CT with hemoperfusion (HCT).

Main Methods:

• Prospective randomized clinical trial involving septic (group S) and non-septic (group C) postoperative patients, plus healthy volunteers (group H).
• Group S patients were randomized to CT alone or CT with HCT (S2).
• Peripheral blood samples collected at multiple time points to quantify CD34/133 cells and HIF-1 via flow cytometry, and SDF-1a via ELISA.

Main Results:

• Data on circulating EPCs, SDF-1a, and HIF-1 levels over time in septic patients.
• Analysis of correlations between CD133/CD34, HIF-1, and SDF-1a.
• Evaluation of the relationship between these biomarkers and treatment outcomes (CT vs. HCT).

Conclusions:

• This trial investigates circulating stem cells and hypoxia-related factors in septic patients.
• Understanding these molecular pathways could guide strategies to restore immune homeostasis.
• EPC function in sepsis offers potential for novel diagnostic and therapeutic advancements.