Glycocalyx Degradation and Inflammation in Cardiac Surgery

Area of Science:

• Cardiovascular Surgery
• Biomedical Engineering
• Inflammation Research

Background:

• The glycocalyx, a protective layer on the endothelium, is susceptible to degradation during inflammatory processes.
• Cardiac surgery involving cardiopulmonary bypass (CPB) is known to induce systemic inflammation.
• Understanding the relationship between inflammation and glycocalyx integrity is crucial for patient outcomes.

Purpose of the Study:

• To investigate the hypothesis that inflammation is a key factor in glycocalyx degradation in patients undergoing cardiac surgery with CPB.
• To quantify the association between specific inflammatory markers and glycocalyx degradation biomarkers.

Main Methods:

• A prospective observational study involving two patient cohorts (30 and 35 patients).
• Blood samples were collected at multiple perioperative time points.
• Plasma concentrations of syndecan-1 (a glycocalyx degradation biomarker) and cytokines (IL-6, IL-8, IL-10) were measured.

Main Results:

• Plasma syndecan-1 levels significantly increased during cardiac surgery with CPB, correlating with elevated levels of IL-6, IL-8, and IL-10.
• Preoperative syndecan-1 concentrations were associated with IL-6, IL-8, and IL-10, findings confirmed in a separate cohort.
• The correlation between syndecan-1 and cytokines was observed preoperatively and postoperatively, but not intraoperatively.

Conclusions:

• Inflammation, characterized by increased pro-inflammatory (IL-6, IL-8) and anti-inflammatory (IL-10) cytokines, is associated with glycocalyx degradation in patients undergoing cardiac surgery with CPB.
• Plasma syndecan-1 serves as a reliable indicator of glycocalyx degradation in this context.
• These findings underscore the impact of inflammation on endothelial integrity during CPB.