Circulating adhesion molecules in pediatric cardiac surgery

Area of Science:

• Biomedical Engineering
• Immunology
• Cardiovascular Surgery

Background:

• Cardiopulmonary bypass (CPB) can induce systemic inflammation.
• Adhesion molecules like ELAM-1, ICAM-1, and VCAM-1 are key in inflammatory responses.
• Soluble forms of these molecules may indicate endothelial activation or damage.

Purpose of the Study:

• To compare plasma levels of soluble adhesion molecules (sELAM-1, sICAM-1, sVCAM-1) in pediatric versus adult cardiac surgery patients undergoing CPB.
• To assess the dynamic changes of these molecules during and after CPB in different age groups.

Main Methods:

• Prospective study comparing 15 children (<5 years) with adults undergoing cardiac surgery.
• Measurement of plasma sELAM-1, sICAM-1, and sVCAM-1 using enzyme-linked immunosorbent assays.
• Sampling at baseline, during CPB, end of surgery, and postoperative days 1 and 2.

Main Results:

• Pediatric patients exhibited significantly higher baseline levels of all three soluble adhesion molecules compared to adults.
• sELAM-1 and sICAM-1 levels were notably elevated in children, exceeding normal ranges.
• In children, adhesion molecule levels decreased during CPB and remained lower postoperatively, while adult levels showed minimal change.

Conclusions:

• Children undergoing CPB have distinct inflammatory profiles characterized by higher baseline soluble adhesion molecule levels.
• The observed decrease in soluble adhesion molecules during CPB in children suggests a unique inflammatory response pathway.
• These findings highlight age-dependent differences in endothelial activation during pediatric cardiac surgery.