Neopterin predicts cardiac dysfunction following cardiac surgery

Area of Science:

• Cardiology
• Biomarkers
• Inflammation Research

Background:

• Cardiac dysfunction post-surgery is linked to oxidative stress and inflammation.
• Investigating inflammatory biomarkers may improve understanding and prediction of this complication.

Purpose of the Study:

• To determine if C-reactive protein (CRP), lactoferrin, neopterin, and terminal complement complex (TCC) are associated with cardiac dysfunction after cardiac surgery.
• To assess if these biomarkers enhance the prediction of postoperative cardiac dysfunction beyond clinical variables.

Main Methods:

• Prospective collection of clinical data and plasma samples from 1018 cardiac surgery patients.
• Logistic regression analysis to evaluate associations between biomarkers and cardiac dysfunction, adjusting for clinical factors.
• Utilized likelihood ratio test and integrated discrimination improvement to assess predictive value.

Main Results:

• Neopterin was the sole biomarker significantly associated with postoperative cardiac dysfunction (OR 2.73).
• Neopterin improved risk prediction compared to clinical variables alone (P < 0.0001 for LRT, P = 0.02 for IDI).
• Enhanced prediction was particularly notable in intermediate-risk patient groups.

Conclusions:

• Neopterin is associated with cardiac dysfunction following cardiac surgery and improves predictive accuracy.
• Findings support the role of oxidative stress and inflammation in postoperative cardiac dysfunction.
• Routine neopterin measurement is not yet recommended, but warrants further investigation.