Increased endothelial monocyte adhesiveness is related to clinical outcomes in chronic heart failure

Area of Science:

• Cardiovascular Medicine
• Immunology
• Pathophysiology

Background:

• Chronic heart failure (CHF) is associated with vascular inflammation and endothelial dysfunction.
• Activated peripheral blood mononuclear cells (PBMCs) and their adhesion to endothelium may play a role in CHF pathophysiology.
• This study investigates the clinical significance of PBMC activity in CHF patients.

Purpose of the Study:

• To investigate the clinical significance of PBMC activity in CHF patients.
• To determine if PBMC adhesiveness to endothelial cells correlates with disease severity and clinical outcomes.
• To explore the pathophysiological relevance of PBMC-endothelial cell interactions in CHF progression.

Main Methods:

• PBMCs were isolated from 34 CHF patients, 10 healthy controls, and 17 disease controls.
• PBMC adhesiveness to human aortic endothelial cells (HAECs) was measured with and without TNF-alpha stimulation.
• Major adverse cardiac events were tracked over a median follow-up of 182 days.

Main Results:

• PBMCs from severe CHF patients showed significantly higher adhesion to HAECs compared to controls and mild CHF patients.
• Endothelial adhesiveness of PBMCs positively correlated with circulating cell adhesion molecules (CAMs).
• Higher PBMC-endothelial cell adhesion levels were associated with significantly worse event-free survival (log rank test, p=0.0139).

Conclusions:

• Increased endothelial adhesiveness of PBMCs is a feature of severe CHF.
• This increased adhesiveness correlates with clinical outcomes, suggesting prognostic value.
• PBMC-endothelial cell interactions are likely pathophysiologically relevant to CHF progression.