CD14CD16 monocyte subset levels in heart failure patients

Area of Science:

• Immunology
• Cardiology
• Biochemistry

Background:

• Monocyte subsets play a role in inflammatory processes.
• Congestive heart failure (CHF) is associated with systemic inflammation.
• The specific distribution and function of monocyte subsets in CHF remain incompletely understood.

Purpose of the Study:

• To determine monocyte subset distribution in CHF patients.
• To assess if CHF severity correlates with specific monocyte subset expansion.
• To investigate the relationship between monocyte subsets, inflammation markers, and angiotensin-converting enzyme (ACE) expression.

Main Methods:

• Flow cytometry was used to analyze monocyte subsets (CD14, CD16, CD143/ACE) in 30 CHF patients and 26 controls.
• Enzyme-linked immunosorbent assay (ELISA) measured soluble CD146 levels.
• Clinical data including NYHA class, ejection fraction, pro-BNP, creatinine, GFR, and albumin were collected.

Main Results:

• CHF patients showed significantly higher CD14++ CD16+ monocyte frequency compared to controls.
• CD14++ CD16+ frequency increased with CHF severity (NYHA class, LV ejection fraction, pro-BNP) and correlated with renal function and albumin levels.
• Monocyte CD143 (ACE) expression was elevated in CHF and positively associated with CD14++ CD16+ monocytes.
• CD14+ CD16+ monocyte frequency was lower in CHF patients and negatively correlated with soluble CD146.

Conclusions:

• Increased monocytic CD14++ CD16+ frequency and CD143 (ACE) levels in CHF reflect disease status and cardiac deterioration.
• Depleted CD14+ CD16+ monocytes in CHF are linked to endothelial damage.
• Monocyte subset alterations may serve as important markers for exploring inflammatory pathways in CHF progression and risk prediction.