Increase of plasma IL-9 and decrease of plasma IL-5, IL-7, and IFN-γ in patients with chronic heart failure

Area of Science:

• Cardiology
• Immunology
• Biochemistry

Background:

• Cytokines play a role in chronic heart failure (CHF) development and progression.
• Understanding cytokine networks in CHF is crucial for therapeutic strategies.
• Disease etiology may influence specific cytokine expression patterns in CHF.

Purpose of the Study:

• To investigate cytokine networks in patients with stable CHF.
• To compare cytokine expression based on CHF etiology (ischaemic vs. non-ischaemic dilated cardiomyopathy).
• To correlate cytokine levels with echocardiographic parameters and disease duration.

Main Methods:

• Plasma levels of 27 pro- and anti-inflammatory mediators were analyzed.
• Multiplex immunoassay was used for cytokine quantification.
• Patients with ischaemic cardiomyopathy (ICM) and non-ischaemic dilated cardiomyopathy (NIDCM) were compared to controls.

Main Results:

• Increased plasma levels of Macrophage inflammatory protein (MIP)-1β, Vascular endothelial growth factor (VEGF), Interleukin (IL)-9, Monocyte chemotactic protein (MCP)-1, and IL-8 were observed in both ICM and NIDCM groups compared to controls.
• Decreased plasma levels of IL-7, IL-5, and Interferon (IFN)-γ were found in both ICM and NIDCM groups versus controls.
• IL-9 inversely correlated with left ventricular ejection fraction in ICM patients; IL-5 inversely correlated with disease duration in NYHA III/IV ICM patients.

Conclusions:

• Elevated plasma IL-9 and reduced IL-5, IL-7, and IFN-γ in ICM and NIDCM patients may elucidate inflammatory pathways in CHF.
• These findings highlight specific cytokine alterations in CHF, potentially linked to disease severity and etiology.
• Further research into these cytokine networks could inform novel therapeutic approaches for chronic heart failure.