Interleukin-37 elevation in patients with atrial fibrillation

Area of Science:

• Cardiology
• Immunology
• Biochemistry

Background:

• Inflammation is a key factor in atrial fibrillation (AF) development.
• Interleukin-37 (IL-37) is an emerging anti-inflammatory cytokine.

Purpose of the Study:

• To investigate the role of IL-37 in AF pathogenesis.
• To assess IL-37 as a potential diagnostic marker for AF.

Main Methods:

• Measured IL-37 mRNA and serum protein levels in AF patients and controls using RT-PCR and ELISA.
• Stimulated peripheral blood mononuclear cells (PBMCs) from AF patients with IL-37.
• Quantified pro-inflammatory cytokines IL-6 and C-reactive protein.

Main Results:

• Elevated IL-37 mRNA and serum levels were observed in AF patients compared to healthy controls.
• Higher IL-37 levels were found in paroxysmal and persistent AF subgroups versus permanent AF.
• In vitro, IL-37 suppressed IL-6 and C-reactive protein production in AF patient PBMCs.

Conclusions:

• IL-37 is significantly elevated in AF patients, with expression linked to specific AF subtypes.
• IL-37 presents a novel research avenue for understanding AF pathogenesis and developing targeted therapies.
• This study provides the first evidence of increased IL-37 levels in individuals with atrial fibrillation.