MicroRNA-126 Level Increases During Exercise Rehabilitation of Heart Failure with a Preserved Ejection Fraction

Area of Science:

• Cardiovascular Research
• Biomarker Discovery
• Exercise Physiology

Background:

• Heart failure with preserved ejection fraction (HFpEF) is a growing clinical challenge.
• MicroRNA-126 (miR-126) role in cardiovascular health requires further elucidation.
• Limited understanding exists regarding miR-126's response to therapeutic interventions in HFpEF.

Observation:

• Plasma miR-126 levels were significantly lower in HFpEF patients compared to healthy controls.
• HFpEF patients demonstrated reduced cardiac function, exercise tolerance, and quality of life.
• Baseline miR-126 levels showed inverse correlation with NT-proBNP and MLHF scores.

Findings:

• Exercise rehabilitation for 12 weeks led to a significant increase in plasma miR-126 levels in HFpEF patients.
• Following rehabilitation, patients showed marked improvements in cardiac function, peak oxygen consumption (peak VO2), and quality of life.
• miR-126 levels positively correlated with peak VO2 and METs, and inversely with MLHF and NT-proBNP.

Implications:

• Plasma miR-126 may serve as a sensitive biomarker for assessing the effectiveness of exercise rehabilitation in HFpEF.
• Exercise interventions could positively modulate miR-126, contributing to improved clinical outcomes in HFpEF.
• Further research into miR-126's therapeutic potential in HFpEF is warranted.