Race-based and sex-based differences in bioactive lipid mediators after myocardial infarction

Area of Science:

• Cardiovascular Research
• Lipidomics
• Immunology

Background:

• Specialized pro-resolving mediators (SPMs) are vital for cardiac repair after myocardial infarction (MI).
• Precise quantitation of SPMs during acute MI, considering race and sex, is poorly understood.
• Disparities in cardiovascular outcomes exist between Black and White patients, necessitating research into underlying mechanisms.

Purpose of the Study:

• To assess race- and sex-specific differences in bioactive lipids and SPMs in patients experiencing acute MI.
• To elucidate potential mechanisms contributing to sex- and race-based disparities in cardiovascular events.
• To identify novel therapeutic targets for personalized cardiovascular medicine.

Main Methods:

• Plasma samples were collected from Black and White patients within 24-48 hours of MI diagnosis.
• Levels of polyunsaturated fatty acids (arachidonic acid, docosahexaenoic acid, eicosapentaenoic acid) and 40 SPMs were quantified using liquid chromatography-mass spectrometry.
• Comparative analyses were performed based on race and sex.

Main Results:

• White patients had higher levels of arachidonic acid and docosahexaenoic acid compared to Black patients.
• Eicosapentaenoic acid was higher in White males than in White females and Black patients.
• Resolvin E1 was lower in Black patients, while protectin D1 was lower in White males.

Conclusions:

• Comparative analyses of fatty acids and SPM signatures highlight heterogeneity in MI pathology.
• Findings elucidate potential mechanisms underlying sex- and race-based differences in post-MI inflammation and resolution.
• This research supports the development of predictive, personalized treatments to reduce cardiovascular disparities.