Targeting the CD39/CD73 pathway: New insights into cardiac fibrosis and inflammation in female cardiac surgery patients

Le résumé fourni par la source

Women undergoing cardiac surgery suffer from worse outcomes than their male counterparts. The reasons for this disparity are multifactorial, but the loss of the protective effects of estrogen likely plays a role. Estrogen acts on the CD39/CD73 purine pathway, and loss of estrogen effects may contribute to the increased inflammation seen in post-menopausal women. We aimed to compare CD39/CD73 expression and downstream fibrosis, and inflammation in men and women undergoing cardiac surgery and then used an ovariectomy/high fat diet mouse model to approximate women who present for cardiac surgery to test therapeutics. We found decreased CD39 and CD73 in women compared to men, which was associated with increased fibrosis. Apyrase supplementation (a CD39 mimetic) improved ejection fraction and decreased E/e’. Increased CD73 function (via dipyridamole) decreased fibrosis. This study demonstrates the importance of purinergic dysfunction in cardiovascular disease in women and presents two potential therapeutics to improve cardiac health via manipulation of purine pathways. • Women undergoing cardiac surgery exhibit lower CD39/CD73 expression and increased fibrosis. • CD39/CD73 dysfunction leads to higher eATP, inflammation, and worse diastolic function. • Ovariectomy + high-fat diet mouse model mimics cardiac fibrosis seen in female patients. • Apyrase (CD39 mimetic) and dipyridamole (CD73 enhancer) improve cardiac function and fibrosis. • Findings highlight purinergic signaling as a potential therapeutic target for female heart disease.

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