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Updated: Apr 25, 2026

Author Spotlight: Developing a Translational Model for Atrial Fibrillation Research Across Species
Published on: November 21, 2023
Circulating Endothelial Cells and Platelet Microparticles in Mitral Valve Disease With and Without Atrial
Naglaa K Idriss1, Andrew D Blann2, Douaa M Sayed3
1Department of Medical Biochemistry, Faculty of Medicine, Assiut University, Assiut, Egypt.
Abstract:
Hypercoagulability in mitral valve disease (MVD), a cause of atrial fibrillation (AF) and stroke, is potentially due to endothelial damage/dysfunction (marked by circulating endothelial cells [CECs]), platelet activation (soluble P-selectin [sPsel], platelet microparticles [PMPs], and soluble CD40 [sCD40]), and oxidized low-density lipoprotein (oxLDL) cholesterol. We measured these variables in 24 patients with MVD as well as in 21 with MVD + AF and compared them with 20 healthy controls (HCs). The CECs and PMPs were measured by flow cytometry; sPsel, oxLDL, and CD40 by enzyme-linked immunosorbent assay. Compared with HCs, sPsel and PMPs were equally higher in MVD and MVD + AF; sCD40 and oxLDL were higher in MVD + AF than in HCs and MVD; and CECs were higher in MVD than in the HCs, with further increases in MVD + AF (all P < .001). We conclude that excess platelet activation is present in MVD regardless of AF, and that increased endothelial damage in MVD is greater when compounded by AF.
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