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- W2009804037 abstract "Background: Chronic atrial fibrillation (AF) is characterized by a remodeling process with prominent atrial fibrosis. Fibrocytes, a bone marrow-derived population of fibroblast-like cells, have been placed at the center of a number of fibrosing conditions. The purpose of this study was to evaluate the contribution of fibrocytes to atrial fibrosis in patients with chronic AF and the possible mechanisms. Methods and Results: We enrolled 22 consecutive valvular heart disease patients with chronic AF (>6 months: CAF group) and 15 valvular heart disease patients in sinus rhythm served as controls (SR group). Left atrial tissue samples were obtained during cardiac surgery. The infiltration of fibrocytes into the atrial interstitium was observed by confocal microscopy. The number of atrial fibrocytes was approximately three-fold higher in the CAF group compared with the SR controls, and positively correlated with both the atrial collagen volume fraction (r=0.713; P=0.0002) and the left atrial volume index (r=0.631; P=0.002). In the peripheral blood samples collected before the operation, approximately 2.5-fold higher percentage of circulating fibrocytes was identified in the CAF group. These fibrocytes showed a stronger proliferative capacity (≈2.5-fold) and higher level expression of collagen I and α-SMA (≈2-fold and 4-fold, respectively) compared with the SR controls. Conclusions: The results suggested that fibrocytes may be involved in atrial fibrosis in chronic AF through enhanced profibrotic characteristics. (Circ J 2014; 78: 338–344)" @default.
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- W2009804037 date "2014-01-01" @default.
- W2009804037 modified "2023-10-14" @default.
- W2009804037 title "Possible Involvement of Fibrocytes in Atrial Fibrosis in Patients With Chronic Atrial Fibrillation" @default.
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- W2009804037 doi "https://doi.org/10.1253/circj.cj-13-0776" @default.
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