Differential Behaviors of Atrial Versus Ventricular Fibroblasts A Potential Role for Platelet-Derived Growth Factor in Atrial-Ventricular Remodeling Differences
TLDR
Atrial fibroblasts behave differently than ventricular fibro Blasts over a range of in vitro and in vivo paradigms, with atrial Fibroblast showing enhanced reactivity that may explain greater atrial fibrotic responses.Abstract:
Background— In various heart disease paradigms, atria show stronger fibrotic responses than ventricles. The possibility that atrial and ventricular fibroblasts respond differentially to pathological stimuli has not been examined. Methods and Results— We compared various morphological, secretory, and proliferative response indexes of canine atrial versus ventricular fibroblasts. Cultured atrial fibroblasts showed faster cell surface area increases, distinct morphology at confluence, and greater α-smooth muscle actin expression than ventricular fibroblasts. Atrial fibroblast proliferation ([3H]thymidine incorporation) responses were consistently greater for a range of growth factors, including fetal bovine serum, platelet-derived growth factor (PDGF), basic fibroblast growth factor, angiotensin II, endothelin-1, and transforming growth factor-β1. Normal atrial tissue showed larger myofibroblast density compared with ventricular tissue, and the difference was exaggerated by congestive heart failure. Congesti...read more
Citations
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Pathophysiological Mechanisms of Atrial Fibrillation: A Translational Appraisal
TL;DR: A translational overview on the biological basis of atrial remodeling and the proarrhythmic mechanisms involved in the fibrillation process is given.
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Atrial remodeling and atrial fibrillation: mechanisms and implications.
TL;DR: The types of atrial remodeling, their underlying pathophysiology, the molecular basis of their occurrence, and finally, their potential therapeutic significance are reviewed.
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Cells of the adult human heart.
Monika Litviňuková,Monika Litviňuková,Carlos Talavera-López,Carlos Talavera-López,Henrike Maatz,Daniel Reichart,Daniel Reichart,Catherine L. Worth,Eric L. Lindberg,Masatoshi Kanda,Masatoshi Kanda,Krzysztof Polanski,Matthias Heinig,Michael Lee,Emily R. Nadelmann,Kenny Roberts,Liz Tuck,Eirini S. Fasouli,Daniel M. DeLaughter,Barbara McDonough,Barbara McDonough,Barbara McDonough,Hiroko Wakimoto,Joshua M. Gorham,Sara Samari,Krishnaa T. Mahbubani,Kourosh Saeb-Parsy,Giannino Patone,Joseph J. Boyle,Hongbo Zhang,Hongbo Zhang,Hao Zhang,Anissa Viveiros,Gavin Y. Oudit,Omer Ali Bayraktar,Jonathan G. Seidman,Christine E. Seidman,Christine E. Seidman,Christine E. Seidman,Michela Noseda,Michela Noseda,Norbert Hubner,Sarah A. Teichmann,Sarah A. Teichmann +43 more
TL;DR: The state-of-the-art analyses of large-scale single-cell and single-nucleus transcriptomes are used to construct a cellular atlas of the human heart that will aid further research into cardiac physiology and disease and provides a valuable reference for future studies.
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Inflammation and the pathogenesis of atrial fibrillation
TL;DR: Understanding the complex pathophysiological processes and dynamic changes of AF-associated inflammation might help to identify specific anti-inflammatory strategies for the prevention of AF.
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EHRA/HRS/APHRS/SOLAECE expert consensus on atrial cardiomyopathies: Definition, characterization, and clinical implication
Andreas Goette,Jonathan M. Kalman,Luis Aguinaga,Joseph G. Akar,José Angel Cabrera,Shih Ann Chen,Sumeet S. Chugh,Domenico Corradi,Andre d'Avila,Dobromir Dobrev,Guilherme Fenelon,Mario D. Gonzalez,Stéphane N. Hatem,Robert H. Helm,Gerhard Hindricks,Siew Yen Ho,Brian Hoit,José Jalife,Young Hoon Kim,Gregory Y.H. Lip,Chang Sheng Ma,Gregory M. Marcus,Katherine T. Murray,Akihiko Nogami,Prashanthan Sanders,William Uribe,David R. Van Wagoner,Stanley Nattel,Stanley Nattel +28 more
TL;DR: The working group proposes the following working definition of atrial cardiomyopathy: ‘Any complex of structural, architectural, contractile or electrophysiological changes affecting the atria with the potential to produce clinically-relevant manifestations’ (Table 1).
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