Key result
Canine atrial fibroblasts exhibited enhanced proliferative and fibrotic reactivity compared to ventricular fibroblasts, driven largely by differential PDGF signaling.
Population
Canine atrial and ventricular fibroblasts (from normal and congestive heart failure models)
Comparison
Exposure to growth factors and PDGF receptor… vs Ventricular fibroblasts
Design
Preclinical
Authors
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May guide atrium-specific antifibrotic strategies; leaves open human validation of PDGF signaling in AF.
Atrial fibroblasts exhibit enhanced reactivity and distinct gene expression profiles compared to ventricular fibroblasts, particularly involving PDGF signaling, which may explain greater atrial fibrotic responses and serve as a target for preventing arrhythmogenic remodeling.
Burstein et al. (2008) studied Congestive heart failure. Atrial fibroblasts vs. Ventricular fibroblasts was evaluated on Morphological, secretory, and proliferative response indexes. Canine atrial fibroblasts exhibited enhanced proliferative and fibrotic reactivity compared to ventricular fibroblasts, driven largely by differential PDGF signaling.
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