ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2026
Inactivation of AXL in Cardiac Fibroblasts Alleviates Right Ventricular Remodeling in Pulmonary Hypertension.
Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Advances in the pathogenesis and clinical management of pulmonary hypertension.Medical review (2021) · 2026Review
- Inactivation of AXL in Cardiac Fibroblasts Alleviates Right Ventricular Remodeling in Pulmonary Hypertension.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
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Authors and funding
18 authors.
Funding
Abstract
Right ventricular (RV) adaptation critically determines survival in pulmonary hypertension (PH). Since cardiac fibroblasts (FBs) are crucial mediators of cardiac fibrosis, we aim to uncover the mechanism underlying their activation during RV remodeling. Using single-nucleus RNA sequencing (snRNA-seq) across three rodent PH models-hypobaric hypoxia and Sugen 5416/hypoxia in mice, and monocrotaline in rats-we identified elevated Axl expression in RV FBs under PH. AXL upregulation was consistently observed in RV FBs from both human PH patients and animal models. Cardiac FB-specific Axl overexpression exacerbated RV remodeling in both PH and pulmonary artery banding (PAB) models, whereas Axl knockdown in FBs alleviated this remodeling. Functionally, AXL promoted FB proliferation, migration, and extracellular matrix synthesis via the PI3K-AKT pathway, facilitating nuclear translocation of NFIC, which in turn promoted the transcription of targeted genes such as COL1A1. Inhibiting PI3K or administering R428 mitigated AXL-driven RV remodeling in PH, and R428 also ameliorated remodeling in PAB mice. In conclusion, AXL signals the PI3K-AKT pathway to license nuclear translocation of NFIC, thereby dictating the transcription of fibrotic genes in FBs and driving RV remodeling. These findings reveal novel insights into RV pathophysiology and highlight AXL as a potential therapeutic target for PH-induced RV remodeling.
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Registered trials
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