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- W2936272451 abstract "Background Heart failure (HF) is invariably accompanied by development of cardiac fibrosis, a form of scarring that increases muscular tissue rigidity and decreases cardiac contractility. Cardiac fibrosis arises from a pathological attempt to repair tissue damaged during maladaptive remodeling. Treatment options to block or reverse fibrosis have proven elusive. Neprilysin is an endopeptidase that degrades vasoactive peptides, including atrial natriuretic peptide. Thus, neprilysin inhibition reduces hypertension, ultimately limiting maladaptive cardiac remodeling. LCZ696, which consists of an angiotensin receptor blocker (valsartan [VAL]) and a neprilysin inhibitor (sacubitril [SAC]), was shown to be well tolerated and significantly reduced the risk of death and hospitalization in HF patients with reduced ejection fraction. We hypothesized that SAC/VAL directly inhibits fibroblast activation and development of pathological fibrosis. Methods and Results We used a mouse model of left ventricle pressure overload coupled to in vitro studies in primary mouse and human cardiac fibroblasts (CFs) to study the impact of SAC/VAL on CF activation and cardiac fibrosis. SAC/VAL significantly ameliorated pressure overload–induced cardiac fibrosis by blocking CF activation and proliferation, leading to functional improvement. Mechanistically, the beneficial impact of SAC/VAL at least partially stemmed from restoration of PKG (protein kinase G) signaling in HF patient-derived CF, which inhibited Rho activation associated with myofibroblast transition. Conclusions This study reveals that SAC/VAL acts directly on CF to prevent maladaptive cardiac fibrosis and dysfunction during pressure overload–induced hypertrophy and suggests that SAC/VAL should be evaluated as a direct antifibrotic therapeutic for conditions such as HF with preserved ejection fraction." @default.
- W2936272451 created "2019-04-25" @default.
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- W2936272451 date "2019-04-01" @default.
- W2936272451 modified "2023-10-16" @default.
- W2936272451 title "Sacubitril/Valsartan Decreases Cardiac Fibrosis in Left Ventricle Pressure Overload by Restoring PKG Signaling in Cardiac Fibroblasts" @default.
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- W2936272451 doi "https://doi.org/10.1161/circheartfailure.118.005565" @default.
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