Front Pharmacol. 2017 Apr 05;8:187. doi: 10.3389/fphar.2017.00187. eCollection 2017.
Notch Signaling in Ischemic Damage and Fibrosis: Evidence and Clues from the Heart.
Frontiers in pharmacology
Silvia Nistri, Chiara Sassoli, Daniele Bani
Affiliations
Affiliations
- Research Unit of Histology and Embryology, Department of Experimental and Clinical Medicine, University of FlorenceFlorence, Italy.
- Department of Experimental and Clinical Medicine, Section of Anatomy and Histology, University of FlorenceFlorence, Italy.
PMID: 28424623
PMCID: PMC5381357 DOI: 10.3389/fphar.2017.00187
Abstract
Notch signaling is a major intercellular coordination mechanism highly conserved throughout evolution. In vertebrates, Notch signaling is physiologically involved in embryo development, including mesenchymal cell commitment, formation of heart tissues and angiogenesis. In post-natal life, Notch signaling is maintained as a key mechanism of cell-cell communication and its dysregulations have been found in pathological conditions such as ischemic and fibrotic diseases. In the heart, Notch takes part in the protective response to ischemia, being involved in pre- and post-conditioning, reduction of reperfusion-induced oxidative stress and myocardial damage, and cardiomyogenesis. Conceivably, the cardioprotective effects of Notch may depend on neo-angiogenesis, thus blunting lethal myocardial ischemia, as well as on direct stimulation of cardiac cells to increase their resistance to injury. Another post-developmental adaptation of Notch signaling is fibrosis: being involved in the orientation of mesenchymal cell fate, Notch can modulate the differentiation of pro-fibrotic myofibroblasts, e.g., by reducing the effects of the profibrotic cytokine TGF-β. In conclusion, Notch can regulate the interactions between heart muscle and stromal cells and switch cardiac repair from a pro-fibrotic default pathway to a pro-cardiogenic one. These features make Notch signaling a suitable target for new cardiotropic therapies.
Keywords: Notch; cardiac preconditioning; fibrosis; heart; ischemia-reperfusion
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