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Predictive model identifies key network regulators of cardiomyocyte mechano-signaling. | LitMetric

Predictive model identifies key network regulators of cardiomyocyte mechano-signaling.

PLoS Comput Biol

Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, United States of America.

Published: November 2017

AI Article Synopsis

Article Abstract

Mechanical strain is a potent stimulus for growth and remodeling in cells. Although many pathways have been implicated in stretch-induced remodeling, the control structures by which signals from distinct mechano-sensors are integrated to modulate hypertrophy and gene expression in cardiomyocytes remain unclear. Here, we constructed and validated a predictive computational model of the cardiac mechano-signaling network in order to elucidate the mechanisms underlying signal integration. The model identifies calcium, actin, Ras, Raf1, PI3K, and JAK as key regulators of cardiac mechano-signaling and characterizes crosstalk logic imparting differential control of transcription by AT1R, integrins, and calcium channels. We find that while these regulators maintain mostly independent control over distinct groups of transcription factors, synergy between multiple pathways is necessary to activate all the transcription factors necessary for gene transcription and hypertrophy. We also identify a PKG-dependent mechanism by which valsartan/sacubitril, a combination drug recently approved for treating heart failure, inhibits stretch-induced hypertrophy, and predict further efficacious pairs of drug targets in the network through a network-wide combinatorial search.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5703578PMC
http://dx.doi.org/10.1371/journal.pcbi.1005854DOI Listing

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