The switching role of β-adrenergic receptor signalling in cell survival or death decision of cardiomyocytes.

ABSTRACT: How cell fate (survival or death) is determined and whether such determination depends on the strength of stimulation has remained unclear. In this study, we discover that the cell fate of cardiomyocytes switches from survival to death with the increase of β-adrenergic receptor (β-AR) stimulation. Mathematical simulations combined with biochemical experimentation of β-AR signalling pathways show that the gradual increment of isoproterenol (a non-selective β1/β2-AR agonist) induces the switching response of Bcl-2 expression from the initial increase followed by a decrease below its basal level. The ERK1/2 and ICER-mediated feed-forward loop is the hidden design principle underlying such cell fate switching characteristics. Moreover, we find that β1-blocker treatment increases the survival e

SUBMITTER: Shin SY 

PROVIDER: S-EPMC4284638 | biostudies-literature | 2014 Dec

REPOSITORIES: biostudies-literature