The Oscillation Amplitude, Not the Frequency of Cytosolic Calcium, Regulates Apoptosis Induction.

ABSTRACT: Although a rising concentration of cytosolic Ca²⁺ has long been recognized as an essential signal for apoptosis, the dynamical mechanisms by which Ca²⁺ regulates apoptosis are not clear yet. To address this, we constructed a computational model that integrates known biochemical reactions and can reproduce the dynamical behaviors of Ca²⁺-induced apoptosis as observed in experiments. Model analysis shows that oscillating Ca²⁺ signals first convert into gradual signals and eventually transform into a switch-like apoptotic response. Via the two processes, the apoptotic signaling pathway filters the frequency of Ca²⁺ oscillations effectively but instead responds acutely to their amplitude. Collectively, our results suggest that Ca²⁺

SUBMITTER: Qi H 

PROVIDER: S-EPMC7644924 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature