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  • Title: Wave failure at strong coupling in intracellular Ca^{2+} signaling system with clustered channels.
    Author: Li X, Wu Y, Gao X, Cai M, Shuai J.
    Journal: Phys Rev E; 2018 Jan; 97(1-1):012406. PubMed ID: 29448381.
    Abstract:
    As an important intracellular signal, Ca^{2+} ions control diverse cellular functions. In this paper, we discuss the Ca^{2+} signaling with a two-dimensional model in which the inositol 1,4,5-trisphosphate (IP_{3}) receptor channels are distributed in clusters on the endoplasmic reticulum membrane. The wave failure at large Ca^{2+} diffusion coupling is discussed in detail in the model. We show that with varying model parameters the wave failure is a robust behavior with either deterministic or stochastic channel dynamics. We suggest that the wave failure should be a general behavior in inhomogeneous diffusing systems with clustered excitable regions and may occur in biological Ca^{2+} signaling systems.
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