Cooperative maintenance of cellular identity in systems with intercellular communication defects

Abstract

The cooperative dynamics of cellular populations emerging from the underlying interactions determines cellular functions, and thereby their identity in tissues. Global deviations from this dynamics on the other hand reflects pathological conditions. However, how these conditions are stabilized from dis-regulation on the level of the single entities is still unclear. Here we tackle this question using generic Hodgkin-Huxley type of models that describe physiological bursting dynamics of pancreatic beta-cells, and introduce channel dis-function to mimic pathological silent dynamics. The probability for pathological behavior in beta-cell populations is ∼ 100% when all cell have these defects, despite the negligible size of the silent state basin of attraction for single cells. In stark contrast, in a more realistic scenario for a heterogeneous population, stabilization of the pathological state depends on the size of the sub-population which acquired the defects. However, the probability to exhibit stable pathological dynamics in this case is less than ∼ 10%. These results therefore suggest that the arXiv:1909.02944v2 [q-bio.CB] 23 Sep 2019 physiological bursting dynamics of a population of beta-cells is cooperatively regulated, even under intercellular communication defects induced by dis-functional channels of single-cells.

Excitation of a Group of Two Hindmarsh – Rose Neurons with a Neuron-Generated Signal

“…Multistability also plays an important role in such biophysical processes. Thus, some authors use modified Hodgkin -Huxley type models to incorporate certain biological mechanisms into the models [8][9][10]. In this work, we use the Hindmarsh -Rose model, also derived within the Hodgkin -Huxley formalism, to simulate the neuronal activity [11].…”