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Astrocyte Networks and Intercellular Calcium Propagation

  • Jules Lallouette
  • Maurizio De PittàEmail author
  • Hugues Berry
Chapter
Part of the Springer Series in Computational Neuroscience book series (NEUROSCI)

Abstract

Astrocytes organize in complex networks through connections by gap junction channels that are regulated by extra- and intracellular signals. Calcium signals generated in individual cells can propagate across these networks in the form of intercellular calcium waves, mediated by diffusion of second messengers molecules such as inositol 1,4,5-trisphosphate. The mechanisms underpinning the large variety of spatiotemporal patterns of propagation of astrocytic calcium waves, however, remains a matter of investigation. In the last decade, awareness has grown on the morphological diversity of astrocytes as well as their connections in networks, which seem dependent on the brain area, developmental stage, and the ultrastructure of the associated neuropile. It is speculated that this diversity underpins an equal functional variety, but the current experimental techniques are limited in supporting this hypothesis because they do not allow to resolve the exact connectivity of astrocyte networks in the brain. With this aim, we present a general framework to model intercellular calcium wave propagation in astrocyte networks and use it to specifically investigate how different network topologies could influence shape, frequency, and propagation of these waves.

Keywords

Three-dimensional astrocyte networks Intercellular calcium waves Spatiotemporal IP\(_3\) dynamics Shell analysis 

Notes

Acknowledgements

MDP acknowledges the support of Pôle emploi Rhône-Alpes, the “Alain Bensoussan” Postdoctoral Fellowship Program by the European Research Council in Informatics and Mathematics (ERCIM), and the Junior Leader Postdoctoral Fellowship Program by “la Caixa” Banking Foundation (LCF/BQ/LI18/11630006). MDP’s research at BCAM is also made possible thanks to the support of the Basque Government by the BERC 2018–2021 program, as well as by the Spanish Ministry of Science, Innovation and Universities through the BCAM Severo Ochoa accreditation SEV-2017-0718.

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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Jules Lallouette
    • 1
  • Maurizio De Pittà
    • 1
    • 2
    Email author
  • Hugues Berry
    • 1
  1. 1.EPI BEAGLEINRIA Rhône-AlpesVilleurbanneFrance
  2. 2.Basque Center for Applied MathematicsBilbaoSpain

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