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@ARTICLE{Savtchenko:140177,
author = {Savtchenko, Leonid P and Bard, Lucie and Jensen, Thomas P
and Reynolds, James P and Kraev, Igor and Medvedev, Nikolay
and Stewart, Michael G and Henneberger, Christian and
Rusakov, Dmitri A},
title = {{D}isentangling astroglial physiology with a realistic cell
model in silico.},
journal = {Nature Communications},
volume = {9},
number = {1},
issn = {2041-1723},
address = {[London]},
publisher = {Nature Publishing Group UK},
reportid = {DZNE-2020-06499},
pages = {3554},
year = {2018},
abstract = {Electrically non-excitable astroglia take up
neurotransmitters, buffer extracellular K+ and generate Ca2+
signals that release molecular regulators of neural
circuitry. The underlying machinery remains enigmatic,
mainly because the sponge-like astrocyte morphology has been
difficult to access experimentally or explore theoretically.
Here, we systematically incorporate multi-scale,
tri-dimensional astroglial architecture into a realistic
multi-compartmental cell model, which we constrain by
empirical tests and integrate into the NEURON computational
biophysical environment. This approach is implemented as a
flexible astrocyte-model builder ASTRO. As a
proof-of-concept, we explore an in silico astrocyte to
evaluate basic cell physiology features inaccessible
experimentally. Our simulations suggest that currents
generated by glutamate transporters or K+ channels have
negligible distant effects on membrane voltage and that
individual astrocytes can successfully handle extracellular
K+ hotspots. We show how intracellular Ca2+ buffers affect
Ca2+ waves and why the classical Ca2+ sparks-and-puffs
mechanism is theoretically compatible with common readouts
of astroglial Ca2+ imaging.},
keywords = {Algorithms / Amino Acid Transport System X-AG: metabolism /
Animals / Astrocytes: metabolism / Astrocytes: physiology /
Calcium: metabolism / Computer Simulation / Hippocampus:
cytology / Membrane Potentials / Models, Neurological /
Neurons: metabolism / Patch-Clamp Techniques / Potassium
Channels: metabolism / Proof of Concept Study / Rats /
Software / Amino Acid Transport System X-AG (NLM Chemicals)
/ Potassium Channels (NLM Chemicals) / Calcium (NLM
Chemicals)},
cin = {U Preclinical Researchers - Bonn},
ddc = {500},
cid = {I:(DE-2719)7000005},
pnm = {342 - Disease Mechanisms and Model Systems (POF3-342)},
pid = {G:(DE-HGF)POF3-342},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30177844},
pmc = {pmc:PMC6120909},
doi = {10.1038/s41467-018-05896-w},
url = {https://pub.dzne.de/record/140177},
}