Article (Scientific journals)
Cell types, network homeostasis, and pathological compensation from a biologically plausible ion channel expression model.
O'Leary, Timothy; Williams, Alex H; Franci, Alessio et al.
2014In Neuron, 82 (4), p. 809 - 821
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Keywords :
Ion Channels; Action Potentials; Animals; Computer Simulation; Homeostasis/physiology; Humans; Ion Channels/metabolism; Nerve Net/physiology; Neurons/classification; Neurons/pathology; Neurons/physiology; Models, Biological; Neuroscience (all); General Neuroscience
Abstract :
[en] How do neurons develop, control, and maintain their electrical signaling properties in spite of ongoing protein turnover and perturbations to activity? From generic assumptions about the molecular biology underlying channel expression, we derive a simple model and show how it encodes an "activity set point" in single neurons. The model generates diverse self-regulating cell types and relates correlations in conductance expression observed in vivo to underlying channel expression rates. Synaptic as well as intrinsic conductances can be regulated to make a self-assembling central pattern generator network; thus, network-level homeostasis can emerge from cell-autonomous regulation rules. Finally, we demonstrate that the outcome of homeostatic regulation depends on the complement of ion channels expressed in cells: in some cases, loss of specific ion channels can be compensated; in others, the homeostatic mechanism itself causes pathological loss of function.
Disciplines :
Neurology
Author, co-author :
O'Leary, Timothy;  Volen Center and Biology Department, Brandeis University, Waltham, MA 02454, USA. Electronic address: toleary@brandeis.edu
Williams, Alex H;  Volen Center and Biology Department, Brandeis University, Waltham, MA 02454, USA
Franci, Alessio  ;  Université de Liège - ULiège > Département d'électricité, électronique et informatique (Institut Montefiore) > Systèmes et modélisation
Marder, Eve;  Volen Center and Biology Department, Brandeis University, Waltham, MA 02454, USA. Electronic address: marder@brandeis.edu
Language :
English
Title :
Cell types, network homeostasis, and pathological compensation from a biologically plausible ion channel expression model.
Publication date :
21 May 2014
Journal title :
Neuron
ISSN :
0896-6273
eISSN :
1097-4199
Publisher :
Cell Press, United States
Volume :
82
Issue :
4
Pages :
809 - 821
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
The authors thank Michael Wright and Paul Miller for comments. Funding was provided by NIH 1P01NS079419 and the Charles A. King Trust.
Available on ORBi :
since 26 May 2023

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