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Persistent Adaptation through Dual-Timescale Regulation of Ion Channel Properties.

Yugarshi Mondal1, Ronald L Calabrese2, Eve Marder1

  • 1Volen Center and Biology Department, Brandeis University, Waltham, MA 02454.

Biorxiv : the Preprint Server for Biology
|November 24, 2025
PubMed
Summary
This summary is machine-generated.

Neurons adapt to environmental changes through persistent mechanisms. Slow changes in channel density and rapid voltage-dependence shifts tune neuronal excitability, enabling long-term adaptation to past experiences.

Keywords:
Biological SciencesNeuroscienceactivity-dependent regulationchannel activation curvescomputational modelhigh potassiumhomeostatic plasticityintrinsic excitability

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Area of Science:

  • Neuroscience
  • Computational Biology
  • Cellular Physiology

Background:

  • Neurons must maintain stable function despite environmental challenges.
  • Persistent adaptations can alter future neuronal responses, even after stimuli removal.
  • The mechanisms underlying persistent neuronal adaptation require further investigation.

Purpose of the Study:

  • To investigate the role of intrinsic currents in persistent neuronal adaptation.
  • To model how neurons adapt to perturbations and retain memory of past events.

Main Methods:

  • Development of a computational model for activity-dependent homeostasis.
  • Simulation of slow changes in ion channel density.
  • Simulation of rapid shifts in ion channel voltage-dependence.

Main Results:

  • Slow changes in channel density encode past experiences, influencing future neuronal responses.
  • Rapid shifts in voltage-dependence provide immediate compensation during perturbations.
  • Dual mechanisms of channel density and voltage-dependence tuning enable persistent adaptation.

Conclusions:

  • Intrinsic current regulation is a key mechanism for persistent neuronal adaptation.
  • Computational modeling reveals how neurons adapt to perturbations through dual processes.
  • Neuronal intrinsic excitability is dynamically tuned to maintain function over time.