Evidence map›Paper›PMID 38784679›Full record

ArticleFrontiers in computational neuroscience2024

Computational modeling to study the impact of changes in Nav1.8 sodium channel on neuropathic pain.

Peter Kan, Yong Fang Zhu, Junling Ma, Gurmit Singh

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Article in Frontiers in computational neuroscience, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

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0cells of the map it votes in
4citing papers in PubMed
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3 · Its place in the literature

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4 citing papers in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

4 authors.

Peter KanDepartment of Health Sciences, McMaster University, Hamilton, ON, Canada.
Yong Fang ZhuDepartment of Health Sciences, Redeemer University, Hamilton, ON, Canada.
Junling MaDepartment of Mathematics and Statistics, University of Victoria, Victoria, BC, Canada.
Gurmit SinghDepartment of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Objective: Nav1.8 expression is restricted to sensory neurons; it was hypothesized that aberrant expression and function of this channel at the site of injury contributed to pathological pain. However, the specific contributions of Nav1.8 to neuropathic pain are not as clear as its role in inflammatory pain. The aim of this study is to understand how Nav1.8 present in peripheral sensory neurons regulate neuronal excitability and induce various electrophysiological features on neuropathic pain. Methods: To study the effect of changes in sodium channel Nav1.8 kinetics, Hodgkin-Huxley type conductance-based models of spiking neurons were constructed using the NEURON v8.2 simulation software. We constructed a single-compartment model of neuronal soma that contained Nav1.8 channels with the ionic mechanisms adapted from some existing small DRG neuron models. We then validated and compared the model with our experimental data from Results: We show that Nav1.8 is an important parameter for the generation and maintenance of abnormal neuronal electrogenesis and hyperexcitability. The typical increased excitability seen is dominated by a left shift in the steady state of activation of this channel and is further modulated by this channel's maximum conductance and steady state of inactivation. Therefore, modified action potential shape, decreased threshold, and increased repetitive firing of sensory neurons in our neuropathic animal models may be orchestrated by these modulations on Nav1.8. Conclusion: Computational modeling is a novel strategy to understand the generation of chronic pain. In this study, we highlight that changes to the channel functions of Nav1.8 within the small DRG neuron may contribute to neuropathic pain.

Indexed as

computational modelingDRGelectrophysiologyNav1.8neuropathy

Identifiers

PMID38784679
PMCPMC11111952

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