FGF14 Peptide Derivative Differentially Regulates Nav1.2 and Nav1.6 Function
Parsa Arman1, Zahra Haghighijoo1, Carmen A Lupascu2
1Department of Pharmacology & Toxicology, University of Texas Medical Branch, 301 University Blvd., Galveston, TX 77555, USA.
Life (Basel, Switzerland)
|September 27, 2025
Summary
A novel compound, ZL0177, selectively modulates voltage-gated sodium channels (Nav1.2 and Nav1.6), offering potential for targeted therapies. This study explores its isoform-specific effects on neuronal excitability and action potential discharge.
Area of Science:
- Neuroscience
- Molecular Biology
- Pharmacology
Background:
- Voltage-gated sodium channels (Nav) are crucial for neuronal electrical activity.
- Specific isoforms like Nav1.2 and Nav1.6 are implicated in central nervous system development and channelopathies.
- Modulation of Nav channels via protein-protein interactions (PPIs) presents a therapeutic avenue.
Purpose of the Study:
- To investigate the isoform specificity of the peptidomimetic ZL0177 on Nav1.2 and Nav1.6 channels.
- To determine the binding sites and physiological impact of ZL0177 on neuronal excitability.
- To explore the potential of PPI derivatives for isoform-specific Nav channel regulation.
Main Methods:
- Automated planar patch-clamp electrophysiology was employed to assess ZL0177's activity in cells expressing Nav1.2 or Nav1.6.
- AlphaFold structural modeling was used to predict compound docking and binding sites.
- Computational modeling was utilized to predict the effects of ZL0177 on action potential discharge.
Main Results:
- ZL0177 suppressed sodium currents (INa) in both Nav1.2 and Nav1.6 expressing cells.
- Functional effects on channel kinetics were isoform-specific, supported by differential compound docking.
- Computational modeling predicted divergent effects on action potential discharge for Nav1.2 and Nav1.6.
Conclusions:
- ZL0177 exhibits isoform-specific modulation of Nav1.2 and Nav1.6 channels.
- PPI derivatives show promise for developing therapeutics targeting specific Nav channel isoforms.
- This research opens avenues for novel treatments for channelopathies.
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