Related Experiment Video
Updated: Apr 24, 2026
Evaluation of Synapse Density in Hippocampal Rodent Brain Slices
Published on: October 6, 2017
Emerging role of WNK1 in pathologic central nervous system signaling
Evan M Krueger1, Gurwattan S Miranpuri2, Daniel K Resnick2
1A. T. Still University - Kirksville College of Medicine, Kirksville, MO, USA.
Abstract:
WNK1 (with no lysine (K)) is a widely expressed serine/threonine protein kinase. The role of this kinase was first described in the kidney where it dynamically controls ion channels that regulate changes in cell volume. WNK1, through intermediates oxidative stress-responsive kinase-1 (OSR1) and STE20/SPS1-related proline/alanine-rich kinase (SPAK), phosphorylates the inwardly directed Na(+)-K+-Cl(-)--cotransporter 1 (NKCC1) and the outwardly directed K(+)-Cl(-)-cotransporter 2 (KCC2), activating and deactivating these channels, respectively. WNK1, NKCC1 and KCC2 are also expressed in the central nervous system (CNS). Growing evidence implicates WNK1 playing a critical role in pathologic nervous system signaling where changes in intracellular ion concentration in response to γ-aminobutyric-acid (GABA) can activate otherwise silent pathways. This review will focus on current research about WNK1, its downstream effectors and role in GABA signaling. Future perspectives include investigating WNK1 expression in the CNS after spinal cord injury (SCI), where altered neuronal signaling could underlie pathological states such as neuropathic pain (NP).
Insights
WNK1 kinase regulates ion channels in the brain and kidney. This review explores its role in central nervous system (CNS) GABA signaling and potential links to neuropathic pain after spinal cord injury (SCI).
Area of Science:
- Neuroscience
- Molecular Biology
- Physiology
Background:
- WNK1 (with no lysine (K)) is a serine/threonine protein kinase widely expressed in the kidney and central nervous system (CNS).
- It regulates ion transport via downstream kinases OSR1 and SPAK, affecting NKCC1 and KCC2 cotransporters.
- Dysregulation of WNK1 signaling is implicated in pathological CNS conditions.
Purpose of the Study:
- To review current research on WNK1, its downstream effectors, and its role in GABA signaling within the CNS.
- To highlight the potential involvement of WNK1 in neuropathic pain (NP) following spinal cord injury (SCI).
Main Methods:
- Literature review of existing research on WNK1 signaling pathways.
- Analysis of WNK1's role in ion channel regulation and neuronal signaling.
- Discussion of potential future research directions.
Main Results:
- WNK1 dynamically controls ion channels, impacting cell volume regulation in the kidney.
- In the CNS, WNK1, NKCC1, and KCC2 are involved in signaling pathways activated by GABA.
- Altered WNK1 expression post-SCI may contribute to neuropathic pain.
Conclusions:
- WNK1 plays a critical role in CNS signaling, particularly in response to GABA.
- Further investigation into WNK1's role in SCI and neuropathic pain is warranted.
Related Concept Videos
02:54Canonical Wnt Signaling Pathway
02:54Canonical Wnt Signaling Pathway
01:41Non-Canonical Wnt Signaling Pathways
01:41Non-Canonical Wnt Signaling Pathways
03:14Notch Signaling Pathway
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
02:26NF-κB-dependent Signaling Pathway
NF-κB-dependent Signaling Mechanism
The...