ReviewInternational journal of molecular sciences2026
Chloride Homeostasis Failure in Human Disease: KCC2/NKCC1 Microdomain Dysfunction as a Driver of Cortical Network Collapse.
Review in International journal of molecular sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
6 authors.
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Abstract
The regulation of chloride levels is a crucial part of controlling inhibitory signals, but does not occur uniformly throughout the body. Recent data suggest that chloride is regulated within localized "microdomains" which are defined by the interaction of KCC2 and NKCC1, structural restraints on cells due to their internal structure, the metabolic condition of the cell, and the external environment modified by astrocytes. The gradients of chloride concentrations within these compartment-specific microdomains define the local chloride reversal potential, and thereby determine the directionality (i.e., whether excitatory or inhibitory), magnitude, and timing of GABAergic inhibition. The disruption of this organized chloride gradient within microdomains impairs the stability of inhibitory activity at multiple levels of integration, including dendritic input, spike timing, interneuron synchronization, and network oscillation. Disturbances in inhibitory stability have been found in a variety of diseases, including epilepsy, neonatal seizure, neuropathic pain, and schizophrenia-spectrum disorders. This supports the hypothesis that disturbances in chloride homeostasis lead to a loss of stability in cortical circuits. This review will provide a synthesis of the molecular, spatial, and circuit level principles involved in the regulation of chloride and discuss how failures of these mechanisms produce clinically relevant disturbances in inhibitory signal processing. In addition, we will be discussing new therapeutic strategies for the restoration of chloride homeostasis, including KCC2 repair, selective modulation of NKCC1, targeting astrocytes, and microenvironmental engineering. Overall, the studies reviewed here provide a unified model for understanding the pathophysiology of inhibitory dysfunction, and demonstrate that the regulation of chloride microdomains provides a novel and promising area of research for translational intervention.
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