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bioRxiv · 10.1101/2024.06.25.600661

KCNG4 genetic variant linked to migraine prevents expression of KCNB1

Lacroix, G.·Bhat, S.·Shafia, Z.·Blunck, R.
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Abstract

AO_SCPLOWBSTRACTC_SCPLOWMigraines are a common type of headaches affecting around 15% of the population. The signalling pathways leading to migraines have not been fully understood, but neuronal voltage-gated ion channels have been linked to this pathology, among them KCNG4. KCNG4 (Kv6.4) is a silent member of the superfamily of voltage-gated potassium (Kv) channels, which expresses in heterotetramers with members of the KCNB (Kv2) family. The genetic variant Kv6.4-L360P has previously been linked to migraine, but their mode of action remains unknown. Here, we characterized the molecular characteristics of Kv6.4-L360P when co-expressed with Kv2.1. We found that Kv6.4-L360P almost completely abolishes Kv2 currents, and we propose that this mechanism in the trigeminal system, linked to the initiation of migraine, leads to the pathology.

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Lacroix, G., Bhat, S., Shafia, Z., Blunck, R.. 2024-06-25. KCNG4 genetic variant linked to migraine prevents expression of KCNB1. https://doi.org/10.1101/2024.06.25.600661

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