Hydrogen sulfide regulates hippocampal neuron excitability via S-sulfhydration of Kv2.1

Dallas, M. L. ORCID: https://orcid.org/0000-0002-5190-0522, Al-Owais, M. M., Hettiarachchi, N. T., Vandiver, M. S., Jarosz-Griffiths, H. H., Scragg, J. L., Boyle, J. P., Dallas, D. and Peers, C. (2021) Hydrogen sulfide regulates hippocampal neuron excitability via S-sulfhydration of Kv2.1. Scientific Reports, 11. 8194. ISSN 2045-2322 doi: 10.1038/s41598-021-87646-5

Abstract/Summary

Hydrogen sulfide (H2S) is gaining interest as a mammalian signalling molecule with wide ranging effects. S-sulfhydration is one mechanism that is emerging as a key post translational modification through which H2S acts. Ion channels and neuronal receptors are key target proteins for S-sulfhydration and this can influence a range of neuronal functions. Voltage-gated K+ channels, including Kv2.1, are fundamental components of neuronal excitability. Here, we show that both recombinant and native rat Kv2.1 channels are inhibited by the H2S donors, NaHS and GYY4137. Biochemical investigations revealed that NaHS treatment leads to S-sulfhydration of the full length wild type Kv2.1 protein which was absent (as was functional regulation by H2S) in the C73A mutant form of the channel. Functional experiments utilising primary rat hippocampal neurons indicated that NaHS augments action potential firing and thereby increases neuronal excitability. These studies highlight an important role for H2S in shaping cellular excitability through S-sulfhydration of Kv2.1 at C73 within the central nervous system.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/97442
Identification Number/DOI	10.1038/s41598-021-87646-5
Refereed	Yes
Divisions	Life Sciences > School of Chemistry, Food and Pharmacy > School of Pharmacy > Division of Pharmacology
Publisher	Nature Publishing Group
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