Skip to main content

TASK-3 Two-Pore Potassium Channels drive neuronal excitability of the circadian clock and entrainment to challenging light environments

Lall, Gurprit S., Steponenaite, Aiste (2020) TASK-3 Two-Pore Potassium Channels drive neuronal excitability of the circadian clock and entrainment to challenging light environments. Biorxiv, . pp. 1-17. (doi:10.1101/2020.07.27.222885) (KAR id:82986)

PDF Pre-print
Language: English
Download (767kB) Preview
Official URL
https://doi.org/10.1101/2020.07.27.222885

Abstract

The suprachiasmatic nucleus (SCN), the mammalian circadian clock, is a heterogenous structure made of several neuron types that generate a circadian electrical activity profile. However, it is unclear how such regulation in endogenous neuronal excitability is maintained. Background two- pore domain potassium channels (K2P), such as TASK-3, play an important role in inhibiting neuronal activity. Here, we utilize a TASK-3 KO mouse model to unravel the role played by this channel in SCN circadian neuronal regulation and behavioral photoentrainment. Our results reveal that TASK-3 is needed to adapt to challenging lighting conditions, such as those experienced through seasonal changes and jet lag. From our investigations this appears to be very distinct from pathways that drive acute, ‘one-off’ adjustments in clock phase, in response to single pulses of light. These findings provide crucial information on the intricate pathways linking clock output to behavioral adaptation to light-dark cycles.

Item Type: Article
DOI/Identification number: 10.1101/2020.07.27.222885
Subjects: Q Science
R Medicine
Divisions: Faculties > Sciences > Medway School of Pharmacy
Depositing User: Gurprit Lall
Date Deposited: 17 Sep 2020 22:02 UTC
Last Modified: 30 Sep 2020 09:24 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/82986 (The current URI for this page, for reference purposes)
Lall, Gurprit S.: https://orcid.org/0000-0003-3725-4795
Steponenaite, Aiste: https://orcid.org/0000-0002-1988-3419
  • Depositors only (login required):