Title | TASK-3, two-pore potassium channels, contribute to circadian rhythms in the electrical properties of the suprachiasmatic nucleus and play a role in driving stable behavioural photic entrainment. |
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Type | Journal article |
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Authors | Steponenaite, A., Lalic, T., Atkinson, L., Tanday, N., Brown, L., Mathie, A., Cader, Z.M. and Lall, G.S. |
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Abstract | Stable and entrainable physiological circadian rhythms are crucial for overall health and well-being. The suprachiasmatic nucleus (SCN), the primary circadian pacemaker in mammals, consists of diverse neuron types that collectively generate a circadian profile of electrical activity. However, the mechanisms underlying the regulation of endogenous neuronal excitability in the SCN remain unclear. Two-pore domain potassium channels (K2P), including TASK-3, are known to play a significant role in maintaining SCN diurnal homeostasis by inhibiting neuronal activity at night. In this study, we investigated the role of TASK-3 in SCN circadian neuronal regulation and behavioural photoentrainment using a TASK-3 global knockout mouse model. Our findings demonstrate the importance of TASK-3 in maintaining SCN hyperpolarization during the night and establishing SCN sensitivity to glutamate. Specifically, we observed that TASK-3 knockout mice lacked diurnal variation in resting membrane potential and exhibited altered glutamate sensitivity both in vivo and in vitro. Interestingly, despite these changes, the mice lacking TASK-3 were still able to maintain relatively normal circadian behaviour. |
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Journal | Chronobiology International |
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Journal citation | 41 (6), pp. 802-816 |
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ISSN | 0742-0528 |
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| 1525-6073 |
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Year | 2024 |
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Publisher | Taylor & Francis |
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Publisher's version | License CC BY-NC-ND 4.0 File Access Level Open (open metadata and files) |
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Digital Object Identifier (DOI) | https://doi.org/10.1080/07420528.2024.2351515 |
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PubMed ID | 38757583 |
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Web address (URL) | https://doi.org/10.1080/07420528.2024.2351515 |
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Publication dates |
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Published online | 17 May 2024 |
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