Diurnal dynamics of the Zbtb14 protein in the ventral hippocampus are disrupted in epileptic mice

Guntan, Ilke, Ghestem, Antoine, Nazaruk, Kinga, Nizinska, Karolina, Olszewski, Maciej, Nowicka, Dorota, Bernard, Christophe and Lukasiuk, Katarzyna 2025. Diurnal dynamics of the Zbtb14 protein in the ventral hippocampus are disrupted in epileptic mice. Neuroscience 569 , pp. 12-20. 10.1016/j.neuroscience.2025.01.039

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Abstract

Our previous in silico data indicated an overrepresentation of the ZF5 motif in the promoters of genes in which circadian oscillations are altered in the ventral hippocampus in the pilocarpine model of temporal lobe epilepsy in mice. In this study, we test the hypothesis that the Zbtb14 protein oscillates in the hippocampus in a diurnal manner and that this oscillation is disrupted by epilepsy. We found that Zbtb14 immunostaining is present in the cytoplasm and cell nuclei. Western blot data indicate that the cytoplasmic and nuclear levels of Zbtb14 protein oscillate, but the phase is shifted. The densities of the Zbtb14-immunopositive cells express diurnal dynamics in the ventral hilus and CA3 but not in the dorsal hilus and CA3, or the somatosensory cortex. In the pilocarpine model of epilepsy, an increase in the level of Zbtb14 protein was found at 11 PM but not at 3 PM compared to controls. Finally, in silico analysis revealed the presence of the ZF5 motif in the promoters of 21 out of 24 genes down-regulated by epileptiform discharges in vitro, many of which are involved in neuronal plasticity. Our data suggest that Zbtb14 may be involved in the diurnal dynamic of seizure regulation or brain response to seizure rhythmicity.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Biosciences
Publisher:	Elsevier
ISSN:	0306-4522
Date of First Compliant Deposit:	9 February 2026
Date of Acceptance:	17 January 2025
Last Modified:	09 Feb 2026 09:45
URI:	https://orca.cardiff.ac.uk/id/eprint/184512

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