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- W4378647918 endingPage "23.2023" @default.
- W4378647918 startingPage "ENEURO.0041" @default.
- W4378647918 abstract "Lateralization of hippocampal function is indicated by varied outcomes of patients with neurologic disorders that selectively affect one hemisphere of this structure, such as temporal lobe epilepsy (TLE). The intrahippocampal kainic acid (IHKA) injection model of TLE allows for targeted damage to the left or right hippocampus, enabling systematic comparison of effects of left-right asymmetry on seizure and nonseizure outcomes. Although varying nonseizure phenotypic outcomes based on injection side in dorsal hippocampus were recently evaluated in this model, differences in chronic seizure patterns in left- (IHKA-L) versus right-injected (IHKA-R) IHKA animals have yet to be evaluated. Here, we assessed hippocampal seizure incidence in male and female IHKA-L and IHKA-R mice. Females displayed increased electrographic seizure activity compared with males at both two and four months postinjection. In addition, IHKA-L females showed higher seizure frequency than IHKA-R on diestrus and estrus at two months postinjection, but seizure duration and percent time in seizures were only higher in IHKA-L females on diestrus. These cycle stage-associated changes, however, did not persist to four months postinjection. Furthermore, this lateralized difference in seizure burden was not observed in males. These results indicate for the first time that the side of IHKA injection can shape chronic electrographic seizure burden. Overall, these results demonstrate a female-specific left-right asymmetry in hippocampal function can interact with estrous cycle stage to shape chronic seizures in mice with epilepsy, with implications for neural activity and behavior in both normal and disease states." @default.
- W4378647918 created "2023-05-30" @default.
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- W4378647918 date "2023-05-29" @default.
- W4378647918 modified "2023-10-15" @default.
- W4378647918 title "Sex and Estrous Cycle Stage Shape Left-Right Asymmetry in Chronic Hippocampal Seizures in Mice" @default.
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- W4378647918 doi "https://doi.org/10.1523/eneuro.0041-23.2023" @default.
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