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• W2904009063 endingPage "199" @default.
• W2904009063 startingPage "188" @default.
• W2904009063 abstract "Autism spectrum disorder (ASD) is a common neuropsychiatric disorder, which is characterized by impairment in social interaction and cognitive behaviors. However, there is not much electrophysiological data available on alterations of neuronal excitability in autism. Here, we assessed the pattern of neuronal excitability and the possible contribution of Ih current to the altered excitability of hippocampal CA1 pyramidal neurons in a rat model of VPA-induced ASD-like behavior. Pregnant Wistar rats received valproic acid (VPA, 500 mg/kg) at gestational day 12.5. All offspring were subjected to behavioral tests to verify the induction of ASD-like behaviors. On postnatal day (PND) 45, whole-cell patch-clamp recordings were performed on hippocampal CA1 pyramidal neurons in slices obtained from control and prenatal VPA-exposed pups, under current and voltage-clamp conditions. Our results showed that beside the induction of behavioral abnormalities in ASD pups, higher excitability of hippocampal CA1 pyramidal neurons was also prominent, as evidenced by a significant increase in the spontaneous firing frequency and evoked firing rate, as well as a significant decrease in the rheobase current. In the VPA-exposed group, the steady-state (ISS) Ih current amplitude was significantly smaller than control cells. The Ih half-activation voltage shifted toward more negative potentials in the VPA-exposed group. The sag ratio was also significantly less than the control cells. Moreover, the cell soma size was shifted toward smaller diameter in VPA-exposed group. Overall, induction of ASD-like behaviors was associated with neuronal hyperexcitability, which, at least in part, could be attributed to the changes in Ih channels function." @default.
• W2904009063 created "2018-12-22" @default.
• W2904009063 creator A5007815716 @default.
• W2904009063 creator A5026328666 @default.
• W2904009063 creator A5039824945 @default.
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• W2904009063 creator A5058863585 @default.
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• W2904009063 creator A5080594230 @default.
• W2904009063 date "2019-04-01" @default.
• W2904009063 modified "2023-10-18" @default.
• W2904009063 title "Hyperexcitability of hippocampal CA1 pyramidal neurons in male offspring of a rat model of autism spectrum disorder (ASD) induced by prenatal exposure to valproic acid: A possible involvement of Ih channel current" @default.
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• W2904009063 doi "https://doi.org/10.1016/j.brainres.2018.12.011" @default.
• W2904009063 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30537517" @default.
• W2904009063 hasPublicationYear "2019" @default.
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