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Rats with Malformations of Cortical Development Exhibit Decreased Length of AIS and Hypersensitivity to Pilocarpine-Induced Status Epilepticus

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Abstract

Malformations of cortical development (MCD) are critical brain development disorders associated with varied abnormalities in both anatomic structures and neural functioning. It is also a very common etiology to the epilepsy, in which the alteration on excitability of cortical neurons is hypothesized as one of important causes to the epileptic seizures. Due to the key role in regulating neuron firing properties, the plasticity of axon initial segment (AIS) was investigated in present study to further determine the relation between MCD and epilepsy. Our results showed a prolonged decrease in the length of AIS occurred in MCD animal models. Besides, the AIS was also found greatly shortened in MCD models during the acute, but not chronic phase of status epileptics compared with intact controls. Our findings of identification of AIS plasticity in MCD animal models and its hypersensitivity to status epilepsy are significant in furthering our understanding of the pathophysiological mechanisms involved in this disorder.

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Acknowledgments

This study was supported by National Natural Science Foundation of China (No. NNSF-81000553).

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    Authors and Affiliations

    1. Department of Neurology, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu Area, Changsha, 410008, Hunan Province, People’s Republic of China

      Yelan Wang, Danni Sun, Zongwei Yue, Weiting Tang, Bo Xiao & Li Feng

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    1. Yelan Wang
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    2. Danni Sun
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    3. Zongwei Yue
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    4. Weiting Tang
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    Correspondence to Bo Xiao or Li Feng.

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    The author(s) declare(s) that there is no conflict of interests regarding the publication of this paper.

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    Yelan Wang and Danni Sun contributed equally to this article.

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    Wang, Y., Sun, D., Yue, Z. et al. Rats with Malformations of Cortical Development Exhibit Decreased Length of AIS and Hypersensitivity to Pilocarpine-Induced Status Epilepticus. Neurochem Res 41, 2215–2222 (2016). https://doi.org/10.1007/s11064-016-1936-7

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    • DOI: https://doi.org/10.1007/s11064-016-1936-7

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