Anticonvulsant effect of equilibrative nucleoside transporters 1 inhibitor in a mouse model of Dravet syndrome

IF 2.4 3区 医学 Q3 NEUROSCIENCES Hippocampus Pub Date : 2023-11-06 DOI:10.1002/hipo.23584
Shih-Yin Ho, I-Chun Chen, Che-Wen Tsai, Kai-Chieh Chang, Chun-Jung Lin, Yijuang Chern, Horng-Huei Liou
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Abstract

There are limited therapeutic options for patients with Dravet syndrome (DS). The equilibrative nucleoside transporters 1 (ENT1) mediate both the influx and efflux of adenosine across the cell membrane exerted beneficial effects in the treatment of epilepsy. This study aimed to evaluate the anticonvulsant effect of the ENT1 inhibitor in an animal model of DS (Scn1aE1099X/+ mice). J7 (5 mg/kg) treatment was efficacious in elevating seizure threshold in Scn1aE1099X/+ mice after hyperthermia exposure. Moreover, the J7 treatment significantly reduced the frequency of spontaneous excitatory post-synaptic currents (sEPSCs, ~35% reduction) without affecting the amplitude in dentate gyrus (DG) granule cells. Pretreatment with the adenosine A1 receptor (A1R) antagonist, DPCPX, abolished the J7 effects on sEPSCs. These observations suggest that the J7 shows an anticonvulsant effect in hyperthermia-induced seizures in Scn1aE1099X/+ mice. This effect possibly acts on presynaptic A1R-mediated signaling modulation in granule cells.

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平衡核苷转运蛋白1抑制剂在Dravet综合征小鼠模型中的抗惊厥作用。
Dravet综合征(DS)患者的治疗选择有限。平衡核苷转运蛋白1(ENT1)介导腺苷通过细胞膜的流入和流出,在癫痫的治疗中发挥了有益的作用。本研究旨在评估ENT1抑制剂在DS动物模型(Scn1aE1099X/+小鼠)中的抗惊厥作用。J7(5 mg/kg)治疗对提高高温暴露后Scn1aE1099X/+小鼠的癫痫阈值是有效的。此外,J7治疗显著降低了自发兴奋性突触后电流的频率(sEPCs,降低约35%),而不影响齿状回(DG)颗粒细胞的振幅。腺苷A1受体(A1R)拮抗剂DPCPX预处理消除了J7对sEPSCs的影响。这些观察结果表明,J7在高温诱导的Scn1aE1099X/+小鼠癫痫发作中显示出抗惊厥作用。这种作用可能作用于颗粒细胞中突触前A1R介导的信号调节。
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来源期刊
Hippocampus
Hippocampus 医学-神经科学
CiteScore
5.80
自引率
5.70%
发文量
79
审稿时长
3-8 weeks
期刊介绍: Hippocampus provides a forum for the exchange of current information between investigators interested in the neurobiology of the hippocampal formation and related structures. While the relationships of submitted papers to the hippocampal formation will be evaluated liberally, the substance of appropriate papers should deal with the hippocampal formation per se or with the interaction between the hippocampal formation and other brain regions. The scope of Hippocampus is wide: single and multidisciplinary experimental studies from all fields of basic science, theoretical papers, papers dealing with hippocampal preparations as models for understanding the central nervous system, and clinical studies will be considered for publication. The Editor especially encourages the submission of papers that contribute to a functional understanding of the hippocampal formation.
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