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小檗碱改善大鼠海马内红藻氨酸诱导的癫痫持续状态及随后的致痫过程:潜在机制

Berberine ameliorates intrahippocampal kainate-induced status epilepticus and consequent epileptogenic process in the rat: Underlying mechanisms.

作者信息

Sedaghat Reza, Taab Yosra, Kiasalari Zahra, Afshin-Majd Siamak, Baluchnejadmojarad Tourandokht, Roghani Mehrdad

机构信息

Department of Anatomy and Pathology, School of Medicine, Shahed University, Tehran, Iran.

School of Medicine, Shahed University, Tehran, Iran.

出版信息

Biomed Pharmacother. 2017 Mar;87:200-208. doi: 10.1016/j.biopha.2016.12.109. Epub 2017 Jan 3.

Abstract

Status epilepticus (SE) is a life-threatening neurologic condition, instigating epileptogenesis to transform normal brain to an epileptic condition. SE is followed by spontaneous recurrent seizures (SRS) and final development of temporal lobe epilepsy (TLE) that is resistant to treatment. Neuroprotective strategies are increasingly put forward as a promising therapy to prevent and/or manage epileptic conditions. In this study, we investigated whether berberis alkaloid, i.e. berberine (BBR), could ameliorate intrahippocampal kainate-induced SE and its consequent epileptogenic process and to explore some underlying mechanisms. BBR was daily administered at doses of 25 or 50mg/kg. Results showed that BBR treatment of kainate-microinjected rats at a dose of 50mg/kg lowered the incidence of SE and SRS. It also significantly restored hippocampal level of reactive oxygen species (ROS), glutathione (GSH), nuclear factor (erythroid-derived 2)-like 2 (Nrf2), activity of catalase and caspase 3, nuclear factor-B (NF-κB), toll-like receptor 4 (TLR4), tumor necrosis factor α (TNFα), interleukin-1β (IL-1β), neural cell adhesion molecule (NCAM), glial fibrillary acidic protein (GFAP), cathepsin D, and heme oxygenase 1 (HO-1). Additionally, BBR protected against hippocampal CA3 neuronal loss and prevented development of aberrant mossy fiber sprouting (MFS) as an essential element of chronic epileptogenic circuit. These data suggest that BBR could mitigate SE and SRS in intrahippocampal kainate model of epilepsy and exert neuroprotective effect and its influence is mainly mediated via suppression of oxidative stress, neuroinflammation, and possibly apoptosis.

摘要

癫痫持续状态(SE)是一种危及生命的神经系统疾病,可引发癫痫发生,使正常大脑转变为癫痫状态。SE之后会出现自发性复发性癫痫发作(SRS),最终发展为耐药性颞叶癫痫(TLE)。神经保护策略作为一种有前景的预防和/或治疗癫痫疾病的疗法,正越来越多地被提出。在本研究中,我们调查了小檗碱生物碱,即黄连素(BBR),是否能改善海马内注射海藻酸诱导的SE及其随后的癫痫发生过程,并探索一些潜在机制。BBR每天以25或50mg/kg的剂量给药。结果表明,以50mg/kg的剂量对注射海藻酸的大鼠进行BBR治疗可降低SE和SRS的发生率。它还显著恢复了海马中活性氧(ROS)、谷胱甘肽(GSH)、核因子(红系衍生2)样2(Nrf2)的水平、过氧化氢酶和半胱天冬酶3的活性、核因子-κB(NF-κB)、Toll样受体4(TLR4)、肿瘤坏死因子α(TNFα)、白细胞介素-1β(IL-1β)、神经细胞黏附分子(NCAM)、胶质纤维酸性蛋白(GFAP)、组织蛋白酶D和血红素加氧酶1(HO-1)。此外,BBR可防止海马CA3神经元丢失,并预防异常苔藓纤维发芽(MFS)的发生,而MFS是慢性癫痫发生回路的一个关键要素。这些数据表明,BBR可减轻海马内注射海藻酸癫痫模型中的SE和SRS,并发挥神经保护作用,其影响主要通过抑制氧化应激、神经炎症以及可能的细胞凋亡来介导。

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