Intractable epilepsy has poor therapeutic effect because of drug resistance. The project presents a new prevention strategy targeting to reversing the overexpression of multidrug transporters. Radix bupleuri keel and oyster soup is one of the classical traditional Chinese Medicine prescriptions in Treatise on Febrile Diseases. It has be used for the clinic treatment of epilepsy. But its mechanism of action remains unclear. The project discusses the correlativity between anti-epileptic effect of this prescription and the cyclooxygenase-2/prostaglandin E2-adenosine system passageway throught observing the changes in seizures and histomorphology of experimental mice after pentylenetetrazol-kindled epilepsy. The project detects the expression of P-glycoprotein(PGP),multidrug resistance-associated protein 1(MRP1),cyclooxygenase-2 (COX-2),prostaglandin E2(PGE2),adenosine kinase (ADK)in vivo and vitro experiments and analyzes the correlation of them. The project investigates if the antiepileptic action target of this prescription is multidrug transporters and this prescription reverses the overexpression of multidrug transporters by regulating the cyclooxygenase-2/prostaglandinE2-adenosine system passageway. The project is to explore the antiepileptic mechanism of Radix bupleuri keel and oyster soup starting from pathogenesis of drug resistance in intractable epilepsy. We hope that the project provide the theoretical basis for clinical application of this prescription and break a new view of the therapy to intractable epilepsy.
针对难治性癫痫由于耐药导致治疗效果不佳的现状,本项目提出以逆转MDTs过表达为靶点的新的防治策略。柴胡加龙骨牡蛎汤是《伤寒论》经方,已用于癫痫临床治疗,但其作用机制尚未阐明。本项目通过观察PTZ慢性点燃癫痫模型实验小鼠癫痫发作情况及脑组织病理形态学变化,探讨该方剂抗癫痫作用及其与COX-2/PGE2-腺苷系统通路的关系;通过在体和离体实验检测PTZ慢性点燃癫痫模型实验小鼠脑内和PTZ激活海马星形胶质细胞PGP、MRP1和COX-2、PGE2、ADK的表达变化并分析其相互关系,探讨柴胡加龙骨牡蛎汤抗癫痫作用的靶点是否为MDTs,以及柴胡加龙骨牡蛎汤是否通过调控COX-2/PGE2-腺苷系统通路逆转难治性癫痫MDTs过表达的。本项目从癫痫耐药性产生的发病机制出发,探讨了柴胡加龙骨牡蛎汤在难治性癫痫中的治疗作用及其可能机制,为该方剂的临床应用提供理论依据,为中西医结合治疗难治性癫痫开辟全新视野。
针对难治性癫痫由于耐药导致治疗效果不佳的现状,本项目提出以逆转MDTs过表达为靶点的新的防治策略。本项目从病理学角度研究了柴胡加龙骨牡蛎汤对戊四氮(Pentylenetetrazol,PTZ)点燃癫痫(Epilepsy,EP)小鼠大脑神经元的保护作用,探讨了柴胡皂苷a(SSa)对戊四氮(PTZ)诱导小鼠海马星形胶质细胞活化的抑制作用,探究了柴胡皂苷a(SSa)对戊四氮(PTZ)诱导小鼠海马星形胶质细胞的增殖及多药转运蛋白表达的影响,探讨了柴胡加龙骨牡蛎汤对戊四氮(PZT)点燃小鼠癫痫发作及脑损伤的影响,探讨了柴胡加龙骨牡蛎汤抗癫痫作用及其与COX-2/PGE2-腺苷系统通路的关系。结果显示SSa能够显著抑制PTZ诱导海马星形胶质细胞的活化,抑制细胞的增殖并诱导凋亡;柴胡加龙骨牡蛎汤具有抗癫痫效果,对PTZ点燃癫痫小鼠脑神经元具有保护作用;柴胡皂苷(SSa)可有效抑制PTZ诱导海马星形胶质细胞的增殖,同时降低细胞中多种多药转运蛋白以及ADK的表达;柴胡加龙骨牡蛎汤预处理可减轻小鼠PTZ点燃癫痫和脑损伤,其作用机制可能是由于COX依赖的机制,如PGE2合成的减少以及由此导致的神经炎症损伤的减少,可能与多药转运体的下调以及由此引起的ADK的下调有关。本项目从对MDTs表达的调节及对COX-2/PGE2-腺苷系统通路的影响入手探讨柴胡加龙骨牡蛎汤抗癫痫作用及其可能机制, 为其临床应用提供理论依据,为中西医结合治疗难治性癫痫开辟了全新视野。
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数据更新时间:2023-05-31
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