A model for inhibition of kindling progression by 2DG.
(a) Under normal circumstances, NADH generated by glycolysis destabilizes the interaction of CtBP and NRSF, allowing transcription of NRSF target genes such as BDNF and TrkB and maintaining normal neuronal excitability. (b) Administration of 2DG inhibits glycolysis, reducing NADH concentrations. The co-repressor CtBP is recruited to form the NRSF:CtBP complex on NRSF target genes, reducing their transcription. Lower expression of BDNF and TrkB leads to reduced neuronal excitability, increasing seizure threshold and inhibiting progression of kindling.
生物谷报道:目前,研究人员研制出一种抑制小鼠癫痫发作的崭新方法,新结果显示糖酵解抑制剂有望成为癫痫治疗的新战略,这一最新研究报告发表在11月号的《自然—神经科学》上。
癫痫会侵袭世界上大约有1%的人口。然而,现有药物无法控制其中1/3患者的病情发作。一个事实让Garriga-Canut和同事深受启发:部分癫痫患者的病情因一种完全避免糖类的特制饮食而大有好转。这种特制配方的饮食名为生酮饮食,它是指高脂肪、低蛋白质和碳水化合物的一种饮食,数十年来主要用于治疗儿童难治性癫痫,临床疗效确切,副反应小,但其作用机制至今尚不清楚。
糖酵解是一种分解碳水化合物的过程,在癫痫患者体内这个过程被特定饮食抑制了。Garriga-Canut和同事用含糖酵解抑制剂2-脱氧-D-葡萄糖(2DG)的饮食治疗癫痫小鼠,结果发现小鼠发生癫痫的次数和严重程度大大降低了。
Garriga-Canut和同事推测,也许是糖酵解终端产物中的某一种物质增强了神经细胞的活性,因而抑制糖酵解可能会降低神经细胞的活性和癫痫发作的可能性。他们发现一种名为NADH的糖酵解产物可在转录因子NRSF的协助下与活性升高的CtBP结合,产生抑制癫痫的染色质环境,阻止糖酵解会降低这些基因的表达。
原文:
Nature Neuroscience - 9, 1382 - 1387 (2006)
2-Deoxy-D-glucose reduces epilepsy progression by NRSF-CtBP–dependent metabolic regulation of chromatin structure
Mireia Garriga-Canut & Avtar Roopra etal
Abstract | Full text | PDF (208K) | Supplementary Information
相关文献:
Nature Neuroscience - 9, 1351 - 1352 (2006)
Inhibiting glycolysis to reduce seizures: how it might work
Yang Zhong Huang & James O McNamara
Abstract | Full text | PDF (163K)
相关基因 pubmed gene:
CtBP
C-terminal Binding Protein [Drosophila melanogaster]
Other Aliases: Dmel_CG7583, 0256/16, 256/16, CG7583, EP(3)3528, G9, RE01030, RE61183, ctbp, dCtBP, l(3)G9
Other Designations: C-terminal Binding Protein CG7583-PA, isoform A; C-terminal Binding Protein CG7583-PB, isoform B; C-terminal Binding Protein CG7583-PC, isoform C; C-terminal Binding Protein CG7583-PD, isoform D; C-terminal Binding Protein CG7583-PE, isoform E
Chromosome: 3R; Location: 87D8-87D9
GeneID: 41602