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首页> 外文期刊>Clinical neuropharmacology >Valproate-induced hyperammonemic encephalopathy and normal liver functions: possible synergism with topiramate.
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Valproate-induced hyperammonemic encephalopathy and normal liver functions: possible synergism with topiramate.

机译:丙戊酸盐诱发的高氨性脑病和肝功能正常:可能与托吡酯协同作用。

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摘要

A patient with valproate-induced hyperammonemic encephalopathy presented with altered mental status and hyperammonemia in the context of normal liver functions. Fortunately, altered mental status and elevated plasma ammonia level normalized 1 day after discontinuation of divalproex sodium (Depakote). The case analysis suggests a possible synergistic interaction of valproic acid and topiramate with respect to the emergence of hyperammonemic encephalopathy in the context of normal liver functions. Possible mechanisms of the encephalopathy and hyperammonemia are discussed. For example, valproate has diverse metabolic effects that include regulating levels of ammonia by altering activity of the urea cycle, whose first step uses HCO3 in the synthesis of carbamoylphosphate. Topiramate's inhibition of carbonic anhydrase activity may be the basis of its possible synergy with valproate by affecting levels of HCO3.
机译:丙戊酸盐诱发的高氨性脑病患者在正常肝功能的情况下表现出精神状态和高氨血症改变。幸运的是,在停用divalproex钠(Depakote)后1天,精神状态改变和血浆氨水平升高得以恢复正常。病例分析表明,在正常肝功能的情况下,丙戊酸和托吡酯在高氨血症性脑病的出现方面可能存在协同作用。讨论了脑病和高氨血症的可能机制。例如,丙戊酸酯具有多种代谢作用,包括通过改变尿素循环的活性来调节氨水平,其第一步是在氨基甲酸酯磷酸酯的合成中使用HCO3。托吡酯对碳酸酐酶活性的抑制作用可能是其可能通过影响HCO3水平与丙戊酸盐协同作用的基础。

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