Department of Pharmacology and Toxicology, Indiana University School of Medicine, IUPUI campus, Indianapolis, IN 46202, USA.
Department of Biology, Purdue School of Science, IUPUI campus, Indianapolis, IN 46202, USA.
Int J Mol Sci. 2020 Apr 1;21(7):2454. doi: 10.3390/ijms21072454.
Many epilepsy patients are refractory to conventional antiepileptic drugs. Resurgent and persistent currents can be enhanced by epilepsy mutations in the Nav1.2 channel, but conventional antiepileptic drugs inhibit normal transient currents through these channels, along with aberrant resurgent and persistent currents that are enhanced by Nav1.2 epilepsy mutations. Pharmacotherapies that specifically target aberrant resurgent and/or persistent currents would likely have fewer unwanted side effects and be effective in many patients with refractory epilepsy. This study investigated the effects of cannbidiol (CBD) and GS967 (each at 1 μM) on transient, resurgent, and persistent currents in human embryonic kidney (HEK) cells stably expressing wild-type hNav1.2 channels. We found that CBD preferentially inhibits resurgent currents over transient currents in this paradigm; and that GS967 preferentially inhibits persistent currents over transient currents. Therefore, CBD and GS967 may represent a new class of more targeted and effective antiepileptic drugs.
许多癫痫患者对抗癫痫药物耐药。Nav1.2 通道的癫痫突变可增强复发性和持续性电流,但传统抗癫痫药物通过这些通道抑制正常的瞬时电流,同时抑制由 Nav1.2 癫痫突变增强的异常复发性和持续性电流。专门针对异常复发性和/或持续性电流的药物治疗可能具有更少的不良反应,并且对许多耐药性癫痫患者有效。本研究调查了大麻二醇(CBD)和 GS967(各 1 μM)对稳定表达野生型 hNav1.2 通道的人胚肾(HEK)细胞中的瞬时、复发性和持续性电流的影响。我们发现,在这种情况下,CBD 优先抑制复发性电流而不是瞬时电流;而 GS967 优先抑制持续性电流而不是瞬时电流。因此,CBD 和 GS967 可能代表一类更有针对性和更有效的抗癫痫药物。