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中国科学家发现遗传性癫痫病新成因

2016-01-05 张赭等 科学网

遗传性癫痫是危害巨大的神经系统疾病,特别在婴幼儿中的癫痫病患中更加多发。近年来全基因组测序发现多种Slack 钾离子通道的突变体可以引起遗传性癫痫,但其生物物理机制及对疾病的预防和治疗的影响尚未阐明。 日前,徐州医学院唐琼瑶、张赭教授课题组利用爪蟾卵母细胞表达系统,将12个Slack通道的突变体异位表达到爪蟾的卵母细胞中,并采用膜片钳技术测量了这些通道突变体的钠离子敏感性和单


遗传性癫痫是危害巨大的神经系统疾病,特别在婴幼儿中的癫痫病患中更加多发。近年来全基因组测序发现多种Slack 钾离子通道的突变体可以引起遗传性癫痫,但其生物物理机制及对疾病的预防和治疗的影响尚未阐明。

日前,徐州医学院唐琼瑶、张赭教授课题组利用爪蟾卵母细胞表达系统,将12个Slack通道的突变体异位表达到爪蟾的卵母细胞中,并采用膜片钳技术测量了这些通道突变体的钠离子敏感性和单通道开放可能性的变化。研究表明这些突变体钠离子敏感性有变化,但是不是导致通道过度开放的主要原因。而通道开放最大可能性的提高才是通道突变体导致神经元异常放电的根本原因。这项研究阐释了Slack钾离子通道突变体导致癫痫的生物物理机制,相关成果发表于《细胞报告》。

这项研究不仅解释了Slack通道突变体导致Slack通道活性增加的生物物理因素,也为将来进一步在体研究将Slack通道作为癫痫治疗的药物靶点奠定了基础。这项研究也进一步指出只有在细胞内钠离子浓度超出正常生理浓度较大时,Slack通道突变体的开放可能性才有较大的变化。因此,在体神经元兴奋性在何种条件下受到Slack通道活性的调节尚需进一步的研究。

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    2016-01-10 丁丁医生2002

    这个很厉害??

    0

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