Science:高风险阿尔兹海默氏症的年轻人或大脑存在异常

2015-10-27 佚名 生物谷

图片来源:medicalxpress.com 最近,一项刊登在国际杂志Science上的研究论文中,来自德国神经退行性疾病中心的科学家们通过研究表示,患有阿尔兹海默氏症风险的年轻人的大脑或许在处理空间导航上相比正常个体存在一定差异。研究者指出,当然是否这种大脑改变是患阿尔兹海默氏症的先兆还不得而知,目前具体的研究机制还并不清楚,还需要进行大量的研究才可以得知。 研究者Axmacher表示,

图片来源:medicalxpress.com

最近,一项刊登在国际杂志Science上的研究论文中,来自德国神经退行性疾病中心的科学家们通过研究表示,患有阿尔兹海默氏症风险的年轻人的大脑或许在处理空间导航上相比正常个体存在一定差异。研究者指出,当然是否这种大脑改变是患阿尔兹海默氏症的先兆还不得而知,目前具体的研究机制还并不清楚,还需要进行大量的研究才可以得知。

研究者Axmacher表示,如果大脑的差异的确可以帮助预测个体后期会患阿尔兹海默氏症,那么利用相关的研究信息或许就可以发现高风险的患病个体;这项研究中研究人员对75名年轻人进行研究,其中一半个体机体中都携带有APOE突变基因,该基因被认为可以增加个体患阿尔兹海默氏症的风险。

据估计每6个个体中就有1人携带APOE4突变基因,而且携带者的患病风险是不携带者的三倍;研究者利用先进的MRI技术对参与者的大脑内嗅皮层结构进行了研究,内嗅皮层包括所谓的网格单元细胞,这些细胞对于个体进行空间导航非常重要,当阿尔兹海默氏症发生时,个体空间导航的能力就会缺失。随后研究人员让参与者进行导航任务,同时记录参与者机体网格细胞的活性,研究结果表明,在任务进行期间,相比未携带APOE4突变基因的个体而言,携带者的网格细胞功能表现较差。

于是研究者就提问说,是否携带APOE4突变基因的个体通过其它大脑区域来进行导航来尝试弥补缺失呢?研究者发现,个体网格细胞越不完整,其附近大脑区域的活性就越强烈,因此APOE4突变基因携带者在实验中更趋于表现出一种完全不同的策略。

截至目前为止并没有有效的疗法可以帮助抑制阿尔兹海默氏症,但本文的研究或可帮助研究人员开发新型的疗法,而且研究人员也需要寻找特殊的生物标志物来用于临床试验中高风险患病个体的检测。

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    2015-10-29 jichang
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    2015-10-28 梦想天空

    0

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    2015-10-27 vpssa

    从小就有机会发现。

    0

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一项临床2期,随机、双盲、安慰剂对照临床试验评估Circadin®(2毫克缓释褪黑素)在阿尔兹海默病 (AD) 患者标准疗法中的安全性和疗效。这份研究刊登在近日出版的Clinical Interventions in Aging杂志上,表明该药物对 AD 患者认知能力和保持睡眠具有积极的疗效(PDF文件下载)。 Neurim Pharmaceuticals 临床试验负责人 Tali Nir 博士