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Annals of Neurology : NT1 Tau可作为阿尔兹海默病的特异、早期标志物

2021-01-11 Freeman MedSci原创

NT1 Tau可作为阿尔兹海默病的特异、早期标志物

 
寻找灵敏的、可广泛应用的、以血液为基础的筛选检测方法去识别症状前期的AD的患者,非常有必要。
 
哈佛大学的David Mengel等人,最近开发了一种超灵敏免疫分析技术 NT1 tau,用于检测中区抗体 BT2(194-198)捕获的 tau 蛋白,并用 n 端抗体 taut12检测。NT1这个名字并不是商标,而是用来区分他们的检测方法和其他 N端 tau 检测方法,并非所有N端 tau 检测方法都检测到相同的 tau 分子形式。
 
事实上,tau 蛋白的分子异质性,使得基于不同抗 tau 蛋白组合的检测结果之间的比较充满挑战性。在之前的一项研究中,NT1分析法比室内分析法能更好地从对照组中区别AD 和 AD-MCI(轻度认知障碍),后者使用与 Quanterix 分析法相同的单克隆抗体,而且在两个独立的编码区 NT1 tau 中能有效地区分AD和对照组。
 
此外,神经纤维轻链(NfL)是轴突中特别丰富的神经元的细胞骨架成分。 NfL 在许多神经退行性疾病中水平升高,多项研究发现在单纯性 AD 或临床前 AD, 血清和血浆中 NfL 水平升高。相比之下,在那些进展为AD痴呆和non-AD痴呆的患者中,相对于对照组,其基线的NfL也更高。
 
他们分别在MCI,AD痴呆,non-AD 痴呆,对照组中检测血浆中的NT1 tau和NfL水平。
 
结果显示,和对照组相比,AD中的NT1 tau水平显著升高,而在non-AD却并非增加。但NfL在AD和non-AD痴呆中均明显升高。而那些从MCI进展为AD痴呆的患者中,其基线的NT1 tau水平也更高。
 
这个研究的重要意义在于:发现血浆 NT1 tau 是 AD 的一个更为特异性标志物(相对于NfL),在疾病早期升高,并且可作为第一轮筛查用于确定 AD 风险个体。
 
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    2021-10-16 yinhl1978
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    2021-01-12 hb2008ye
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    2021-01-11 Dr.King3348

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