JAMA Neurol:血浆Aβ42和Aβ40测试用于临床AD检测

2019-07-01 MedSci MedSci原创

用Elecsys免疫分析法测定的血浆Aβ42和Aβ40预测AD各阶段的Aβ状态,在验证队列中的准确性相似。通过分析APOE基因型可进一步提高其准确性

对于阿尔茨海默病(AD)而言,精确的基于血液的生物标志物筛查可以早期干预的效果,近日研究人员考察了全自动检测法检验血浆β-淀粉样蛋白(Aβ)和tau的准确性。

在两项前瞻性,横断面,多中心研究中。研究参与者在2009年7月6日至2015年2月11日(队列1)和2000年1月29日至2006年10月11日(队列2)之间连续登记。第一个队列包括来自瑞典BioFINDER研究的842名参与者(513名认知未受损[CU]、265名轻度认知障碍[MCI]和64名AD痴呆患者)。验证队列包括来自德国生物标记物研究的237名参与者(34 CU、109 MCI和94例AD痴呆)。以脑脊液Aβ42/Aβ40比值作为脑Aβ状态的参考标准。

队列1中842名受试者的平均年龄为72岁,446名(52.5%)女性。对于队列2中的237名患者中,平均年龄为66岁, 120名(50.6%)女性。在队列1中,血浆Aβ42和Aβ40预测Aβ状态,受试者操作特征曲线(AUC)下面积为0.80。添加APOE时,AUC显著增加至0.85。在添加血浆tau(AUC 0.86)、TAU和NFL(AUC 0.87),效果轻微改善。队列2中,应用队列1的血浆Aβ42和Aβ40模型,结果发现AUC(0.86)略高,但血浆TAU无显著影响。在AD试验筛选中,使用血浆Aβ42、Aβ40和APOE,正电子发射断层扫描成本降低了30%到50%。

用Elecsys免疫分析法测定的血浆Aβ42和Aβ40预测AD各阶段的Aβ状态,在验证队列中的准确性相似。通过分析APOE基因型可进一步提高其准确性。

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    2020-04-27 feifers
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    2019-11-13 yinhl1978
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    2020-02-29 lfyang
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    2019-07-03 膀胱癌

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