生物标志物可区分精神分裂症和情感障碍

2015-06-29 高晓方 译 医学论坛网

基于MRI的精神分裂症标志物可在单一受试者水平对患者和健康对照者加以区分,但目前尚不清楚此类标志物能否可靠区分精神分裂症和生存期间情感障碍,并是否可将其推广至新患者和疾病早期患者。欧美学者对上述问题开展了一项研究,结果表明,神经解剖学信息有望提供可泛化工具,从而在精神病早期对精神分裂症和情感障碍加以区分。起病年龄、疾病分期和结构性脑成熟改变等病程相关

基于MRI的精神分裂症标志物可在单一受试者水平对患者和健康对照者加以区分,但目前尚不清楚此类标志物能否可靠区分精神分裂症和生存期间情感障碍,并是否可将其推广至新患者和疾病早期患者。欧美学者对上述问题开展了一项研究,结果表明,神经解剖学信息有望提供可泛化工具,从而在精神病早期对精神分裂症和情感障碍加以区分。起病年龄、疾病分期和结构性脑成熟改变等病程相关性变量均可能对严重抑郁和精神分裂症的神经解剖可区分性产生显著影响。论文近期在线发表于《脑》(Brain)杂志。

研究利用结构性基于MRI多变量模式分类确定并交叉验证了一项鉴别诊断标记,其可对首发和复发阶段精神分裂症和严重抑郁患者加以区分。研究同时对包括疾病分期、起病年龄和加速脑老化在内的主要临床变量对标记分类表现的定量影响进行了评估。然后在来自于两所不同中心的独立患者人群中对诊断性MRI标记进行评估,以检验其能否被泛化至双相情感障碍(35例)、首次发作精神病(23例)和临床定义高危精神病状态(89例)。

结果显示,在80%和72%的严重抑郁和精神分裂症患者中神经解剖诊断正确;与严重抑郁相比,精神分裂症存在前额-颞-边缘叶体积减少和前运动区、躯体感觉和皮质下增大模式。在精神分裂症中诊断表现不受抑郁症状存在影响的,在严重抑郁中其亦不受精神病症状的影响;但早期起病和脑老化加速可导致严重抑郁错误分类,原因在于此类患者的精神分裂症神经解剖学相似性升高。

此外,疾病分期可显著影响神经解剖学诊断,复发性疾病患者(严重抑郁23%,精神分裂症29%)的错误分类率高于首发患者(严重抑郁15%,精神分裂症12%)。改进生物标志物将74%的双相情感障碍患者分类入严重抑郁组,并将83%的首发精神病患者以及77%和61%的超高危和低危状态个体标记为精神分裂症。

原始出处:

Nikolaos Koutsouleris , Eva M. Meisenzahl , Stefan Borgwardt , Anita Riecher-Rössler , Thomas Frodl , Joseph Kambeitz , Yanis Köhler , Peter Falkai , Hans-Jürgen Möller , Maximilian Reiser , Christos Davatzikos.Individualized differential diagnosis of schizophrenia and mood disorders using neuroanatomical biomarkers.Brain, May 2, 2015.

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    2015-07-22 frankeiid

    生物谷好像有个生物标志物的会

    0

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    2015-07-04 huaxipanxing

    看看

    0

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