Movement Disorder : 胶质细胞成像,可鉴别帕金森和多系统萎缩

2021-10-30 Freeman MedSci原创

MSA患者的区域神经胶质TSPO结合明显增加的模式。

多系统萎缩(MSA)是一种罕见的致命的神经系统疾病,病因不明。其临床表现的特点是运动和自主神经功能障碍。根据运动表现,MSA被分为帕金森型(MSA-P)和小脑型(MSA-C)。

一个主要的临床挑战是如何区分MSA-P和PD或MSA-C和特发性晚发性小脑共济失调之间的关系。尽管目前的临床诊断标准在疾病后期表现良好,但据报道,首次检查的敏感性仅达到30%左右,而且明确的MSA诊断仍依赖于死后检查。因此,开发敏感的生物标志物用于早期诊断是一个重要的医学需求,特别是在疾病改造试验的病人招募方面。

MSA的神经病理学特点是胶质和神经元的细胞质内含物,其中含有折叠错误的α-突触核蛋白(αSYN),特别是导致黑质和小脑结构中神经元的突出损失。MSA的病理进展伴随着神经炎症,表现为促炎症细胞因子水平的升高和广泛的小胶质增生。 一小部分MSA患者体内的胶质反应已被报道,使用正电子发射断层扫描(PET)成像的易位蛋白(TSPO)是小胶质细胞和星形细胞的标志物。因此,TSPO成像可以提供关于MSA病理生理学的额外信息,并有可能用于诊断目的。


藉此,卡洛琳斯卡大学的Aurelija Jucaite等人,研究了TSPO成像对MSA和PD以及MSA亚型之间的诊断敏感性和特异性。除了视觉阅读,他们还应用了机器学习(ML)方法来获得MSA的胶质细胞成像特征。

他们利用66名MSA患者和24名PD患者的影像资料分析了[11 C]PBR28与TSPO的结合。组别比较是基于参数图像的区域分析。诊断读数包括针对临床诊断和机器学习分析的PET图像的视觉读数。敏感性、特异性和ROC曲线被用来区分MSA和PD以及小脑和帕金森变异MSA。

他们发现:与PD相比,MSA的区域性[11 C]PBR28与TSPO的结合明显升高,"热点 "出现在天形核和小脑白质。

视觉阅读将MSA与PD区分开来,特异性为100%,敏感性为83%。机器学习方法将敏感性提高到96%。并确定了MSA亚型特异的TSPO结合模式。


该研究的主要意义在于发现了:MSA患者的区域神经胶质TSPO结合明显增加的模式。有趣的是,其数据与MSA的严重神经炎症相一致。神经胶质成像可能有潜力支持临床MSA的诊断和病人分层,以进行新的药物治疗的临床试验。


原文出处:
Jucaite A, Cselényi Z, Kreisl WC, et al. Glia Imaging Differentiates Multiple System Atrophy from Parkinson’s Disease: A Positron Emission Tomography Study with 11C PBR28 and Machine Learning Analysis. Mov Disord. Published online October 5, 2021:mds.28814. doi:10.1002/mds.28814

 

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    2022-01-15 cmsvly
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    2022-02-19 chendoc252
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    2021-10-31 1474dc1am45暂无昵称

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帕金森病的认知能力下降与胆碱能系统退化有关,这可以使用基底前脑体积的结构性MRI标记物和皮质胆碱能活性的PET测量在体内进行评估。

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帕金森病是一种进行性神经退行性疾病,具有运动和非运动症状,包括睡眠功能障碍。非运动症状对生活质量有负面影响,并且通常比运动症状更令人烦恼。

European Radiology:使用多模态PET/MRI放射组学识别帕金森病和多系统萎缩

放射组学是指从医学影像中高通量提取丰富的影像信息,以辅助医生做出最准确的诊断。现阶段,放射组学已广泛应用于肿瘤学研究,如肿瘤的诊断、分级、疗效评估、预后预测等。

2024 NICE 诊断指南:帕金森病远程监测设备 [DG51]

英国国家卫生与临床优化研究所(NICE,National Institute for Health and Clinical Excellence) · 2024-01-25

2023 NICE 技术鉴定指南:左旋多巴/卡比多巴组合治疗伴有运动症状的晚期帕金森病[TA934]

英国国家卫生与临床优化研究所(NICE,National Institute for Health and Clinical Excellence) · 2023-11-29

帕金森病患者睡眠障碍评估与护理干预的最佳证据总结

浙江中医药大学护理学院 · 2023-08-10

早中期帕金森病患者运动管理的最佳证据总结

山东第一医科大学附属省立医院老年神经内科 · 2023-05-10