Molecular Psychiatry:内侧前脑束上外侧支深部脑刺激治疗难治性抑郁症后的代谢变化与临床反应相关

2022-08-26 影像小生 MedSci原创

DBS后的代谢变化与临床反应相关

抑郁症是一种非常普遍和令人衰弱的疾病,影响着全球数百万人,尽管采用多种治疗方法,但仍有高达30%的患者没有获得缓解,这导致了医疗保健利用率的提高。寻找非药物方法来治疗难治性抑郁症是必须的。因此,深部脑刺激(DBS)试验出现了,使用历史消融靶点作为指导,改进了使用神经成像和束摄影来识别可能的功能障碍回路。DBS的目标包括胼胝体下扣带回(Cg25),腹侧囊/腹侧纹状体(VC/VS),内囊腹侧前肢,伏隔核(NAc),以及近期的内侧前脑束上外侧支(slMFB)。这条从腹侧被盖区(VTA)投射的白质通路将来自VTA的多巴胺能输入与前额叶皮层连接起来,刺激后者最终缓解抑郁症状,改善快感缺乏和动机观察到抗抑郁药在几周内快速反应,并持续超过5年,与其他组一样,反应率超过66%。

对内侧前脑束上外侧支进行深部脑刺激(Deep brain stimulation, DBS)是治疗难治性抑郁症的一种有效疗法,可提供快速的抗抑郁效果。

最近Molecular Psychiatry刊发了Christopher RConner等的研究文章,该研究小组使用18F -氟脱氧葡萄糖-正电子发射断层扫描(PET)来识别10例患者植入DBS后12个月的脑代谢变化,并将其与基线相比。

该研究的主要结局测量指标是蒙哥马利-Åsberg抑郁评定量表(MADRS)得分降低50%,意为反应。采用确定性光纤跟踪方法对目标区域进行单独映射;采用概率性白质纤维束追踪识别调制纤维束模型使用阴极接触。

表1.纳入患者的人口统计学资料和术后12个月的临床评分

该研究纳入的10例患者中有8例是有反应的。

组概率性DTI分析

表2.与基线相比,6个月、12个月随访PET变化


6个月、12个月组PET分析。

1.       PET成像显示双侧尾状核、中脑背侧丘脑和背侧前扣带回皮质代谢在术后6个月和12个月明显下降。术后12个月,左侧腹侧前额叶皮质代谢也明显下降。

2.       12个月时右尾状核代谢减少与MADRS平均减少显著相关。

所有受试者尾状核的平均PET变化和MADRS评分

 3.       概率性DTI模型显示,这种代谢变化沿皮质边缘节点在结构上连接到DBS的目标部位。

DBS对slMFB产生强大的,可持续的抗抑郁治疗那些难治性抑郁症患者。经过12个月的slMFB DBS后,观察到PET阐明的代谢变化,与其他刺激其他抑郁靶点的报告一致,涉及情感网络的皮质边缘节点。然而,DBS疗效背后的功能影像学相关机制仍处于早期阶段。搜索

对于术前预测DBS反应的生物标志物,最好结合结构、功能和电生理学方法。

综上所述,这些观察到的DBS后的代谢变化与临床反应相关,为未来的研究如何详细阐述这些数据以创建预测反应的生物标志物提供了见解,而这一研究的发展可能需要多模态成像分析。

 

原文出处

Conner CR, Quevedo J, Soares JC, Fenoy AJ. Brain metabolic changes and clinical response to superolateral medial forebrain bundle deep brain stimulation for treatment-resistant depression [published online ahead of print, 2022 Aug 19]. Mol Psychiatry. 2022;10.1038/s41380-022-01726-0. doi:10.1038/s41380-022-01726-0

https://www.nature.com/articles/s41380-022-01726-0

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    2022-08-27 amyloid
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    2022-08-27 freve
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    2022-08-26 小小医者

    #深部脑刺激#治疗难治性#抑郁症#,这是重要的发展方向,不过未来能否有一种刺激方式,不需要手术,直接在头皮表面,就能将电刺激信号传递到指定的大脑核团,那就牛X了。

    0

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