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Neurology:慢性创伤性脑损伤的淀粉样蛋白和 Tau 成像: 一个横向研究

2022-08-02 Naomi MedSci原创

创伤性脑损伤(tBI)已被认为是阿尔茨海默病的一个危险因素。与健康对照组相比,单一的中度至重度 TBI 与慢性期 β-淀粉样蛋白或 tau 病变的负担较高无关。

创伤性脑损伤(tBI)已被认为是阿尔茨海默病的一个危险因素。有证据表明,在创伤性脑损伤之后,阿尔茨海默病的病理特征—— β 淀粉样蛋白和 tau 蛋白升高。目前尚不清楚 β 淀粉样蛋白和 tau 蛋白在慢性期是否仍然升高。为了解决这个问题,近日,使用 PET 成像评估了长期 TBI 幸存者和健康对照者的 β 淀粉样蛋白和 tau 蛋白负荷。

采用横断面设计,招募了至少10年前从住院康复计划中接受过一次中重度创伤性脑损伤的患者。从社区中招募了一个人口统计学上相似的健康对照组。PET 数据采用18F-NAV4694(淀粉样蛋白 -β)和18F-MK6240(tau)示踪剂。淀粉样 β 沉积的定量使用蜈蚣尺度。在四个感兴趣的区域(ROI)使用标准化摄取值比(SUVR)对 Tau 沉积进行定量。作为次要的测量方法,PET 扫描也被视为阳性或阴性。检查了 PET 数据与受伤时间和受伤年龄的关系。PET 数据进行一系列回归分析。

 

  • 样本包括87名 TBI 患者(男性71.3% ; 女性28.7% ; M = 57.53岁,SD = 11.53)和59名对照者(男性59.3% ; 女性40.7% ; M = 60.34岁,SD = 11.97)。
  • TBI 患者在任何 ROI 中没有显着更高的18F-NAV4694 Centioid 值(p = 0.067)或18F-MK6240 tau SUVR (p = ≤0.001; 对照的 SUVR 更大)。
  • 视觉评估与量化结果一致; TBI 患者不太可能比对照组具有阳性淀粉样蛋白 -β (p = 0.505)或 tau 扫描(p = 0.221)。自损伤(p = 0.057至0.332)或损伤年龄以来,没有发现淀粉样蛋白 -β 或 tau 负荷与时间的关联。

与健康对照组相比,单一的中度至重度 TBI 与慢性期 β-淀粉样蛋白或 tau 病变的负担较高无关。受伤后多年,淀粉样蛋白 -β 和 tau 负荷没有显着增加,受伤时年龄较大的患者负荷似乎也没有增加。

 

文献来源:

Montine TJ, Corrada MM, Kawas C, et al. Association of Cognition and Dementia With Neuropathologic Changes of Alzheimer Disease and Other Conditions in the Oldest-Old [published online ahead of print, 2022 Jun 15]. Neurology. 2022;10.1212/WNL.0000000000200832. doi:10.1212/WNL.0000000000200832

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    2023-04-23 amyloid
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    2023-04-16 yinhl1978
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    2022-08-02 hb2008ye

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