生物标志物 生物标志物
Belen Pascual1, Alireza Faridar1, Quentin Finn1
1Houston Methodist Research Institute, Houston, TX, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
干白素-2免疫疗法改善了阿尔茨海默病的生物标志物和认知功能,但转位蛋白 (TSPO) PET成像没有改变. 未来的研究可能需要新的PET标记剂来检测炎症.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 放射化学 放射化学是指辐射化学.
背景情况:
- 转位蛋白 (TSPO) PET成像通过向微质细胞和巨细胞来评估大脑炎症.
- 目前的TSPO PET标记器无法区分促炎 (M1) 和抗炎 (M2) 微质表型.
- 在针对炎症的阿尔茨海默病 (AD) 临床试验中,TSPO PET的实用性尚未得到充分研究.
研究的目的:
- 用C-ER176 TSPO PET在阿尔茨海默病患者的免疫调节性Interleukin-2 (IL-2) 临床试验前后评估大脑炎症的变化.
- 评估IL-2免疫治疗对T调节 (Treg) 细胞种群,脑脊液 (CSF) 生物标志物和认知功能的影响.
主要方法:
- 一个2a期,随机,双盲,安慰剂对照试验,涉及38名AD患者 (50-86岁).
- 参与者每4周接受IL-2 (IL-2 q4wks),每2周接受IL-2 (IL-2 q2wks) 或21周接受安慰剂.
- 在治疗前和后进行了C-ER176PET扫描,脑脊液/血液生物标志物和临床评估.
主要成果:
- 在所有组中都没有观察到TSPO PET结合的显著变化.
- 两种IL-2疗法都增加了Treg数量和功能;IL-2 q4wks显示出更大的疗效.
- 与安慰剂相比,IL-2 q4wks组在CSF Aβ42和趋势向稳定的CSF NfL显著改善,GFAP水平降低.
- 与安慰剂相比,IL-2 q4wks组观察到认知衰退的减缓.
结论:
- 在 q4wks 频率的 IL-2 免疫疗法增强了 Treg 种群,并显示了 AD 生物标志物和认知功能的有前途趋势.
- 使用C-ER176的TSPO PET成像在21周的试验中没有检测到大脑炎症的显著变化.
- 未来的AD临床试验可能会从更长的随访,更大的样本大小或针对特定免疫细胞表型 (M1/M2巨细胞) 或其他炎症途径的新型PET标记物中获益.
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