皮层微观结构与遗传前性痴呆症的疾病严重程度和临床进展有关:GENFI研究
Elena Rodriguez-Vieitez1,2, Melissa T Rydell3,4, Abbe Ullgren3,4
1Department of Neurobiology, Care Sciences and Society, Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Stockholm, Sweden. elena.rodriguez-vieitez@ki.se.
Molecular psychiatry
|October 9, 2025
概括
皮层平均扩散度 (cMD) 检测到在遗传性前性痴呆症 (FTD) 中的早期大脑变化. 这种微观结构测量比皮质厚度 (CTh) 更敏感,用于跟踪疾病进展.
科学领域:
- 神经成像是一种神经成像.
- 神经退行发生神经退行.
- 遗传学 是一个遗传学.
背景情况:
- 遗传前性痴呆症 (FTD) 提供了关于症状前疾病阶段的见解.
- 研究早期生物标志物对于及时干预和治疗开发至关重要.
研究的目的:
- 为了确定皮质微结构变化 (cMD) 是否可以更早地检测到,并且与遗传FTD中的皮质厚度 (CTh) 比皮质厚度 (CTh) 更强烈地与临床进展相关.
- 评估cMD和CTh作为FTD早期检测和监测的潜在生物标志物.
主要方法:
- 利用24个GENFI站点的710个个体 (携带者和非携带者) 的T1加权和扩散加权的横截面MRI数据.
- 使用线性混合效应模型分析区域cMD和CTh,考虑年龄,性别,教育和地点.
- 在参与者的子集中使用剑桥行为库存修订和CDR盒子总和得分评估纵向临床结果.
主要成果:
- 在不同的基因FTD突变类型 (C9orf72,MAPT,GRN) 中,较早检测到升高的cMD.
- 皮质微结构损伤 (cMD) 在所有疾病阶段都显示出较强的效果大小和更广泛的分布,而不是皮质稀释 (CTh).
- 在所有突变载体类型中,cMD与随后的临床进展的关联比CTh更强.
结论:
- 通过cMD测量的皮质微观结构是比CTh更敏感的生物标志物,用于检测遗传FTD中的早期皮质损伤.
- cMD显示出在明显缩和临床进展之前识别有风险的个体的前景,有助于开发治疗试验.
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