放射治疗后脑出血的病理特征:病例系列与体质突变分析
Roberto J Alcazar-Felix1, Abhinav Srinath1, Stephanie Hage1
1Department of Neurosurgery, Biological Sciences Division, University of Chicago, USA.
概括
放射治疗后的大脑出血与异常的血管和基因突变有关,但不是导致大脑洞腔形的突变. 这表明一种新的信号通路可能参与了辐射诱导的大脑出血.
科学领域:
- 神经学 神经学
- 辐射瘤学 辐射瘤学
- 病理学 病理学 病理学
背景情况:
- 治疗大脑疾病的辐射疗法可能会导致出血的不良影响.
- 辐射后脑出血的病理基础及其与人体突变的联系仍然不清楚.
研究的目的:
- 为了阐明辐射后脑出血的病理基质.
- 为了调查与诱导体质突变的潜在关联.
主要方法:
- 5个活检样本 (4名患者) 的回顾性审查,在脑辐射后出现出血性病变.
- 组织病理学分析 (H&E,珀尔的普鲁士蓝色,马森的三色素) 和免疫染 (CD20,CD3,CD31,CD163,α-SMA,TUNEL).
- 脑血管异常相关基因体突变的下一代测序.
主要成果:
- 确定了两个模式:封装的血瘤和洞穴状的形.
- 所有的病变都显示出带有异形内皮和炎症反应的telangiectasias.
- 在DNA分析中发现了PIK3CA和/或PTEN的遗传变异,但在脑洞腔形 (CCM) 基因中没有.
结论:
- 辐射后的大脑出血与原始洞穴状透视细胞和异血管生成基因破坏有关.
- 这些遗传变化与导致典型大脑洞穴性形的遗传变化不同.
- 一个新的信号轴可能与辐射诱导的大脑出血有关.
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