增加PDGFRB和NF-κB信号,这是由大脑内动脉瘤中高度流行的体质突变引起的
Yasuyuki Shima1,2, Shota Sasagawa3, Nakao Ota1,4
1Biomedical Neural Dynamics Collaboration Laboratory, RIKEN Center for Brain Science, Wako, Saitama 351-0198, Japan.
在内动脉瘤 (IA) 中,NF-κB信号基因的体质突变很常见,可能导致疾病的发展. 针对这些途径可能为IA提供新的治疗策略,并预防出血.
科学领域:
- 基因组学就是基因组学.
- 血管生物学 血管生物学
- 分子医学是分子医学.
背景情况:
- 内动脉瘤 (IAs) 构成危及生命的脑下关节下出血的重大风险.
- 对IA发展的确切原因在很大程度上是未知的.
- 了解AI病因对于制定有效的预防和治疗策略至关重要.
研究的目的:
- 调查偶发性体质突变在内动脉瘤发育中的作用.
- 识别涉及IA病变的特定基因和信号通路.
- 探索IA治疗的潜在治疗点.
主要方法:
- 65个IA组织和配对的血液样本的全外体和有针对性的深度测序.
- 在体外功能测试检查鉴定突变对信号通路的影响.
- 在小鼠体内动脉扩张模型以评估疾病机制和治疗反应.
- 患者衍生的血管的空间转录分析.
主要成果:
- 在IA组织中发现了高患病率 (92%) 的零星体质突变.
- 六个关键基因的突变,包括PDGFRB,AHNAK,OBSCN,RBM10,CACNA1E和OR5P3,在43%的IA中被发现,通常与NF-κB信号传递有关.
- 突变的PDGFRB构成性地激活了ERK和NF-κB信号,促进了细胞运动,并在体外诱导了炎症.
- 在小鼠中突变PDGFRB的过度表达诱导了状动脉扩张,这种动脉扩张被sunitinib治疗逆转.
结论:
- 与NF-κB信号通路相关基因的体质突变在状动脉瘤和囊状内动脉瘤中非常普遍.
- 这些突变通过改变信号通路和促进血管变化,有助于IA病原体.
- 向氨酸激酶,如苏尼蒂尼布,代表了对内动脉瘤的有前途的治疗途径.
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