血腺脱胺酶2活性和ADA2变体的诊断影响和相关性
Jian Yue1,2, Courtney E LeSon1, Casey A Rimland1,3
1Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts.
血腺脱氨酶2 (ADA2) 酶活性测定对于诊断DADA2,一种罕见的自身炎症性疾病,具有高度准确性. 患者可能会出现残留的ADA2活性,并且与炎症症状有关.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 遗传学是一种遗传学.
- 生物化学 生物化学
背景情况:
- 腺脱氨酶2 (DADA2) 缺乏症是一种单源性自身炎症性疾病.
- 达达2呈现多关节炎,中风和骨髓衰竭.
研究的目的:
- 评估血ADA2酶活性试验的诊断效用.
- 描述DADA2患者残留的ADA2活性对DADA2患者的影响.
主要方法:
- 从200个DADA2病例和对照 (2018-2025) 中收集的数据.
- 使用光谱光度测量测量了血ADA2活性.
- 通过酶试验和西部涂抹在转染细胞中分析了ADA2变异.
主要成果:
- 血ADA2活性测定显示了对DADA2诊断的高灵敏度 (99.0%) 和特异性 (99.7%).
- 9%的DADA2患者有可检测的ADA2活性,与炎症表型相关.
- 实验室研究显示,错误的ADA2变异通过蛋白质聚合引起主导负面影响.
结论:
- 血ADA2活动测定是DADA2.2的宝贵诊断工具.
- 在DADA2中观察到剩余的ADA2活性,并与炎症症状有关.
- ADA2变体可以通过聚合和主导负效应来破坏蛋白质功能.
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