与ACKR1/DARC相关的中性质的临床和免疫学特征
Jan Palmblad1, Ebba Sohlberg2, Christer C Nilsson1
1The Hematology Center, Karolinska University Hospital Huddinge and Department of Medicine, Huddinge, Karolinska Institutet, Stockholm, Sweden.
与ACKR1/DARC相关的中性质疏松症 (ADAN) 可能比以前认为的中性细胞数量更低,有时会模仿严重的先天性中性质疏松症. 与SCNP患者不同的是,ADAN患者表现出明显的免疫特征,并且没有骨髓质疏松综合征.
科学领域:
- 遗传学和免疫学 遗传学和免疫学
- 血液学 血液学 血液学
背景情况:
- 与ACKR1/DARC相关的中性缺陷症 (ADAN) 是一种常见于非洲或中东血统个体的遗传性疾病,与特定基因变异 (rs2814778) 有关.
- 之前的理解表明中性质减退较轻,但其临床表现和相关的免疫特征需要进一步阐明.
研究的目的:
- 在基因确诊的ADAN受试者队列中描述中性质衰竭的严重程度.
- 调查ADAN的临床过程,相关的免疫失调以及潜在的并发症.
- 根据临床和免疫学发现,区分ADAN和严重先天性中性缺血症 (SCNP).
主要方法:
- 对66名遗传确认ADAN受试者的绝对中性粒细胞计数 (ANC) 的分析.
- 在327个人年内进行纵向观测,以评估骨髓质疏松综合征 (MDS).
- 与健康对照组相比,对中性粒细胞,血细胞因子,单细胞群和抗菌水平的自身抗体的评估.
主要成果:
- 一部分ADAN受试者 (9%) 的ANC值低至0.10.49 × 10^9/L,类似于SCNP.
- 在炎症发作期间,ANC经常正常化.
- 在ADAN受试者中没有观察到MDS的病例,与SCNP形成鲜明对比.
- 在ADAN中发现了抗中性粒细胞自身抗体的意外高患病率 (22%).
- 独特的免疫特征包括较低的人类阴离子抗微生物蛋白-18/LL-37,非经典单细胞增加和细胞因子水平变化.
结论:
- 亚丹可以呈现比以前认可的更严重的中性,可能会使SCNP的差异诊断复杂化.
- 独特的免疫学特征,包括自身抗体和改变的炎症标志物,表明在ADAN病原或后果中存在复杂的相互作用.
- 亚丹似乎有不同的临床轨迹比SCNP,特别是缺乏MDS的发展.
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