Blood:Evans综合征患儿携带高频的免疫基因突变

2019-04-06 不详 MedSci原创

Evans(伊文氏)综合征(ES)是一种罕见的重度自身免缺陷,特点是同时表现为自身免疫性溶血性贫血(AIHA)和免疫性血小板减少性紫癜。迄今为止,该病的发病机制基本尚未明确。基于Evans综合征可能是遗传性疾病这一推测,Jéreme Hadjadj等研究人员尝试从儿科ES(pES)患者中寻找遗传缺陷。研究人员对一个有203位早发性ES患者的前瞻性队列(起始于2004年,随访16.3年[1.2-41

Evans(伊文氏)综合征(ES)是一种罕见的重度自身免缺陷,特点是同时表现为自身免疫性溶血性贫血(AIHA)和免疫性血小板减少性紫癜。迄今为止,该病的发病机制基本尚未明确。

基于Evans综合征可能是遗传性疾病这一推测,Jéreme Hadjadj等研究人员尝试从儿科ES(pES)患者中寻找遗传缺陷。研究人员对一个有203位早发性ES患者的前瞻性队列(起始于2004年,随访16.3年[1.2-41.0])中的80位非选定的连续个体进行基因检测。根据遗传结果分析临床资料。

52位(65%)患者得到遗传确诊(M+组):49位携带生殖细胞突变,3位携带体细胞突变。34位(40%)患者在已知的与原发性免疫缺陷相关的基因(TNFRSF6、CTLA4、STAT3、PIK3CD、CBL、ADAR1、LRBA、RAG1和KRAS)上携带致病性突变,另有20位(25%)患者在16个既往未报到与自发性免疫病相关的基因上携带可能的致病突变。

最后,在剩余的28位(35%,M-组)中未发现遗传异常。M+组患者的病情比M-组患者的更严重,额外的免疫病理表现的发生率更高,需要的治疗也更多。在研究过程中,6位患者死亡(全是M+组)。

综上所述,至少65%的pES病例可能是由基因决定的。应对pES患者进行更系统、更广泛的遗传筛查,有助于预测预后、指导靶向治疗。

原始出处:

Jéreme Hadjadj, et al. Pediatric Evans syndrome is associated with a high frequency of potentially damaging variants in immune genes. Blood 2019 :blood-2018-11-887141; doi: https://doi.org/10.1182/blood-2018-11-887141 

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