背景:大约13-25%的脑静脉血栓形成(CVT)病例缺乏明确的病因,这可能与潜在的遗传因素有关。本研究旨在使用全外显子组测序(WES)研究CVT患者的遗传因素。
方法:38例CVT住院患者行WES。977名受试者的WES数据来自社区队列研究-顺义队列作为对照组。利用生物信息学分析,筛选出两组间具有罕见损伤变异的差异基因(P<0.05)。对筛选的基因进行KEGG富集分析以鉴定与CVT相关的途径。
结果:通过分析病史,常规测试,和影像学检查,38例患者的病因:抗磷脂综合征8例,6例血液病,3例蛋白C缺乏症,蛋白S缺乏2例。5例发生在孕期或产褥期,3例有口服避孕药史,等等。12例(31.6%)病因不明,通过WES:F9c.838+1_838+16del进一步阐明了4例患者的病因,半合子:F9EX1-EX7Dup;CBSc.430G>A,CBSc.949A>G;F2c.1787G>A;SERPINC1c.409-11G>T。比较两组的WES数据,共筛选了179个具有罕见损伤变异的不同基因(P<0.05),具有5个感兴趣的基因(JAK2,C3,PROC,PROZ,SERPIND1).对179个不同基因的富集分析表明,补体和凝血途径以及丝裂原活化蛋白激酶(MAPK)途径与CVT相关。
结论:对于病因不明的CVT患者,WES可以帮助及早确定CVT的原因,这对治疗决策和预后具有重要意义。除了补体和凝血途径,MAPK通路与CVT有关,可能与血小板调节和炎症反应有关。
BACKGROUND: About 13-25% of cerebral venous thrombosis (CVT) cases lack clear etiology, which may be associated with underlying genetic factors. This study aims to investigate genetic factors in CVT patients using whole exome sequencing (WES).
METHODS: Thirty-eight CVT patients hospitalized underwent WES. 977 subjects with WES data from a community cohort study --the Shunyi cohort were as the control group. Using bioinformatics analysis, differential genes with rare damaging variants between two groups were filtered (P < 0.05). KEGG enrichment analysis was performed on the screened genes to identify pathways associated with CVT.
RESULTS: Through analysis of medical history, routine tests, and imaging examinations, the etiology of 38 patients: 8 cases of antiphospholipid syndrome, 6 cases with hematologic diseases, 3 cases of protein C deficiency, and 2 cases of protein S deficiency. Five cases occurred during pregnancy or puerperium, and 3 cases had a history of oral contraceptive use, and so on. The etiology was unknown in 12 cases (31.6%), and the etiology of 4 patients were further clarified through WES: F9 c.838 + 1_838 + 16del, Hemizygote: F9 EX1-EX7 Dup; CBS c.430G > A, CBS c.949 A > G; F2 c.1787G > A; SERPINC1 c.409-11G > T. Comparing the WES data of two groups, a total of 179 different genes with rare damaging variants were screened (P < 0.05), with 5 genes of interest (JAK2, C3, PROC, PROZ, SERPIND1). Enrichment analysis of the 179 different genes revealed the complement and coagulation pathway and the mitogen activated protein kinases (MAPK) pathway were associated with CVT.
CONCLUSIONS: For CVT patients with unknown etiology, WES could help identify the cause of CVT early, which is of great significance for treatment decisions and prognosis. In addition to the complement and coagulation pathway, MAPK pathway is associated with CVT, potentially related to platelet regulation and inflammatory response.