婴儿肝内胆汁淤积症患儿的临床特征及基因分析

目的 分析婴儿肝内胆汁淤积症患儿的临床资料及基因变异特点。方法 收集2017年6月至2019年6月于首都儿科研究所附属儿童医院消化内科就诊的疑似遗传代谢性婴儿肝内胆汁淤积症患儿的临床资料，采用目标基因捕获结合高通量测序技术进行基因检测，并进行Sanger验证。结果 共纳入40例患儿，13例（32%）患儿发现致病基因，包括3例SLC25A13基因突变导致的希特林蛋白缺乏症，3例JAG1基因突变导致的Alagille综合征，3例ABCB11基因突变导致的进行性家族性肝内胆汁淤积症2型，1例HSD3B7基因突变导致的先天性胆汁酸合成障碍1型，1例AKR1D1基因突变导致的先天性胆汁酸合成障碍2型，1例NPC1基因突变导致的尼曼匹克病，1例CFTR基因突变导致的囊性纤维化。结论 婴儿肝内胆汁淤积症病因繁多，高通量测序技术对临床疑似遗传代谢病的肝内胆汁淤积症患儿的诊断有重要价值。

Clinical characteristics and gene variants of patients with infantile intrahepatic cholestasis

Objective To explore the clinical characteristics and genetic findings of patients with infantile intrahepatic cholestasis. Methods The clinical data were collected in children who were admitted to the Department of Gastroenterology in Children''s Hospital, Capital Institute of Pediatrics from June 2017 to June 2019 and were suspected of inherited metabolic diseases. Next generation sequencing based on target gene panel was used for gene analysis in these children. Sanger sequencing technology was used to verify the genes of the members in this family. Results Forty patients were enrolled. Pathogenic gene variants were identified in 13 patients (32%), including SLC25A13 gene variation in 3 patients who were diagnosed with citrin deficiency, JAG1 gene variation in 3 patients who were diagnosed with Alagille syndrome, ABCB11 gene variation in 3 patients who were diagnosed with progressive familial intrahepatic cholestasis type 2, HSD3B7 gene variation in 1 patient who was diagnosed with congenital bile acid synthesis defect type 1, AKR1D1 gene variation in 1 patient who was diagnosed with congenital bile acid synthesis defect type 1, NPC1 gene variation in 1 patient who was diagnosed with Niemann-Pick disease, and CFTR gene variation in 1 patient who was diagnosed with cystic fibrosis. Conclusions The etiology of infantile intrahepatic cholestasis is complex. Next generation sequencing is helpful in the diagnosis of infantile intrahepatic cholestasis.