Alagille综合征患儿1例临床和遗传学分析：一个包含JAG1基因的染色体新中间缺失的识别

Alagille综合征（ALGS）是一种常染色体显性遗传病,可累及肝脏、心脏、骨骼、眼睛、肾脏、颜面等多个系统。本文报道1例ALGS患儿的临床和遗传学特征。患儿为3个月10d男婴,因发现皮肤、巩膜黄染3个月就诊。体格检查示：宽额头,小下颌;胸骨左缘第2、3肋间可闻及3~4/6级收缩期杂音;腹部膨隆,肝右肋下3cm可触及,质地中等。生化结果示肝功能明显异常,胆红素升高,且以结合胆红素升高为主,伴总胆汁酸和γ-谷氨酰转肽酶显著升高。心脏彩超示房间隔缺损、肺动脉狭窄。二代测序发现该患儿JAG1基因整体杂合缺失,而染色体微阵列分析在患儿20号染色体p12.3p12.2处检出约3.0Mb缺失,该范围包含...

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Bibliographic Details
Published in:	Zhongguo dang dai er ke za zhi Vol. 19; no. 10; pp. 1098 - 1103
Main Author:	李华刘佳佳邓梅郭丽程映宋元宗
Format:	Journal Article
Language:	Chinese English
Published:	中国长沙中国当代儿科杂志编辑部 25-10-2017
Subjects:	Alagille综合征 Clinical Research JAG1基因二代测序儿童染色体微阵列论著·临床研究
Online Access:	Get full text
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Summary:	Alagille综合征（ALGS）是一种常染色体显性遗传病,可累及肝脏、心脏、骨骼、眼睛、肾脏、颜面等多个系统。本文报道1例ALGS患儿的临床和遗传学特征。患儿为3个月10d男婴,因发现皮肤、巩膜黄染3个月就诊。体格检查示：宽额头,小下颌;胸骨左缘第2、3肋间可闻及3~4/6级收缩期杂音;腹部膨隆,肝右肋下3cm可触及,质地中等。生化结果示肝功能明显异常,胆红素升高,且以结合胆红素升高为主,伴总胆汁酸和γ-谷氨酰转肽酶显著升高。心脏彩超示房间隔缺损、肺动脉狭窄。二代测序发现该患儿JAG1基因整体杂合缺失,而染色体微阵列分析在患儿20号染色体p12.3p12.2处检出约3.0Mb缺失,该范围包含ALGS致病基因JAG1。该患儿具备特殊面容、心脏畸形和胆汁淤积等临床表现,结合遗传学分析结果,诊断ALGS明确。确诊后给予对症支持治疗,现已随访至生后11个月,胆红素较治疗前明显下降,但总胆汁酸和γ-谷氨酰转肽酶等指标仍明显升高,其远期预后仍有待随访观察。本研究扩展了JAG1基因突变谱,同时为患儿诊断、治疗及家系遗传咨询和产前诊断提供了实验室依据。
Bibliography:	43-1301/R LI Hua, LIU Jia-Jia, DENG Mei, GUO Li, CHENG Ying, SONG Yuan-Zong. （Department of Pediatrics, First Affiliated Hospital, Jinan University, Guangzhou 510632, China ） Alagille syndrome（ALGS） is an autosomal dominant disease affecting multiple systems including the liver, heart, skeleton, eyes, kidneys and face. This paper reports the clinical and genetic features of an infant with this disease. A 3-month-and-10-day-old female infant was referred to the hospital with jaundiced skin and sclera for 3 months. Physical examination revealed wide forehead and micromandible. A systolic murmur of grade 3-4/6 was heard between the 2th and 3th intercostal spaces on the left side of the sternum. The abdomen was distended, and the liver palpable 3 cm under the right subcostal margin with a medium texture. Serum biochemistry analysis revealed abnormal liver function indices, with markedly elevated bilirubin（predominantly direct bilirubin）, total bile acids（TBA） and gamma-glutamyl transpeptidase（GGT）. Atrial septal de
ISSN:	1008-8830
DOI:	10.7499/j.issn.1008-8830.2017.10.013