The First Korean Adult Case of Progressive Familial Intrahepatic Cholestasis Type 7 with Novel USP53 Splicing Variants by Next Generation Sequencing
- Author:
Soomin AHN
1
;
Jonggi CHOI
;
Sook-Hyang JEONG
Author Information
- Publication Type:Case Report
- From:Yonsei Medical Journal 2023;64(12):745-749
- CountryRepublic of Korea
- Language:English
- Abstract: Progressive familial intrahepatic cholestasis (PFIC) is a group of rare genetic disorders caused by defects in biliary epithelial transporters. It mostly presents as low γ-glutamyltransferase cholestasis. Recently, USP53 has been identified as one of the novel genes associated with PFIC. Herein, we report a 21-year-old Korean male patient with a late-onset PFIC. Initial work-up, including whole genome sequencing, did not find any associated gene. However, reviewing sequencing data identified novel compound heterozygous variants in splicing site of USP53 (NM_001371395.1:c.972+3_972+6del, and c.973-1G>A). The patient’s bilirubin level fluctuated during the disease course. At 4.5 years after the initial presentation, the patient’s symptom and high bilirubin level were normalized after administration of high-dose ursodeoxycholic acid. Recognition of this disease entity is important for prompt diagnosis and management. USP53 is recommended for the work-up of low γ-glutamyltransferase cholestasis.
