A novel mutation causes Hermansky-Pudlak syndrome type 4 with pulmonary fibrosis in 2 siblings from China.

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ID: 48111
2019
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Abstract
Hermansky-Pudlak syndrome (HPS) is a rare autosomal recessive multisystem disorder characterized by oculocutaneous albinism (OCA) and bleeding diathesis, although it displays both genetic and phenotypic heterogeneity. Several genetic subtypes of HPS have been identified in human; however, the characterizations of HPS type 4 (HPS-4) genotype and phenotype remain unclear. This study was aimed to identify gene mutation responsible for HPS-4 with pulmonary fibrosis (PF).Two Chinese siblings in their 50 s afflicted with OCA and progressive dyspnea were recruited and underwent clinical and genetic examinations. In both patients, chest high-resolution computerized tomography showed severe interstitial PF in bilateral lung fields, and the pulmonary function test indicated restrictive lung disease. A novel homozygous frameshift mutation (NM_022081: c.630dupC; p.A211fs) in the HPS4 gene was identified by whole-exome sequencing analysis followed by Sanger DNA sequencing, and it segregated with the phenotypes. The c.630dupC mutation was not found in unaffected healthy controls. The patients were considered as HPS-4 with interstitial PF and eventually died of respiratory failure.This is the first report on the genotype and clinical phenotype of HPS-4 in China. Our results demonstrate the association between a novel frameshift mutation in HPS4 and severe PF with poor prognosis in HPS is presented.
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wu2019amedicine Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Wu, Wenjuan;Lin, Keqin;Yang, Yanni;Dong, ZhaoXing;Zhang, Tao;Lei, Wen;Yang, Weimin;Yang, Zhaoqing;
Journal Medicine
Year 2019
DOI
10.1097/MD.0000000000016899
URL
Keywords
pathology pulmonary function high resolution ct lung diseases, interstitial small airways

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