Identification of deep intronic variants of PAH in phenylketonuria using full-length gene sequencing

Chuan Zhang, Yousheng Yan, Bingbo Zhou, Yupei Wang, Xinyuan Tian, Shengju Hao, Panpan Ma, Lei Zheng, Qinghua Zhang, Ling Hui, Yan Wang, Zongfu Cao, Xu Ma

科研成果: 期刊稿件文章同行评审

4 引用 (Scopus)

摘要

Background: Phenylketonuria (PKU) is an autosomal recessive congenital metabolic disorder caused by PAH variants. Previously, approximately 5% of PKU patients remained undiagnosed after Sanger sequencing and multiplex ligation-dependent probe amplification. To date, increasing numbers of pathogenic deep intronic variants have been reported in more than 100 disease-associated genes. Methods: In this study, we performed full-length sequencing of PAH to investigate the deep intronic variants in PAH of PKU patients without definite genetic diagnosis. Results: We identified five deep intronic variants (c.1199+502A>T, c.1065+241C>A, c.706+368T>C, c.706+531>C, and c.706+608A>C). Of these, the c.1199+502A>T variant was found at high frequency and may be a hotspot PAH variant in Chinese PKU. c.706+531T>C and c.706+608A>C are two novel variants that extend the deep intronic variant spectrum of PAH. Conclusion: Deep intronic variant pathogenicity analysis can further improve the genetic diagnosis of PKU patients. In silico prediction and minigene analysis are powerful approaches for studying the functions and effects of deep intronic variants. Targeted sequencing after full-length gene amplification is an economical and effective tool for the detection of deep intron variation in genes with small fragments.

源语言英语
文章编号128
期刊Orphanet Journal of Rare Diseases
18
1
DOI
出版状态已出版 - 12月 2023
已对外发布

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