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Identification of novel mutations in BCKDHB and DBT genes in Vietnamese patients with maple sirup urine disease.

Abstract：

BACKGROUND:Maple sirup urine disease (MSUD) is an autosomal recessive inherited metabolic disorder. The disease-causing mutations can affect the BCKDHA, BCKDHB, and DBT genes encoding for the E1α, E1β, and E2 subunits of the multienzyme branched-chain α-keto acid dehydrogenase (BCKDH) complex. In the present study, novel pathogenic variants in BCKDHB and DBT genes were identified in three Vietnamese families with MSUD. METHODS:Three newborn patients from three unrelated Vietnamese families were diagnosed with MSUD at the Metabolic Clinic, National Hospital of Pediatrics. Blood samples of 11 relatives from two generations of the three families diagnosed with MSUD were analyzed using exome and Sanger sequencing analyses. RESULTS:Novel pathogenic variants in BCKDHB (c.1103C>T, c.989A>G, and c.704G>A), and DBT (c.263_265delAAG) genes were identified in three pediatric patients with MSUD. CONCLUSIONS:We have identified novel pathogenic variants in the MSUD-related genes in the pedigree of the three patient's families. Our findings expand the mutational spectrum of MSUD and provide the scientific basis for genetic counseling for the patient's families.

journal_name

Mol Genet Genomic Med

journal_title

Molecular genetics & genomic medicine

authors

Nguyen TTN,Vu CD,Nguyen NL,Nguyen TTH,Nguyen NK,Nguyen HH

doi

10.1002/mgg3.1337

subject

Has Abstract

pub_date

2020-08-01 00:00:00

pages

e1337

issue

8

issn

2324-9269

journal_volume

8

pub_type

杂志文章

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