A Classic Case of Maple Syrup Urine Disease and a Novel Mutation in the BCKDHA Gene
نویسندگان
چکیده مقاله:
Background: Maple syrup urine disease (MSUD) is an inherited branched-chain amino acid metabolic disorder caused by the deficiency in the branched-chain alpha-keto acid dehydrogenase (BCKD) complex. In MSUD, elevation of the branched-chain amino acids, such as alpha-keto acid and alpha-hydroxy acid, occurs due to the BCKDC gene deficiency, appearing in the blood, urine, and cerebrospinal fluid, which leads to neurological damage and mental retardation. MSUD phenotypically penetrates due to the mutations in the coding genes of four subunits of the BCKD complex, including the BCKDHA, BCKDHB, DBT, and DLD genes.Case report: We aimed to report the cases of three families whose children were affected by MSUD and presented with symptomatic features during the first week of birth, which were identified by mass spectrometry. DNA study was performed as a diagnosis panel containing four encoded BCKDC subunit genes.Conclusion: In the current study, DNA analysis and phenotypic manifestations indicated a novel mutation of c.143delT, p.L48Rfs*15 in the BCKDHA gene in a homozygous state, which is a causative mutation for the classic MSUD phenotype. Early diagnosis and neonatal screening are recommended for the accurate and effective treatment of this disease
منابع مشابه
Maple syrup urine disease--a case report.
Maple syrup urine disease is a rare autosomal recessive inborn error of metabolism of branch chain amino acids the condition is named because of distinctive sweet odour of affected infants urine. MSUD is caused by deficiency of branch chain alpha keto acid dehydrogenase enzyme complex, leading to accumulation of the branch chain amino acids (leucine, isoleucine, valine) and their toxic by produ...
متن کاملMaple syrup urine disease
Maple syrup urine disease (MSUD) is an autosomal recessive condition with an incidence of approximately 1 in 150 000 live births with a higher incidence amongst children from consanguineous relationships [1]. It is caused by an enzymatic deficiency with reduction in oxidative decarboxylation of branched-chain amino acids (BCAA) (leucine, isoleucine and valine) resulting in elevated levels and t...
متن کاملMaple Syrup Urine Disease
Alternative Names MSUD Branched-Chain Ketoaciduria Branched-Chain Alpha-Keto Acid Dehydrogenase Deficiency BCKD Deficiency Keto Acid Decarboxylase Deficiency Maple Syrup Urine Disease, Classic Maple Syrup Urine Disease, Intermediate Maple Syrup Urine Disease, Intermittent Maple Syrup Urine Disease, Thiamine-Responsive Maple Syrup Urine Disease, E3-Deficient, with Lactic Acidosis Maple Syrup Uri...
متن کامل[Maple syrup urine disease].
Branched chain a-ketoacid dehydrogenase (BCKDH) deficiency results in maple syrup urine disease (MSUD). We examined the molecular basis of familial cases ofMSUD by analyzing the activity, subunit structure, mRNA sequence, and genome structure of the affected enzyme. The BCKDH activity in the proband with MSUD was 6% ofthe normal control level. Immunoblot analysis revealed that the ElB subunit o...
متن کاملMaple syrup urine disease
Maple syrup urine disease (MSUD) is an autosomal recessive condition with an incidence of approximately 1 in 150 000 live births with a higher incidence amongst children from consanguineous relationships [1]. It is caused by an enzymatic deficiency with reduction in oxidative decarboxylation of branched-chain amino acids (BCAA) (leucine, isoleucine and valine) resulting in elevated levels and t...
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عنوان ژورنال
دوره 8 شماره 3
صفحات 72- 74
تاریخ انتشار 2017-09-01
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