Variant analysis of HPD genes from two families showing elevated tyrosine upon newborn screening by tandem mass spectrometry (MS/MS).
J Pediatr Endocrinol Metab
; 33(4): 563-567, 2020 Apr 28.
Article
en En
| MEDLINE
| ID: mdl-32109208
ABSTRACT
Background Alterations in the structure and activity of 4-hydroxyphenylpyruvate dioxygenase (HPD) are causally related to two different metabolic disorders recessively inherited tyrosinemia type III and dominantly inherited hawkinsinuria. The aim of this study was to provide a new perspective for the clinical understanding of the pathogenesis of tyrosinemia type III or hawkinsinuria. Case presentation A full-term newborn baby born after a safe pregnancy and childbirth with a birth weight of 3200 g and another full-term baby born after a safe pregnancy and childbirth with a birth weight of 2800 g are reported and analysed. DNA extraction, next-generation sequencing, bioinformatics analysis, Sanger sequencing and biochemical analysis were performed. One patient with a heterozygous HPD gene (NM_002150.2) c.460G > A mutation and one patient with a heterozygous HPD gene (NM_002150.2) c.248delG mutation showing elevated tyrosine levels upon newborn screening by tandem mass spectrometry (MS/MS) are reported. Conclusions The HPD gene may not be a strictly autosomal recessive pathogenic gene, which provides a new perspective for the clinical understanding of the pathogenesis of tyrosinemia type III or hawkinsinuria.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Tirosina
/
Tamizaje Neonatal
/
Tirosinemias
/
Oxigenasas de Función Mixta
/
4-Hidroxifenilpiruvato Dioxigenasa
/
Mutación
Tipo de estudio:
Diagnostic_studies
/
Screening_studies
Límite:
Female
/
Humans
/
Male
/
Newborn
Idioma:
En
Revista:
J Pediatr Endocrinol Metab
Asunto de la revista:
ENDOCRINOLOGIA
/
PEDIATRIA
Año:
2020
Tipo del documento:
Article
País de afiliación:
China