Homozygosity for disease-causing variants in AMT and GLDC in a patient with severe nonketotic hyperglycinemia.
Am J Med Genet A
; 194(8): e63622, 2024 08.
Article
en En
| MEDLINE
| ID: mdl-38572626
ABSTRACT
Nonketotic hyperglycinemia (NKH) is a relatively well-characterized inborn error of metabolism that results in a combination of lethargy, hypotonia, seizures, developmental arrest, and, in severe cases, death early in life. Three genes encoding components of the glycine cleavage enzyme system-GLDC, AMT, and GCSH-are independently associated with NKH. We report on a patient with severe NKH in whom the homozygous pathogenic variant in AMT (NM_000481.3)c.602_603del (p.Lys201Thrfs*75) and the homozygous likely pathogenic variant in GLDC(NM_000170.2)c.2852C>A (p.Ser951Tyr) were both identified. Our patient demonstrates a novel combination of two homozygous disease-causing variants impacting the glycine cleavage pathway at two different components, and elicits management- and genetic counseling-related challenges for the family.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Hiperglicinemia no Cetósica
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Homocigoto
Límite:
Female
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Humans
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Infant
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Male
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Newborn
Idioma:
En
Año:
2024
Tipo del documento:
Article