An asymptomatic father diagnosed with 3-methylcrotonyl-CoA carboxylase deficiency following his son newborn screening test

Autor: Rosamaria Terracciano, Margherita Ruoppolo, Ferdinando Barretta, Lucia Albano, Daniela Crisci, Giovanna Gallo, Fabiana Uomo, Pietro Strisciuglio, Giancarlo Parenti, Giulia Frisso, Alessandro Rossi
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Molecular Genetics and Metabolism Reports, Vol 40, Iss , Pp 101116- (2024)
Druh dokumentu: article
ISSN: 2214-4269
DOI: 10.1016/j.ymgmr.2024.101116
Popis: 3-methylcrotonyl-CoA carboxylase deficiency (3MCCD) is a hereditary disorder of leucine catabolism caused by pathogenetic variants in the MCCC1 or MCCC2 genes. Typically diagnosed through newborn screening (NBS), 3MCCD is characterized by elevation of 3-hydroxyisovalerylcarnitine (C5OH) in blood as well as increased excretion of 3-methylcrotonylglycine (3-MCG) in urine. While most diagnosed children remain asymptomatic, data on adults are scarce. To date, only 39 molecularly confirmed adult individuals have been reported, all being mothers diagnosed subsequent to their child NBS results. Herein, we present a 36-year-old asymptomatic man who was incidentally diagnosed with 3MCCD following his son NBS recall. Molecular analysis revealed compound heterozygosity for two pathogenic variants in the MCCC1 gene. This is the first molecularly confirmed adult man with 3MCCD reported. This case highlights the need for additional longitudinal follow-up data on individuals with 3MCCD to clarify the clinical significance of this condition and guide clinical practice, including NBS strategy.
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