Biochemical and clinical response after umbilical cord blood transplant in a boy with early childhood-onset beta-mannosidosis.
Mol Genet Genomic Med
; 7(7): e00712, 2019 07.
Article
em En
| MEDLINE
| ID: mdl-31115173
ABSTRACT
BACKGROUND:
Deficiency in the enzyme ß-mannosidase was described over three decades ago. Although rare in occurrence, the presentation of childhood-onset ß-mannosidase deficiency consists of hypotonia in the newborn period followed by global development delay, behavior problems, and intellectual disability. No effective pharmacologic treatments have been available.METHODS:
We report 2-year outcomes following the first umbilical cord blood transplant in a 4-year-old boy with early childhood-onset disease.RESULTS:
We show restoration of leukocyte ß-mannosidase activity which remained normal at 2 years posttransplant, and a simultaneous increase in plasma ß-mannosidase activity and dramatic decrease in urine-free oligosaccharides were also observed. MRI of the brain remained stable. Neurocognitive evaluation revealed test point gains, although the magnitude of improvement was less than expected for age, causing lower IQ scores that represent a wider developmental gap between the patient and unaffected peers.CONCLUSION:
Our findings suggest that hematopoietic cell transplant can correct the biochemical defect in ß-mannosidosis, although preservation of the neurocognitive trajectory may be a challenge.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Transplante de Células-Tronco de Sangue do Cordão Umbilical
/
Beta-Manosidose
/
Beta-Manosidase
Tipo de estudo:
Diagnostic_studies
Limite:
Child, preschool
/
Humans
/
Male
Idioma:
En
Revista:
Mol Genet Genomic Med
Ano de publicação:
2019
Tipo de documento:
Article