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Related Experiment Videos

Human beta-mannosidase deficiency associated with peripheral neuropathy

T Levade1, D Graber, V Flurin

  • 1Laboratoire de Biochimie, Maladies Métaboliques, C.H.U. Rangueil, Toulouse, France.

Annals of Neurology
|January 1, 1994
PubMed
Summary

Human beta-mannosidosis, a rare inherited lysosomal storage disorder, is detailed in a new case study. This study highlights a 14-year-old boy with severe beta-mannosidase deficiency and neurological symptoms.

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Area of Science:

  • Biochemistry
  • Genetics
  • Neurology

Background:

  • Human beta-mannosidosis is an extremely rare inherited lysosomal storage disorder.
  • Previously documented in only seven families worldwide.

Observation:

  • A case of a 14-year-old Black African boy with beta-mannosidosis is presented.
  • The patient exhibited severe beta-mannosidase deficiency.
  • Clinical manifestations included bilateral thenar and hypothenar amyotrophy and peripheral neuropathy.

Findings:

  • Electrophysiological studies confirmed a demyelinating peripheral neuropathy.
  • Cytoplasmic vacuolation was observed in skin fibroblasts and lymphoid cells.
  • The patient's clinical and biochemical profile was compared with existing literature.

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Implications:

  • This case expands the known clinical spectrum and geographic distribution of beta-mannosidosis.
  • Further research is needed to understand the full impact of this rare genetic disorder.
  • Highlights the importance of early diagnosis and genetic counseling for affected families.