Neurological deficits in mice with profound biotinidase deficiency are associated with demylination and axonal degeneration

Kirit Pindolia, Jieli Chen, Cisley Cardwell, Xu Cui, Michael Chopp, Barry Wolf*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Biotinidase deficiency is an autosomal recessively inherited disorder characterized by neurological and cutaneous abnormalities. We have developed a transgenic knock-out mouse with biotinidase deficiency to better understand aspects of pathophysiology and natural history of the disorder in humans. Neurological deficits observed in symptomatic mice with biotinidase deficiency are similar to those seen in symptomatic children with the disorder. Using a battery of functional neurological assessment tests, the symptomatic mice performed poorly compared to wild-type mice. Demyelination, axonal degeneration, ventriculomegaly, and corpus callosum compression were found in the brains of untreated, symptomatic enzyme-deficient mice. With biotin treatment, the symptomatic mice improved neurologically and the white matter abnormalities resolved. These functional and anatomical findings and their reversal with biotin therapy are similar to those observed in untreated, symptomatic and treated individuals with biotinidase deficiency. The mouse with biotinidase deficiency appears to be an appropriate animal model in which to study the neurological abnormalities and the effects of treatment of the disorder.

Original languageEnglish (US)
Pages (from-to)428-435
Number of pages8
JournalNeurobiology of Disease
Volume47
Issue number3
DOIs
StatePublished - Sep 2012

Keywords

  • Axonal damage
  • Biotin
  • Biotin-responsive metabolic disorders
  • Biotinidase deficiency
  • Deficiency
  • Motor neuron impairment
  • Multiple carboxylase
  • Somatosensory impairment
  • Transgenic knockout model

ASJC Scopus subject areas

  • Neurology

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