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Publication Detail
Neuropathology of Beta-propeller protein associated neurodegeneration (BPAN): a new tauopathy
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Paudel R, Li A, Wiethoff S, Bandopadhyay R, Bhatia K, de Silva R, Houlden H, Holton JL
  • Publication date:
    30/06/2015
  • Pagination:
    39, ?
  • Journal:
    Acta neuropathologica communications
  • Volume:
    3
  • Status:
    Published
Abstract
RESULTS: The major pathological findings were observed in the substantia nigra with excess iron deposition, gliosis, axonal swellings and severe neuronal loss. Iron deposition was also observed in the globus pallidus. There was extensive hyperphosphorylated-tau deposition in the form of neurofibrillary tangles, pre-tangles and neuropil threads. Furthermore, histological studies and immunoblotting confirmed a mixed Alzheimer type 3-and 4-repeat tau pathology. Microtubule-associated protein 1A/1B-light chain 3 (LC3) immunoblotting of brain homogenates indicated autophagic activity and may support the role of WDR45 in autophagy. CONCLUSIONS: The widespread Alzheimer-type tau pathology in this disease indicates that this should be considered as a tauopathy and adds further support to the proposal that impaired autophagy may have a role in tauopathies. INTRODUCTION: Beta-propeller protein associated neurodegeneration (BPAN) is associated with mutations in the WD repeat domain 45 (WDR45) gene on chromosome Xp11 resulting in reduced autophagic flux. This study describes the clinical and neuropathological features of a female 51 year old BPAN case. The clinical history includes learning disability and progressive gait abnormalities since childhood followed by progressive dystonic features in young adulthood. Brain imaging revealed generalised brain atrophy and bilateral mineralisation of the globus pallidus and substantia nigra.
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