Widespread occurrence of intranuclear atrophin-1 accumulation in the central nervous system neurons of patients with dentatorubral-pallidoluysian atrophy

Mitsunori Yamada, Jonathan D. Wood, Takayoshi Shimohata, Shintaro Hayashi, Shoji Tsuji, Christopher A. Ross, Hitoshi Takahashi

Research output: Contribution to journalArticle

Abstract

Dentatorubral-pallidoluyslan atrophy (DRPLA) is an autosomal dominant neurodegenerative disorder caused by a CAG repeat expansion. In the present study of DRPLA, we have demonstrated immunohistochemically that diffuse accumulation of mutant atrophin-1 in the neuronal nuclei, rather than the formation of neuronal intranuclear inclusions (NIIs), was the predominant pathologic condition and involved a wide range of central nervous system regions far beyond the systems previously reported to be affected. In the neuronal nuclei harboring NIIs, promyelocytic leukemia protein (PML) nuclear bodies were redistributed into a single NII, and the CREB (cAMP-responsive element-binding protein)-binding protein was also recruited into NIIs. The results suggest that the novel lesion distribution revealed by the diffuse nuclear labeling may be responsible for a variety of clinical features, such as dementia and epilepsy in DRPLA, and that certain transcriptional abnormalities may be induced secondarily in neuronal nuclei with the formation of NIIs.

Original languageEnglish (US)
Pages (from-to)14-23
Number of pages10
JournalAnnals of neurology
Volume49
Issue number1
DOIs
StatePublished - Feb 28 2001

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ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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