title: FUS immunoreactivity of neuronal and glial intranuclear inclusions in intranuclear inclusion body disease.
abstract: OBJECTIVE
  Recent studies have shown that fused-in-sarcoma (FUS) protein is a component of 'neuronal' intranuclear inclusion bodies (INIBs) in the brains of patients with intranuclear inclusion body disease (INIBD). However, the extent and frequency of FUS-immunoreactive structures in INIBD are uncertain.
  
  
  METHODS
  We immunohistochemically examined the brain, spinal cord and peripheral ganglia from five patients with INIBD and five control subjects, using anti-FUS antibodies.
  
  
  RESULTS
  In controls, the nuclei of both neurones and glial cells were intensely immunolabelled with anti-FUS and neuronal cytoplasm was weakly positive for FUS. In INIBD, neuronal and glial INIBs in the brain and spinal cord were positive for FUS. FUS-positive INIBs were also found in the peripheral ganglia. The proportion of FUS-positive neuronal INIBs relative to the total number of inclusion-bearing neurones ranged from 55.6% to 83.3% (average 73.2%) and that of FUS-positive glial INIBs ranged from 45.9% to 85.7% (average 62.7%). The nucleus and cytoplasm of inclusion-bearing neurones and glial cells showed no FUS immunoreactivity.
  
  
  CONCLUSIONS
  These findings suggest that FUS is incorporated into INIBs in both neurones and glial cells and that loss of normal FUS immunoreactivity may result from reduced protein expression and/or sequestration within inclusions.
authors: Departments of Neuropathology Neuroanatomy, Cell Biology and Histology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan. neuropal@cc.hirosaki-u.ac.jp
authors: F
authors: F
authors: Mori
authors: K
authors: K
authors: Tanji
authors: T
authors: T
authors: Kon
authors: S
authors: S
authors: Odagiri
authors: M
authors: M
authors: Hattori
authors: Y
authors: Y
authors: Hoshikawa
authors: C
authors: C
authors: Kono
authors: K
authors: K
authors: Yasui
authors: S
authors: S
authors: Yokoi
authors: Y
authors: Y
authors: Hasegawa
authors: M
authors: M
authors: Yoshida
authors: K
authors: K
authors: Wakabayashi
mesh_terms: D000368:Aged; D001921:Brain / Q000276:immunology / Q000378:metabolism / Q000473:pathology; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D045586:Intranuclear Inclusion Bodies / Q000276:immunology / Q000378:metabolism* / Q000473:pathology; D008875:Middle Aged; D019636:Neurodegenerative Diseases / Q000276:immunology / Q000378:metabolism* / Q000473:pathology; D009457:Neuroglia / Q000276:immunology / Q000378:metabolism* / Q000473:pathology; D009474:Neurons / Q000276:immunology / Q000378:metabolism* / Q000473:pathology; D034702:RNA-Binding Protein FUS / Q000276:immunology / Q000378:metabolism*; D013116:Spinal Cord / Q000276:immunology / Q000378:metabolism / Q000473:pathology
chemical_list: D034702:RNA-Binding Protein FUS