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ALS-linked SOD1 mutant G85R mediates damage to astrocytes and promotes rapidly progressive disease with SOD1-containing inclusions.

High levels of familial Amyotrophic Lateral Sclerosis (ALS)-linked SOD1 mutants G93A and G37R were previously shown to mediate disease in mice through an acquired toxic property. We report here that even low levels of another mutant, G85R, cause motor neuron disease characterized by an extremely rapid clinical progression, without changes in SOD1 activity. Initial indicators of disease are astrocytic inclusions that stain intensely with SOD1 antibodies and ubiquitin and SOD1-containing aggregates in motor neurons, features common with some cases of SOD1 mutant-mediated ALS. Astrocytic inclusions escalate markedly as disease progresses, concomitant with a decrease in the glial glutamate transporter (GLT-1). Thus, the G85R SOD1 mutant mediates direct damage to astrocytes, which may promote the nearly synchronous degeneration of motor neurons.

Pubmed ID: 9052802


  • Bruijn LI
  • Becher MW
  • Lee MK
  • Anderson KL
  • Jenkins NA
  • Copeland NG
  • Sisodia SS
  • Rothstein JD
  • Borchelt DR
  • Price DL
  • Cleveland DW



Publication Data

February 28, 1997

Associated Grants

  • Agency: NIA NIH HHS, Id: AG 05146
  • Agency: NINDS NIH HHS, Id: NS 10580
  • Agency: NINDS NIH HHS, Id: NS 27036

Mesh Terms

  • ATP-Binding Cassette Transporters
  • Amino Acid Transport System X-AG
  • Amyotrophic Lateral Sclerosis
  • Animals
  • Astrocytes
  • Axons
  • Disease Models, Animal
  • Genes, Dominant
  • Humans
  • Mice
  • Mice, Transgenic
  • Microscopy, Electron
  • Nerve Degeneration
  • Neurons
  • Point Mutation
  • Spinal Cord
  • Superoxide Dismutase
  • Ubiquitins