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Toxicity of familial ALS-linked SOD1 mutants from selective recruitment to spinal mitochondria
- Liu, Jian (author)
- Lillo, Concepcián (author)
-
- Jonsson, Andreas P. (author)
- Umeå universitet,Institutionen för medicinsk biovetenskap
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- Vande Velde, Christine (author)
- Ward, Christopher M (author)
- Miller, Timothy M (author)
- Subramaniam, Jamuna R (author)
- Rothstein, Jeffery D (author)
- Gredal, Ole (author)
- Wong, Philip C (author)
- Williams, David S (author)
- Cleveland, Don W (author)
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- (creator_code:org_t)
- Cell Press, 2004
- 2004
- English.
- In: Neuron. - : Cell Press. - 0896-6273 .- 1097-4199. ; 43:1, s. 5-17
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- One cause of amyotrophic lateral sclerosis (ALS) is mutation in ubiquitously expressed copper/zinc superoxide dismutase (SOD1), but the mechanism of toxicity to motor neurons is unknown. Multiple disease-causing mutants, but not wild-type SOD1, are now demonstrated to be recruited to mitochondria, but only in affected tissues. This is independent of the copper chaperone for SOD1 and dismutase activity. Highly preferential association with spinal cord mitochondria is seen in human ALS for a mutant SOD1 that accumulates only to trace cytoplasmic levels. Despite variable proportions that are successfully imported, nearly constant amounts of SOD1 mutants and covalently damaged adducts of them accumulate as apparent import intermediates and/or are tightly aggregated or crosslinked onto integral membrane components on the cytoplasmic face of those mitochondria. These findings implicate damage from action of spinal cord-specific factors that recruit mutant SOD1 to spinal mitochondria as the basis for their selective toxicity in ALS.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Neurovetenskaper (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Neurosciences (hsv//eng)
Keyword
- Aging/metabolism
- Animals
- Cytoplasm/metabolism
- Disease Models
- Animal
- Humans
- Intracellular Membranes/enzymology/pathology/ultrastructure
- Macromolecular Substances
- Mice
- Mice
- Transgenic
- Microscopy
- Electron
- Mitochondria/*enzymology/genetics/pathology
- Mitochondrial Proteins/metabolism
- Molecular Chaperones/metabolism
- Motor Neuron Disease/*enzymology/genetics/pathology
- Mutation/genetics
- Nerve Degeneration/*enzymology/genetics/physiopathology
- Protein Binding/genetics
- Protein Folding
- Protein Isoforms/genetics/metabolism
- Protein Transport/genetics
- Spinal Cord/chemistry/*enzymology/pathology
- Superoxide Dismutase/genetics/*metabolism/*toxicity
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Neuron
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