Hindlimb motor neurons require Cu/Zn superoxide dismutase for maintenance of neuromuscular junctions.
Am J Pathol
; 155(2): 663-72, 1999 Aug.
Article
de En
| MEDLINE
| ID: mdl-10433959
ABSTRACT
The role of oxidative damage in neurodegenerative disease was investigated in mice lacking cytoplasmic Cu/Zn superoxide dismutase (SOD), created by deletion of the SOD1 gene (SOD1(-/-)). SOD1(-/-) mice developed a chronic peripheral hindlimb axonopathy. Mild denervation of muscle was detected at 2 months, and behavioral and physiological motor deficits were present at 5-7 months of age. Ventral root axons were shrunken but were normal in number. The somatosensory system in SOD1(-/-) mice was mildly affected. SOD1(-/-) mice expressing Cu/Zn SOD only in brain and spinal cord were generated using transgenic mice expressing mouse SOD1 driven by the neuron-specific synapsin promoter. Neuron-specific expression of Cu/Zn SOD in SOD1(-/-) mice rescued motor neurons from the neuropathy. Therefore, Cu/Zn SOD is not required for normal motor neuron survival, but is necessary for the maintenance of normal neuromuscular junctions by hindlimb motor neurons.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Superoxide dismutase
/
Zinc
/
Cuivre
/
Membre pelvien
/
Motoneurones
/
Jonction neuromusculaire
Type d'étude:
Prognostic_studies
Limites:
Animals
Langue:
En
Journal:
Am J Pathol
Année:
1999
Type de document:
Article
Pays d'affiliation:
États-Unis d'Amérique