A mutation in dynein rescues axonal transport defects and extends the life span of ALS mice.
J Cell Biol
; 169(4): 561-7, 2005 May 23.
Article
en En
| MEDLINE
| ID: mdl-15911875
ABSTRACT
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative condition characterized by motoneuron degeneration and muscle paralysis. Although the precise pathogenesis of ALS remains unclear, mutations in Cu/Zn superoxide dismutase (SOD1) account for approximately 20-25% of familial ALS cases, and transgenic mice overexpressing human mutant SOD1 develop an ALS-like phenotype. Evidence suggests that defects in axonal transport play an important role in neurodegeneration. In Legs at odd angles (Loa) mice, mutations in the motor protein dynein are associated with axonal transport defects and motoneuron degeneration. Here, we show that retrograde axonal transport defects are already present in motoneurons of SOD1(G93A) mice during embryonic development. Surprisingly, crossing SOD1(G93A) mice with Loa/+ mice delays disease progression and significantly increases life span in Loa/SOD1(G93A) mice. Moreover, there is a complete recovery in axonal transport deficits in motoneurons of these mice, which may be responsible for the amelioration of disease. We propose that impaired axonal transport is a prime cause of neuronal death in neurodegenerative disorders such as ALS.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Transporte Axonal
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Dineínas
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Esclerosis Amiotrófica Lateral
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Mutación
Límite:
Animals
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Female
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Humans
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Male
Idioma:
En
Revista:
J Cell Biol
Año:
2005
Tipo del documento:
Article
País de afiliación:
Reino Unido