Mutations of SPG4 are responsible for a loss of function of spastin, an abundant neuronal protein localized in the nucleus.
Hum Mol Genet
; 12(1): 71-8, 2003 Jan 01.
Article
en En
| MEDLINE
| ID: mdl-12490534
ABSTRACT
Mutations of spastin are responsible for the most common autosomal dominant form of hereditary spastic paraplegia (AD-HSP), a disease characterized by axonal degeneration of corticospinal tracts and posterior columns. Generation of polyclonal antibodies specific to spastin has revealed two isoforms of 75 and 80 kDa in both human and mouse tissues with a tissue-specific variability of the isoform ratio. Spastin is an abundant protein in neural tissues and immunolabeling experiments have shown that spastin is expressed in neurons but not in glial cells. These data indicate that axonal degeneration linked to spastin mutations is caused by a primary defect of neurons. Protein and transcript analyses of patients carrying either nonsense or frameshift spastin mutations revealed neither truncated protein nor mutated transcripts, providing evidence that these mutations are responsible for a loss of spastin function. Identifying agents able to induce the expression of the non-mutated spastin allele should represent an attractive therapeutic strategy in this disease.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Proteínas de Unión al Calcio
/
Paraplejía Espástica Hereditaria
/
Núcleo Celular
/
Adenosina Trifosfatasas
/
Mutación
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Hum Mol Genet
Asunto de la revista:
BIOLOGIA MOLECULAR
/
GENETICA MEDICA
Año:
2003
Tipo del documento:
Article
País de afiliación:
Francia