Abstract
Dystrophin, the protein encoded by the Duchenne muscular dystrophy gene has been shown to be expressed in central nervous system. In the present study, polyclonal antibodies raised against 3 fusion proteins constructed from different structural domains of dystrophin were used to identify dystrophin in protein extracts from rat and mdx mouse brain. The developmental expression of the protein, its regional distribution in rat brain and its localization in rat brain subcellular fractions were also examined. We found that dystrophin or a ‘dystrophin-related protein’ is expressed in mdx mouse brain. Dystrophin is detectable at very early stages of rat brain development and is expressed in all adult brain regions examined, although quantitative regional differences were found. Subcellular distribution analysis indicates that dystrophin is absent in mitochondrial and synaptic vesicle-enriched fractions but is recovered in the synaptic plasma membrane fraction.
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