Differential expression of syntrophins and analysis of alternatively spliced dystrophin transcripts in the mouse brain

The European Journal of Neuroscience
D C GóreckiE A Barnard

Abstract

Expression of syntrophin genes, encoding members of the dystrophin-associated protein complex, was studied in the mouse brain. In the hippocampal formation there is distinctive co-localization of specific syntrophins with certain dystrophin isoforms in neurons, e.g. alpha1-syntrophin with the C-dystrophin in CA regions and beta2-syntrophin with the G-dystrophin in the dentate gyrus. Expression of the alpha1-syntrophin is predominant in CA regions and the olfactory bulb and it is also present in the cerebral cortex and the dentate gyrus. The beta2-syntrophin mRNA is most abundant in the dentate gyrus and is also evident in the pituitary, the cerebral cortex and in Ammon's horn and in traces in the caudate putamen. The choroid plexus was labelled by both alpha1- and beta2-syntrophin-specific probes. The expression of syntrophins in the brain correlates with expression of dystrophins and dystroglycan. There are brain areas such as the cerebral cortex where several different syntrophins and dystrophins are expressed together. Syntrophin expression co-localizes with utrophin in the choroid plexus and caudate putamen. Finally, no syntrophin was detected in the cerebellar Purkinje cells where the specific dystrophin isoform (P-type) i...Continue Reading

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