Characterization of the expression of dystrophins and dystrophin-associated proteins during embryonic neural stem/progenitor cell differentiation.

Neuroscience Letters
José Romo-YáñezCecilia Montañez

Abstract

Duchenne muscular dystrophy (DMD) is a genetic disease caused by mutations in the dystrophin gene. Dystrophin is required for the organization of a complex consisting of dystroglycans, sarcoglycans, dystrobrevins and syntrophins, known as the dystrophin-associated proteins complex (DAPC). In addition to muscle degeneration, cognitive impairment has been reported in DMD patients. To characterize a suitable model for studying the embryonic cerebral functions of dystrophin, we analyzed the expression patterns of dystrophins/DAPC in undifferentiated and differentiated embryonic neural stem/progenitor cells (NSPC). We found that NSPC express mRNAs for dystrophins Dp427, Dp140, Dp71 and Dp40; β-dystroglycan; α- and β-dystrobrevin; α1-, β1-, β2- and γ2-syntrophin; and β-, γ-, δ- and ε-sarcoglycan. Some of these were differentially regulated during neuronal or astrocytic differentiation. Interestingly, the protein expression levels of Dp140, β-dystroglycan and α2-dystrobrevin were also differentially regulated. Additionally, we found that proliferating NSPC and differentiated neurons and astrocytes show immuno-positive staining for dystrophins and β-dystroglycan. Our results show that dystrophins and DAPC components are expressed and r...Continue Reading

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