DAG1 and neuromuscular disease caused by qualitative or quantitative defects of alpha-dystroglycan: Although satellite cell analysis on MDDGA4 human muscles has not been reported, since FUKUTIN contributes to α-DYSTROGLYCAN glycosylation and Fktn levels respond to Pax7 abundance (as does Pomgnt2 (Fig. 5)), supports the hypothesis that satellite cell dysfunction could contribute to most dystroglycanopathies.