DYSF and muscular dystrophy: In the present study, however, we showed that although (dysferlinsjl/+: fukutinHp/−) mice did not exhibit a muscular dystrophy phenotype, (dysferlinsjl/sjl: fukutinHp/−) mice developed a more exacerbated phenotype than did the dysferlin single-mutant (dysferlinsjl/sjl: fukutinHp/+) mice.