Constitutive muscular abnormalities in culture in spinal muscular atrophy.
basic_science · Level V
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Abstract
To explore the cause of spinal muscular atrophy (SMA), we used an in-vitro model of nerve-muscle co-cultures in which motoneurons were normal and satellite cells were obtained from SMA patients. In co-cultures initiated with satellite cells from type I and type II SMA patients only, we observed degeneration of the innervated fibres after 1-3 weeks of nerve-muscle co-culture. This process involved vacuolisation, disorganisation, and death of the innervated muscle fibres. This observation points to a muscular implication in the severe forms of SMAs.