Neuronal Apoptosis-Inhibitory ProteinSpinal Muscular Atrophies of ChildhoodMuscular Atrophy, SpinalSMN Complex ProteinsSurvival of Motor Neuron 1 ProteinNerve Tissue ProteinsGene DeletionApoptosisCyclic AMP Response Element-Binding ProteinCaspasesCaspase 3CASP8 and FADD-Like Apoptosis Regulating ProteinNeuronsApoptosis Regulatory ProteinsIn Situ Nick-End LabelingProto-Oncogene Proteins c-bcl-2Cells, CulturedSignal TransductionInhibitor of Apoptosis Proteinsbcl-2-Associated X Protein