Single Administration of Antisense Oligomer Delivered to the CNS Rescues a Severe Mouse Model of Spinal Muscular Atrophy
FSMA News | December 22, 2011
The Burghes laboratory at Ohio State University publishes a paper in Human Molecular Genetics showing a single dose of an antisense oligomer (ASO) can greatly benefit survival, weight gain, and motor function in severe mouse model of SMA.
In this study, the authors delivered a bolus ICV injection of anti-sense oligonucleotide (ASO) of morpholino chemistry to alter SMN2 splicing and increase SMN levels. Treated SMA mice had improvement in weight gain, motor activity, and increased survival from 15 days to over 100 days. Delayed CNS delivery (P4) had an intermediate advantage, evidence that earlier CNS treatment yields more robust effects, while delayed peripheral delivery after blood-brain-barrier maturation had only modest increased survival. This suggests that CNS delivery of SMN is key to therapeutic benefit in this SMA mouse model.
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