Trisomy 21 triggers multiple potential routes to intellectual disability in Down's syndrome. A new study suggests that aberrant endosomal function may contribute to the neuronal deficits behind learning and memory impairments in affected individuals (pages 473–480).
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Jones, M. Sorting receptors at Down's syndrome synapses. Nat Med 19, 404–406 (2013). https://doi.org/10.1038/nm.3152
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DOI: https://doi.org/10.1038/nm.3152