Abstract
DSCAMs (Down syndrome cell adhesion molecules) are a group of immunoglobulin-like transmembrane proteins that contain fibronectin III domains. The founding member of the family was isolated in a positional cloning study that sought to identify genes located on chromosome 21 at the locus 21q22.2–q22.3 that is implicated in the neurological and cardiac phenotypes associated with Down’s syndrome. In Drosophila, Dscam proteins are involved in neuronal wiring, while in vertebrates, the role of these cell adhesion molecules in neurogenesis, dendritogenesis, axonal outgrowth, synaptogenesis, and synaptic plasticity is only just beginning to be understood. In this chapter, we will review the functions ascribed to the two paralogous proteins found in humans, DSCAM and DSCAML1 (DSCAM-like 1), based on findings in knockout mice. The signaling pathways downstream of DSCAM activation and the role of DSCAM miss-expression in disease will be also discussed, particularly with regard to the intellectual disability in Down’s syndrome.
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Acknowledgments
Thanks to Francisco J. Tejedor for critical reading of the manuscript. This work was supported by grants from the Ministerio de Economía y Competitividad (Instituto de Salud Carlos III, Spain; grant PI110507), the Junta de Andalucía (grant P09-CTS-4610), and the Fondation Jérôme Lejeune (France).
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Montesinos, M.L. (2014). Roles for DSCAM and DSCAML1 in Central Nervous System Development and Disease. In: Berezin, V., Walmod, P. (eds) Cell Adhesion Molecules. Advances in Neurobiology, vol 8. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8090-7_11
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