Dysregulated ADAM10-Mediated Processing of APP during a Critical Time Window Leads to Synaptic Deficits in Fragile X Syndrome

Emanuela Pasciuto, Tariq Ahmed, Tina Wahle, Fabrizio Gardoni, Laura D'Andrea, Laura Pacini, Sébastien Jacquemont, Flora Tassone, Detlef Balschun, Carlos G. Dotti, Zsuzsanna Callaerts-Vegh, Rudi D'Hooge, Ulrike C. Müller, Monica Di Luca, Bart De Strooper, Claudia Bagni

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38 Citations (Scopus)


The Fragile X mental retardation protein (FMRP) regulates neuronal RNA metabolism, and its absence or mutations leads to the Fragile X syndrome (FXS). The β-amyloid precursor protein (APP) is involved in Alzheimer's disease, plays a role in synapse formation, and is upregulated in intellectual disabilities. Here, we show that during mouse synaptogenesis and in human FXS fibroblasts, a dual dysregulation of APP and the α-secretase ADAM10 leads to the production of an excess of soluble APPα (sAPPα). In FXS, sAPPα signals through the metabotropic receptor that, activating the MAP kinase pathway, leads to synaptic and behavioral deficits. Modulation of ADAM10 activity in FXS reduces sAPPα levels, restoring translational control, synaptic morphology, and behavioral plasticity. Thus, proper control of ADAM10-mediated APP processing during a specific developmental postnatal stage is crucial for healthy spine formation and function(s). Downregulation of ADAM10 activity at synapses may be an effective strategy for ameliorating FXS phenotypes. Pasciuto etal. show that dual dysregulation of APP and ADAM10, during a critical period of postnatal development, leads to overproduction of sAPPα. Modulation of ADAM10 activity re-establishes physiological sAPPα levels and ultimately ameliorates FXS molecular, synaptic, and behavioral deficits.

Original languageEnglish
Pages (from-to)382-399
Number of pages18
Issue number2
Publication statusPublished - 15 Jul 2015
Externally publishedYes


ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Pasciuto, E., Ahmed, T., Wahle, T., Gardoni, F., D'Andrea, L., Pacini, L., Jacquemont, S., Tassone, F., Balschun, D., Dotti, C. G., Callaerts-Vegh, Z., D'Hooge, R., Müller, U. C., Di Luca, M., De Strooper, B., & Bagni, C. (2015). Dysregulated ADAM10-Mediated Processing of APP during a Critical Time Window Leads to Synaptic Deficits in Fragile X Syndrome. Neuron, 87(2), 382-399. https://doi.org/10.1016/j.neuron.2015.06.032