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We have previously reported hippocampal mTOR (mammalian target of rapamycin) hyperactivation, and related plasticity as well as memory deficits in Ts1Cje mice, a DS experimental model. Here we characterize the proteome of hippocampal synaptoneurosomes (SNs) from these mice, and found a predicted alteration of synaptic plasticity pathways, including long term depression (LTD). Accordingly, mGluR-LTD (metabotropic Glutamate Receptor-LTD) is enhanced in the hippocampus of Ts1Cje mice and this is correlated with an increased proportion of a particular category of mushroom spines in hippocampal pyramidal neurons. Remarkably, prenatal treatment of these mice with rapamycin has a positive pharmacological effect on both phenotypes, supporting the therapeutic potential of rapamycin\/rapalogs for DS intellectual disability.<\/jats:p>","DOI":"10.1186\/s13041-021-00795-6","type":"journal-article","created":{"date-parts":[[2021,5,25]],"date-time":"2021-05-25T08:03:14Z","timestamp":1621929794000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Prenatal treatment with rapamycin restores enhanced hippocampal mGluR-LTD and mushroom spine size in a Down\u2019s syndrome mouse model"],"prefix":"10.1186","volume":"14","author":[{"given":"Jes\u00fas David","family":"Urbano-G\u00e1mez","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juan Jos\u00e9","family":"Casa\u00f1as","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Itziar","family":"Benito","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3525-5874","authenticated-orcid":false,"given":"Mar\u00eda Luz","family":"Montesinos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,5,25]]},"reference":[{"key":"795_CR1","doi-asserted-by":"publisher","first-page":"75","DOI":"10.1111\/1467-8624.00522","volume":"74","author":"BF Pennington","year":"2003","unstructured":"Pennington BF, Moon J, Edgin J, Stedron J, Nadel L. 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