1. Multiscale modeling uncovers 7q11.23 copy number variation-dependent changes in ribosomal biogenesis and neuronal maturation and excitability
- Author
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Mihailovich, Marija, Germain, Pierre-Luc, Shyti, Reinald, Pozzi, Davide, Noberini, Roberta, Liu, Yansheng, Aprile, Davide, Tenderini, Erika, Troglio, Flavia, Trattaro, Sebastiano, Fabris, Sonia, Ciptasari, Ummi, Rigoli, Marco Tullio, Caporale, Nicolo, D'Agostino, Giuseppe, Mirabella, Filippo, Vitriolo, Alessandro, Capocefalo, Daniele, Skaros, Adrianos, Franchini, Agnese Virginia, Ricciardi, Sara, Biunno, Ida, Neri, Antonino, Kasri, Nael Nadif, Bonaldi, Tiziana, Aebersold, Rudolf, Matteoli, Michela, and Testa, Giuseppe
- Subjects
Genetic aspects ,Research ,Risk factors ,Health aspects ,Organelle biogenesis -- Genetic aspects -- Health aspects ,Neurological research ,Copy number variations -- Research ,Nervous system diseases -- Risk factors -- Genetic aspects ,Ribosomes -- Genetic aspects -- Health aspects ,Gene expression -- Research ,Developmental disabilities -- Risk factors -- Genetic aspects ,Neurons -- Genetic aspects -- Health aspects ,Child development deviations -- Risk factors -- Genetic aspects ,Cell organelles -- Formation - Abstract
Introduction With over a thousand associated genes and an increasing number of polygenic risk variants, neurodevelopmental disorders (NDDs), in particular autism spectrum disorder (ASD) and intellectual disability (ID), continue to [...], Copy number variation (CNV) at 7q11.23 causes Williams-Beuren syndrome (WBS) and 7q microduplication syndrome (7Dup), neurodevelopmental disorders (NDDs) featuring intellectual disability accompanied by symmetrically opposite neurocognitive features. Although significant progress has been made in understanding the molecular mechanisms underlying 7q11.23- related pathophysiology, the propagation of CNV dosage across gene expression layers and their interplay remains elusive. Here we uncovered 7q11.23 dosage-dependent symmetrically opposite dynamics in neuronal differentiation and intrinsic excitability. By integrating transcriptomics, translatomics, and proteomics of patient-derived and isogenic induced neurons, we found that genes related to neuronal transmission follow 7q11.23 dosage and are transcriptionally controlled, while translational factors and ribosomal genes are posttranscriptionally buffered. Consistently, we found phosphorylated RPS6 (p-RPS6) downregulated in WBS and upregulated in 7Dup. Surprisingly, p-4EBP was changed in the opposite direction, reflecting dosage- specific changes in total 4EBP levels. This highlights different dosage-sensitive dyregulations of the mTOR pathway as well as distinct roles of p-RPS6 and p-4EBP during neurogenesis. Our work demonstrates the importance of multiscale disease modeling across molecular and functional layers, uncovers the pathophysiological relevance of ribosomal biogenesis in a paradigmatic pair of NDDs, and uncouples the roles of p-RPS6 and p-4EBP as mechanistically actionable relays in NDDs.
- Published
- 2024
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