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Pascual-Alonso, A.* ; Xiol, C.* ; Smirnov, D. ; Kopajtich, R. ; Prokisch, H. ; Armstrong, J.*

Identification of molecular signatures and pathways involved in Rett syndrome using a multi-omics approach.

Hum. Genomics 17:85 (2023)
Verlagsversion DOI PMC
Open Access Gold
Creative Commons Lizenzvertrag
Background: Rett syndrome (RTT) is a neurodevelopmental disorder mainly caused by mutations in the methyl-CpG-binding protein 2 gene (MECP2). MeCP2 is a multi-functional protein involved in many cellular processes, but the mechanisms by which its dysfunction causes disease are not fully understood. The duplication of the MECP2 gene causes a distinct disorder called MECP2 duplication syndrome (MDS), highlighting the importance of tightly regulating its dosage for proper cellular function. Additionally, some patients with mutations in genes other than MECP2 exhibit phenotypic similarities with RTT, indicating that these genes may also play a role in similar cellular functions. The purpose of this study was to characterise the molecular alterations in patients with RTT in order to identify potential biomarkers or therapeutic targets for this disorder. Methods: We used a combination of transcriptomics (RNAseq) and proteomics (TMT mass spectrometry) to characterise the expression patterns in fibroblast cell lines from 22 patients with RTT and detected mutation in MECP2, 15 patients with MDS, 12 patients with RTT-like phenotypes and 13 healthy controls. Transcriptomics and proteomics data were used to identify differentially expressed genes at both RNA and protein levels, which were further inspected via enrichment and upstream regulator analyses and compared to find shared features in patients with RTT. Results: We identified molecular alterations in cellular functions and pathways that may contribute to the disease phenotype in patients with RTT, such as deregulated cytoskeletal components, vesicular transport elements, ribosomal subunits and mRNA processing machinery. We also compared RTT expression profiles with those of MDS seeking changes in opposite directions that could lead to the identification of MeCP2 direct targets. Some of the deregulated transcripts and proteins were consistently affected in patients with RTT-like phenotypes, revealing potentially relevant molecular processes in patients with overlapping traits and different genetic aetiology. Conclusions: The integration of data in a multi-omics analysis has helped to interpret the molecular consequences of MECP2 dysfunction, contributing to the characterisation of the molecular landscape in patients with RTT. The comparison with MDS provides knowledge of MeCP2 direct targets, whilst the correlation with RTT-like phenotypes highlights processes potentially contributing to the pathomechanism leading these disorders.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Korrespondenzautor
Schlagwörter Differential Expression ; Mecp2 Duplication Syndrome ; Multi-omics ; Proteomics ; Rett Syndrome ; Rett-like Phenotypes ; Transcriptomics; Finger Protein; Expression; Efficient; Receptor; Genes; Brain
ISSN (print) / ISBN 1473-9542
e-ISSN 1479-7364
Zeitschrift Human genomics
Quellenangaben Band: 17, Heft: 1, Seiten: , Artikelnummer: 85 Supplement: ,
Verlag Stewart
Verlagsort London
Nichtpatentliteratur Publikationen
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Neurogenomics (ING)
Förderungen FPU (Formacion del Profesorado Universitario) doctoral grant from the Spanish Ministry of Science, Innovation and Universities
European Social Fund
Government of Catalonia (Secretaria d'Universitats I Recerca)
Muevete por los que no Pueden
parent association 'Sindrome duplicacion MECP2: Miradas que hablan'
Spanish Ministry of Health (Instituto de Salud Carlos III/FEDER)