Cited by 61Down syndrome and intellectual disability researchGenomic variations and chromosomal abnormalitiesGenetics and Neurodevelopmental Disorders

Integrated Quantitative Transcriptome Maps of Human Trisomy 21 Tissues and Cells

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Pelleri, Maria Chiara, Cattani, Chiara, Vitale, Lorenza, Antonaros, Francesca, Strippoli, Pierluigi, Locatelli, Chiara, Cocchi, Guido, Piovesan, Allison +1 more·2018·Frontiers in Genetics

Abstract

Down syndrome (DS) is due to the presence of an extra full or partial chromosome 21 (Hsa21). The identification of genes contributing to DS pathogenesis could be the key to any rational therapy of the associated intellectual disability. We aim at generating quantitative transcriptome maps in DS integrating all gene expression profile datasets available for any cell type or tissue, to obtain a complete model of the transcriptome in terms of both expression values for each gene and segmental trend of gene expression along each chromosome. We used the TRAM (Transcriptome Mapper) software for this meta-analysis, comparing transcript expression levels and profiles between DS and normal brain, lymphoblastoid cell lines, blood cells, fibroblasts, thymus and induced pluripotent stem cells, respectively. TRAM combined, normalized and integrated datasets from different sources and across diverse experimental platforms. The main output was a linear expression value that may be used as a reference for each of up to 37,181 mapped transcripts analyzed, related to both known genes and expression sequence tag (EST) clusters. An independent example in vitro validation of fibroblast transcriptome map data was performed through “Real-Time” reverse transcription polymerase chain reaction showing an excellent correlation coefficient (r=0.93, p<0.0001) with data obtained in silico. The availability of linear expression values for each gene allowed the testing of the gene dosage hypothesis of the expected 3:2 DS/normal ratio for Hsa21 as well as other human genes in DS, in addition to listing genes differentially expressed with statistical significance. Although a fraction of Hsa21 genes escapes dosage effects, Hsa21 genes are selectively over-expressed in DS samples compared to genes from other chromosomes, reflecting a decisive role in the pathogenesis of the syndrome. Finally, the analysis of chromosomal segments reveals a high prevalence of Hsa21 over-expressed segments over the other genomic regions, suggesting, in particular, a specific region on Hsa21 that appears to be frequently over-expressed (21q22). Our complete datasets are released as a new framework to investigate transcription in DS for individual genes as well as chromosomal segments in different cell types and tissues.

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  1. Sharrocks A. (1994). “The design of primer for PCR,” in PCR Technology—Current Innovations, eds Griffin H. G. Griffin A. M. (Boca Raton, FL: CRC Press), 5– 11.

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Authors
Pelleri, M. C., Cattani, C., Vitale, L., Antonaros, F., Strippoli, P., Locatelli, C., Cocchi, G., Piovesan, A., & Caracausi, M.
Affiliations
  • University of Bologna (IT)
  • IRCCS Azienda Ospedliero-Universitaria di Bologna Policlinico di Sant'Orsola (IT)
Corresponding author
Piovesan, Allison
Venue
Frontiers in Genetics
Published
2018-04-24
Volume
9
Pages
125-125
ISSN
1664-8021 (ISSN-L)
OpenAlex
W2802174253
Cited by
61
References
64
Citations by year
2026: 1 · 2025: 6 · 2024: 7 · 2023: 8 · 2022: 5 · 2021: 14 · 2020: 12 · 2019: 8
FWCI
8.09
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Genetics (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Down syndrome and intellectual disability research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
Down syndrome, transcriptome mapping, gene expression, intellectual disability, fibroblasts, lymphoblastoid cell lines, induced pluripotent stem cells, thymus, brain, blood cells, expressed sequence tags

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