RNA-Seq Data Mining: Downregulation of NeuroD6 Serves as a Possible Biomarker for Alzheimer’s Disease Brains
Abstract
Alzheimer’s disease (AD) is the most common cause of dementia worldwide with no curative therapies currently available. Previously, global transcriptome analysis of AD brains by microarray failed to identify the set of consistently deregulated genes for biomarker development of AD. Therefore, the molecular pathogenesis of AD remains largely unknown. Whole RNA sequencing (RNA-Seq) is an innovative technology for the comprehensive transcriptome profiling on a genome-wide scale that overcomes several drawbacks of the microarray-based approach. To identify biomarker genes for AD, we analyzed a RNA-Seq dataset composed of the comprehensive transcriptome of autopsized AD brains derived from two independent cohorts. We identified the core set of 522 genes deregulated in AD brains shared between both, compared with normal control subjects. They included downregulation of neuronal differentiation 6 (NeuroD6), a basic helix-loop-helix (bHLH) transcription factor involved in neuronal development, differentiation, and survival in AD brains of both cohorts. We verified the results of RNA-Seq by analyzing three microarray datasets of AD brains different in brain regions, ethnicities, and microarray platforms. Thus, both RNA-Seq and microarray data analysis indicated consistent downregulation of NeuroD6 in AD brains. These results suggested that downregulation of NeuroD6 serves as a possible biomarker for AD brains.
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Intersection of the microglia signature gene list with 46 publicly available data sets for differentially regulated genes in neurodegenerative and behavioral disorders revealed significant enrichment or depletion of microglia signature genes in 28 of the 46 data sets.
“We then intersected this gene list with 46 publicly available data sets for differentially regulated genes in neurodegenerative and behavioral disorders derived from microarray or RNA-seq analysis of intact tissue (39–53). Two-sided Fisher’s exact tests revealed significant enrichment or depletion of microglia signature genes in 28 of the 46 data sets (Table S3).”
From An environment-dependent transcriptional network specifies human microglia identity (2017) · cites this paper as [46]
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- Authors
- Satoh, J.-I., Yamamoto, Y., Asahina, N., Kitano, S., & Kino, Y.
- Affiliations
- Department of Bioinformatics and Molecular Neuropathology, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan
- Venue
- Disease Markers
- Publisher
- Wiley
- Published
- 2014
- Volume
- 2014
- Pages
- 1-10
- ISSN
- 0278-0240
- 1875-8630
- PMC
- PMC4274867
- Cited by
- 46
- References
- 4
- Language
- en
- Funders
- Japan Society for the Promotion of Science (C22500322, C25430054, NCGC26-20)
- National Center for Geriatrics and Gerontology (C22500322, C25430054, NCGC26-20)
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