Article (Scientific journals)
NeuroTransDB: highly curated and structured transcriptomic metadata for neurodegenerative diseases.
Bagewadi, Shweta; Adhikari, Subash; Dhrangadhariya, Anjani et al.
2015In Database: The Journal of Biological Databases and Curation, 2015
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Keywords :
Animals; Data Curation; Databases, Genetic; Disease Models, Animal; Gene Expression Regulation; Humans; Mice; Neurodegenerative Diseases/genetics/metabolism; Rats; Transcriptome
Abstract :
[en] Neurodegenerative diseases are chronic debilitating conditions, characterized by progressive loss of neurons that represent a significant health care burden as the global elderly population continues to grow. Over the past decade, high-throughput technologies such as the Affymetrix GeneChip microarrays have provided new perspectives into the pathomechanisms underlying neurodegeneration. Public transcriptomic data repositories, namely Gene Expression Omnibus and curated ArrayExpress, enable researchers to conduct integrative meta-analysis; increasing the power to detect differentially regulated genes in disease and explore patterns of gene dysregulation across biologically related studies. The reliability of retrospective, large-scale integrative analyses depends on an appropriate combination of related datasets, in turn requiring detailed meta-annotations capturing the experimental setup. In most cases, we observe huge variation in compliance to defined standards for submitted metadata in public databases. Much of the information to complete, or refine meta-annotations are distributed in the associated publications. For example, tissue preparation or comorbidity information is frequently described in an article's supplementary tables. Several value-added databases have employed additional manual efforts to overcome this limitation. However, none of these databases explicate annotations that distinguish human and animal models in neurodegeneration context. Therefore, adopting a more specific disease focus, in combination with dedicated disease ontologies, will better empower the selection of comparable studies with refined annotations to address the research question at hand. In this article, we describe the detailed development of NeuroTransDB, a manually curated database containing metadata annotations for neurodegenerative studies. The database contains more than 20 dimensions of metadata annotations within 31 mouse, 5 rat and 45 human studies, defined in collaboration with domain disease experts. We elucidate the step-by-step guidelines used to critically prioritize studies from public archives and their metadata curation and discuss the key challenges encountered. Curated metadata for Alzheimer's disease gene expression studies are available for download. Database URL: www.scai.fraunhofer.de/NeuroTransDB.html.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Bagewadi, Shweta
Adhikari, Subash
Dhrangadhariya, Anjani
Irin, Afroza Khanam
Ebeling, Christian
Alex Namasivayam, Aishwarya ;  University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB)
Page, Matthew
Hofmann-Apitius, Martin
Senger, Philipp
External co-authors :
yes
Language :
English
Title :
NeuroTransDB: highly curated and structured transcriptomic metadata for neurodegenerative diseases.
Publication date :
2015
Journal title :
Database: The Journal of Biological Databases and Curation
ISSN :
1758-0463
Publisher :
Oxford University Press, United Kingdom
Volume :
2015
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
(c) The Author(s) 2015. Published by Oxford University Press.
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since 24 April 2023

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