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Issue title: Special Issue Dedicated to Professor Terence Partridge
Guest editors: Jyoti Jaiswal and Kanneboyina Nagaraju
Article type: Research Article
Authors: Morgan, Stephena | Malatras, Apostolosb | Duguez, Stephaniea | Duddy, Williama; *
Affiliations: [a] Northern Ireland Centre for Stratified Medicine, Altnagelvin Hospital Campus, Ulster University, Londonderry, Northern Ireland, UK | [b] Department of Biological Sciences, Molecular Medicine Research Center, University of Cyprus, University Avenue, Nicosia, Cyprus
Correspondence: [*] Correspondence to: William J. Duddy PhD FHEA, Northern Ireland Center for Stratified Medicine, Biomedical Sciences Research Institute, C-TRIC, Altnagelvin Hospital Campus, Glenshane Road, Derry/Londonderry, BT47 6SB, UK. Tel.: +44 28 71 675 686; E-mail: w.duddy@ulster.ac.uk.
Abstract: Background:Molecular interaction networks (MINs) aim to capture the complex relationships between interacting molecules within a biological system. MINs can be constructed from existing knowledge of molecular functional associations, such as protein-protein binding interactions (PPI) or gene co-expression, and these different sources may be combined into a single MIN. A given MIN may be more or less optimal in its representation of the important functional relationships of molecules in a tissue. Objective:The aim of this study was to establish whether a combined MIN derived from different types of functional association could better capture muscle-relevant biology compared to its constituent single-source MINs. Methods:MINs were constructed from functional association databases for both protein-binding and gene co-expression. The networks were then compared based on the capture of muscle-relevant genes and gene ontology (GO) terms, tested in two different ways using established biological network clustering algorithms. The top performing MINs were combined to test whether an optimal MIN for skeletal muscle could be constructed. Results:The STRING PPI network was the best performing single-source MIN among those tested. Combining STRING with interactions from either the MyoMiner or CoXPRESSdb gene co-expression sources resulted in a combined network with improved performance relative to its constituent networks. Conclusion:MINs constructed from multiple types of functional association can better represent the functional relationships of molecules in a given tissue. Such networks may be used to improve the analysis and interpretation of functional genomics data in the study of skeletal muscle and neuromuscular diseases. Networks and clusters described by this study, including the combinations of STRING with MyoMiner or with CoXPRESSdb, are available for download from https://www.sys-myo.com/myominer/download.php.
Keywords: Skeletal muscle, neuromuscular disease, molecular interaction networks, network medicine, functional genomics, protein-protein interactions, gene co-expression
DOI: 10.3233/JND-210680
Journal: Journal of Neuromuscular Diseases, vol. 8, no. s2, pp. S223-S239, 2021
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