Multi-omics network reconstruction with collaborative graphical lasso

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ID: 320812
2026
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Abstract
Abstract Motivation In recent years, the availability of multi-omics data has increased substantially. Multi-omics data integration methods mainly aim to leverage different molecular layers to gain a complete molecular description of biological processes. An attractive integration approach is the reconstruction of multi-omics networks. However, the development of effective multi-omics network reconstruction strategies lags behind. Results In this study, we introduce collaborative graphical lasso, a novel approach that extends graphical lasso by incorporating collaboration between omics layers, thereby improving multi-omics data integration and enhancing network inference. Our method leverages a collaborative penalty term, which harmonizes the contribution of the omics layers to the reconstruction of the network structure. This promotes a cohesive integration of information across modalities, and it is introduced alongside a dual regularization scheme that separately controls sparsity within and between layers. To address the challenge of model selection in this framework, we propose XStARS, a stability-based criterion for multi-dimensional hyperparameter tuning. We assess the performance of collaborative graphical lasso and the corresponding model selection procedure through simulations, and we apply them to publicly available multi-omics data. This application demonstrated collaborative graphical lasso recovers established biological interactions while suggesting novel, biologically coherent connections. Availability and implementation We implemented collaborative graphical lasso as an R package, available on CRAN as coglasso. The results of the manuscript can be reproduced running the code available at https://github.com/DrQuestion/coglasso_reproducible_code, deposited on figshare with DOI: https://doi.org/10.6084/m9.figshare.32324376. Supplementary information Supplementary data are available at Bioinformatics online.
Reference Key
openalex_W7168187707 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Alessio Albanese, Wouter Kohlen, Pariya Behrouzi
Journal BMC Bioinformatics
Year 2026
DOI
10.1093/bioinformatics/btag477
URL
Keywords Keywords not found

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