Network inference with Granger causality ensembles on single-cell transcriptomics.

Network inference with Granger causality ensembles on single-cell transcriptomics.
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DOI:
10.1016/j.celrep.2022.110333
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发表时间:
2022-02-08
期刊:
影响因子:
8.8
通讯作者:
Gitter, Anthony
Gitter, Anthony
中科院分区:
生物学1区
文献类型:
--
作者:
Deshpande, Atul;Chu, Li-Fang;Stewart, Ron;Gitter, Anthony

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Cellular gene expression changes throughout a dynamic biological process, such as differentiation. Pseudotimes estimate cells’ progress along a dynamic process based on their individual gene expression states. Ordering the expression data by pseudotime provides information about the underlying regulator-gene interactions. Because the pseudotime distribution is not uniform, many standard mathematical methods are inapplicable for analyzing the ordered gene expression states. Here we present single-cell inference of networks using Granger ensembles (SINGE), an algorithm for gene regulatory network inference from ordered single-cell gene expression data. SINGE uses kernel-based Granger causality regression to smooth irregular pseudotimes and missing expression values. It aggregates predictions from an ensemble of regression analyses to compile a ranked list of candidate interactions between transcriptional regulators and target genes. In two mouse embryonic stem cell differentiation datasets, SINGE outperforms other contemporary algorithms. However, a more detailed examination reveals caveats about poor performance for individual regulators and uninformative pseudotimes. Deshpande et al. present SINGE, an algorithm to infer gene regulatory networks from ordered single-cell gene expression data. SINGE uses kernel-based regression to smooth noisy, ordered single-cell data and ensembling to prioritize reliable regulatory relationships.
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