ArticleIET systems biology
Machine Learning-Based Integrative Analysis Identifies SUMOylation-Related Genes Underlying the Immune Heterogeneity of Sepsis.
Article in IET systems biology. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
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9 authors.
Funding
Abstract
Sepsis heterogeneity poses a challenge to accurate diagnosis and treatment. The impact of SUMOylation, a post-translational modification, on sepsis is largely unexplored. We integrated three GEO datasets to construct a large-scale sepsis cohort and applied three machine learning algorithms to screen hub genes from differentially expressed genes (DEGs) associated with SUMOylation in sepsis. Unsupervised consensus clustering was performed to identify sepsis subtypes. Using single-sample gene set enrichment analysis (ssGSEA) and gene set variation analysis (GSVA), we analysed the immunological and functional features of these subtypes. We assembled the regulatory network of hub genes and performed drug prediction analysis. The expression of hub genes was confirmed in a murine caecal ligation and puncture (CLP) sepsis model through qRT-PCR. Bioinformatics analysis identified a total of 43 SUMOylation-associated DEGs. The machine learning pipeline further pinpointed eight hub genes: TOP2B, HDAC4, NUP43, HNRNPK, BCL11A, RPA1, RORA and XRCC4. Each gene exhibited high diagnostic potential. Based on this eight-gene signature, sepsis patients were stratified into two subtypes. Subtype A, known as immune suppressive, was characterised by high infiltration of regulatory T cells, along with suppressed activity in immune pathways. The hyper-inflammatory subtype B displayed large infiltration of effector lymphocytes and extensive activation of inflammatory pathways. Drug prediction analysis revealed possible therapeutic compounds, particularly the epigenetic modulator vorinostat. Experimental validation ultimately confirmed the dysregulation of these hub genes. In conclusion, our study discovered a novel eight-gene signature associated with SUMOylation that supports new diagnostic strategies, and uncovers sepsis heterogeneity. The identification of two sepsis subtypes with different immunological and functional characteristics emphasises the role of SUMOylation in sepsis pathophysiology and provides a new strategy for advancing precision diagnostics and personalised therapy.
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