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<p>Sepsis is a systemic inflammatory response syndrome caused by infection, which has a high morbidity and mortality. Short-chain fatty acids (SCFAs) have been proved to improve the outcome of sepsis by regulating immunity and metabolism, but its specific mechanism is not clear. This study employed a multi-omics strategy integrating murine models, untargeted metabolomics, human transcriptomics (GSE185263, GSE54514), single-cell RNA sequencing (GSE167363), and Mendelian randomization to investigate SCFAs’ role in sepsis. Cecal ligation and puncture (CLP) was performed in C57BL/6 mice (n = 60). Transcriptomic analysis identified 76 differentially expressed genes between septic and healthy subjects. Machine learning (SVM-RFE and LASSO regression) prioritized five SCFA-associated hub genes (CASP5, GPR84, MMP9, MPO, PRTN3), with molecular docking revealing two potential modulators. Single-cell profiling localized these targets to monocytes, while immune infiltration analysis confirmed SCFA-mediated immunomodulation. Murine metabolomics identified glycerophospholipid (GPL) metabolism as the most significantly altered pathway under SCFAs intervention. Mendelian randomization established causal relationships between GPL pathway genes and sepsis incidence/28-day mortality. Collectively, the study provide novel mechanistic and translational insights into the therapeutic targeting of short-chain fatty acids in sepsis.</p>

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Comprehensive multi-omics analysis reveals the core role of glycerophospholipid metabolism in the influence of short-chain fatty acids on the development of sepsis

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月9日

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  • Yunfen Tian,
  • Meisha Sun,
  • Lan Luo,
  • Fen Lou,
  • Peng Zhou,
  • Jiejuan Chen,
  • Hongdan Lv,
  • Fangxiang Zhang,
  • Mazhong Zhang,
  • Bin Wang

摘要

Sepsis is a systemic inflammatory response syndrome caused by infection, which has a high morbidity and mortality. Short-chain fatty acids (SCFAs) have been proved to improve the outcome of sepsis by regulating immunity and metabolism, but its specific mechanism is not clear. This study employed a multi-omics strategy integrating murine models, untargeted metabolomics, human transcriptomics (GSE185263, GSE54514), single-cell RNA sequencing (GSE167363), and Mendelian randomization to investigate SCFAs’ role in sepsis. Cecal ligation and puncture (CLP) was performed in C57BL/6 mice (n = 60). Transcriptomic analysis identified 76 differentially expressed genes between septic and healthy subjects. Machine learning (SVM-RFE and LASSO regression) prioritized five SCFA-associated hub genes (CASP5, GPR84, MMP9, MPO, PRTN3), with molecular docking revealing two potential modulators. Single-cell profiling localized these targets to monocytes, while immune infiltration analysis confirmed SCFA-mediated immunomodulation. Murine metabolomics identified glycerophospholipid (GPL) metabolism as the most significantly altered pathway under SCFAs intervention. Mendelian randomization established causal relationships between GPL pathway genes and sepsis incidence/28-day mortality. Collectively, the study provide novel mechanistic and translational insights into the therapeutic targeting of short-chain fatty acids in sepsis.