1.Master genes and co-expression network analysis in peripheral blood mononuclear cells of patients with gram-positive and gram-negative sepsis.
Lu LI ; Junjun FANG ; Zhitao LI ; Leixing SHEN ; Guobin WANG ; Shuiqiao FU
Journal of Zhejiang University. Medical sciences 2020;49(6):732-742
OBJECTIVE:
To investigate the functional pathways enriched and differentially expressed genes (DEGs) in peripheral blood mononuclear cells (PBMCs) of patients with gram-positive and gram-negative sepsis.
METHODS:
Dataset GSE9960 obtained from NCBI GEO database containing PBMC samples from 16 non-infectious systematic inflammatory response syndrome (SIRS) patients, 17 gram-positive septic patients and 18 gram-negative septic patients were included in the study. Functional pathway annotations were conducted by gene set enrichment analysis and weighted gene co-expression network analysis. DEGs were filtered and master DEGs were then validated in PBMCs of gram-positive septic, gram-negative septic and non-infectious SIRS patients.
RESULTS:
The enriched gene sets in gram-positive sepsis and gram-negative sepsis were significantly different. The results indicated the opposite co-expression networks in SIRS and gram-negative sepsis, and the entirely different co-expression networks in gram-positive and gram-negative sepsis. Furthermore, we validated that
CONCLUSIONS
The results indicate that there are differences in the mechanism and pathogenesis of gram-positive and gram-negative sepsis, which may provide potential markers for sepsis diagnosis and empirical antimicrobial therapy.
Biomarkers/analysis*
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Gene Expression Profiling
;
Gram-Negative Bacterial Infections/physiopathology*
;
Gram-Positive Bacterial Infections/physiopathology*
;
Humans
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Leukocytes, Mononuclear/pathology*
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Sepsis/physiopathology*