4.6 Article

Molecular Correlates of Hemorrhage and Edema Volumes Following Human Intracerebral Hemorrhage Implicate Inflammation, Autophagy, mRNA Splicing, and T Cell Receptor Signaling

期刊

TRANSLATIONAL STROKE RESEARCH
卷 12, 期 5, 页码 754-777

出版社

SPRINGER
DOI: 10.1007/s12975-020-00869-y

关键词

Intracerebral hemorrhage volume; Perihematomal edema volume; Inflammation; Volume; Hematoma clearance; Gene expression

资金

  1. NIH (National Institutes of Health) NINDS (National Institute of Neurological Disorders and Stroke) R01 [NS106950, NS075035, NS097000, NS101718]
  2. American Heart Association [16BGIA27250263]

向作者/读者索取更多资源

This study identified peripheral blood genes and pathways associated with ICH and PHE volumes in human ICH patients. The inflammatory pathways, immune system genes, and hub genes enriched in neutrophil and T cell-specific genes may represent potential therapeutic targets for ICH outcomes.
Intracerebral hemorrhage (ICH) and perihematomal edema (PHE) volumes are major determinants of ICH outcomes as is the immune system which plays a significant role in damage and repair. Thus, we performed whole-transcriptome analyses of 18 ICH patients to delineate peripheral blood genes and networks associated with ICH volume, absolute perihematomal edema (aPHE) volume, and relative PHE (aPHE/ICH; rPHE). We found 440, 266, and 391 genes correlated with ICH and aPHE volumes and rPHE, respectively (p < 0.005, partial-correlation > |0.6|). These mainly represented inflammatory pathways including NF-kappa B, TREM1, and Neuroinflammation Signaling-most activated with larger volumes. Weighted Gene Co-Expression Network Analysis identified seven modules significantly correlated with these measures (p < 0.05). Most modules were enriched in neutrophil, monocyte, erythroblast, and/or T cell-specific genes. Autophagy, apoptosis, HIF-1 alpha, inflammatory and neuroinflammatory response (including Toll-like receptors), cell adhesion (including MMP9), platelet activation, T cell receptor signaling, and mRNA splicing were represented in these modules (FDR p < 0.05). Module hub genes, potential master regulators, were enriched in neutrophil-specific genes in three modules. Hub genes included NCF2, NCF4, STX3, and CSF3R, and involved immune response, autophagy, and neutrophil chemotaxis. One module that correlated negatively with ICH volume correlated positively with rPHE. Its genes and hubs were enriched in T cell-specific genes including hubs LCK and ITK, Src family tyrosine kinases whose modulation improved outcomes and reduced BBB dysfunction following experimental ICH. This study uncovers molecular underpinnings associated with ICH and PHE volumes and pathophysiology in human ICH, where knowledge is scarce. The identified pathways and hub genes may represent novel therapeutic targets.

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