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dc.contributor.authorKong, Yang
dc.contributor.authorFeng, Zichao
dc.contributor.authorZhang, Yulin
dc.contributor.authorLiu, Xiaofei
dc.contributor.authorMa, Yuan
dc.contributor.authorZhao, Zhimin
dc.contributor.authorHuang, Bin
dc.contributor.authorChen, An-Jing
dc.contributor.authorZhang, Di
dc.contributor.authorThorsen, Frits
dc.contributor.authorWang, Jian
dc.contributor.authorYang, Ning
dc.contributor.authorLi, Xingang
dc.description.abstractBackground: The tumor microenvironment (TME) of human glioblastoma (GBM) exhibits considerable immune cell infiltration, and such cell types have been shown to be widely involved in the development of GBM. Here, weighted correlation network analysis (WGCNA) was performed on publicly available datasets to identify immune-related molecules that may contribute to the progression of GBM and thus be exploited as potential therapeutic targets. Methods: WGCNA was used to identify highly correlated gene clusters in Chinese Glioma Genome Atlas glioma dataset. Immune-related genes in significant modules were subsequently validated in the Cancer Genome Atlas (TCGA) and Rembrandt databases, and impact on GBM development was examined in migration and vascular mimicry assays in vitro and in an orthotopic xenograft model (GL261 luciferase-GFP cells) in mice. Results: WGCNA yielded 14 significant modules, one of which (black) contained genes involved in immune response and extracellular matrix formation. The intersection of these genes with a GO immune-related gene set yielded 47 immune-related genes, five of which exhibited increased expression and association with worse prognosis in GBM. One of these genes, TREM1, was highly expressed in areas of pseudopalisading cells around necrosis and associated with other proteins induced in angiogenesis/hypoxia. In macrophages induced from THP1 cells, TREM1 expression levels were increased under hypoxic conditions and associated with markers of macrophage M2 polarization. TREM1 siRNA knockdown in induced macrophages reduced their ability to promote migration and vascular mimicry in GBM cells in vitro, and treatment of mice with LP-17 peptide, which blocks TREM1, inhibited growth of GL261 orthotopic xenografts. Finally, blocking the cytokine receptor for CSF1 in induced macrophages also impeded their potential to promote tumor migration and vascular mimicry in GBM cells. Conclusions: Our results demonstrated that TREM1 could be used as a novel immunotherapy target for glioma patients.en_US
dc.publisherFrontiers Mediaen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleIdentification of immune-related genes contributing to the development of glioblastoma using weighted gene co-expression network analysisen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.rights.holderCopyright © 2020 Kong, Feng, Zhang, Liu, Ma, Zhao, Huang, Chen, Zhang, Thorsen, Wang, Yang and Li.en_US
dc.source.journalFrontiers in Immunologyen_US
dc.identifier.citationFrontiers in Immunology. 2020, 11, 1281.en_US

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