English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Vascular anomalies, including thrombosis, are a hallmark of glioblastoma (GBM) and an aftermath of dysregulated cancer cell genome and epigenome. Upregulation of podoplanin (PDPN) by cancer cells has recently been linked to an increased risk of venous thromboembolism in glioblastoma patients. Thus, regulation of this platelet activating transmembrane protein by transforming events and release from cancer cells into the circulation are of considerable interest. We took advantage of single-cell and bulk GBM transcriptome dataset mining and investigated the pattern of PDPN expression across several databases. Our analysis indicated that PDPN is expressed by distinct (mesenchymal) glioblastoma cell subpopulations and is downregulated by oncogenic mutations of EGFR and IDH1 genes, via changes in chromatin modifications (EZH2) and DNA methylation, respectively. Additionally, we utilized isogenic and stem GBM cell lines, xenograft models in mice, ELISA assays for PDPN, tissue factor (TF), platelet factor 4 (PF4) and clotting activation markers (D-dimer), and multicolor nano-flow cytometry to show that GBM cells exteriorize PDPN and/or TF as cargo of exosome-like coagulant extracellular vesicles EVs. We also documented an increase of platelet activation (PF4) or coagulation markers (D-dimer) in mice harboring the corresponding PDPN- or TF-expressing glioma xenografts, respectively. While PDPN was a dominant regulator of systemic platelet activation, co-expression of PDPN and TF impacted local microthrombosis. Our work suggests that distinct cellular subsets drive multiple facets of GBM-associated thrombosis and may represent targets for diagnosis and intervention.

OPTC-5. Molecular signatures of podoplanin expressing glioblastoma cell subsets with putative role in cancer associated thrombosis and microthrombosis