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A High-Throughput Screen on Primary Glioblastoma-Associated Macrophages Identifies HDAC Inhibitors as Enhancers of Phagocytosis and Potent Partners for Immunotherapy [RNA-seq]

GSE330002 Mus musculus Expression profiling by high throughput sequencing 7 samples Submitted 2026/07/07 Platform GPL24247
Summary
This study presents the first high-throughput chemical screen on primary tumor-associated macrophages (TAMs) freshly isolated from surgical glioblastoma (GBM) patient samples, testing 1,365 compounds to identify drugs that enhance TAM phagocytosis. HDAC inhibitors, particularly Pracinostat and Resminostat, emerged as potent enhancers of phagocytosis, demonstrating synergy with CD47 blockade across multiple primary human TAM-GBM combinations. In a xenograft GBM model, Pracinostat suppressed tumor growth and extended survival with additive benefit when combined with CD47 antibodies. RNA-seq and H3K27Ac CUT&Tag profiling of Pracinostat-treated TAMs in vivo revealed a two-tier mechanism: transcriptional reprogramming toward a pro-inflammatory state via NF-kB activation, and epigenetic priming of FcgR-mediated phagocytic machinery, providing a mechanistic basis for the observed synergy with CD47 blockade.
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Direct links to NCBI, no account and no request form: the whole study as GSE330002_RAW.tar, processed values as the series matrix, the supplementary file directory, and per-sample supplementary files for any of the 7 samples. Raw sequencing reads are also available from ENA.

Also filed as BioProject PRJNA1462365 and SRA study SRP697739. Searching any of these in the dataset finder brings you back here.

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