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Glutamine antagonist JHU083 reprograms immunosuppressive tumor-associated macrophages to drive tumor immunity in urologic cancers, bulk RNA-seq

ABSTRACT: Glutamine metabolism in the tumor microenvironment is emerging as a critical regulator of immune-mediated anti-tumor responses. We report potent tumor growth inhibition by the glutamine antagonist prodrug JHU083 in urologic tumors by JHU083-reprogrammed tumor-associated macrophages (TAMs) and tumor-infiltrating monocytes (TIMs). Using orthogonal approaches, we show that JHU083-mediated glutamine antagonism in the tumor microenvironment induces TNF, inflammatory, and mTORC1 signaling in different intra-tumoral TAM clusters. Additionally, we report that JHU083 increases proliferation in tissue-resident macrophages intratumorally and in different TAM sub-clusters. Functionally, we report that JHU083-reprogrammed TAMs have increased tumor cell phagocytosis and diminished pro-angiogenic capacities. In vivo inhibition of glutamine consumption in TAMs results in increased glycolysis, broken TCA cycle, and disruption in purine metabolism. Although the effect of glutamine antagonism was less profound on tumor-infiltrating T cells for their anti-tumor activity, it promoted a stem cell-like phenotype in CD8+ T cells and decreased the CD4+ Treg abundance. Additionally, we report that JHU083 causes a global shutdown in glutamine utilizing metabolic pathways in tumor cells, leading to reduced HIF-1, c-MYC phosphorylation, and induction of tumor cell apoptosis, all key anti-tumoral features.

ORGANISM(S): Mus musculus

PROVIDER: GSE229222 | GEO | 2024/05/18

REPOSITORIES: GEO

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Glutamine antagonist JHU083 reprograms immunosuppressive tumor-associated macrophages to drive tumor immunity in urologic cancers, single-cell RNA-seq

Project description:Glutamine metabolism in the tumor microenvironment is emerging as a critical regulator of immune-mediated anti-tumor responses. We report potent tumor growth inhibition by the glutamine antagonist prodrug JHU083 in urologic tumors by JHU083-reprogrammed tumor-associated macrophages (TAMs) and tumor-infiltrating monocytes (TIMs). Using orthogonal approaches, we show that JHU083-mediated glutamine antagonism in the tumor microenvironment induces TNF, inflammatory, and mTORC1 signaling in different intra-tumoral TAM clusters. Additionally, we report that JHU083 increases proliferation in tissue-resident macrophages intratumorally and in different TAM sub-clusters. Functionally, we report that JHU083-reprogrammed TAMs have increased tumor cell phagocytosis and diminished pro-angiogenic capacities. In vivo inhibition of glutamine consumption in TAMs results in increased glycolysis, broken TCA cycle, and disruption in purine metabolism. Although the effect of glutamine antagonism was less profound on tumor-infiltrating T cells for their anti-tumor activity, it promoted a stem cell-like phenotype in CD8+ T cells and decreased the CD4+ Treg abundance. Additionally, we report that JHU083 causes a global shutdown in glutamine utilizing metabolic pathways in tumor cells, leading to reduced HIF-1, c-MYC phosphorylation, and induction of tumor cell apoptosis, all key anti-tumoral features.

2024-05-18 | GSE229223 | GEO

ZEB2 is a Master Switch Controlling the Tumor-Associated Macrophage Program [in vivo]

Project description:Tumor-associated macrophages (TAMs) are major players in regulating the immunosuppressive tumor environment, and their abundance is highly correlated with poor clinical outcomes. Here, we constructed a TAM regulatory network by integrating scRNA-seq data across human solid tumors with a dedicated CRISPR knockout screen. Using a deep generative model capable of learning a local representation for each candidate regulator, we constructed a gene perturbation network that linked individual target genes with prototypical functional modules in TAMs. We identified non-redundant pathways regulating distinct TAM functions, showing modular circuitry. For instance, the complement module is repressed by Stat6, Zeb2, Gpnmb, and Spp1, while the Tgfbr1-Smad2/4 pathway induces this program in TAMs. Importantly, we identified Zeb2 as the master regulator of pro-tumor functions in TAMs, orchestrating the suppression of type I interferon response and antigen presentation alongside the activation of immune suppression programs. Genetic ablation of Zeb2 reprogrammed TAMs identity on chromatin, RNA, and protein levels. In human tumors with high macrophage content, ZEB2 expression was associated with poor prognosis in solid cancers, including lung and bladder. Functional macrophage coculturing assays defined Zeb2 as a critical regulator of TAM immunosuppression activity by inhibiting T cell proliferation and activation. Selective in vivo targeting of Zeb2 in macrophages using a CpGsiRNAZeb2 DNA hybrid reprogrammed TAMs and mobilized systematic anti-tumoral T cell responses, achieving complete tumor clearance as a monotherapy. Overall, our study generated a detailed genetic roadmap of TAM gene circuits and identified ZEB2 as a master switch of TAMs with potential therapeutic implications for macrophage-based immunotherapies.

2025-03-10 | GSE269191 | GEO

ZEB2 is a Master Switch Controlling the Tumor-Associated Macrophage Program [in vitro]

2025-03-10 | GSE269187 | GEO

ZEB2 is a Master Switch Controlling the Tumor-Associated Macrophage Program [KO_screen]

2025-03-10 | GSE269188 | GEO

The Cellular and Molecular Origin of Tumor-associated Macrophages

Project description:Long recognized as an evolutionarily ancient cell type involved in tissue homeostasis and immune defense against pathogens, macrophages are being rediscovered as regulators of several diseases including cancer. Here we show that in mice, mammary tumor growth induces the accumulation of tumor-associated macrophages (TAMs) that are phenotypically and functionally distinct from mammary tissue macrophages (MTMs). TAMs express the adhesion molecule Vcam1 and proliferate upon their differentiation from inflammatory monocytes, but do not exhibit an “alternatively activated” phenotype. TAM differentiation depends on the transcriptional regulator of Notch signaling, RBPJ; and TAM, but not MTM, depletion restores tumor-infiltrating cytotoxic T cell responses and suppresses tumor growth. These findings reveal the ontogeny of TAMs and a discrete tumor-elicited inflammatory response, which may provide new opportunities for cancer immunotherapy. MMTV-PyMT mice (Jackson Laboratory) were backcrossed to the C57BL/6 background for 10 generations. Rbpjfl/fl mice were provided by Tasuku Honjo and crossed to CD11ccre mice provided by Boris Reizis. Littermate controls were used in all experiments when possible. All mice were maintained in a specific pathogen-free facility and animal experimentation was conducted in accordance with institutional guidelines. In the MMTV-PyMT spontaneous mammary tumor model, we found the key Notch transcriptional regulator, RBPJ, to be required for TAM terminal differentiation from inflammatory monocytes. The bulk myeloid cell population that remains in CD11cCreRbpj fl/fl mice (the cells in "Rbpj KO" samples), represents monocytes that have begun their differentiation into macrophages, but are unable to terminally differentiate due to the lack of Rbpj.

2014-04-18 | E-GEOD-56755 | biostudies-arrayexpress

Timing and location dictate monocyte fate and their transition to tumor-associated macrophages

Project description:Tumor-associated macrophages (TAMs) are a heterogeneous population of cells whose phenotypes and functions are shaped by factors that are incompletely understood. Herein, we asked when and where TAMs arise from blood monocytes, and how they evolve during tumor development. We initiated pancreatic ductal adenocarcinoma (PDAC) in inducible monocyte fate-mapping mice and combined single-cell transcriptomics and high-dimensional flow cytometry to profile the monocyte-to-TAM transition. We revealed that monocytes differentiate first into a transient intermediate population of TAMs (IntTAM) that generates two longer-lived lineages of terminally differentiated TAMs with distinct gene expression profiles, phenotypes and intra-tumoral localization. Transcriptome datasets and tumor samples from patients with PDAC evidenced parallel TAM populations in humans and their prognostic associations. These insights will support the design of new therapeutic strategies targeting TAMs in PDAC.

2024-08-02 | GSE270793 | GEO

Tumor-Associated Microglia Secrete Extracellular ATP to Support Glioblastoma Progression

Project description:Glioblastoma (GBM) is a highly aggressive brain tumor with poor prognosis and high recurrence rates. The complex immune microenvironment of GBM is highly infiltrated by tumor-associated microglia and macrophages (TAMs). TAMs are known to be heterogeneous in their functional and metabolic states and can transmit either pro-tumoral or anti-tumoral signals to glioma cells. Here, we performed bulk RNA-seq and single-cell RNA-seq on GBM patient samples, which revealed increased ATP synthase expression and oxidative phosphorylation (OXPHOS) activity in TAMs located in the tumor core relative to the tumor periphery. Both in vitro and in vivo models displayed similar trends of augmented TAM mitochondrial activity, along with elevated mitochondrial fission, glucose uptake, mitochondrial membrane potential, and extracellular ATP (eATP) production by TAMs in the presence of GBM cells. Tumor-secreted factors, including GM-CSF, induced the increase in TAM eATP production. Elevated eATP in the GBM microenvironment promoted glioma growth and invasion by activating the P2X purinoceptor 7 (P2X7R) on glioma cells. Inhibition of the eATP-P2X7R axis attenuated tumor cell viability in vitro and reduced tumor size and prolonged survival in glioma-bearing mouse models. Overall, this study revealed elevated TAM-derived eATP in GBM and provided the basis for targeting the eATP-P2X7R signaling axis as a therapeutic strategy in GBM.

2024-08-30 | GSE275293 | GEO

RNA-sequencing on sorted infiltrating CD8 T cells from vehicle or JHU083, pro-drug of 6-Diazo-5-oxo-L-norleucine (glutamine antagonist) treated MC38 (colon cancer) tumor bearing mice

Project description:RNA-sequencing was performed on sorted CD11b-CD11c-B220-CD45+TCRbeta+CD44+CD8+ TIL from vehicle or JHU083 treated MC38 tumor-bearing mice with or without JHU083, pro-drug of 6-Diazo-5-oxo-L-norleucine (glutamine antagonist) treatment for expression profiling

2020-02-24 | GSE120345 | GEO

Transcription profile of infiltrating monocytes derived from 3D liver cancer cell line spheroids

Project description:To study the molecular mechanism of tumor associated macrophages (TAMs), the RNA of infiltrating monocytes derived from in vitro liver cancer spheroid model were performed. The results indicated that the cholesterol metabolism-related genes enriched in the infiltrating monocytes, which presented the M2-like TAM phenotypes.

2023-10-25 | GSE216515 | GEO

High-density gene expression analysis of tumor-associated macrophages from mouse mammary tumors

Project description:Clinical and experimental evidence indicates that tumor-associated macrophages (TAMs) promote malignant progression. In breast cancer, TAMs enhance tumor angiogenesis, tumor cell invasion, matrix remodeling, and immune suppression against the tumor. In this study, we examined late-stage mammary tumors from a transgenic mouse model of breast cancer. We used flow cytometry under conditions that minimized gene expression changes to isolate a rigorously defined TAM population previously shown to be associated with invasive carcinoma cells. The gene expression signature of this population was compared with a similar population derived from spleens of non-tumor-bearing mice using high-density oligonucleotide arrays. Using stringent selection criteria, transcript abundance of 460 genes was shown to be differentially regulated between the two populations. Bioinformatic analyses of known functions of these genes indicated that formerly ascribed TAM functions, including suppression of immune activation and matrix remodeling, as well as multiple mediators of tumor angiogenesis, were elevated in TAMs. Further bioinformatic analyses confirmed that a pure and valid TAM gene expression signature in mouse tumors could be used to assess expression of TAMs in human breast cancer. The data derived from these more physiologically relevant autochthonous tumors compared with previous studies in tumor xenografts suggest tactics by which TAMs may regulate tumor angiogenesis and thus provide a basis for exploring other transcriptional mediators of TAM trophic functions within the tumor microenvironment. Tumor-associated macrophages from late-stage mouse mammary tumors compared to splenic macrophages from non-tumor-bearing littermate controls. 4 biological replicates of each population were compared via gene expression arrays.

2010-06-21 | E-GEOD-18404 | biostudies-arrayexpress

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