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Inosine Induces Stemness Features in HA-CAR-T cells and Enhances Potency [ATAC-seq]

ABSTRACT: Adenosine (Ado) mediates immune suppression in the tumor microenvironment and exhausted CD8+ HA-CAR-T cells commonly express CD39 and CD73, which mediate proximal steps in Ado generation. Here we sought to enhance HA-CAR-T cell potency by knocking out CD39, CD73 or adenosine receptor 2a (A2aR), but observed only modest effects. In contrast, overexpression of Ado deaminase (ADA-OE), which metabolizes Ado to inosine (INO), induced stemness features and potently enhanced HA-CAR-T functionality. Similarly, and to a greater extent, exposure of HA-CAR-T cells to INO augmented HA-CAR-T cell function and induced hallmark features of T cell stemness. INO induced profound metabolic reprogramming, diminishing glycolysis and increasing oxidative phosphorylation, glutaminolysis and polyamine synthesis, and reprogrammed the epigenome toward greater stemness. Clinical scale manufacturing using INO generated enhanced potency HA-CAR-T cell products meeting criteria for clinical dosing. These results identify INO as a potent modulator of T cell metabolism and epigenetic stemness programming and deliver a new enhanced potency platform for immune cell manufacturing.

ORGANISM(S): Homo sapiens

PROVIDER: GSE250439 | GEO | 2023/12/18

REPOSITORIES: GEO

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Inosine Induces Stemness Features in HA-CAR-T cells and Enhances Potency [RNA-seq]

Project description:Adenosine (Ado) mediates immune suppression in the tumor microenvironment and exhausted CD8+ HA-CAR-T cells commonly express CD39 and CD73, which mediate proximal steps in Ado generation. Here we sought to enhance HA-CAR-T cell potency by knocking out CD39, CD73 or adenosine receptor 2a (A2aR), but observed only modest effects. In contrast, overexpression of Ado deaminase (ADA-OE), which metabolizes Ado to inosine (INO), induced stemness features and potently enhanced HA-CAR-T functionality. Similarly, and to a greater extent, exposure of HA-CAR-T cells to INO augmented HA-CAR-T cell function and induced hallmark features of T cell stemness. INO induced profound metabolic reprogramming, diminishing glycolysis and increasing oxidative phosphorylation, glutaminolysis and polyamine synthesis, and reprogrammed the epigenome toward greater stemness. Clinical scale manufacturing using INO generated enhanced potency HA-CAR-T cell products meeting criteria for clinical dosing. These results identify INO as a potent modulator of T cell metabolism and epigenetic stemness programming and deliver a new enhanced potency platform for immune cell manufacturing.

2023-12-18 | GSE250442 | GEO

Surface AMP Deaminase 2 as a Novel Regulator Modifying Extracellular Adenine Nucleotide Metabolism

Project description:Adenine nucleotides represent crucial immunomodulators in the extracellular environment. The ectonucleotidases CD39 and CD73 are responsible for the sequential catabolism of ATP to adenosine via AMP, thereby promoting an anti-inflammatory milieu induced by the “adenosine halo”. AMPD2 intracellularly mediates AMP deamination to IMP, thus constituting an ambiguous mediator both enhancing the degradation of inflammatory ATP and reducing the formation of protective adenosine. Here, we show that this enzyme is expressed on the cell surface of human immune cells and its predominance may[BF1] modify inflammatory states by altering the extracellular milieu. Surface AMPD2 (eAMPD2) expression on monocytes was verified by immunoblot, mass spectrometry, surface biotinylation, and immunofluorescence microscopy. Flow cytometry revealed enhanced monocytic eAMPD2 expression after TLR stimulation. PBMCs from patients with rheumatoid arthritis displayed significantly higher levels of eAMPD2 expression compared to healthy controls. Furthermore, we observed that extracellular adenosine production was not impaired by an enhanced eAMPD2 expression, while IMP exerted anti-inflammatory effects. In summary, our study identifies eAMPD2 as a novel regulator of the extracellular ATP-adenosine balance adding to the immunomodulatory CD39-CD73 system.

2021-11-03 | PXD022350 | Pride

Co-inhibition of CD73 and a2bar improves long-term cigarette smoke exposure impaired airway wound repair

Project description:Adenosine (ADO) involvement in lung injury depends on the activation of its receptors (A1, A2A, A2B, A3). The A2A receptor (A2AAR) and A2B receptor (A2BAR) are best described to have both tissue-protective and tissue-destructive processes. However, no approach has been effective in delineating the mechanism(s) involved with ADO shifting from its tissue-protective to tissue-destructive properties in chronic airway injury. Using cigarette smoke (CS) as our model of injury, we hypothesized that chronic CS exposure increases CD73-generated ADO which, activates low affinity A2BAR, subsequently impairing airway wound repair. To test this hypothesis, we chronically exposed human bronchial epithelial cell line, Nuli-1 cells, to 5% CS extract (CSE) for three years establishing a long-term CSE exposure model (LTC). We found significant morphological changes, decreased proliferation, and migration resulting in impaired airway wound closure in LTC. Further investigations showed that CSE exposure upregulates CD73 and A2BAR expression, increases ADO production, inhibits PKC alpha activity and phosphorylation of MEK, ERK, p90RSK and CREB. Moreover, when both or either of A2BAR and CD73 are knocked down in LTC, PKC alpha is activated and there is an increase in phosphorylation of MEK, ERK, p90RSK and CREB. Collectively, long-term CSE exposure upregulates CD73 expression and increases ADO production, which promotes A2BAR activation and subsequent diminution of PKC alpha activity and ERK signaling pathway, and inhibition of airway wound repair. Moreover, the data suggested that targeting both A2BAR and CD73 as potential therapeutic targets may be more efficacious in improving chronic CS impaired wound repair than either alone.

2020-10-08 | GSE111952 | GEO

Single Cell Spatial Analysis Reveals the Topology of Immunomodulatory Purinergic Signaling in Glioblastoma

Project description:Abstract from manuscript Glioblastoma develops an immunosuppressive microenvironment that fosters tumorigenesis and resistance to current therapeutic strategies. Here we use multiplexed tissue imaging and single-cell RNA-sequencing to characterize the composition, spatial organization, and clinical significance of extracellular purinergic signaling in glioblastoma. We show that glioblastoma exhibit strong expression of CD39 and CD73 ectoenzymes, correlating with increased adenosine levels. Microglia are the predominant source of CD39, while CD73 is principally expressed by tumor cells, particularly in tumors with amplification of EGFR and astrocyte-like differentiation. Spatially-resolved single-cell analyses demonstrate strong spatial correlation between tumor CD73 and microglial CD39, and that their spatial proximity is associated with poor clinical outcomes. Together, this data reveals that tumor CD73 expression correlates with tumor genotype, lineage differentiation, and functional states, and that core purine regulatory enzymes expressed by neoplastic and tumor-associated myeloid cells interact to promote a distinctive adenosine-rich signaling niche and immunosuppressive microenvironment potentially amenable to therapeutic targeting.

2022-06-27 | ST002203 | MetabolomicsWorkbench

Comparison of transcription profile of Adenosine receptor (AdoR) null mutant and adenosine transporter (ENT2) partial mutant in Drosophila melanogaster 3rd instar larvae

Project description:Dysregulation of adenosine (Ado) homeostasis has been observed in both rodent models and human patients of Huntington’s disease (HD). However, the underlying mechanisms of Ado signaling in HD pathogenesis is still unclear. In this study we examined influence of Ado signaling on Drosophila HD model. We further compared the transcription profiles of AdoR and ENT2 mutants by microarray analysis to identify a downstream target of AdoR signaling, which mediates the AdoR effects on HD pathology. Our findings have important implications for the crosstalk between Ado signaling and pathogenic effects of HD as well as other human diseases associated with polyglutamine aggregation.

2020-10-17 | E-MTAB-8699 | biostudies-arrayexpress

Transcriptional profiling of Adenosine receptor (AdoR) null mutant in Drosophila melanogaster imagoes

Project description:Dysregulation of adenosine (Ado) homeostasis has been observed in both rodent models and human patients of Huntington’s disease (HD). However, the underlying mechanisms of Ado signaling in HD pathogenesis is still unclear. In this study we examined influence of Ado signaling on Drosophila HD model. We further examined the transcription profile of AdoR mutants by microarray analysis to identified a downstream target of AdoR signaling, which mediates the AdoR effects on HD pathology. Our findings have important implications for the crosstalk between Ado signaling and pathogenic effects of HD as well as other human diseases associated with polyglutamine aggregation.

2020-10-17 | E-MTAB-8704 | biostudies-arrayexpress

The Hypoxia-regulated Ectonucleotidase CD73 is a Host Determinant of HIV Latency [RNA-seq]

Project description:Deciphering the mechanisms underlying viral persistence is critical to achieving a cure for HIV infection. Here, we implement a systems approach to discover molecular signatures of HIV latently-infected CD4+ T cells, identifying the immunosuppressive, adenosine-producing ectonucleotidase CD73 as a key surface marker of latent cells. Hypoxic conditioning, reflecting the lymphoid tissue microenvironment, increases the frequency of CD73+ CD4+ T cells and promotes HIV latency. Transcriptomic profiles of CD73+ CD4+ T cells favor viral quiescence, immune evasion, and cell survival. CD73+ CD4+ T cells are capable of harboring a functional HIV reservoir and reinitiating productive infection ex vivo. CD73 or adenosine receptor blockade facilitates latent HIV reactivation in vitro, mechanistically linking adenosine signaling to viral quiescence. Finally, tissue imaging of lymph nodes from HIV-infected individuals on antiretroviral therapy reveals spatial association between CD73 expression and HIV persistence in vivo. Our findings warrant development of HIV cure strategies targeting the hypoxia-CD73-adenosine axis.

2023-09-28 | GSE244190 | GEO

The Hypoxia-regulated Ectonucleotidase CD73 is a Host Determinant of HIV Latency [Array]

2023-09-24 | GSE243577 | GEO

UPenn CAR T cell Responders and Non-responders

Project description:<p>The adoptive transfer of autologous T cells genetically modified to express a CD19-specific, 4-1BB/CD3zeta-signaling chimeric antigen receptor (CAR; CTL019) has shown remarkable activity in patients with B acute lymphoblastic leukemia. Similar therapy can induce long-term remissions for relapsed/refractory chronic lymphocytic leukemia (CLL) patients, but in only a small subset of subjects. The determinants of response and resistance to CTL019 therapy of CLL are not fully understood. We employed next generation sequencing of RNA (RNA-seq) to identify predictive indicators of response to CTL019 treatment. We performed RNA-seq on leukapheresis and manufactured infusion product T cells from patients with heavily pre-treated and high-risk disease. To characterize potency, we also performed RNA-seq on the cellular infusion product after CAR-specific stimulation. Our findings indicate that durable remission in CLL is associated with gene expression signatures of early memory T cell differentiation (e.g., STAT3), while T cells from poorly- or non-responding patients exhibited elevated expression of key regulators of late memory as well as effector T cell differentiation, apoptosis, aerobic glycolysis, hypoxia and exhaustion. These gene expression signatures, along with additional immunological biomarkers, may be used to identify which patients are most likely to respond to cellular therapies and suggest manufacturing modifications that might potentiate the generation of maximally efficacious infusion products.</p>

| phs001707 | dbGaP

Integrative Gene Expression Profiling Reveals G6PD-Mediated Resistance to RNA-Directed Nucleoside Analogues in B-Cell Neoplasms

Project description:8-amino-adenosine (8-NH2-Ado) inhibits RNA synthesis and specifically inhibits synthesis of mRNAs with short half-lives. We hypothesize that the mRNAs affected code for proteins important in apoptosis and glucose metabolism. Gene Expression Arrays will help us understand which gene families may be affected by this drug and give us a better understanding of mechanism of action of this drug 1. MM.1S cells treated with 8-amino-adenosine for 0, 5 hrs and 17 hrs. (myeloma cells sensitive to the drug) 2. U266 cells treated with 8-amino-adenosine for 0, 5 hrs and 17 hrs. (myeloma cells resistant to the drug). 3. Jeko cells treated with 8-amino-adenosine for 0, 5 hrs and 17 hrs. (Mantle cell lymphoma cells sensitive to drug) 4. Granta cells treated with 8-amino-adenosine for 0, 5 hrs and 17 hrs. (Mantle cell lymphoma cells resistant to drug).

2012-05-31 | E-GEOD-38145 | biostudies-arrayexpress

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