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Macrophage Polarization Contributes to Glioblastoma Eradication by Combination Immunovirotherapy and Immune Checkpoint Blockade.

Cancer cell | 2017

Glioblastoma is an immunosuppressive, fatal brain cancer that contains glioblastoma stem-like cells (GSCs). Oncolytic herpes simplex virus (oHSV) selectively replicates in cancer cells while inducing anti-tumor immunity. oHSV G47Δ expressing murine IL-12 (G47Δ-mIL12), antibodies to immune checkpoints (CTLA-4, PD-1, PD-L1), or dual combinations modestly extended survival of a mouse glioma model. However, the triple combination of anti-CTLA-4, anti-PD-1, and G47Δ-mIL12 cured most mice in two glioma models. This treatment was associated with macrophage influx and M1-like polarization, along with increased T effector to T regulatory cell ratios. Immune cell depletion studies demonstrated that CD4+ and CD8+ T cells as well as macrophages are required for synergistic curative activity. This combination should be translatable to the clinic and other immunosuppressive cancers.

Pubmed ID: 28810147 RIS Download

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Associated grants

  • Agency: NCI NIH HHS, United States
    Id: R01 CA160762
  • Agency: NINDS NIH HHS, United States
    Id: R01 NS032677

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CD68 antibody (antibody)

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Anti-PD-L1 Antibody (antibody)

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PE/Cyanine7 anti-mouse CD152 (antibody)

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iNOS antibody (antibody)

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Recombinant Anti-Ki67 antibody [SP6] (antibody)

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Anti-CD3 antibody (antibody)

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F4/80 antibody [SP115] (antibody)

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T-bet / Tbx21 antibody [4B10] (antibody)

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Cleaved Caspase-3 (Asp175) Antibody (antibody)

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APC/Cyanine7 anti-mouse CD3epsilon (antibody)

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InVivoPlus polyclonal Syrian hamster IgG (antibody)

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rat IgG2b I sotype control (antibody)

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anti-mouse CD8α (antibody)

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Vero (cell line)

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Cell line Vero is a Spontaneously immortalized cell line with a species of origin Chlorocebus sabaeus

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CD68 antibody (antibody)

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