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

作者：Saha, Dipongkor; Martuza, Robert L.; Rabkin, Samuel D.^*

来源：Cancer Cell, 2017, 32(2): 253-+.

DOI：10.1016/j.ccell.2017.07.006

• CANCER STEM-CELLS
• TUMOR-ASSOCIATED MACROPHAGES
• REGULATORY T
• TALIMOGENE LAHERPAREPVEC
• GLIOMA
• VIRUS
• IPILIMUMAB
• IMMUNOTHERAPY
• THERAPY
• MODEL

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 G47 Delta expressing murine IL-12 (G47 Delta-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 G47 Delta-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.

• 出版日期2017-8-14