Cell Reports (Aug 2023)

Genetically modified IL2 bone-marrow-derived myeloid cells reprogram the glioma immunosuppressive tumor microenvironment

  • Alessandro Canella,
  • Matthew Nazzaro,
  • Sakthi Rajendran,
  • Claire Schmitt,
  • Abigail Haffey,
  • Giovanni Nigita,
  • Diana Thomas,
  • Justin M. Lyberger,
  • Gregory K. Behbehani,
  • Nduka M. Amankulor,
  • Elaine R. Mardis,
  • Timothy P. Cripe,
  • Prajwal Rajappa

Journal volume & issue
Vol. 42, no. 8
p. 112891

Abstract

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Summary: Gliomas are one of the leading causes of cancer-related death in the adolescent and young adult (AYA) population. Two-thirds of AYA glioma patients are affected by low-grade gliomas (LGGs), but there are no specific treatments. Malignant progression is supported by the immunosuppressive stromal component of the tumor microenvironment (TME) exacerbated by M2 macrophages and a paucity of cytotoxic T cells. A single intravenous dose of engineered bone-marrow-derived myeloid cells that release interleukin-2 (GEMys-IL2) was used to treat mice with LGGs. Our results demonstrate that GEMys-IL2 crossed the blood-brain barrier, infiltrated the TME, and reprogrammed the immune cell composition and transcriptome. Moreover, GEMys-IL2 extended survival in an LGG immunocompetent mouse model. Here, we report the efficacy of an in vivo approach that demonstrates the potential for a cell-mediated innate immunotherapy designed to enhance the recruitment of activated effector T and natural killer cells within the glioma TME.

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