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Caponegro MD, Oh K, Madeira MM, Radin D, Sterge N, Tayyab M, Moffitt RA, Tsirka SE. A distinct microglial subset at the tumor-stroma interface of glioma. Glia 2021; 69:1767-1781. [PMID: 33704822 DOI: 10.1002/glia.23991] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 02/09/2021] [Accepted: 03/02/2021] [Indexed: 02/01/2023]
Abstract
The characterization of the tumor microenvironment (TME) in high grade gliomas (HGG) has generated significant interest in an effort to understand how neoplastic lesions in the central nervous system (CNS) are supported and to devise novel therapeutic targets. The TME of the CNS contains unique and specialized cells, including the resident myeloid cells, microglia. Myeloid involvement in HGG, such as glioblastoma, is associated with poor outcomes. Glioma-associated microglia and infiltrating monocytes/macrophages (GAM) accumulate within the neoplastic lesion where they facilitate tumor growth and drive immunosuppression. However, it has been difficult to differentiate whether microglia and macrophages have similar or distinct roles in pathology, and if the spatial organization of these cells informs outcomes. Here, we characterize the tumor-stroma border and identify peritumoral GAM (PGAM) as a unique subpopulation of GAM. Using data mining and analyses of samples derived from both murine and human sources we show that PGAM exhibit a pro-inflammatory and chemotactic phenotype that is associated with peripheral monocyte recruitment, and decreased overall survival. PGAM act as a unique subset of GAM at the tumor-stroma interface. We define a novel gene signature to identify these cells and suggest that PGAM constitute a cellular target of the TME.
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Affiliation(s)
- Michael D Caponegro
- Program in Molecular and Cellular Pharmacology, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA.,Department of Pharmacological Sciences, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA
| | - Ki Oh
- Medical Scientist Training Program, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA.,Department of Biomedical Informatics, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA
| | - Miguel M Madeira
- Program in Molecular and Cellular Pharmacology, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA.,Department of Pharmacological Sciences, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA
| | - Daniel Radin
- Program in Molecular and Cellular Pharmacology, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA.,Department of Pharmacological Sciences, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA.,Medical Scientist Training Program, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA
| | - Nicholas Sterge
- Department of Pharmacological Sciences, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA
| | - Maryam Tayyab
- Department of Pharmacological Sciences, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA
| | - Richard A Moffitt
- Department of Pharmacological Sciences, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA.,Department of Biomedical Informatics, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA.,Department of Pathology, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA.,Stony Brook Cancer Center, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA
| | - Stella E Tsirka
- Program in Molecular and Cellular Pharmacology, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA.,Department of Pharmacological Sciences, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York, USA
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