期刊
JOURNAL FOR IMMUNOTHERAPY OF CANCER
卷 10, 期 9, 页码 -出版社
BMJ PUBLISHING GROUP
DOI: 10.1136/jitc-2021-004452
关键词
Phagocytosis; Brain Neoplasms; Tumor Microenvironment; Macrophages
资金
- National Natural Science Foundation of China [82072797, 81772676, 82002654]
- Tianjin Education Commission [2020ZD13]
- Natural Science Foundation of Tianjin City [18JCJQJC48200]
- Natural Science Foundation of Hubei [2020CFB671]
- China Postdoctoral Science Foundation [2022T150474]
This study reveals that GBM cells with high level LRIG2 can escape phagocytosis by tumor-associated microglia/macrophages, highlighting the potential of early clinical trials targeting LRIG2 and CD47-SIRP alpha as a novel treatment for GBM.
Background Glioblastoma (GBM) is the most common malignant brain tumor with poor clinical outcomes. Immunotherapy has recently been an attractive and promising treatment of extracranial malignancies, however, most of clinical trials for GBM immunotherapy failed due to predominant accumulation of tumor-associated microglia/macrophages (TAMs). Results High level of LRIG2/soluble LRIG2 (sLRIG2) expression activates immune-related signaling pathways, which are associated with poor prognosis in GBM patients. LRIG2/sLRIGs promotes CD47 expression and facilitates TAM recruitment. Blockade of CD47-SIRP alpha interactions and inhibition of sLRIG2 secretion synergistically suppress GBM progression in an orthotropic murine GBM model. Conclusions GBM cells with high level LRIG2 escape the phagocytosis by TAM via the CD47-SIRP alpha axis, highlighting a necessity for an early stage of clinical trial targeting LRIG2 and CD47-SIRP alpha as a novel treatment for patients with GBM.
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