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Afzal A, Afzal Z, Bizink S, Davis A, Makahleh S, Mohamed Y, Coniglio SJ. Phagocytosis Checkpoints in Glioblastoma: CD47 and Beyond. Curr Issues Mol Biol 2024; 46:7795-7811. [PMID: 39194679 DOI: 10.3390/cimb46080462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 07/06/2024] [Accepted: 07/15/2024] [Indexed: 08/29/2024] Open
Abstract
Glioblastoma multiforme (GBM) is one of the deadliest human cancers with very limited treatment options available. The malignant behavior of GBM is manifested in a tumor which is highly invasive, resistant to standard cytotoxic chemotherapy, and strongly immunosuppressive. Immune checkpoint inhibitors have recently been introduced in the clinic and have yielded promising results in certain cancers. GBM, however, is largely refractory to these treatments. The immune checkpoint CD47 has recently gained attention as a potential target for intervention as it conveys a "don't eat me" signal to tumor-associated macrophages (TAMs) via the inhibitory SIRP alpha protein. In preclinical models, the administration of anti-CD47 monoclonal antibodies has shown impressive results with GBM and other tumor models. Several well-characterized oncogenic pathways have recently been shown to regulate CD47 expression in GBM cells and glioma stem cells (GSCs) including Epidermal Growth Factor Receptor (EGFR) beta catenin. Other macrophage pathways involved in regulating phagocytosis including TREM2 and glycan binding proteins are discussed as well. Finally, chimeric antigen receptor macrophages (CAR-Ms) could be leveraged for greatly enhancing the phagocytosis of GBM and repolarization of the microenvironment in general. Here, we comprehensively review the mechanisms that regulate the macrophage phagocytosis of GBM cells.
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Affiliation(s)
- Amber Afzal
- School of Integrative Science and Technology, Kean University, Union, NJ 07083, USA
| | - Zobia Afzal
- School of Integrative Science and Technology, Kean University, Union, NJ 07083, USA
| | - Sophia Bizink
- School of Integrative Science and Technology, Kean University, Union, NJ 07083, USA
| | - Amanda Davis
- School of Integrative Science and Technology, Kean University, Union, NJ 07083, USA
| | - Sara Makahleh
- School of Integrative Science and Technology, Kean University, Union, NJ 07083, USA
| | - Yara Mohamed
- School of Integrative Science and Technology, Kean University, Union, NJ 07083, USA
| | - Salvatore J Coniglio
- School of Integrative Science and Technology, Kean University, Union, NJ 07083, USA
- Department of Biological Sciences, Kean University, Union, NJ 07083, USA
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Repici A, Ardizzone A, De Luca F, Colarossi L, Prestifilippo A, Pizzino G, Paterniti I, Esposito E, Capra AP. Signaling Pathways of AXL Receptor Tyrosine Kinase Contribute to the Pathogenetic Mechanisms of Glioblastoma. Cells 2024; 13:361. [PMID: 38391974 PMCID: PMC10886920 DOI: 10.3390/cells13040361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/05/2024] [Accepted: 02/16/2024] [Indexed: 02/24/2024] Open
Abstract
Brain tumors are a diverse collection of neoplasms affecting the brain with a high prevalence rate in people of all ages around the globe. In this pathological context, glioblastoma, a form of glioma that belongs to the IV-grade astrocytoma group, is the most common and most aggressive form of the primary brain tumors. Indeed, despite the best treatments available including surgery, radiotherapy or a pharmacological approach with Temozolomide, glioblastoma patients' mortality is still high, within a few months of diagnosis. Therefore, to increase the chances of these patients surviving, it is critical to keep finding novel treatment opportunities. In the past, efforts to treat glioblastoma have mostly concentrated on customized treatment plans that target specific mutations such as epidermal growth factor receptor (EGFR) mutations, Neurotrophic Tyrosine Receptor Kinase (NTRK) fusions, or multiple receptors using multi-kinase inhibitors like Sunitinib and Regorafenib, with varying degrees of success. Here, we focused on the receptor tyrosine kinase AXL that has been identified as a mediator for tumor progression and therapy resistance in various cancer types, including squamous cell tumors, small cell lung cancer, and breast cancer. Activated AXL leads to a significant increase in tumor proliferation, tumor cell migration, and angiogenesis in different in vitro and in vivo models of cancer since this receptor regulates interplay with apoptotic, angiogenic and inflammatory pathways. Based on these premises, in this review we mainly focused on the role of AXL in the course of glioblastoma, considering its primary biological mechanisms and as a possible target for the application of the most recent treatments.
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Affiliation(s)
- Alberto Repici
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres, 31, 98166 Messina, Italy; (A.R.); (A.A.); (F.D.L.); (I.P.); (A.P.C.)
| | - Alessio Ardizzone
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres, 31, 98166 Messina, Italy; (A.R.); (A.A.); (F.D.L.); (I.P.); (A.P.C.)
| | - Fabiola De Luca
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres, 31, 98166 Messina, Italy; (A.R.); (A.A.); (F.D.L.); (I.P.); (A.P.C.)
| | - Lorenzo Colarossi
- Istituto Oncologico del Mediterraneo, Via Penninazzo 7, 95029 Viagrande, Italy; (L.C.); (A.P.); (G.P.)
| | - Angela Prestifilippo
- Istituto Oncologico del Mediterraneo, Via Penninazzo 7, 95029 Viagrande, Italy; (L.C.); (A.P.); (G.P.)
| | - Gabriele Pizzino
- Istituto Oncologico del Mediterraneo, Via Penninazzo 7, 95029 Viagrande, Italy; (L.C.); (A.P.); (G.P.)
| | - Irene Paterniti
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres, 31, 98166 Messina, Italy; (A.R.); (A.A.); (F.D.L.); (I.P.); (A.P.C.)
| | - Emanuela Esposito
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres, 31, 98166 Messina, Italy; (A.R.); (A.A.); (F.D.L.); (I.P.); (A.P.C.)
| | - Anna Paola Capra
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres, 31, 98166 Messina, Italy; (A.R.); (A.A.); (F.D.L.); (I.P.); (A.P.C.)
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