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Senjor E, Mitrović A, Juki M, Proj M, Perišić Nanut M, Gobec S, Kos J. Preventing cystatin F proteolytic activation by cathepsin V increases cytotoxicity of effector immune cells. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)01129-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Breznik B, Ko M, Chen P, Senjor E, Majc B, Novak M, Habič A, Jewett A. P06.07.A Natural killer cells lyse glioblastoma stem cells and increase their sensitivity to chemotherapy. Neuro Oncol 2022; 24:ii39-ii39. [PMCID: PMC9443346 DOI: 10.1093/neuonc/noac174.131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2023] Open
Abstract
Abstract
Background
Glioblastoma is the most common and lethal brain tumor in the adult population and immunotherapy is playing an increasingly central role in the treatment of many cancers. Nevertheless, the search for effective immunotherapeutic approaches for glioblastoma patients continues. In this study, we aimed to explore the therapeutic potential of allogeneic highly activated super-charged natural killer (NK) cells in glioblastoma.
Material and Methods
Chromium release- and calcein release-based cytotoxicity assays, ELISA, ELISPOT, and multiplex cytokine assays were used to determine NK cell cytotoxicity against glioblastoma stem cells (GSCs) and secretion of cytokines. Cell surface marker expression using flow cytometry and cell growth in vitro and in vivo were measured to determine GSC phenotype. NK cell killing and penetration in 3D were measured using confocal microscopy of GSC tumorospheres.
Results
Super-charged NK cells efficiently lysed patient-derived GSCs in 2D and 3D models potentially reversing the immunosuppression observed in patients. NK-cells secreted IFN-γ, upregulated GSC surface expression of CD54 and MHC class I and increased sensitivity of GSCs to chemotherapeutic drugs. Co-localization of NK cells with GBM cells in perivascular niches in glioblastoma tissues and their direct contact with GSCs in tumorospheres suggests their ability to infiltrate glioblastoma tumors and target GSCs.
Conclusion
Allogeneic super-charged NK cells appear to be a potential therapeutic approach for glioblastoma by selectively killing therapy-resistant cancer stem cell population, increasing their immune-related surface markers and enhancing their sensitivity to chemotherapy. Due to GSC heterogeneity and plasticity personalized immunotherapeutic strategies should be developed to effectively target glioblastomas.
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Affiliation(s)
- B Breznik
- National Institute of Biology , Ljubljana , Slovenia
- Division of Oral Biology and Medicine, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, University of California School of Dentistry , Los Angeles, CA , United States
| | - M Ko
- Division of Oral Biology and Medicine, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, University of California School of Dentistry , Los Angeles, CA , United States
| | - P Chen
- Division of Oral Biology and Medicine, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, University of California School of Dentistry , Los Angeles, CA , United States
| | - E Senjor
- Department of Biotechnology, Jožef Stefan Institute , Ljubljana , Slovenia
| | - B Majc
- National Institute of Biology , Ljubljana , Slovenia
| | - M Novak
- National Institute of Biology , Ljubljana , Slovenia
| | - A Habič
- National Institute of Biology , Ljubljana , Slovenia
| | - A Jewett
- Division of Oral Biology and Medicine, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, University of California School of Dentistry , Los Angeles, CA , United States
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