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Kiran S, Xue Y, Sarker DB, Li Y, Sang QXA. Feeder-free differentiation of human iPSCs into natural killer cells with cytotoxic potential against malignant brain rhabdoid tumor cells. Bioact Mater 2024; 36:301-316. [PMID: 38496035 PMCID: PMC10940949 DOI: 10.1016/j.bioactmat.2024.02.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 02/21/2024] [Accepted: 02/23/2024] [Indexed: 03/19/2024] Open
Abstract
Natural killer (NK) cells are cytotoxic immune cells that can eliminate target cells without prior stimulation. Human induced pluripotent stem cells (iPSCs) provide a robust source of NK cells for safe and effective cell-based immunotherapy against aggressive cancers. In this in vitro study, a feeder-free iPSC differentiation was performed to obtain iPSC-NK cells, and distinct maturational stages of iPSC-NK were characterized. Mature cells of CD56bright CD16bright phenotype showed upregulation of CD56, CD16, and NK cell activation markers NKG2D and NKp46 upon IL-15 exposure, while exposure to aggressive atypical teratoid/rhabdoid tumor (ATRT) cell lines enhanced NKG2D and NKp46 expression. Malignant cell exposure also increased CD107a degranulation markers and stimulated IFN-γ secretion in activated NK cells. CD56bright CD16bright iPSC-NK cells showed a ratio-dependent killing of ATRT cells, and the percentage lysis of CHLA-05-ATRT was higher than that of CHLA-02-ATRT. The iPSC-NK cells were also cytotoxic against other brain, kidney, and lung cancer cell lines. Further NK maturation yielded CD56-ve CD16bright cells, which lacked activation markers even after exposure to interleukins or ATRT cells - indicating diminished cytotoxicity. Generation and characterization of different NK phenotypes from iPSCs, coupled with their promising anti-tumor activity against ATRT in vitro, offer valuable insights into potential immunotherapeutic strategies for brain tumors.
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Affiliation(s)
- Sonia Kiran
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA
| | - Yu Xue
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA
| | - Drishty B. Sarker
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA
| | - Yan Li
- Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL, 32310-6046, USA
- Institute of Molecular Biophysics, Florida State University, Tallahassee, FL, 32306-4380, USA
| | - Qing-Xiang Amy Sang
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA
- Institute of Molecular Biophysics, Florida State University, Tallahassee, FL, 32306-4380, USA
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Ballesteros-Ribelles A, Millán-López A, Carmona-Luque MD, Herrera C. Granulocyte Colony Stimulating Factor-Mobilized Peripheral Blood Mononuclear Cells: An Alternative Cellular Source for Chimeric Antigen Receptor Therapy. Int J Mol Sci 2024; 25:5769. [PMID: 38891957 PMCID: PMC11171785 DOI: 10.3390/ijms25115769] [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: 04/27/2024] [Revised: 05/21/2024] [Accepted: 05/23/2024] [Indexed: 06/21/2024] Open
Abstract
Lymphocyte collection by apheresis for CAR-T production usually does not include blood mobilized using granulocyte colony stimulating factor (G-CSF) due to the widespread knowledge that it causes a decrease in the number and functionality of lymphocytes. However, it is used for stem cell transplant, which is a common treatment for hematological malignancies. The growing demand for CAR therapies (CAR-T and NK-CAR), both in research and clinics, makes it necessary to evaluate whether mobilized PBSC products may be potential candidates for use in such therapies. This review collects recent works that experimentally verify the role and functionality of T and NK lymphocytes and the generation of CAR-T from apheresis after G-CSF mobilization. As discussed, T cells do not vary significantly in their phenotype, the ratio of CD4+ and CD8+ remains constant, and the different sub-populations remain stable. In addition, the expansion and proliferation rates are invariant regardless of mobilization with G-CSF as well as the secretion of proinflammatory cytokines and the cytotoxic ability. Therefore, cells mobilized before apheresis are postulated as a new alternative source of T cells for adoptive therapies that will serve to alleviate high demand, increase availability, and take advantage of the substantial number of existing cryopreserved products.
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Affiliation(s)
| | - Alejandro Millán-López
- Cell Therapy Group, Maimonides Institute for Biomedical Research, 14004 Córdoba, Spain; (A.B.-R.); (A.M.-L.)
| | - MDolores Carmona-Luque
- Cell Therapy Group, Maimonides Institute for Biomedical Research, 14004 Córdoba, Spain; (A.B.-R.); (A.M.-L.)
| | - Concha Herrera
- Cell Therapy Group, Maimonides Institute for Biomedical Research, 14004 Córdoba, Spain; (A.B.-R.); (A.M.-L.)
- Department of Hematology, Reina Sofia University Hospital, 14004 Córdoba, Spain
- Department of Medical and Surgical Sciences, University of Córdoba, 14004 Córdoba, Spain
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Ma X, Jiang J, An X, Zu W, Ma C, Zhang Z, Lu Y, Zhao L, Wang L. Advances in research based on antibody-cell conjugation. Front Immunol 2023; 14:1310130. [PMID: 38162639 PMCID: PMC10755917 DOI: 10.3389/fimmu.2023.1310130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 12/04/2023] [Indexed: 01/03/2024] Open
Abstract
Antibody-cell conjugation (ACC) technology is a new research direction in medicine and biotechnology in recent years. The concept of ACC was proposed by Hsiao et al. and developed into a viable cell therapy technology, which refers to the cells with specific functions. Such as natural killer cells (NK cells), cytokine induced killer cells (CIK) and other immune cells and monoclonal antibodies through the linker together formed conjugate. ACC directly modifies specific antibodies on the cell surface through a simple and effective chemical coupling method to enable cells to have new functions. ACC has been developed for the treatment of various diseases, including cancers of the blood system and solid tumors. This paper reviews the current ACC construction methods, challenges and future development directions.
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Affiliation(s)
- Xiaoxuan Ma
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, China
| | - Jian Jiang
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, China
| | - Xiaoye An
- Department of Pharmacy, Tacheng People's Hospital, Tacheng City, Xinjiang Uygur Autonomous Region, China
| | - Wanting Zu
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, China
| | - Chi Ma
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, China
| | - Zhuo Zhang
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, China
| | - Yaci Lu
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, China
| | - Lijing Zhao
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, China
| | - Lisheng Wang
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, China
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4
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Qiu L, Zhang Y, Zeng X. The function of γδ T cells in humoral immune responses. Inflamm Res 2023; 72:747-755. [PMID: 36799949 DOI: 10.1007/s00011-023-01704-4] [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: 11/24/2022] [Revised: 02/04/2023] [Accepted: 02/06/2023] [Indexed: 02/18/2023] Open
Abstract
PURPOSE The purpose of this review is to discuss the role of γδ T cells played in humoral immune responses. BACKGROUND The γδ T cell receptor (γδ TCR) recognizes antigens, including haptens and proteins, in an MHC-independent manner. The recognition of these antigens by γδ TCRs crosses antigen recognition by the B cell receptors (BCRs), suggesting that γδ T cells may be involved in the process of antigen recognition and activation of B cells. However, the role of γδ T cells in humoral immune responses is still less clear. METHODS The kinds of literature about the γδ T cell-B cell interaction were searched on PubMed with search terms, such as γδ T cells, antibody, B cell responses, antigen recognition, and infection. RESULTS Accumulating evidence indicates that γδ T cells, independent of αβ T cells, participate in multiple steps of humoral immunity, including B cell maturation, activation and differentiation, antibody production and class switching. Mechanically, γδ T cells affect B cell function by directly interacting with B cells, secreting cytokines, or modulating αβ T cells. CONCLUSION In this review, we summarize current knowledge on how γδ T cells take part in the humoral immune response, which may assist future vaccine design.
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Affiliation(s)
- Lingfeng Qiu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yixi Zhang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xun Zeng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
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Chaicharoenaudomrung N, Kunhorm P, Noisa P. Cordycepin Enhances the Cytotoxicity of Human Natural Killer Cells against Cancerous Cells. Biol Pharm Bull 2023; 46:1260-1268. [PMID: 37661405 DOI: 10.1248/bpb.b23-00221] [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] [Indexed: 09/05/2023]
Abstract
Cancer treatment with natural killer (NK) cell immunotherapy is promising. NK cells can recognize and kill cancer cells without sensitization, making them a potential cancer treatment alternative. To improve clinical efficacy and safety, more research is needed. Enhancing NK cell function improves therapeutic efficacy. Due to its potent apoptosis induction, Cordycepin, a bioactive compound from Cordyceps spp., inhibits cancer cell growth. Cordycepin has immunoregulatory properties, making it a promising candidate for combination therapy with NK cell-based immunotherapy. Cordycepin may enhance NK cell function and have clinical applications, but more research is needed. In this study, cordycepin treatment of NK-92 MI cells increased THP-1 and U-251 cell cytotoxicity. Cordycepin also significantly increased the mRNA expression of cytokine-encoding genes, including tumour necrosis factor (TNF), interferon gamma (IFNG), and interleukin 2 (IL2). NK-92 MI cells notably secreted more IFNG and granzyme B. Cordycepin also decreased CD27 and increased CD11b, CD16, and NKG2D in NK-92 MI cells, which improved its anti-cancer ability. In conclusion, cordycepin could enhance NK cell cytotoxicity against cancerous cells for the first time, supporting its use as an alternative immunoactivity agent against cancer cells. Further studies are needed to investigate its efficacy and safety in clinical settings.
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Affiliation(s)
- Nipha Chaicharoenaudomrung
- Laboratory of Cell-Based Assays and Innovations, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology
| | - Phongsakorn Kunhorm
- Laboratory of Cell-Based Assays and Innovations, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology
| | - Parinya Noisa
- Laboratory of Cell-Based Assays and Innovations, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology
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Della Chiesa M, Setti C, Giordano C, Obino V, Greppi M, Pesce S, Marcenaro E, Rutigliani M, Provinciali N, Paleari L, DeCensi A, Sivori S, Carlomagno S. NK Cell-Based Immunotherapy in Colorectal Cancer. Vaccines (Basel) 2022; 10:1033. [PMID: 35891197 PMCID: PMC9323201 DOI: 10.3390/vaccines10071033] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 06/22/2022] [Accepted: 06/25/2022] [Indexed: 02/01/2023] Open
Abstract
Human Natural Killer (NK) cells are all round players in immunity thanks to their powerful and immediate response against transformed cells and the ability to modulate the subsequent adaptive immune response. The potential of immunotherapies based on NK cell involvement has been initially revealed in the hematological setting but has inspired the design of different immune tools to also be applied against solid tumors, including colorectal cancer (CRC). Indeed, despite cancer prevention screening plans, surgery, and chemotherapy strategies, CRC is one of the most widespread cancers and with the highest mortality rate. Therefore, further efficient and complementary immune-based therapies are in urgent need. In this review, we gathered the most recent advances in NK cell-based immunotherapies aimed at fighting CRC, in particular, the use of monoclonal antibodies targeting tumor-associated antigens (TAAs), immune checkpoint blockade, and adoptive NK cell therapy, including NK cells modified with chimeric antigen receptor (CAR-NK).
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Affiliation(s)
- Mariella Della Chiesa
- Department of Experimental Medicine (DIMES), University of Genoa, 16132 Genoa, Italy; (C.S.); (C.G.); (V.O.); (M.G.); (S.P.); (E.M.); (S.S.)
| | - Chiara Setti
- Department of Experimental Medicine (DIMES), University of Genoa, 16132 Genoa, Italy; (C.S.); (C.G.); (V.O.); (M.G.); (S.P.); (E.M.); (S.S.)
| | - Chiara Giordano
- Department of Experimental Medicine (DIMES), University of Genoa, 16132 Genoa, Italy; (C.S.); (C.G.); (V.O.); (M.G.); (S.P.); (E.M.); (S.S.)
| | - Valentina Obino
- Department of Experimental Medicine (DIMES), University of Genoa, 16132 Genoa, Italy; (C.S.); (C.G.); (V.O.); (M.G.); (S.P.); (E.M.); (S.S.)
| | - Marco Greppi
- Department of Experimental Medicine (DIMES), University of Genoa, 16132 Genoa, Italy; (C.S.); (C.G.); (V.O.); (M.G.); (S.P.); (E.M.); (S.S.)
| | - Silvia Pesce
- Department of Experimental Medicine (DIMES), University of Genoa, 16132 Genoa, Italy; (C.S.); (C.G.); (V.O.); (M.G.); (S.P.); (E.M.); (S.S.)
| | - Emanuela Marcenaro
- Department of Experimental Medicine (DIMES), University of Genoa, 16132 Genoa, Italy; (C.S.); (C.G.); (V.O.); (M.G.); (S.P.); (E.M.); (S.S.)
| | | | | | - Laura Paleari
- A.Li.Sa., Liguria Region Health Authority, 16121 Genoa, Italy;
| | - Andrea DeCensi
- Medical Oncology, Galliera Hospital, 16128 Genoa, Italy; (N.P.); (A.D.)
| | - Simona Sivori
- Department of Experimental Medicine (DIMES), University of Genoa, 16132 Genoa, Italy; (C.S.); (C.G.); (V.O.); (M.G.); (S.P.); (E.M.); (S.S.)
| | - Simona Carlomagno
- Department of Experimental Medicine (DIMES), University of Genoa, 16132 Genoa, Italy; (C.S.); (C.G.); (V.O.); (M.G.); (S.P.); (E.M.); (S.S.)
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Rossi F, Fredericks N, Snowden A, Allegrezza MJ, Moreno-Nieves UY. Next Generation Natural Killer Cells for Cancer Immunotherapy. Front Immunol 2022; 13:886429. [PMID: 35720306 PMCID: PMC9202478 DOI: 10.3389/fimmu.2022.886429] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 04/25/2022] [Indexed: 12/15/2022] Open
Abstract
In recent years, immunotherapy for cancer has become mainstream with several products now authorized for therapeutic use in the clinic and are becoming the standard of care for some malignancies. Chimeric antigen receptor (CAR)-T cell therapies have demonstrated substantial efficacy for the treatment of hematological malignancies; however, they are complex and currently expensive to manufacture, and they can generate life-threatening adverse events such as cytokine release syndrome (CRS). The limitations of current CAR-T cells therapies have spurred an interest in alternative immunotherapy approaches with safer risk profiles and with less restrictive manufacturing constraints. Natural killer (NK) cells are a population of immune effector cells with potent anti-viral and anti-tumor activity; they have the capacity to swiftly recognize and kill cancer cells without the need of prior stimulation. Although NK cells are naturally equipped with cytotoxic potential, a growing body of evidence shows the added benefit of engineering them to better target tumor cells, persist longer in the host, and be fitter to resist the hostile tumor microenvironment (TME). NK-cell-based immunotherapies allow for the development of allogeneic off-the-shelf products, which have the potential to be less expensive and readily available for patients in need. In this review, we will focus on the advances in the development of engineering of NK cells for cancer immunotherapy. We will discuss the sourcing of NK cells, the technologies available to engineer NK cells, current clinical trials utilizing engineered NK cells, advances on the engineering of receptors adapted for NK cells, and stealth approaches to avoid recipient immune responses. We will conclude with comments regarding the next generation of NK cell products, i.e., armored NK cells with enhanced functionality, fitness, tumor-infiltration potential, and with the ability to overcome tumor heterogeneity and immune evasion.
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Affiliation(s)
- Fiorella Rossi
- Janssen Research and Development, LLC, Pharmaceutical Companies of Johnson & Johnson, Spring House, PA, United States
| | - Nathaniel Fredericks
- Janssen Research and Development, LLC, Pharmaceutical Companies of Johnson & Johnson, Spring House, PA, United States
| | - Andrew Snowden
- Janssen Research and Development, LLC, Pharmaceutical Companies of Johnson & Johnson, Spring House, PA, United States
| | - Michael J Allegrezza
- Janssen Research and Development, LLC, Pharmaceutical Companies of Johnson & Johnson, Spring House, PA, United States
| | - Uriel Y Moreno-Nieves
- Janssen Research and Development, LLC, Pharmaceutical Companies of Johnson & Johnson, Spring House, PA, United States
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Raven N, Klaassen M, Madsen T, Thomas F, Hamede R, Ujvari B. Transmissible cancer influences immune gene expression in an endangered marsupial, the Tasmanian devil (Sarcophilus harrisii). Mol Ecol 2022; 31:2293-2311. [PMID: 35202488 PMCID: PMC9310804 DOI: 10.1111/mec.16408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 02/14/2022] [Indexed: 11/28/2022]
Abstract
Understanding the effects of wildlife diseases on populations requires insight into local environmental conditions, host defence mechanisms, host life‐history trade‐offs, pathogen population dynamics, and their interactions. The survival of Tasmanian devils (Sarcophilus harrisii) is challenged by a novel, fitness limiting pathogen, Tasmanian devil facial tumour disease (DFTD), a clonally transmissible, contagious cancer. In order to understand the devils’ capacity to respond to DFTD, it is crucial to gain information on factors influencing the devils’ immune system. By using RT‐qPCR, we investigated how DFTD infection in association with intrinsic (sex and age) and environmental (season) factors influences the expression of 10 immune genes in Tasmanian devil blood. Our study showed that the expression of immune genes (both innate and adaptive) differed across seasons, a pattern that was altered when infected with DFTD. The expression of immunogbulins IgE and IgM:IgG showed downregulation in colder months in DFTD infected animals. We also observed strong positive association between the expression of an innate immune gene, CD16, and DFTD infection. Our results demonstrate that sampling across seasons, age groups and environmental conditions are beneficial when deciphering the complex ecoevolutionary interactions of not only conventional host‐parasite systems, but also of host and diseases with high mortality rates, such as transmissible cancers.
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Affiliation(s)
- N Raven
- Deakin University, Geelong, School of Life and Environmental Sciences, Centre for Integrative Ecology, Waurn Ponds, Vic, 3216, Australia
| | - M Klaassen
- Deakin University, Geelong, School of Life and Environmental Sciences, Centre for Integrative Ecology, Waurn Ponds, Vic, 3216, Australia
| | - T Madsen
- Deakin University, Geelong, School of Life and Environmental Sciences, Centre for Integrative Ecology, Waurn Ponds, Vic, 3216, Australia
| | - F Thomas
- CREEC/CANECEV (CREES), Montpellier, France.,MIVEGEC, Université de Montpellier, CNRS, IRD, Montpellier, France
| | - R Hamede
- Deakin University, Geelong, School of Life and Environmental Sciences, Centre for Integrative Ecology, Waurn Ponds, Vic, 3216, Australia.,School of Natural Sciences, University of Tasmania, Private Bag 55, Hobart, Tasmania, 7001, Australia
| | - B Ujvari
- Deakin University, Geelong, School of Life and Environmental Sciences, Centre for Integrative Ecology, Waurn Ponds, Vic, 3216, Australia
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A Novel off-the-Shelf Trastuzumab-Armed NK Cell Therapy (ACE1702) Using Antibody-Cell-Conjugation Technology. Cancers (Basel) 2021; 13:cancers13112724. [PMID: 34072864 PMCID: PMC8199224 DOI: 10.3390/cancers13112724] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/27/2021] [Accepted: 05/28/2021] [Indexed: 12/25/2022] Open
Abstract
Simple Summary Chimeric antigen receptor T cell therapy has shown its potency against hematologic malignancies in autologous settings but also limited success against solid tumors with severe adverse events, including fatal cases of cytokine releasing syndrome. The aim of this research is to develop a novel off-the-shelf natural killer cell therapy against HER2-expressing cancers using Antibody-Cell Conjugation (ACC) technology and the endogenous CD16-expressing oNK cell line. ACE1702, trastuzumab-armed oNK cells with γ irradiation and cryopreservation, present superior in vitro and in vivo potency against HER2-expressing cancer cells and shows no tumorigenic potential, indicating the clinical application fighting HER2-expressing solid tumors. These findings suggest that ACC technology can be applied to allogeneic immune cells to provide off-the-shelf therapies for cancer patients. Abstract Natural killer (NK) cells harbor efficient cytotoxicity against tumor cells without causing life-threatening cytokine release syndrome (CRS) or graft-versus-host disease (GvHD). When compared to chimeric antigen receptor (CAR) technology, Antibody-Cell Conjugation (ACC) technology has been developed to provide an efficient platform to arm immune cells with cancer-targeting antibodies to recognize and attack cancer cells. Recently, we established an endogenous CD16-expressing oNK cell line (oNK) with a favorable expression pattern of NK activation/inhibitory receptors. In this study, we applied ACC platform to conjugate oNK with trastuzumab and an anti-human epidermal growth factor receptor 2 (HER2) antibody. Trastuzumab-conjugated oNK, ACE-oNK-HER2, executed in vitro and in vivo cytotoxicity against HER2-expressing cancer cells and secretion of IFNγ. The irradiated and cryopreserved ACE-oNK-HER2, designated as ACE1702, retained superior HER2-specific in vitro and in vivo potency with no tumorigenic potential. In conclusion, this study provides the evidence to support the potential clinical application of ACE1702 as a novel off-the-shelf NK cell therapy against HER2-expressing solid tumors.
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