1
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Lee KJ, Choi D, Tae N, Song HW, Kang YW, Lee M, Moon D, Oh Y, Park S, Kim JH, Jeong S, Yang J, Park U, Hong DH, Byun MS, Park SH, Sohn J, Park Y, Im SK, Choi SS, Kim DH, Lee SW. IL-7-primed bystander CD8 tumor-infiltrating lymphocytes optimize the antitumor efficacy of T cell engager immunotherapy. Cell Rep Med 2024:101567. [PMID: 38744277 DOI: 10.1016/j.xcrm.2024.101567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 09/03/2023] [Revised: 02/29/2024] [Accepted: 04/19/2024] [Indexed: 05/16/2024]
Abstract
Bispecific T cell engagers (TCEs) show promising clinical efficacy in blood tumors, but their application to solid tumors remains challenging. Here, we show that Fc-fused IL-7 (rhIL-7-hyFc) changes the intratumoral CD8 T cell landscape, enhancing the efficacy of TCE immunotherapy. rhIL-7-hyFc induces a dramatic increase in CD8 tumor-infiltrating lymphocytes (TILs) in various solid tumors, but the majority of these cells are PD-1-negative tumor non-responsive bystander T cells. However, they are non-exhausted and central memory-phenotype CD8 T cells with high T cell receptor (TCR)-recall capacity that can be triggered by tumor antigen-specific TCEs to acquire tumoricidal activity. Single-cell transcriptome analysis reveals that rhIL-7-hyFc-induced bystander CD8 TILs transform into cycling transitional T cells by TCE redirection with decreased memory markers and increased cytotoxic molecules. Notably, TCE treatment has no major effect on tumor-reactive CD8 TILs. Our results suggest that rhIL-7-hyFc treatment promotes the antitumor efficacy of TCE immunotherapy by increasing TCE-sensitive bystander CD8 TILs in solid tumors.
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Affiliation(s)
- Kun-Joo Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Donghoon Choi
- Research Institute of NeoImmuneTech, Inc., Pohang 37673, Republic of Korea
| | - Nara Tae
- Kangwon Institute of Inclusive Technology, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Ha Won Song
- Division of Biomedical Convergence, College of Biomedical Science, Institute of Bioscience & Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Yeon-Woo Kang
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Minji Lee
- Research Institute of NeoImmuneTech, Inc., Pohang 37673, Republic of Korea
| | - Dain Moon
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Youngsik Oh
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Sujeong Park
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Ji-Hae Kim
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Siheon Jeong
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Jaehyuk Yang
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Uni Park
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Da Hee Hong
- Genexine Inc., Seoul 07789, Republic of Korea
| | - Mi-Sun Byun
- Genexine Inc., Seoul 07789, Republic of Korea
| | - Su-Hyung Park
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Joohyuk Sohn
- Division of Medical Oncology, Department of Internal Medicine, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Yunji Park
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Sun-Kyoung Im
- Research Institute of NeoImmuneTech, Inc., Pohang 37673, Republic of Korea
| | - Sun Shim Choi
- Division of Biomedical Convergence, College of Biomedical Science, Institute of Bioscience & Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea.
| | - Dae Hee Kim
- Kangwon Institute of Inclusive Technology, Kangwon National University, Chuncheon 24341, Republic of Korea; College of Pharmacy, Kangwon National University, Chuncheon 24341, Republic of Korea.
| | - Seung-Woo Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea.
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2
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Kwon DI, Park S, Jeong YL, Kim YM, Min J, Lee C, Choi JA, Choi YH, Kong HJ, Choi Y, Baek S, Lee KJ, Kang YW, Jeong C, You G, Oh Y, Im SK, Song M, Kim JK, Chang J, Choi D, Lee SW. Fc-fused IL-7 provides broad antiviral effects against respiratory virus infections through IL-17A-producing pulmonary innate-like T cells. Cell Rep Med 2024; 5:101362. [PMID: 38232693 PMCID: PMC10829794 DOI: 10.1016/j.xcrm.2023.101362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 10/15/2023] [Accepted: 12/12/2023] [Indexed: 01/19/2024]
Abstract
Repeated pandemics caused by the influenza virus and severe acute respiratory syndrome coronavirus (SARS-CoV) have resulted in serious problems in global public health, emphasizing the need for broad-spectrum antiviral therapeutics against respiratory virus infections. Here, we show the protective effects of long-acting recombinant human interleukin-7 fused with hybrid Fc (rhIL-7-hyFc) against major respiratory viruses, including influenza virus, SARS-CoV-2, and respiratory syncytial virus. Administration of rhIL-7-hyFc in a therapeutic or prophylactic regimen induces substantial antiviral effects. During an influenza A virus (IAV) infection, rhIL-7-hyFc treatment increases pulmonary T cells composed of blood-derived interferon γ (IFNγ)+ conventional T cells and locally expanded IL-17A+ innate-like T cells. Single-cell RNA transcriptomics reveals that rhIL-7-hyFc upregulates antiviral genes in pulmonary T cells and induces clonal expansion of type 17 innate-like T cells. rhIL-7-hyFc-mediated disease prevention is dependent on IL-17A in both IAV- and SARS-CoV-2-infected mice. Collectively, we suggest that rhIL-7-hyFc can be used as a broadly active therapeutic for future respiratory virus pandemic.
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Affiliation(s)
- Dong-Il Kwon
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea
| | - Subin Park
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea
| | - Yujin L Jeong
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea
| | - Young-Min Kim
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea
| | - Jeongyong Min
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea
| | - Changhyung Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea
| | - Jung-Ah Choi
- Science Unit, International Vaccine Institute, Seoul 08826, Republic of Korea
| | - Yoon Ha Choi
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea
| | - Hyun-Jung Kong
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Youngwon Choi
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Seungtae Baek
- Research Institute of NeoImmuneTech Co., Ltd., Pohang 37666, Republic of Korea
| | - Kun-Joo Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea
| | - Yeon-Woo Kang
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea
| | - Chaerim Jeong
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea
| | - Gihoon You
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea
| | - Youngsik Oh
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea
| | - Sun-Kyoung Im
- Research Institute of NeoImmuneTech Co., Ltd., Pohang 37666, Republic of Korea
| | - Manki Song
- Science Unit, International Vaccine Institute, Seoul 08826, Republic of Korea
| | - Jong Kyoung Kim
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea
| | - Jun Chang
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Donghoon Choi
- Research Institute of NeoImmuneTech Co., Ltd., Pohang 37666, Republic of Korea.
| | - Seung-Woo Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37666, Republic of Korea.
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3
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Kang YW, Park S, Lee KJ, Moon D, Kim YM, Lee SW. Understanding the Host Innate Immune Responses against SARS-CoV-2 Infection and COVID-19 Pathogenesis. Immune Netw 2021; 21:e1. [PMID: 33728094 PMCID: PMC7937512 DOI: 10.4110/in.2021.21.e1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 02/16/2021] [Accepted: 02/16/2021] [Indexed: 12/26/2022] Open
Abstract
The emergence of a new severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic has become a significant health concern worldwide. Undoubtedly, a better understanding of the innate and adaptive immune responses against SARS-CoV-2 and its relationship with the coronavirus disease 2019 (COVID-19) pathogenesis will be the sole basis for developing and applying therapeutics. This review will summarize the published results that relate to innate immune responses against infections with human coronaviruses including SARS-CoV-1 and SARS-CoV-2 in both humans and animal models. The topics encompass the innate immune sensing of the virus to the dysregulation of various innate immune cells during infection and disease progression.
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Affiliation(s)
- Yeon-Woo Kang
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Subin Park
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Kun-Joo Lee
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Dain Moon
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Young-Min Kim
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Seung-Woo Lee
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
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You G, Lee Y, Kang YW, Park HW, Park K, Kim H, Kim YM, Kim S, Kim JH, Moon D, Chung H, Son W, Jung UJ, Park E, Lee S, Son YG, Eom J, Won J, Park Y, Jung J, Lee SW. B7-H3×4-1BB bispecific antibody augments antitumor immunity by enhancing terminally differentiated CD8 + tumor-infiltrating lymphocytes. Sci Adv 2021; 7:7/3/eaax3160. [PMID: 33523913 PMCID: PMC7810375 DOI: 10.1126/sciadv.aax3160] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 11/19/2020] [Indexed: 05/17/2023]
Abstract
Cancer immunotherapy with 4-1BB agonists has limited further clinical development because of dose-limiting toxicity. Here, we developed a bispecific antibody (bsAb; B7-H3×4-1BB), targeting human B7-H3 (hB7-H3) and mouse or human 4-1BB, to restrict the 4-1BB stimulation in tumors. B7-H3×m4-1BB elicited a 4-1BB-dependent antitumor response in hB7-H3-overexpressing tumor models without systemic toxicity. BsAb primarily targets CD8 T cells in the tumor and increases their proliferation and cytokine production. Among the CD8 T cell population in the tumor, 4-1BB is solely expressed on PD-1+Tim-3+ "terminally differentiated" subset, and bsAb potentiates these cells for eliminating the tumor. Furthermore, the combination of bsAb and PD-1 blockade synergistically inhibits tumor growth accompanied by further increasing terminally differentiated CD8 T cells. B7-H3×h4-1BB also shows antitumor activity in h4-1BB-expressing mice. Our data suggest that B7-H3×4-1BB is an effective and safe therapeutic agent against B7-H3-positive cancers as monotherapy and combination therapy with PD-1 blockade.
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Affiliation(s)
- Gihoon You
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | | | - Yeon-Woo Kang
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Han Wook Park
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | | | - Hyekang Kim
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Young-Min Kim
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Sora Kim
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Ji-Hae Kim
- Department of Life Sciences, POSTECH, Pohang, Republic of Korea
| | - Dain Moon
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | | | - Wonjun Son
- ABL Bio Inc., Seongnam, Republic of Korea
| | | | | | - Shinai Lee
- ABL Bio Inc., Seongnam, Republic of Korea
| | | | | | | | - Yunji Park
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Jaeho Jung
- ABL Bio Inc., Seongnam, Republic of Korea.
| | - Seung-Woo Lee
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea.
- Department of Life Sciences, POSTECH, Pohang, Republic of Korea
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Kim S, Kim YM, Kim H, Kang YW, Park S, Yang SI, Choi D, Sung YC, Lee SW. Fc-fused IL-7 mobilizes long-term HSCs in a pro-B cell-dependent manner and synergizes with G-CSF and AMD3100. Leukemia 2021; 35:3030-3034. [PMID: 34007048 PMCID: PMC8478653 DOI: 10.1038/s41375-021-01274-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 04/02/2021] [Accepted: 04/29/2021] [Indexed: 02/06/2023]
Affiliation(s)
- Sora Kim
- grid.49100.3c0000 0001 0742 4007Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Young-Min Kim
- grid.49100.3c0000 0001 0742 4007Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Hyekang Kim
- grid.49100.3c0000 0001 0742 4007Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Yeon-Woo Kang
- grid.49100.3c0000 0001 0742 4007Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Subin Park
- grid.49100.3c0000 0001 0742 4007Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Sang-In Yang
- grid.488254.7Genexine, Inc., Seongnam-si, Gyeonggi-do Republic of Korea
| | - Donghoon Choi
- Research Institute of NeoImmunetech, Co., ltd. Bio Open Innovation Center, Pohang, Republic of Korea
| | - Young Chul Sung
- grid.49100.3c0000 0001 0742 4007Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea ,grid.488254.7Genexine, Inc., Seongnam-si, Gyeonggi-do Republic of Korea
| | - Seung-Woo Lee
- grid.49100.3c0000 0001 0742 4007Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea ,grid.49100.3c0000 0001 0742 4007Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang, Republic of Korea
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6
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Kim JH, Kim YM, Choi D, Jo SB, Park HW, Hong SW, Park S, Kim S, Moon S, You G, Kang YW, Park Y, Lee BH, Lee SW. Hybrid Fc-fused interleukin-7 induces an inflamed tumor microenvironment and improves the efficacy of cancer immunotherapy. Clin Transl Immunology 2020; 9:e1168. [PMID: 32994996 PMCID: PMC7507498 DOI: 10.1002/cti2.1168] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 07/07/2020] [Accepted: 08/02/2020] [Indexed: 12/14/2022] Open
Abstract
Objectives Emerging oncotherapeutic strategies require the induction of an immunostimulatory tumor microenvironment (TME) containing numerous tumor‐reactive CD8+ T cells. Interleukin‐7 (IL‐7), a T‐cell homeostatic cytokine, induces an antitumor response; however, the detailed mechanisms underlying the contributions of the IL‐7 to TME remain unclear. Here, we aimed to investigate the mechanism underlying the induction of antitumor response by hybrid Fc‐fused long‐acting recombinant human IL‐7 (rhIL‐7‐hyFc) through regulation of both adaptive and innate immune cells in the TME. Methods We evaluated rhIL‐7‐hyFc‐mediated antitumor responses in murine syngeneic tumor models. We analysed the cellular and molecular features of tumor‐infiltrating lymphocytes (TILs) and changes in the TME after rhIL‐7‐hyFc treatment. Furthermore, we evaluated the antitumor efficacy of rhIL‐7‐hyFc combined with chemotherapy and checkpoint inhibitors (CPIs). Results Systemic delivery of rhIL‐7‐hyFc induced significant therapeutic benefits by expanding CD8+ T cells with enhanced tumor tropism. In tumors, rhIL‐7‐hyFc increased both tumor‐reactive and bystander CD8+ TILs, all of which displayed enhanced effector functions but less exhausted phenotypes. Moreover, rhIL‐7‐hyFc suppressed the generation of immunosuppressive myeloid cells in the bone marrow of tumor‐bearing mice, resulting in the immunostimulatory TME. Combination therapy with chemotherapy and CPIs, rhIL‐7‐hyFc elicited a strong antitumor response and even under a T lymphopenic condition by restoring CD8+ T cells. When combined with chemotherapy and CPIs, rhIL‐7‐hyFc administration enhanced antitumor response under intact andlymphopenic conditions by restoring CD8+ T cells. Conclusion Taken together, these data demonstrate that rhIL‐7‐hyFc induces antitumor responses by generating T‐cell‐inflamed TME and provide a preclinical proof of concept of immunotherapy with rhIL‐7‐hyFc to enhance therapeutic responses in the clinic.
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Affiliation(s)
- Ji-Hae Kim
- Laboratory of Cellular Immunology Department of Life Sciences Pohang University of Science and Technology Pohang Korea
| | - Young-Min Kim
- Laboratory of Cellular Immunology Department of Life Sciences Pohang University of Science and Technology Pohang Korea
| | - Donghoon Choi
- Research Institute of NeoImmuneTech, Inc. Rockville MD USA
| | - Saet-Byeol Jo
- Laboratory of Cellular Immunology Division of Integrative Biosciences and Biotechnology Pohang University of Science and Technology Pohang Korea
| | - Han Wook Park
- Laboratory of Cellular Immunology Division of Integrative Biosciences and Biotechnology Pohang University of Science and Technology Pohang Korea
| | - Sung-Wook Hong
- Laboratory of T Cell Biology Division of Integrative Biosciences and Biotechnology Pohang University of Science and Technology Pohang Korea.,Department of Microbiology and Immunology Center for Immunology University of Minnesota Medical School Minneapolis MN USA
| | - Sujeong Park
- Laboratory of Cellular Immunology Division of Integrative Biosciences and Biotechnology Pohang University of Science and Technology Pohang Korea
| | - Sora Kim
- Laboratory of Cellular Immunology Division of Integrative Biosciences and Biotechnology Pohang University of Science and Technology Pohang Korea
| | - Sookjin Moon
- Laboratory of Cellular Immunology Division of Integrative Biosciences and Biotechnology Pohang University of Science and Technology Pohang Korea
| | - Gihoon You
- Laboratory of Cellular Immunology Division of Integrative Biosciences and Biotechnology Pohang University of Science and Technology Pohang Korea
| | - Yeon-Woo Kang
- Laboratory of Cellular Immunology Division of Integrative Biosciences and Biotechnology Pohang University of Science and Technology Pohang Korea
| | - Yunji Park
- Laboratory of Cellular Immunology Division of Integrative Biosciences and Biotechnology Pohang University of Science and Technology Pohang Korea
| | - Byung Ha Lee
- Research Institute of NeoImmuneTech, Inc. Rockville MD USA
| | - Seung-Woo Lee
- Laboratory of Cellular Immunology Department of Life Sciences Pohang University of Science and Technology Pohang Korea.,Laboratory of Cellular Immunology Division of Integrative Biosciences and Biotechnology Pohang University of Science and Technology Pohang Korea
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7
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You G, Lee Y, Kang YW, Park HW, Park K, Jung J, Lee SW. Abstract 6673: B7-H3-targeted 4-1BB activation potentiates CD8 T cell-dependent antitumor immunity without systemic toxicity. Cancer Res 2020. [DOI: 10.1158/1538-7445.am2020-6673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
4-1BB is a costimulatory receptor on activated T and NK cells, and the stimulation of 4-1BB by the natural ligand or agonistic mAb enhances cellular proliferation and effector functions. Immunotherapy targeting 4-1BB has been tested for cancer patients; however, dose-limiting toxicities of 4-1BB agonists restrict further clinical development. B7-H3 (CD276) is overexpressed on the cell surface of multiple cancers and tumor-associated endothelial cells, yet barely on healthy adult tissues. To restrict 4-1BB stimulation activity in tumors, we have developed an FcγR-binding null bispecific IgG1 antibody consisting of B7-H3-targeting IgG and two anti-4-1BB single-chain variable fragments. The B7-H3x4-1BB bispecific antibody (B5x1D8) shows a potent in vitro T cell costimulatory activity in the presence of B7-H3 on the tumor cells. B5x1D8 rapidly accumulates in B7-H3-overexpressing tumors compared to 4-1BB agonistic mAb. B5x1D8 elicits a 4-1BB-dependent anti-tumor response in three different B7-H3-overexpressing murine tumor models. More importantly, in contrast to 4-1BB mAb, B5x1D8 does not induce any observable systemic abnormalities. Treatment of B5x1D8 increases the density, cytokine production, and proliferation of CD8 T cells in the tumor. Characterization of TILs indicates that B5x1D8 increases the number of PD-1+TIM-3+ “terminal effector” CD8 T cells for eliminating tumor cells. Furthermore, a combination of B5x1D8 and immune checkpoint blockade (ICB), anti-PD1, synergistically inhibits tumor growth. The human 4-1BB-targeting bispecific antibody also induces B7-H3-dependent 4-1BB costimulation and inhibits tumor growth in human 4-1BB transgenic mice. In sum, our data suggest that the B7-H3x4-1BB bispecific antibody represents an alternative form of IgG-based 4-1BB agonistic mAb for effective and safe cancer immunotherapy against B7-H3 positive cancers as monotherapy and combination therapy with other immunotherapy, like ICB.
Citation Format: Gihoon You, Yangsoon Lee, Yeon-Woo Kang, Han Wook Park, Kyeongsu Park, Jaeho Jung, Seung-Woo Lee. B7-H3-targeted 4-1BB activation potentiates CD8 T cell-dependent antitumor immunity without systemic toxicity [abstract]. In: Proceedings of the Annual Meeting of the American Association for Cancer Research 2020; 2020 Apr 27-28 and Jun 22-24. Philadelphia (PA): AACR; Cancer Res 2020;80(16 Suppl):Abstract nr 6673.
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8
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Stockli MP, Han BX, Hardek TW, Kang YW, Murray SN, Pennisi TR, Piller C, Santana M, Welton R. Producing persistent, high-current, high-duty-factor H- beams for routine 1 MW operation of Spallation Neutron Source (invited). Rev Sci Instrum 2012; 83:02A732. [PMID: 22380241 DOI: 10.1063/1.3681921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Since 2009, the Spallation Neutron Source (SNS) has been producing neutrons with ion beam powers near 1 MW, which requires the extraction of ∼50 mA H(-) ions from the ion source with a ∼5% duty factor. The 50 mA are achieved after an initial dose of ∼3 mg of Cs and heating the Cs collar to ∼170 °C. The 50 mA normally persist for the entire 4-week source service cycles. Fundamental processes are reviewed to elucidate the persistence of the SNS H(-) beams without a steady feed of Cs and why the Cs collar temperature may have to be kept near 170 °C.
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Affiliation(s)
- Martin P Stockli
- Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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9
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Yang JK, Kim YS, Kim KI, Koo HS, Kim SM, Lee TH, Im EH, Huh KC, Choi YW, Kang YW, Kwon SJ. A case of esophageal and endobronchial anthracosis. Endoscopy 2010; 42 Suppl 2:E150-1. [PMID: 20486083 DOI: 10.1055/s-0029-1215417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- J K Yang
- Department of Gastroenterology, Konyang University College of Medicine, Daejeon, Korea
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10
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Kang YW, Fuja R, Goulding RH, Hardek T, Lee SW, McCarthy MP, Piller MC, Shin K, Stockli MP, Welton RF. rf improvements for Spallation Neutron Source H- ion source. Rev Sci Instrum 2010; 81:02A725. [PMID: 20192394 DOI: 10.1063/1.3277187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The Spallation Neutron Source at Oak Ridge National Laboratory is ramping up the accelerated proton beam power to 1.4 MW and just reached 1 MW. The rf-driven multicusp ion source that originates from the Lawrence Berkeley National Laboratory has been delivering approximately 38 mA H(-) beam in the linac at 60 Hz, 0.9 ms. To improve availability, a rf-driven external antenna multicusp ion source with a water-cooled ceramic aluminum nitride (AlN) plasma chamber is developed. Computer modeling and simulations have been made to analyze and optimize the rf performance of the new ion source. Operational statistics and test runs with up to 56 mA medium energy beam transport beam current identify the 2 MHz rf system as a limiting factor in the system availability and beam production. Plasma ignition system is under development by using a separate 13 MHz system. To improve the availability of the rf power system with easier maintenance, we tested a 70 kV isolation transformer for the 80 kW, 6% duty cycle 2 MHz amplifier to power the ion source from a grounded solid-state amplifier.
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Affiliation(s)
- Y W Kang
- Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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Lee SW, Goulding RH, Kang YW, Shin K, Welton RF. Computer simulations for rf design of a Spallation Neutron Source external antenna H- ion source. Rev Sci Instrum 2010; 81:02A726. [PMID: 20192395 DOI: 10.1063/1.3279304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Electromagnetic modeling of the multicusp external antenna H(-) ion source for the Spallation Neutron Source (SNS) has been performed in order to optimize high-power performance. During development of the SNS external antenna ion source, antenna failures due to high voltage and multicusp magnet holder rf heating concerns under stressful operating conditions led to rf characteristics analysis. In rf simulations, the plasma was modeled as an equivalent lossy metal by defining conductivity as sigma. Insulation designs along with material selections such as ferrite and Teflon could be included in the computer simulations to compare antenna gap potentials, surface power dissipations, and input impedance at the operating frequencies, 2 and 13.56 MHz. Further modeling and design improvements are outlined in the conclusion.
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Affiliation(s)
- S W Lee
- Spallation Neutron Source, ORNL, Oak Ridge, Tennessee 37831, USA.
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Huh KC, Lee TH, Kim SM, Im EH, Choi YW, Kim BK, Jung DJ, Choi WJ, Kang YW. Intussuscepted sigmoid colonic lipoma mimicking carcinoma. Dig Dis Sci 2006; 51:791-5. [PMID: 16615005 DOI: 10.1007/s10620-006-3208-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2005] [Accepted: 04/04/2005] [Indexed: 02/08/2023]
Affiliation(s)
- K C Huh
- Department of Internal Medicine, Konyang University College of Medicine, Daejeon, Korea.
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Abstract
We report a rare case of deciduoid peritoneal mesothelioma in a 47-year-old woman who had no history of asbestos exposure or previous surgery. Immunohistochemistry and electron microscopic findings showed that the tumor was a subtype of epithelioid mesothelioma. Awareness of this disease entity is helpful for the differential diagnosis of peritoneal masses.
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Affiliation(s)
- D J Chung
- Department of Radiology, University of Konyang College of Medicine, 685 Gasuwon-dong, Seo-gu, Daejeon 302-718, Korea
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14
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Cho WH, Kim IH, Lim TJ, Kang YW, Hur JW, Ahn SH, Park KK. Serum cholesterol level as an indicator of allograft liver function. Transplant Proc 1996; 28:1671-2. [PMID: 8658832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- W H Cho
- Department of Surgery, Keimyung University School of Medicine, Taegu, Korea
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Abstract
BACKGROUND Nonspecific esophageal motility disorder (NEMD) has become a catchall term to describe abnormal esophageal manometric findings that do not meet strict criteria for established esophageal motility disorders. The aim of this study was to determine whether NEMD is a real esophageal motility disorder characterized by impairment of its motor function or simply a manometric disturbance with no clinical consequences. METHODS Esophageal transit of liquid and semisolids was studied using radioscintigraphic techniques in 10 symptomatic patients with manometrically diagnosed NEMD, 26 healthy control subjects, and 40 disease control subjects. The disease controls included 24 patients with achalasia, 9 with scleroderma, and 7 with diffuse esophageal spasm. RESULTS Patients with NEMD had no impairment of liquid emptying compared with healthy controls. Liquid emptying was markedly delayed in patients with achalasia and scleroderma. However, semisolid emptying was markedly delayed in patients with NEMD compared with healthy controls (P < 0.001), and the extent of its delayed emptying was similar to that seen in patients with achalasia, scleroderma, and diffuse esophageal spasm. CONCLUSIONS NEMD is not a manometric curiosity but a disorder characterized by selective impairment of semisolid emptying.
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Affiliation(s)
- J J Hsu
- Division of Gastroenterology, Mayo Clinic, Rochester, Minnesota
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16
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Her Y, Kang YW, Jung HS, Park YH. Phylogenetic position of Trimorphomyces papilionaceus based on 5S rRNA sequence. Nucleic Acids Res 1992; 20:5229. [PMID: 1408840 PMCID: PMC334313 DOI: 10.1093/nar/20.19.5229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Affiliation(s)
- Y Her
- Department of Microbiology, College of Natural Sciences, Seoul National University, Korea
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17
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Abstract
A method of correcting for the RF inhomogeneity in the body by dielectric loading of the coil-to-shield space in an RF resonator (coil and shield assembly) is described. The presence of the RF coil and RF shield have significant effects on RF homogeneity. Based on theoretical calculations, a method for adjusting the RF homogeneity by manipulating the axial propagation constant, kappa z, is proposed. This is accomplished by loading the coil-to-shield space with dielectric material of suitable relative permittivity so as to increase kappa z and decrease the radial propagation constant, kappa rho. In this manner, the radial wavelength (lambda rho = 2 pi/kappa rho) can be increased relative to the body dimensions, and the field amplitude variations in the axial plane minimized. Theoretical calculations indicate that a value of between 30 and 40 for the relative permittivity of the dielectric material in the coil-to-shield space would reduce the RF field inhomogeneity from +/- 15% to about +/- 3% over a central 30-cm-diameter region of a homogeneous 40-cm-diameter body at both 64 and 170 MHz. The theoretical model was verified in laboratory measurements of the [formula; see text] field generated in a test coil at 170 MHz which was scaled to correspond to a body at 64 MHz. However, the improved RF field homogeneity would be accompanied by increased RF power requirements and reduced coil sensitivity.
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Affiliation(s)
- T K Foo
- Department of Medical Physics, University of Wisconsin Madison 53706
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Abstract
Impairment of gastrointestinal motility is common among patients with chronic dyspepsia. Gastroparesis can lead to devastating clinical consequences including malnutrition, weight loss, metabolic acidosis and psychological dysfunction. In this article, the current concepts of gastric motor function are reviewed and the diagnostic and treatment modalities of gastroparesis are discussed in detail.
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Affiliation(s)
- Y W Kang
- Division of Gastroenterology and Internal Medicine, Mayo Clinic, Rochester, MN 55905
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Abstract
A closed form, analytical solution describing the RF fields generated by an RF body coil resonator for MR imaging at 1.5 and 4.0 T is presented. This solution extends the results of earlier studies of RF penetration in the body by explicitly including the RF coil, the RF shield, and the field variation along the z axis for high-pass bird cage coils. A salient feature of this treatment is the calculation of the axial propagation constant, kz, which determines the z dependence of the RF field. We have determined the relative power deposition in the body, the B1 field homogeneity, and coil losses, which are functions of the coil-to-shield separation and body size. The relative power deposition in the body has been calculated to vary as the 1.58 power of the body radius. The calculations have also predicted that the field homogeneity in the z direction exhibits greater degradation at higher frequencies in a high-pass coil than in a low-pass coil. The model predicts an increase in coil losses by a factor of 2.8 as the coil-to-shield separation is reduced from 5 to 2 cm in a standard body resonator. Although the results for only a homogeneous cylindrical object or body are presented, the theory can be extended to a multilayered heterogeneous object of varying permittivity and conductivity.
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Affiliation(s)
- T K Foo
- Department of Medical Physics, University of Wisconsin, Madison 53706
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20
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Abstract
Saccharomyces cerevisiae strain FF1210-6C/170 is respiratory deficient due to a mutation of the penultimate base of the mitochondrial tRNA(Asp) gene. We have identified a number of progeny from this strain which have reverted to respiratory sufficiency by the excision and tandem amplification of a small region of the mitochondrial (mt) DNA carrying the tRNA(Asp) gene, while also maintaining the full-length mtDNA. We have studied the structure of the mtDNA and mitochondrial transcription in a number of these heteroplasmic strains. The exact site of the recombination involved in the excision of the repeating unit of the amplified mtDNA has been determined for five of the revertants. Recombination occurs between identical sequences 4-13 base pairs in length. Each of the different repeating units of the amplified DNA retains an active promoter which has been moved to a site just upstream of the tRNA(Asp) gene by the excision/amplification. Transcripts from the heteroplasmic strains have been characterized to determine the sites of mitochondrial RNA termini. We find that in addition to the 5' and 3' processing of the tRNAs, many of the transcripts terminate at a position about 300 base pairs downstream of the gene for tRNA(Asp). We also find that 3' processing of tRNA(Asp) precursors is absent in petite strains which lack 5' processing indicating that 5' processing of tRNA(Asp) may be a prerequisite for 3' processing in this mutant.
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MESH Headings
- Base Sequence
- Blotting, Northern
- DNA, Fungal/genetics
- DNA, Mitochondrial/genetics
- Gene Amplification
- Genes, Fungal
- Mitochondria
- Molecular Sequence Data
- Mutation
- Oxygen/metabolism
- Plasmids
- RNA/genetics
- RNA, Fungal/genetics
- RNA, Mitochondrial
- RNA, Transfer, Asp/genetics
- Recombination, Genetic
- Saccharomyces cerevisiae/genetics
- Transcription, Genetic
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Affiliation(s)
- Y W Kang
- Biology Program, University of Texas, Richardson 75083-0688
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Abstract
We isolated revertants capable of respiration from the respiratory deficient yeast mutant, FF1210-6C/170, which displays greatly decreased mitochondrial protein synthesis due to a single base substitution at the penultimate base of the tRNAAsp gene on mitochondrial (mt) DNA. Three classical types of revertant were identified: (1) same-site revertants; (2) intragenic revertants which restore the base pairing in the acceptor stem of the mitochondrial tRNAAsp; and (3) extragenic suppressors located in nuclear DNA. In addition a fourth type of revertant was identified in which the mutant tRNAAsp is amplified due to the maintenance of both the original mutant mtDNA and a modified form of the mutant mtDNA in which only a small region around the tRNAAsp gene is retained and amplified. The latter form resembles the mtDNA in vegetative petite (rho-) strains which normally segregates rapidly from the wild-type mtDNA. Each revertant type was characterized genetically and by both DNA sequence analysis of the mitochondrial tRNAAsp gene and analysis of the quantity and size of RNA containing the tRNAAsp sequence. These results indicate that the mitochondrial tRNAAsp of the mutant retains a low level of activity and that the presence of the terminal base pair in tRNAAsp is a determinant of both tRNAAsp function and the maintenance of wild-type levels of tRNAAsp.
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Affiliation(s)
- Y W Kang
- Biology Programs, University of Texas at Dallas, Richardson 75083-0688
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Abstract
A case with some components of Cronkhite-Canada syndrome such as onycholdystrophy, a large amount of diarrhea, hypoproteinemia and hypoalbuminemia in a 16 year-old man with Peutz-Jeghers syndrome was studied. His family members were conirmed to have Peutz-Jeghers syndrome by biopsy of polyps in the rectum and duodenum. This is the first case report of Peutz-Jeghers syndrome associated with some components of Cronkhite-Canada syndrome.
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