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Ryou JH, Lee G, Taniguchi T, Yanai H, Hangai S. Abstract 242: TCTP is a target for cancer immunotherapy modulating myeloid-derived suppressor cells. Cancer Res 2022. [DOI: 10.1158/1538-7445.am2022-242] [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
Myeloid-derived suppressor cells (MDSCs) are a heterogenous group of myeloid cells that are highly suppressive to antitumor lymphocyte function and trafficking to the tumor. The accumulation of MDSCs in the tumor immune microenvironment (TIME) makes immunosuppressive TIME and progressive tumor. In fact, despite notable clinical outcomes in cancer immunotherapy, many patients are refractory or relapsed to immune checkpoint inhibitor therapy, wherein obstacles imposed by TIME contribute to a great extent. Here, we show that translationally controlled tumor protein (TCTP) released by dying tumor cells is an immunomodulator crucial to full-blown MDSC accumulation in the TIME in mouse models. We provide evidence that extracellular TCTP mediates recruitment of the polymorphonuclear MDSC (PMN-MDSC) population in the TIME, which is Toll-like receptor-2 (TLR2) dependent. For human translation, we confirmed that human TCTP binds directly to human TLR2 extracellular domain and stimulates human PBMC to produce multiple cytokines. To explore therapeutic applicability, we generated anti-TCTP antibodies for TCTP inhibition. The antibodies successfully neutralized TCTP in molecular and cellular level. The antibodies also suppressed PMN-MDSC accumulation and tumor growth. The combination of anti-TCTP antibody and immune checkpoint inhibitor showed synergistic effect on tumor growth inhibition. In conclusion, extracellular TCTP is an immunomodulator recruiting PMN-MDSCs to TIME. When TCTP is removed or neutralized, PMN-MDSC counts in TIME decreased. Anti-TCTP therapy may offer a new immunotherapy strategy.
Citation Format: Jeong-Hyun Ryou, Gwanghee Lee, Tadatsugu Taniguchi, Hideyuki Yanai, Sho Hangai. TCTP is a target for cancer immunotherapy modulating myeloid-derived suppressor cells [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 242.
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Ryou JH, Sohn YK, Kim DG, Kyeong HH, Kim HS. Engineering and cytosolic delivery of a native regulatory protein and its variants for modulation of ERK2 signaling pathway. Biotechnol Bioeng 2018; 115:839-849. [PMID: 29240226 DOI: 10.1002/bit.26516] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 08/10/2017] [Revised: 10/30/2017] [Accepted: 12/04/2017] [Indexed: 12/24/2022]
Abstract
The modulation of a cell signaling process using a molecular binder followed by an analysis of the cellular response is crucial for understanding its role in the cellular function and developing pharmaceuticals. Herein, we present the modulation of the ERK2-mediated signaling pathway through the cytosolic delivery of a native regulatory protein for ERK2, that is, PEA-15 (phosphoprotein enriched in astrocytes, 15 kDa), and its engineered variants using a bacterial toxin-based delivery system. Based on biochemical and structural analyses, PEA-15 variants with different phosphorylation sites and a high affinity for ERK2 were designed. Semi-rational approach led to about an 830-fold increase in the binding affinity of PEA-15, resulting in more effective modulation of the ERK2-mediated signaling. Our approach enabled an understanding of the cellular function of the ERK2-mediated signaling process and the effect of PEA-15 phosphorylation on its action as an ERK2 blocker. We demonstrated the utility and potential of our approach by showing an efficient cytosolic delivery of these PEA-15 variants and the effective suppression of cell proliferation through the inhibition of the ERK2 function. The present approach can be used broadly for modulating the cell signaling processes and understanding their roles in cellular function, as well as for the development of therapeutics.
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Affiliation(s)
- Jeong-Hyun Ryou
- Graduate School of Medical Science & Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
| | - Yoo-Kyoung Sohn
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
| | - Dong-Gun Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
| | - Hyun-Ho Kyeong
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
| | - Hak-Sung Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
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Kim HY, Kang JA, Ryou JH, Lee GH, Choi DS, Lee DE, Kim HS. Intracellular Protein Delivery System Using a Target-Specific Repebody and Translocation Domain of Bacterial Exotoxin. ACS Chem Biol 2017; 12:2891-2897. [PMID: 29019389 DOI: 10.1021/acschembio.7b00562] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
With the high efficacy of protein-based therapeutics and plenty of intracellular drug targets, cytosolic protein delivery in a cell-specific manner has attracted considerable attention in the field of precision medicine. Herein, we present an intracellular protein delivery system based on a target-specific repebody and the translocation domain of Pseudomonas aeruginosa exotoxin A. The delivery platform was constructed by genetically fusing an EGFR-specific repebody as a targeting moiety to the translocation domain, while a protein cargo was fused to the C-terminal end of the delivery platform. The delivery platform was revealed to efficiently translocate a protein cargo to the cytosol in a target-specific manner. We demonstrate the utility and potential of the delivery platform by showing a remarkable tumor regression with negligible toxicity in a xenograft mice model when gelonin was used as the cytotoxic protein cargo. The present platform can find wide applications to the cell-selective cytosolic delivery of diverse proteins in many areas.
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Affiliation(s)
- Hee-Yeon Kim
- Graduate School of Nanoscience and Technology (WCU), Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| | - Jung Ae Kang
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute , 29 Geumgu-gil, Jeongeup-si, Jeollabuk-do 580-185, Korea
| | - Jeong-Hyun Ryou
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| | - Gyeong Hee Lee
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute , 29 Geumgu-gil, Jeongeup-si, Jeollabuk-do 580-185, Korea
| | - Dae Seong Choi
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute , 29 Geumgu-gil, Jeongeup-si, Jeollabuk-do 580-185, Korea
| | - Dong Eun Lee
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute , 29 Geumgu-gil, Jeongeup-si, Jeollabuk-do 580-185, Korea
| | - Hak-Sung Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
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Ryou JH, Sohn YK, Hwang DE, Park WY, Kim N, Heo WD, Kim MY, Kim HS. Engineering of bacterial exotoxins for highly efficient and receptor-specific intracellular delivery of diverse cargos. Biotechnol Bioeng 2016; 113:1639-46. [PMID: 26773973 DOI: 10.1002/bit.25935] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [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: 10/02/2015] [Accepted: 01/14/2016] [Indexed: 01/27/2023]
Abstract
The intracellular delivery of proteins with high efficiency in a receptor-specific manner is of great significance in molecular medicine and biotechnology, but remains a challenge. Herein, we present the development of a highly efficient and receptor-specific delivery platform for protein cargos by combining the receptor binding domain of Escherichia coli Shiga-like toxin and the translocation domain of Pseudomonas aeruginosa exotoxin A. We demonstrated the utility and efficiency of the delivery platform by showing a cytosolic delivery of diverse proteins both in vitro and in vivo in a receptor-specific manner. In particular, the delivery system was shown to be effective for targeting an intracellular protein and consequently suppressing the tumor growth in xenograft mice. The present platform can be widely used for intracellular delivery of diverse functional macromolecules with high efficiency in a receptor-specific manner. Biotechnol. Bioeng. 2016;113: 1639-1646. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Jeong-Hyun Ryou
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| | - Yoo-Kyoung Sohn
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| | - Da-Eun Hwang
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| | - Woo-Yong Park
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| | - Nury Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| | - Won-Do Heo
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| | - Mi-Young Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| | - Hak-Sung Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea.
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Hwang DE, Ryou JH, Oh JR, Han JW, Park TK, Kim HS. Anti-Human VEGF Repebody Effectively Suppresses Choroidal Neovascularization and Vascular Leakage. PLoS One 2016; 11:e0152522. [PMID: 27015541 PMCID: PMC4807815 DOI: 10.1371/journal.pone.0152522] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 03/15/2016] [Indexed: 12/27/2022] Open
Abstract
Age-related macular degeneration (AMD) is the leading cause of vision loss and blindness among people over the age of 60. Vascular endothelial growth factor (VEGF) plays a major role in pathological angiogenesis in AMD. Herein, we present the development of an anti- human VEGF repebody, which is a small-sized protein binder consisting of leucine-rich repeat (LRR) modules. The anti-VEGF repebody selected through a phage-display was shown to have a high affinity and specificity for human VEGF. We demonstrate that this repebody effectively inhibits in vitro angiogenic cellular processes, such as proliferation and migration, by blocking the VEGF-mediated signaling pathway. The repebody was also shown to have a strong suppression effect on choroidal neovascularization (CNV) and vascular leakage in vivo. Our results indicate that the anti-VEGF repebody has a therapeutic potential for treating neovascular AMD as well as other VEGF-involved diseases including diabetic retinopathy and metastatic cancers.
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Affiliation(s)
- Da-Eun Hwang
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305–701, Korea
| | - Jeong-Hyun Ryou
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305–701, Korea
- Graduate School of Medical Science & Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305–701, Korea
| | - Jong Rok Oh
- Department of Ophthalmology, Soonchunhyang University, College of Medicine, Bucheon Hospital, Bucheon, Korea
| | - Jung Woo Han
- Department of Ophthalmology, Soonchunhyang University, College of Medicine, Bucheon Hospital, Bucheon, Korea
| | - Tae Kwann Park
- Department of Ophthalmology, Soonchunhyang University, College of Medicine, Bucheon Hospital, Bucheon, Korea
| | - Hak-Sung Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305–701, Korea
- * E-mail:
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Ryou JH, Sohn YK, Hwang DE, Kim HS. Shiga-like toxin-based high-efficiency and receptor-specific intracellular delivery system for a protein. Biochem Biophys Res Commun 2015. [PMID: 26220340 DOI: 10.1016/j.bbrc.2015.07.122] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The cell-specific cytosolic delivery of functional macromolecules with high efficiency is of great significance in molecular medicine and biotechnology. Herein, we present a Shiga-like toxin II-based high-efficiency and receptor-specific intracellular delivery system. We designed and constructed the Shiga-like toxin-based carrier (STC) to comprise the targeting and translocation domains, and used it for delivering a protein cargo. The STC was shown to deliver a protein cargo into the cytosol with high efficiency in a receptor-specific manner, exhibiting much higher efficiency than the most widely used cell-penetrating peptide. The general utility of the STC was demonstrated by modulating the targeting domain. The present delivery platform can be widely used for the intracellular delivery of diverse biomolecules in a receptor-specific and genetically encodable manner.
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Affiliation(s)
- Jeong-Hyun Ryou
- Graduate School of Medical Science & Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea; Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea
| | - Yoo-Kyoung Sohn
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea
| | - Da-Eun Hwang
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea
| | - Hak-Sung Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea.
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Ryou JH, Park K, Lee JJ, Kim D, Kim HS. Soluble expression of human glycoprotein Ibα in Escherichia coli through replacement of the N-terminal capping domain. Protein Expr Purif 2014; 101:21-7. [PMID: 24925643 DOI: 10.1016/j.pep.2014.06.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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: 04/05/2014] [Revised: 05/29/2014] [Accepted: 06/01/2014] [Indexed: 11/27/2022]
Abstract
Glycoprotein Ibα (GpIbα), a family of LRR (leucine-rich repeat) proteins, is a membrane protein on the platelet, and plays an important role in atherothrombotic events. The complex formation of GpIbα with the von Willebrand Factor (vWF) has been revealed to lead to acute coronary syndrome (ACS) or stroke. A considerable attention has been paid to understand the biological functions of GpIbα and its regulation. However, difficulty with the soluble expression of human GpIbα in bacteria has hampered the relevant research. Herein, we present a soluble expression of GpIbα in Escherichiacoli by replacing the N-terminal capping domain of GpIbα with that of Internalin B using a computational approach. The resulting protein was expressed as a soluble form in E. coli, maintaining its structural feature and binding property for vWF. The present approach can be broadly used for the soluble expression of human LRR proteins in E. coli.
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Affiliation(s)
- Jeong-Hyun Ryou
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 373-1, Guseong-Dong, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Keunwan Park
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 373-1, Guseong-Dong, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Joong-Jae Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 373-1, Guseong-Dong, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Dongsup Kim
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 373-1, Guseong-Dong, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Hak-Sung Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 373-1, Guseong-Dong, Yuseong-gu, Daejeon 305-701, Republic of Korea.
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Ryou JH, Lee SJ, Park YM, Kim HO, Kim HS. Acne-photodynamic therapy with intra-lesional injection of 5-aminolevulinic acid. Photodermatol Photoimmunol Photomed 2009; 25:57-8. [PMID: 19152520 DOI: 10.1111/j.1600-0781.2009.00399.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Photodynamic therapy (PDT) is a treatment option for acne patients who fail to respond to conventional therapy. Although potent, we experience side effects such as erythema, exfoliation and dyspigmentation. In attempt to specify treatment and shorten the incubation time, we injected 5-aminolevulinic acid (ALA) to the individual lesion. The results of intralesional injection ILI-PDT and conventional PDT are compared in this study.
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Affiliation(s)
- J H Ryou
- Anacli Clinic, Seoul, South Korea
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Abstract
Atypical variants of cellular blue nevus are considered to have features intermediate between typical cellular blue nevus and rare malignant blue nevus; they usually show bizarre pleomorphic cells which have prominent nucleoli. We describe a 37-year-old-Korean woman who had had an asymptomatic pedunculated single mass on her right thigh for 17 years. A skin biopsy showed a tumor consisting of intensely pigmented dendritic cells and less or nonpigmented epitheloid cells in the dermis with striking atypia. There has been no evidence of recurrence for 3 years after surgery. The diagnosis of atypical cellular blue nevus was made on the basis of clinical features and skin biopsy findings.
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Affiliation(s)
- J H Ryou
- Department of Dermatology, College of Medicine, Kyunghee University, Hoeki-Dong, Dongdaemun-Ku, Seoul 130-702, Korea
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