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Yuki Y, Kurokawa S, Sugiura K, Kashima K, Maruyama S, Yamanoue T, Honma A, Mejima M, Takeyama N, Kuroda M, Kozuka-Hata H, Oyama M, Masumura T, Nakahashi-Ouchida R, Fujihashi K, Hiraizumi T, Goto E, Kiyono H. MucoRice-CTB line 19A, a new marker-free transgenic rice-based cholera vaccine produced in an LED-based hydroponic system. FRONTIERS IN PLANT SCIENCE 2024; 15:1342662. [PMID: 38559768 PMCID: PMC10978600 DOI: 10.3389/fpls.2024.1342662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 03/04/2024] [Indexed: 04/04/2024]
Abstract
We previously established the selection-marker-free rice-based oral cholera vaccine (MucoRice-CTB) line 51A for human use by Agrobacterium-mediated co-transformation and conducted a double-blind, randomized, placebo-controlled phase I trial in Japan and the United States. Although MucoRice-CTB 51A was acceptably safe and well tolerated by healthy Japanese and U.S. subjects and induced CTB-specific antibodies neutralizing cholera toxin secreted by Vibrio cholerae, we were limited to a 6-g cohort in the U.S. trial because of insufficient production of MucoRice-CTB. Since MucoRice-CTB 51A did not grow in sunlight, we re-examined the previously established marker-free lines and selected MucoRice-CTB line 19A. Southern blot analysis of line 19A showed a single copy of the CTB gene. We resequenced the whole genome and detected the transgene in an intergenic region in chromosome 1. After establishing a master seed bank of MucoRice-CTB line 19A, we established a hydroponic production facility with LED lighting to reduce electricity consumption and to increase production capacity for clinical trials. Shotgun MS/MS proteomics analysis of MucoRice-CTB 19A showed low levels of α-amylase/trypsin inhibitor-like proteins (major rice allergens), which was consistent with the data for line 51A. We also demonstrated that MucoRice-CTB 19A had high oral immunogenicity and induced protective immunity against cholera toxin challenge in mice. These results indicate that MucoRice-CTB 19A is a suitable oral cholera vaccine candidate for Phase I and II clinical trials in humans, including a V. cholerae challenge study.
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Affiliation(s)
- Yoshikazu Yuki
- Division of Mucosal Immunology, IMSUT Distinguished Professor Unit, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- R&D department, HanaVax Inc., Chiba, Japan
- Department of Human Mucosal Vaccinology, Chiba University Hospital, Chiba, Japan
| | - Shiho Kurokawa
- Division of Mucosal Immunology, IMSUT Distinguished Professor Unit, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Department of Human Mucosal Vaccinology, Chiba University Hospital, Chiba, Japan
| | - Kotomi Sugiura
- Division of Mucosal Immunology, IMSUT Distinguished Professor Unit, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Department of Human Mucosal Vaccinology, Chiba University Hospital, Chiba, Japan
| | - Koji Kashima
- Technical Research Institute, Asahi Kogyosha Co., Ltd., Tokyo, Japan
| | - Shinichi Maruyama
- Technical Research Institute, Asahi Kogyosha Co., Ltd., Tokyo, Japan
| | - Tomoyuki Yamanoue
- Division of Mucosal Immunology, IMSUT Distinguished Professor Unit, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Department of Human Mucosal Vaccinology, Chiba University Hospital, Chiba, Japan
| | - Ayaka Honma
- Division of Mucosal Immunology, IMSUT Distinguished Professor Unit, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Mio Mejima
- Division of Mucosal Immunology, IMSUT Distinguished Professor Unit, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Natsumi Takeyama
- Division of Mucosal Immunology, IMSUT Distinguished Professor Unit, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Research Department, Nisseiken Co., Ltd., Tokyo, Japan
| | - Masaharu Kuroda
- Division of Genome Editing Research, National Agriculture and Food Research Organization, Tsukuba, Japan
| | - Hiroko Kozuka-Hata
- Medical Proteomics Laboratory, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Masaaki Oyama
- Medical Proteomics Laboratory, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Takehiro Masumura
- Laboratory of Genetic Engineering, Graduate School of Agriculture, Kyoto Prefectural University, Kyoto, Japan
| | - Rika Nakahashi-Ouchida
- Division of Mucosal Immunology, IMSUT Distinguished Professor Unit, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Department of Human Mucosal Vaccinology, Chiba University Hospital, Chiba, Japan
- Future Mucosal Vaccine Research and Development Synergy Institute, Chiba University, Chiba, Japan
| | - Kohtaro Fujihashi
- Division of Mucosal Immunology, IMSUT Distinguished Professor Unit, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Department of Human Mucosal Vaccinology, Chiba University Hospital, Chiba, Japan
- Future Mucosal Vaccine Research and Development Synergy Institute, Chiba University, Chiba, Japan
- Department of Pediatric Dentistry, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Takashi Hiraizumi
- Technical Research Institute, Asahi Kogyosha Co., Ltd., Tokyo, Japan
| | - Eiji Goto
- Graduate School of Horticulture, Chiba University, Chiba, Japan
| | - Hiroshi Kiyono
- Division of Mucosal Immunology, IMSUT Distinguished Professor Unit, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- R&D department, HanaVax Inc., Chiba, Japan
- Department of Human Mucosal Vaccinology, Chiba University Hospital, Chiba, Japan
- Medical Proteomics Laboratory, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Mucosal Immunology and Allergy Therapeutics, Institute for Global Prominent Research, Research Institute of Disaster Medicine, Chiba University Future Medicine Education and Research Organization, Chiba University, Chiba, Japan
- CU-UCSD Center for Mucosal Immunology, Allergy, and Vaccine (cMAV), Division of Gastroenterology, Department of Medicine, University of California, San Diego, San Diego, CA, United States
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Chen MX, Yang H, Ma YN, Mou RX, Zhu ZW, Cao ZY, Cheng FM. Absolute Quantification of Allergen Glb33 in Rice by Liquid Chromatography-Mass Spectrometry using Two Isotope-Labeled Standard Peptides. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:5026-5032. [PMID: 30933518 DOI: 10.1021/acs.jafc.8b06738] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Allergen Glb33 is an important allergen in rice that can cause allergic reactions such as asthma and atopic dermatitis. However, knowledge of the content in rice is sparse. In the present work, an absolute protein quantification method was established for allergen Glb33 in rice samples using liquid chromatography-tandem mass spectrometry. After extraction of allergen Glb33 from rice grains using salt solution, the isotope-labeled peptide internal standard was added to the extract, followed by enzymatic digestion with trypsin. The signature peptide and its isotope-labeled analogue from the tryptic hydrolysates of allergen Glb33 and the internal standard were detected by liquid chromatography-tandem mass spectrometry. The quantitative bias caused by tryptic efficiency and matrix effect was corrected by using two isotope-labeled standard peptides. The method exhibited good linearity in the range of 1-200 nM, with coefficients of determination of R2 > 0.998. A high sensitivity was observed, with a limit of quantification of 0.97 nM. Mean recoveries obtained from different rice matrices ranged from 82.7%-98.1% with precision <8.5% in intraday trials ( n = 6), while mean recoveries were from 75.1%-107.4% with precision <14.6% in interday trials ( n = 14). The developed method was successfully applied to the analysis of allergen Glb33 in 24 different rice cultivars.
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Affiliation(s)
- Ming-Xue Chen
- College of Agriculture and Biotechnology , Zhejiang University , Hangzhou 310058 , China
- Rice Product Quality Inspection and Supervision Center, Ministry of Agriculture and Rural Affairs , China National Rice Research Institute , Hangzhou 310006 , China
| | - Huan Yang
- Rice Product Quality Inspection and Supervision Center, Ministry of Agriculture and Rural Affairs , China National Rice Research Institute , Hangzhou 310006 , China
| | - You-Ning Ma
- Rice Product Quality Inspection and Supervision Center, Ministry of Agriculture and Rural Affairs , China National Rice Research Institute , Hangzhou 310006 , China
| | - Ren-Xiang Mou
- Rice Product Quality Inspection and Supervision Center, Ministry of Agriculture and Rural Affairs , China National Rice Research Institute , Hangzhou 310006 , China
| | - Zhi-Wei Zhu
- Rice Product Quality Inspection and Supervision Center, Ministry of Agriculture and Rural Affairs , China National Rice Research Institute , Hangzhou 310006 , China
| | - Zhao-Yun Cao
- Rice Product Quality Inspection and Supervision Center, Ministry of Agriculture and Rural Affairs , China National Rice Research Institute , Hangzhou 310006 , China
| | - Fang-Min Cheng
- College of Agriculture and Biotechnology , Zhejiang University , Hangzhou 310058 , China
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