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Stern D, Dettmann P, Dorner BG, Mages HW. Protein G affinity chromatography is an underrated but very potent purification method for a broad range of species-independent and tag-less Fab-fragments. J Immunol Methods 2024; 529:113669. [PMID: 38582259 DOI: 10.1016/j.jim.2024.113669] [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: 01/31/2024] [Revised: 03/15/2024] [Accepted: 04/03/2024] [Indexed: 04/08/2024]
Abstract
Because of their superior properties for certain biological applications small antibody derivatives like fragment of antigen binding (Fab) have found widespread use in basic research and as therapeutics. However, generation of Fab-fragments is still a rather complex matter, reflected by the fact that a variety of methods and purification techniques are necessary for the production of all the different classes of Fab-fragments (kappa/lambda light chains, type of species). Here we demonstrate that Fab-fragments derived from six different antibodies of human or murine origin produced by transient expression in HEK cells can be purified in a single step to a high degree of purity by standard protein G affinity chromatography. This is most likely due to alternative contact sites for protein G located in the CH1 domain of the Fab heavy chain. Our data demonstrate that protein G affinity chromatography as for whole antibodies is a robust method for the purification of tag-less Fab-fragments independent of species, significantly simplifying the process of Fab-fragment purification.
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Affiliation(s)
- Daniel Stern
- Biological Toxins (ZBS 3), Centre for Biological Threats and Special Pathogens, Robert Koch Institute, Berlin 13353, Germany
| | - Paulin Dettmann
- Biological Toxins (ZBS 3), Centre for Biological Threats and Special Pathogens, Robert Koch Institute, Berlin 13353, Germany
| | - Brigitte G Dorner
- Biological Toxins (ZBS 3), Centre for Biological Threats and Special Pathogens, Robert Koch Institute, Berlin 13353, Germany
| | - Hans Werner Mages
- Biological Toxins (ZBS 3), Centre for Biological Threats and Special Pathogens, Robert Koch Institute, Berlin 13353, Germany.
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Liu ML, Liang XM, Jin MY, Huang HW, Luo L, Wang H, Shen X, Xu ZL. Food-Borne Biotoxin Neutralization in Vivo by Nanobodies: Current Status and Prospects. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:10753-10771. [PMID: 38706131 DOI: 10.1021/acs.jafc.4c02257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2024]
Abstract
Food-borne biotoxins from microbes, plants, or animals contaminate unclean, spoiled, and rotten foods, posing significant health risks. Neutralizing such toxins is vital for human health, especially after food poisoning. Nanobodies (Nbs), a type of single-domain antibodies derived from the genetic cloning of a variable domain of heavy chain antibodies (VHHs) in camels, offer unique advantages in toxin neutralization. Their small size, high stability, and precise binding enable effective neutralization. The use of Nbs in neutralizing food-borne biotoxins offers numerous benefits, and their genetic malleability allows tailored optimization for diverse toxins. As nanotechnology continues to evolve and improve, Nbs are poised to become increasingly efficient and safer tools for toxin neutralization, playing a pivotal role in safeguarding human health and environmental safety. This review not only highlights the efficacy of these agents in neutralizing toxins but also proposes innovative solutions to address their current challenges. It lays a solid foundation for their further development in this crucial field and propels their commercial application, thereby contributing significantly to advancements in this domain.
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Affiliation(s)
- Min-Ling Liu
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Xiao-Min Liang
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Ming-Yu Jin
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
- School of Life and Health Technology, Dongguan, University of Technology, Dongguan 523808, China
| | - Hui-Wei Huang
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Lin Luo
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Xing Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
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Chen Y, Liu J, Song T, Zou X, Li L, Nie Q, Zhang P. Gaps in forensic toxicological analysis: The veiled abrin. Toxicon 2024; 242:107684. [PMID: 38513827 DOI: 10.1016/j.toxicon.2024.107684] [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: 12/24/2023] [Revised: 03/07/2024] [Accepted: 03/08/2024] [Indexed: 03/23/2024]
Abstract
Abrus precatorius is an herbaceous, flowering plant that is widely distributed in tropical and subtropical regions. Its toxic component, known as abrin, is classified as one of the potentially significant biological warfare agents and bioterrorism tools due to its high toxicity. Abrin poisoning can be utilized to cause accidents, suicides, and homicides, which necessitates attention from clinicians and forensic scientists. Although a few studies have recently identified the toxicological and pharmacological mechanisms of abrin, the exact mechanism remains unclear. Furthermore, the clinical symptoms and pathological changes induced by abrin poisoning have not been fully characterized, and there is a lack of standardized methods for identifying biological samples of the toxin. Therefore, there is an urgent need for further toxicopathologic studies and the development of detection methods for abrin in the field of forensic medicine. This review provides an overview of the clinical symptoms, pathological changes, metabolic changes, toxicologic mechanisms, and detection methods of abrin poisoning from the perspective of forensic toxicology. Additionally, the evidence on abrin in the field of forensic toxicology and forensic pathology is discussed. Overall, this review serves as a reference for understanding the toxicological mechanism of abrin, highlighting the clinical applications of the toxin, and aiding in the diagnosis and forensic identification of toxin poisoning.
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Affiliation(s)
- Yinyu Chen
- Department of Forensic Medicine, Hainan Provincial Academician Workstation (tropical forensic medicine), Hainan Provincial Tropical Forensic Engineering Research Center, Hainan Medical University, Haikou, 571199, China
| | - Jiaqi Liu
- Department of Neurology, the First Affiliated Hospital, International School of Public Health and One Health, Hainan Medical University, Haikou, 570102, China
| | - Tao Song
- Department of Forensic Medicine, Hainan Provincial Academician Workstation (tropical forensic medicine), Hainan Provincial Tropical Forensic Engineering Research Center, Hainan Medical University, Haikou, 571199, China
| | - Xing Zou
- Department of Forensic Medicine, Hainan Provincial Academician Workstation (tropical forensic medicine), Hainan Provincial Tropical Forensic Engineering Research Center, Hainan Medical University, Haikou, 571199, China
| | - Leilei Li
- Department of Forensic Medicine, Hainan Provincial Academician Workstation (tropical forensic medicine), Hainan Provincial Tropical Forensic Engineering Research Center, Hainan Medical University, Haikou, 571199, China
| | - Qianyun Nie
- Department of Pathology, School of Basic Medicine and Life Sciences, Hainan Medical University, Haikou, 571199, China; Department of Pathology, The First Affiliated Hospital of Hainan Medical University, Haikou, 570102, China.
| | - Peng Zhang
- Department of Forensic Medicine, Hainan Provincial Academician Workstation (tropical forensic medicine), Hainan Provincial Tropical Forensic Engineering Research Center, Hainan Medical University, Haikou, 571199, China.
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Ezan E, Simon S. Introduction to the Toxins Special Issue: "Antibodies for Toxins: From Detection to Therapeutics". Toxins (Basel) 2022; 14:toxins14050363. [PMID: 35622609 PMCID: PMC9146352 DOI: 10.3390/toxins14050363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 05/11/2022] [Indexed: 11/16/2022] Open
Abstract
This Special Issue aims to provide an up-to-date investigation and reviews linked to antibody-based technologies for medical countermeasures and detection/diagnosis tools for toxins [...].
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Bai X, Hu C, Chen L, Wang J, Li Y, Wan W, Jin Z, Li Y, Xin W, Kang L, Jin H, Yang H, Wang J, Gao S. A Self-Driven Microfluidic Chip for Ricin and Abrin Detection. SENSORS 2022; 22:s22093461. [PMID: 35591151 PMCID: PMC9101213 DOI: 10.3390/s22093461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/17/2022] [Accepted: 04/28/2022] [Indexed: 12/02/2022]
Abstract
Ricin and abrin are phytotoxins that can be easily used as biowarfare and bioterrorism agents. Therefore, developing a rapid detection method for both toxins is of great significance in the field of biosecurity. In this study, a novel nanoforest silicon microstructure was prepared by the micro-electro-mechanical systems (MEMS) technique; particularly, a novel microfluidic sensor chip with a capillary self-driven function and large surface area was designed. Through binding with the double antibodies sandwich immunoassay, the proposed sensor chip is confirmed to be a candidate for sensing the aforementioned toxins. Compared with conventional immunochromatographic test strips, the proposed sensor demonstrates significantly enhanced sensitivity (≤10 pg/mL for both toxins) and high specificity against the interference derived from juice or milk, while maintaining good linearity in the range of 10–6250 pg/mL. Owing to the silicon nanoforest microstructure and improved homogeneity of the color signal, short detection time (within 15 min) is evidenced for the sensor chip, which would be helpful for the rapid tracking of ricin and abrin for the field of biosecurity.
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Affiliation(s)
- Xuexin Bai
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China
- School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Chenyi Hu
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China
| | - Liang Chen
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China
| | - Jing Wang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China
| | - Yanwei Li
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China
| | - Wei Wan
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China
| | - Zhiying Jin
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China
| | - Yue Li
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China
| | - Wenwen Xin
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China
| | - Lin Kang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China
| | - Han Jin
- Institute of Micro-Nano Science and Technology, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hao Yang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China
| | - Jinglin Wang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China
| | - Shan Gao
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China
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Li Z, Xu H, Ma B, Luo L, Guo L, Zhang P, Zhao Y, Wang L, Xie J. Neutralizing Monoclonal Antibody, mAb 10D8, Is an Effective Detoxicant against Abrin-a Both In Vitro and In Vivo. Toxins (Basel) 2022; 14:toxins14030164. [PMID: 35324661 PMCID: PMC8955035 DOI: 10.3390/toxins14030164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/17/2022] [Accepted: 02/21/2022] [Indexed: 02/05/2023] Open
Abstract
Abrin is a types II ribosome-inactivating protein (RIP) isolated from Abrus precatorious seeds, which comprises a catalytically active A chain and a lectin-like B chain linked by a disulfide bond. Four isotoxins of abrin have been reported with similar amino-acid composition but different cytotoxicity, of which abrin-a is the most potent toxin. High lethality and easy availability make abrin a potential bioterrorism agent. However, there are no antidotes available for managing abrin poisoning, and treatment is only symptomatic. Currently, neutralizing antibodies remain the most effective therapy against biotoxin poisoning. In this study, we prepared, identified, and acquired a high-affinity neutralizing monoclonal antibody (mAb) 10D8 with a potent pre- and post-exposure protective effect against cytotoxicity and animal toxicity induced by abrin-a or abrin crude extract. The mAb 10D8 could rescue the mouse injected intraperitoneally with a 25 × LD50 dose of abrin-a from lethality and prevent tissue damages. Results indicated that 10D8 does not prevent the binding and internalization of abrin-a to cells but inhibits the enzymatic activity of abrin-a and reduces protein synthesis inhibition of cells. The high affinity, good specificity, and potent antitoxic efficiency of 10D8 make it a promising candidate for therapeutic antibodies against abrin.
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Affiliation(s)
- Zhi Li
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
| | - Hua Xu
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
- Correspondence: (H.X.); (J.X.); Tel.: +86-10-66930621 (H.X.); +86-10-68225893 (J.X.)
| | - Bo Ma
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
| | - Li Luo
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
| | - Lei Guo
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
| | - Pingping Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Key Laboratory of POCT for Bioemergency and Clinic, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China; (P.Z.); (Y.Z.)
| | - Yong Zhao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Key Laboratory of POCT for Bioemergency and Clinic, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China; (P.Z.); (Y.Z.)
| | - Lili Wang
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
| | - Jianwei Xie
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
- Correspondence: (H.X.); (J.X.); Tel.: +86-10-66930621 (H.X.); +86-10-68225893 (J.X.)
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