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Dong R, Yi N, Jiang D. Advances in single molecule arrays (SIMOA) for ultra-sensitive detection of biomolecules. Talanta 2024; 270:125529. [PMID: 38091745 DOI: 10.1016/j.talanta.2023.125529] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 11/25/2023] [Accepted: 12/05/2023] [Indexed: 01/27/2024]
Abstract
In the contemporary era of scientific and medical advancements, the accurate and ultra-sensitive detection of proteins, nucleic acids and metabolites plays a pivotal role in disease diagnosis and treatment monitoring. Single-molecule detection technologies play a great role in achieving this goal. In recent years, digital detection methods based on single molecule arrays (SIMOA) have brought groundbreaking contributions to the field of single-molecule detection. By confining the target molecules to femtoliter-sized containers, the SIMOA technology achieves detection sensitivity of attomolar. This review delves into the historical evolution and fundamentals of SIMOA technology, summarizes various approaches to optimize its performance, and describes the applications of SIMOA for the ultrasensitive detection of biomarkers for diseases such as cancer, COVID-19, and neurological disorders, as well as in DNA detection. Currently, some SIMOA technologies have been realized for high-throughput and multiplexed detection. It is believed that SIMOA technology will play a significant role in medical monitoring and disease prevention in the future.
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Affiliation(s)
- Renkai Dong
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Ning Yi
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Dechen Jiang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
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Yang X, Wei A, Cao X, Wang Z, Wan H, Wang B, Peng H. Identification and Biological Evaluation of a Novel Small-Molecule Inhibitor of Ricin Toxin. Molecules 2024; 29:1435. [PMID: 38611715 PMCID: PMC11012547 DOI: 10.3390/molecules29071435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 03/19/2024] [Accepted: 03/20/2024] [Indexed: 04/14/2024] Open
Abstract
The plant-derived toxin ricin is classified as a type 2 ribosome-inactivating protein (RIP) and currently lacks effective clinical antidotes. The toxicity of ricin is mainly due to its ricin toxin A chain (RTA), which has become an important target for drug development. Previous studies have identified two essential binding pockets in the active site of RTA, but most existing inhibitors only target one of these pockets. In this study, we used computer-aided virtual screening to identify a compound called RSMI-29, which potentially interacts with both active pockets of RTA. We found that RSMI-29 can directly bind to RTA and effectively attenuate protein synthesis inhibition and rRNA depurination induced by RTA or ricin, thereby inhibiting their cytotoxic effects on cells in vitro. Moreover, RSMI-29 significantly reduced ricin-mediated damage to the liver, spleen, intestine, and lungs in mice, demonstrating its detoxification effect against ricin in vivo. RSMI-29 also exhibited excellent drug-like properties, featuring a typical structural moiety of known sulfonamides and barbiturates. These findings suggest that RSMI-29 is a novel small-molecule inhibitor that specifically targets ricin toxin A chain, providing a potential therapeutic option for ricin intoxication.
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Affiliation(s)
- Xinran Yang
- State Key Laboratory of Toxicology and Medical Countermeasures, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing 100850, China; (X.Y.)
- Department of Operational Medicine, Institute of Environmental and Operational Medicine, Academy of Military Medical Sciences, Academy of Military Sciences, Tianjin 300050, China
| | - Aili Wei
- Department of Operational Medicine, Institute of Environmental and Operational Medicine, Academy of Military Medical Sciences, Academy of Military Sciences, Tianjin 300050, China
| | - Xiyuan Cao
- Department of Operational Medicine, Institute of Environmental and Operational Medicine, Academy of Military Medical Sciences, Academy of Military Sciences, Tianjin 300050, China
| | - Zicheng Wang
- State Key Laboratory of Toxicology and Medical Countermeasures, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing 100850, China; (X.Y.)
| | - Hongzhi Wan
- Department of Operational Medicine, Institute of Environmental and Operational Medicine, Academy of Military Medical Sciences, Academy of Military Sciences, Tianjin 300050, China
| | - Bo Wang
- State Key Laboratory of Toxicology and Medical Countermeasures, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing 100850, China; (X.Y.)
| | - Hui Peng
- Department of Operational Medicine, Institute of Environmental and Operational Medicine, Academy of Military Medical Sciences, Academy of Military Sciences, Tianjin 300050, China
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Liu C, Liu J, Chen Y, Jiang D, Lin H, Cao L, Wang K, Sui J. Efficient Hapten-Specific Biopanning Strategy Based on the Fe 3O 4@ENR-Functionalized Core-Shell Magnetic Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:14586-14594. [PMID: 37792480 DOI: 10.1021/acs.langmuir.3c01803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
The biopanning of target-specific phages is one of the most critical steps in the preparation of single-domain antibodies. In the traditional biopanning of haptens, the nonspecific binding of library phages to macromolecular proteins is one of the most challenging problems in preparing single-domain antibodies. In this research, Fe3O4@ENR-functionalized core-shell magnetic nanoparticles (FMNPs) were silylated and aminated by tetraethyl orthosilicate and (3-aminopropyl)triethoxysilane, and target enrofloxacin was coupled onto the surface by the carbodiimide method. The magnetic nanoparticles were characterized by Fourier transform infrared spectroscopy, particle size distribution, zeta potential, transmission electron microscopy observation, and indirect enzyme-linked immunosorbent assay (ELISA). A biopanning strategy based on Fe3O4@ENR FMNPs was then established to solve the problem in the traditional solid-phase biopanning process. The results showed that a considerable number of enrofloxacin (ENR)-positive phages were screened by only one round of biopanning. Finally, two ENR-specific shark-derived single-domain genes were identified and validated by monoclonal phage ELISA, gene sequencing, and biolayer interferometry technology. Our study provides a new biopanning strategy based on Fe3O4@ENR FMNPs for efficiently providing phages specific to haptens.
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Affiliation(s)
- Chang Liu
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266404, China
| | - Jiahui Liu
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266404, China
| | - Yuan Chen
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266404, China
| | - Difei Jiang
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266404, China
| | - Hong Lin
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266404, China
| | - Limin Cao
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266404, China
| | - Kaiqiang Wang
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266404, China
| | - Jianxin Sui
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266404, China
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Cai Q, Jin S, Zong H, Pei L, Cao K, Qu L, Li Z. A Quadruplex Ultrasensitive Immunoassay for Simultaneous Assessment of Human Reproductive Hormone Proteins in Multiple Biofluid Samples. Anal Chem 2023; 95:11641-11648. [PMID: 37489999 DOI: 10.1021/acs.analchem.3c01399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
Reproductive hormones play vital roles in reproductive health and can be used to assess a woman's ovarian function and diagnose diseases associated with reproductive endocrine disorders. As these hormones are important biomarkers for reproductive health monitoring and diagnosis, a rapid, high-throughput, and low-invasive detection and simultaneous assessment of the levels of multiple reproductive hormones has important clinical applications. In this work, a quadruplex ultrasensitive immunoassay was developed for simultaneous assessment of 4 human reproductive hormone proteins (follicle-stimulating hormone (FSH), luteinizing hormone (LH), prolactin (PRL), and anti-Müllerian hormone (AMH)) in a variety of human biofluid samples. This assay takes advantage of single-molecule imaging of microwell arrays and capture antibody beads as a reaction interface to construct multiplex bead array immunoassays. The analyte-bound beads can easily be parsed to individual wells and detected via fluorophores, emitting distinct wavelengths associated to the beads. As a result, this proposed quadruplex immunoassay exhibits four good 4-parameter logistic calibration curves ranging from 2.7 to 2000, 1.6 to 1200, 1.8 to 1300, and 0.3 to 220 pg/mL with limits of detection of 0.32, 0.28, 0.14, and 0.02 pg/mL for FSH, LH, PRL, and AMH, respectively. Furthermore, the developed quadruplex immunoassay was used to test clinical venous serum samples where it showed remarkable consistency with clinical test results in methodological comparison and the diagnosis of polycystic ovary syndrome. In addition, we successfully applied the ultrasensitive capability of this assay to the simultaneous testing and evaluation of four proteins in fingertip blood as well as urine samples, in which the urinary AMH level (1.42-156 pg/mL) was measured and assessed quantitatively for the first time.
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Affiliation(s)
- Qiyong Cai
- Institute of Chemical Biology and Clinical Application at the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450001, People's Republic of China
- College of Chemistry, Institute of Analytical Chemistry for Life Science, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Shuiling Jin
- Institute of Chemical Biology and Clinical Application at the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450001, People's Republic of China
- Department of Oncology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Hong Zong
- Institute of Chemical Biology and Clinical Application at the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450001, People's Republic of China
- Department of Oncology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Lu Pei
- Department of Laboratory Medicine, Zhengzhou Hospital of Traditional Chinese Medicine, Zhengzhou 450006, People's Republic of China
| | - Ke Cao
- Department of Laboratory Medicine, Zhengzhou Hospital of Traditional Chinese Medicine, Zhengzhou 450006, People's Republic of China
| | - Lingbo Qu
- Institute of Chemical Biology and Clinical Application at the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450001, People's Republic of China
- College of Chemistry, Institute of Analytical Chemistry for Life Science, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Zhaohui Li
- Institute of Chemical Biology and Clinical Application at the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450001, People's Republic of China
- College of Chemistry, Institute of Analytical Chemistry for Life Science, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou 450001, People's Republic of China
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Ionescu RE. Ultrasensitive Electrochemical Immunosensors Using Nanobodies as Biocompatible Sniffer Tools of Agricultural Contaminants and Human Disease Biomarkers. MICROMACHINES 2023; 14:1486. [PMID: 37630022 PMCID: PMC10456424 DOI: 10.3390/mi14081486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/19/2023] [Accepted: 07/21/2023] [Indexed: 08/27/2023]
Abstract
Nanobodies (Nbs) are known as camelid single-domain fragments or variable heavy chain antibodies (VHH) that in vitro recognize the antigens (Ag) similar to full-size antibodies (Abs) and in vivo allow immunoreactions with biomolecule cavities inaccessible to conventional Abs. Currently, Nbs are widely used for clinical treatments due to their remarkably improved performance, ease of production, thermal robustness, superior physical and chemical properties. Interestingly, Nbs are also very promising bioreceptors for future rapid and portable immunoassays, compared to those using unstable full-size antibodies. For all these reasons, Nbs are excellent candidates in ecological risk assessments and advanced medicine, enabling the development of ultrasensitive biosensing platforms. In this review, immobilization strategies of Nbs on conductive supports for enhanced electrochemical immune detection of food contaminants (Fcont) and human biomarkers (Hbio) are discussed. In the case of Fcont, the direct competitive immunoassay detection using coating antigen solid surface is the most commonly used approach for efficient Nbs capture which was characterized with cyclic voltammetry (CV) and differential pulse voltammetry (DPV) when the signal decays for increasing concentrations of free antigen prepared in aqueous solutions. In contrast, for the Hbio investigations on thiolated gold electrodes, increases in amperometric and electrochemical impedance spectroscopy (EIS) signals were recorded, with increases in the antigen concentrations prepared in PBS or spiked real human samples.
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Affiliation(s)
- Rodica Elena Ionescu
- Light, Nanomaterials and Nanotechnology (L2n) Laboratory, CNRS EMR 7004, University of Technology of Troyes, 12 Rue Marie Curie CS 42060, 10004 Troyes, France
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Liu C, Lin H, Cao L, Wang K, Sui J. Characterization, specific recognition, and the performance in fish matrix of a shark-derived single-domain antibody against enrofloxacin. Talanta 2023; 265:124852. [PMID: 37385191 DOI: 10.1016/j.talanta.2023.124852] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 06/16/2023] [Accepted: 06/19/2023] [Indexed: 07/01/2023]
Abstract
The third generation of genetic engineering antibodies, single-domain antibodies, have been widely reported as potential biomaterials in recognizing small molecular hazards. In this study, a shark-derived single-domain antibody was used as the recognition element for the first time to detect enrofloxacin (ENR), one of the most representative hazards in aquaculture. An ENR-specific clone named 2E6 was isolated by phage display technology. Experimental results proved that 2E6 ssdAb showed high affinity to ENR-PEI complete antigen, with the highest OD450 value of 1.348 in binding ELISA. Through icELISA, it was determined that the IC50 of 2E6 ssdAb to ENR was 19.230 ng/mL, while the IC10 was 0.975 ng/mL, with rare recognition to other fluoroquinolones, which showed high sensitivity and specificity to ENR. The 2E6 ssdAb also performed excellently in fish matrix immunoassay. Results showed that the ENR-negative fish matrix did not seriously interfere with the recognition of 2E6 ssdAb to ENR-OVA, with the matrix index between 4.85% and 11.75%, while the results of icELISA in ENR-spiked fish matrix showed that 2E6 ssdAb could recognize the target ENR in different ENR-spiked concentrations of the fish matrix (10-1000 ng/mL), with the recovery between 89.30% and 126.38% and the RSD between 1.95% and 9.83%. This study broadens the application scenario of shark-derived single-domain antibodies as small molecule recognition biomaterials, providing a new recognition element on ENR detection for immunoassay.
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Affiliation(s)
- Chang Liu
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong, 266100, China
| | - Hong Lin
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong, 266100, China
| | - Limin Cao
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong, 266100, China
| | - Kaiqiang Wang
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong, 266100, China
| | - Jianxin Sui
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong, 266100, China.
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Liu C, Lin H, Cao L, Wang K, Sui J. Research progress on unique paratope structure, antigen binding modes, and systematic mutagenesis strategies of single-domain antibodies. Front Immunol 2022; 13:1059771. [PMID: 36479130 PMCID: PMC9720397 DOI: 10.3389/fimmu.2022.1059771] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 11/07/2022] [Indexed: 11/22/2022] Open
Abstract
Single-domain antibodies (sdAbs) showed the incredible advantages of small molecular weight, excellent affinity, specificity, and stability compared with traditional IgG antibodies, so their potential in binding hidden antigen epitopes and hazard detection in food, agricultural and veterinary fields were gradually explored. Moreover, its low immunogenicity, easy-to-carry target drugs, and penetration of the blood-brain barrier have made sdAbs remarkable achievements in medical treatment, toxin neutralization, and medical imaging. With the continuous development and maturity of modern molecular biology, protein analysis software and database with different algorithms, and next-generation sequencing technology, the unique paratope structure and different antigen binding modes of sdAbs compared with traditional IgG antibodies have aroused the broad interests of researchers with the increased related studies. However, the corresponding related summaries are lacking and needed. Different antigens, especially hapten antigens, show distinct binding modes with sdAbs. So, in this paper, the unique paratope structure of sdAbs, different antigen binding cases, and the current maturation strategy of sdAbs were classified and summarized. We hope this review lays a theoretical foundation to elucidate the antigen-binding mechanism of sdAbs and broaden the further application of sdAbs.
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Dual amplification enabled counting based ultrasensitive enzyme-linked immunosorbent assay. Anal Chim Acta 2022; 1198:339510. [DOI: 10.1016/j.aca.2022.339510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 01/12/2022] [Accepted: 01/14/2022] [Indexed: 11/17/2022]
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Su Z, Li T, Wu D, Wu Y, Li G. Recent Progress on Single-Molecule Detection Technologies for Food Safety. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:458-469. [PMID: 34985271 DOI: 10.1021/acs.jafc.1c06808] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Rapid and sensitive detection technologies for food contaminants play vital roles in food safety. Due to the complexity of the food matrix and the trace amount distribution, traditional methods often suffer from unsatisfying accuracy, sensitivity, or specificity. In past decades, single-molecule detection (SMD) has emerged as a way to realize the rapid and ultrasensitive measurement with low sample consumption, showing a great potential in food contaminants detection. For instance, based on the nanopore technique, simple and effective methods for single-molecule analysis of food contaminants have been developed. To our knowledge, there has been a rare review that focuses on SMD techniques for food safety. The present review attempts to cover some typical SMD methods in food safety, including electrochemistry, optical spectrum, and atom force microscopy. Then, recent applications of these techniques for detecting food contaminants such as biotoxins, pesticides, heavy metals, and illegal additives are reviewed. Finally, existing research challenges and future trends of SMD in food safety are also tentatively proposed.
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Affiliation(s)
- Zhuoqun Su
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Tong Li
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Di Wu
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, United Kingdom
| | - Yongning Wu
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
- NHC Key Laboratory of Food Safety Risk Assessment, Food Safety Research Unit (2019RU014) of Chinese Academy of Medical Science, China National Center for Food Safety Risk Assessment, Beijing 100021, China
| | - Guoliang Li
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
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Morasso C, Ricciardi A, Sproviero D, Truffi M, Albasini S, Piccotti F, Sottotetti F, Mollica L, Cereda C, Sorrentino L, Corsi F. Fast quantification of extracellular vesicles levels in early breast cancer patients by Single Molecule Detection Array (SiMoA). Breast Cancer Res Treat 2021; 192:65-74. [PMID: 34935096 PMCID: PMC8841315 DOI: 10.1007/s10549-021-06474-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 12/02/2021] [Indexed: 10/25/2022]
Abstract
PURPOSE Preliminary reports suggest that extracellular vesicles (EVs) might be a promising biomarker for breast cancer (BC). However, the quantification of plasmatic levels of EVs is a complex task. To overcome these limitations, we developed a new, fast, and easy to use assay for the quantification of EVs directly in plasma based on the use of Single-Molecule Array (SiMoA). METHODS By using SiMoA to identify CD9+/CD63+ EVs, we analyzed plasma samples of 181 subjects (95 BC and 86 healthy controls, HC). A calibration curve, made of a serial dilution of lyophilized standards from human plasma, was used in each run to ensure the obtainment of quantitative results from the assay. In a subgroup of patients, EVs concentrations were estimated in plasma before and after 30 days from cancer surgery. Additional information on the size of EVs were also acquired using a Nanosight system to obtain a clearer understanding of the mechanism underlying the releases of EVs associated with the presence of cancer. RESULTS The measured levels of EVs resulted significantly higher in BC patients (median values 1179.1 ng/µl vs 613.0 ng/µl, p < 0.0001). ROC curve was used to define the optimal cut-off level of the test at 1034.5 ng/µl with an AUC of 0.75 [95% CI 0.68-0.82]. EVs plasmatic concentrations significantly decreased after cancer surgery compared to baseline values (p = 0.014). No correlation was found between EVs concentration and clinical features of BC. CONCLUSION SiMoA assay allows plasmatic EVs levels detection directly without any prior processing. EVs levels are significantly higher in BC patients and significantly decreases after cancer surgery.
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Affiliation(s)
- Carlo Morasso
- Laboratory of Nanomedicine, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
| | - Alessandra Ricciardi
- Laboratory of Nanomedicine, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
| | - Daisy Sproviero
- Genomic and Post-Genomic Center, IRCCS Mondino Foundation, Pavia, Italy
| | - Marta Truffi
- Laboratory of Nanomedicine, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
| | - Sara Albasini
- Breast Unit, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
| | - Francesca Piccotti
- Laboratory of Nanomedicine, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
| | - Federico Sottotetti
- Medical Oncology Unit, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
| | - Ludovica Mollica
- Medical Oncology Unit, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
| | - Cristina Cereda
- Genomic and Post-Genomic Center, IRCCS Mondino Foundation, Pavia, Italy
| | - Luca Sorrentino
- Colorectal Surgery Unit, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Fabio Corsi
- Breast Unit, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy. .,Dipartimento di Scienze Biomediche e Cliniche "L. Sacco", Università di Milano, Via G.B. Grassi, 74, 20157, Milan, Italy.
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Yang B, Jiang X, Fang X, Kong J. Wearable chem-biosensing devices: from basic research to commercial market. LAB ON A CHIP 2021; 21:4285-4310. [PMID: 34672310 DOI: 10.1039/d1lc00438g] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Wearable chem-biosensors have been garnering tremendous interest due to the significant potential in tailored healthcare diagnostics and therapeutics. With the development of the medical diagnostics revolution, wearable chem-biosensors as a rapidly emerging wave allow individuals to perform on-demand detection and obtain the required in-depth information. In contrast to commercial wearables, which tend to be miniaturized for measuring physical activities, the recent progressive wearable chem-biosensing device have mainly focused on non-invasive or minimally invasive monitoring biomarkers at the molecular level. Wearables is a multidisciplinary subject, and chem-biosensing is one of the most significant technologies. In this review, the currently basic academic research of wearable chem-biosensing devices and its commercial transformation were summarized and highlighted. Moreover, some representative wearable products on the market for individual health managements are presented. Strategies for the identification and sensing of biomarkers are discussed to further promote the development of wearable chem-biosensing devices. We also shared the limitations and breakthroughs of the next generation of chemo-biosensor wearables, from home use to clinical diagnosis.
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Affiliation(s)
- Bin Yang
- Department of Chemistry and Institutes of Biomedical Sciences, Fudan University, Shanghai, 200433, P. R. China.
| | - Xingyu Jiang
- Department of Biomedical Engineering, Shenzhen Bay Laboratory, Southern University of Science and Technology, Shenzhen, 518055, P. R. China.
| | - Xueen Fang
- Department of Chemistry and Institutes of Biomedical Sciences, Fudan University, Shanghai, 200433, P. R. China.
| | - Jilie Kong
- Department of Chemistry and Institutes of Biomedical Sciences, Fudan University, Shanghai, 200433, P. R. China.
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A critical review: Recent advances in "digital" biomolecule detection with single copy sensitivity. Biosens Bioelectron 2021; 177:112901. [PMID: 33472132 PMCID: PMC7836387 DOI: 10.1016/j.bios.2020.112901] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 12/08/2020] [Accepted: 12/10/2020] [Indexed: 02/06/2023]
Abstract
Detection of a single biomolecule, ranging from nucleic acids, proteins, viruses to bacteria, is of paramount importance in various fields including biology, environment, food and agriculture industry, public health, and medicine. With the understanding of the biological functions of these biomolecules (or bioparticles) and their impacts on public health, environmental pollution, and food safety, advanced detection techniques are unprecedentedly demanded for their early and/or sensitive detection. In this critical review, a series of elegant research about digital detection of biomolecules with potential single copy sensitivity is reviewed and summarized with the focus on the design principle and the innovation of how to accomplish the “digital” detection concept. Starting with a brief introduction on the importance of digital detection, recent advances in “digital” biomolecule detection with single copy sensitivity are grouped and discussed based on the difference of signal reporting systems, including surrogate signal development for “digital” detection, direct visualization for “digital” detection, and nucleic acid amplification enabled “digital” detection. Interdisciplinary combination and integration of different cutting-edge techniques are also discussed with details. The review is closed with the conclusion and future trends.
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Ben-Othman R, Cai B, Liu AC, Varankovich N, He D, Blimkie TM, Lee AH, Gill EE, Novotny M, Aevermann B, Drissler S, Shannon CP, McCann S, Marty K, Bjornson G, Edgar RD, Lin DTS, Gladish N, Maclsaac J, Amenyogbe N, Chan Q, Llibre A, Collin J, Landais E, Le K, Reiss SM, Koff WC, Havenar-Daughton C, Heran M, Sangha B, Walt D, Krajden M, Crotty S, Sok D, Briney B, Burton DR, Duffy D, Foster LJ, Mohn WW, Kobor MS, Tebbutt SJ, Brinkman RR, Scheuermann RH, Hancock REW, Kollmann TR, Sadarangani M. Systems Biology Methods Applied to Blood and Tissue for a Comprehensive Analysis of Immune Response to Hepatitis B Vaccine in Adults. Front Immunol 2020; 11:580373. [PMID: 33250895 PMCID: PMC7672042 DOI: 10.3389/fimmu.2020.580373] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 09/24/2020] [Indexed: 12/26/2022] Open
Abstract
Conventional vaccine design has been based on trial-and-error approaches, which have been generally successful. However, there have been some major failures in vaccine development and we still do not have highly effective licensed vaccines for tuberculosis, HIV, respiratory syncytial virus, and other major infections of global significance. Approaches at rational vaccine design have been limited by our understanding of the immune response to vaccination at the molecular level. Tools now exist to undertake in-depth analysis using systems biology approaches, but to be fully realized, studies are required in humans with intensive blood and tissue sampling. Methods that support this intensive sampling need to be developed and validated as feasible. To this end, we describe here a detailed approach that was applied in a study of 15 healthy adults, who were immunized with hepatitis B vaccine. Sampling included ~350 mL of blood, 12 microbiome samples, and lymph node fine needle aspirates obtained over a ~7-month period, enabling comprehensive analysis of the immune response at the molecular level, including single cell and tissue sample analysis. Samples were collected for analysis of immune phenotyping, whole blood and single cell gene expression, proteomics, lipidomics, epigenetics, whole blood response to key immune stimuli, cytokine responses, in vitro T cell responses, antibody repertoire analysis and the microbiome. Data integration was undertaken using different approaches-NetworkAnalyst and DIABLO. Our results demonstrate that such intensive sampling studies are feasible in healthy adults, and data integration tools exist to analyze the vast amount of data generated from a multi-omics systems biology approach. This will provide the basis for a better understanding of vaccine-induced immunity and accelerate future rational vaccine design.
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Affiliation(s)
- Rym Ben-Othman
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, BC, Canada.,Telethon Kids Institute, University of Western Australia, Nedlands, WA, Australia
| | - Bing Cai
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Aaron C Liu
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Natallia Varankovich
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Daniel He
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Travis M Blimkie
- Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, BC, Canada
| | - Amy H Lee
- Simon Fraser University, Burnaby, BC, Canada
| | - Erin E Gill
- Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, BC, Canada
| | - Mark Novotny
- Department of Informatics, J. Craig Venter Institute (La Jolla), La Jolla, CA, United States
| | - Brian Aevermann
- Department of Informatics, J. Craig Venter Institute (La Jolla), La Jolla, CA, United States
| | | | - Casey P Shannon
- Prevention of Organ Failure (PROOF) Centre of Excellence and Centre for Heart Lung Innovation, St. Paul's Hospital, Vancouver, BC, Canada
| | - Sarah McCann
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Kim Marty
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Gordean Bjornson
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Rachel D Edgar
- Centre for Molecular Medicine and Therapeutics, Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - David Tse Shen Lin
- Centre for Molecular Medicine and Therapeutics, Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Nicole Gladish
- Centre for Molecular Medicine and Therapeutics, Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Julia Maclsaac
- Centre for Molecular Medicine and Therapeutics, Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Nelly Amenyogbe
- Telethon Kids Institute, University of Western Australia, Nedlands, WA, Australia
| | - Queenie Chan
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Alba Llibre
- Translational Immunology Lab, Institut Pasteur, Paris, France
| | - Joyce Collin
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, United States
| | - Elise Landais
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, United States.,IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA, United States
| | - Khoa Le
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, United States.,IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA, United States
| | - Samantha M Reiss
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology (LJI), La Jolla, CA, United States
| | - Wayne C Koff
- Human Vaccines Project, New York, NY, United States
| | - Colin Havenar-Daughton
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology (LJI), La Jolla, CA, United States
| | - Manraj Heran
- Department of Radiology, BC Children's Hospital, Vancouver, BC, Canada
| | - Bippan Sangha
- Department of Radiology, BC Children's Hospital, Vancouver, BC, Canada
| | - David Walt
- Wyss Institute at Harvard University, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Mel Krajden
- British Columbia Centre for Disease Control, Vancouver, BC, Canada
| | - Shane Crotty
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology (LJI), La Jolla, CA, United States
| | - Devin Sok
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, United States.,IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA, United States
| | - Bryan Briney
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, United States
| | - Dennis R Burton
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, United States
| | - Darragh Duffy
- Translational Immunology Lab, Institut Pasteur, Paris, France
| | - Leonard J Foster
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - William W Mohn
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada
| | - Michael S Kobor
- Centre for Molecular Medicine and Therapeutics, Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Scott J Tebbutt
- Prevention of Organ Failure (PROOF) Centre of Excellence and Centre for Heart Lung Innovation, St. Paul's Hospital, Vancouver, BC, Canada.,Department of Medicine, Division of Respiratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Ryan R Brinkman
- Terry Fox Laboratory, Vancouver, BC, Canada.,Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Richard H Scheuermann
- Department of Informatics, J. Craig Venter Institute (La Jolla), La Jolla, CA, United States.,Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology (LJI), La Jolla, CA, United States
| | - Robert E W Hancock
- Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, BC, Canada
| | - Tobias R Kollmann
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, BC, Canada.,Telethon Kids Institute, University of Western Australia, Nedlands, WA, Australia
| | - Manish Sadarangani
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, BC, Canada
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14
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Ye QC, Men C, Li YF, Liu JJ, Huang CZ, Zhen SJ. Catalytic hairpin assembly mediated liposome-encoded magnetic beads for signal amplification of peroxide test strip based point-of-care testing of ricin. Chem Commun (Camb) 2020; 56:14091-14094. [PMID: 33107866 DOI: 10.1039/d0cc05456a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Herein, we propose a new peroxide test strip (PTS) based point-of-care testing (POCT) method to detect ricin B-chain qualitatively and quantitatively by using catalytic hairpin assembly (CHA) mediated liposome-encoded magnetic beads for signal amplification. The sensitivity of this PTS based POCT method was improved significantly because it combined CHA signal amplification and liposome-based signal amplification.
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Affiliation(s)
- Qi Chao Ye
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China.
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15
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Wang X, Walt DR. Simultaneous detection of small molecules, proteins and microRNAs using single molecule arrays. Chem Sci 2020; 11:7896-7903. [PMID: 34094160 PMCID: PMC8163101 DOI: 10.1039/d0sc02552f] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 07/07/2020] [Indexed: 12/17/2022] Open
Abstract
Biological samples such as blood, urine, cerebrospinal fluid and saliva contain a large variety of proteins, nucleic acids, and small molecules. These molecules can serve as potential biomarkers of disease and therefore, it is desirable to simultaneously detect multiple biomarkers in one sample. Current detection techniques suffer from various limitations including low analytical sensitivity and complex sample processing. In this work, we present an ultrasensitive method for simultaneous detection of small molecules, proteins and microRNAs using single molecule arrays (Simoa). Dye-encoded beads modified with specific capture probes were used to quantify each analyte. Multiplex competitive Simoa assays were established for simultaneous detection of cortisol and prostaglandin E2. In addition, competitive and sandwich immunoassays were combined with a direct nucleic acid hybridization assay for simultaneous detection of cortisol, interleukin 6 and microRNA 141. The multi-analyte Simoa assay shows high sensitivity and specificity, which provides a powerful tool for the analysis of many different samples.
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Affiliation(s)
- Xu Wang
- Wyss Institute for Biologically Inspired Engineering, Harvard University Boston MA 02115 USA +1-8573071112
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School Boston MA 02115 USA
| | - David R Walt
- Wyss Institute for Biologically Inspired Engineering, Harvard University Boston MA 02115 USA +1-8573071112
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School Boston MA 02115 USA
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16
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Farka Z, Mickert MJ, Pastucha M, Mikušová Z, Skládal P, Gorris HH. Fortschritte in der optischen Einzelmoleküldetektion: Auf dem Weg zu höchstempfindlichen Bioaffinitätsassays. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201913924] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zdeněk Farka
- CEITEC – Central European Institute of TechnologyMasaryk University 625 00 Brno Czech Republic
| | - Matthias J. Mickert
- Institut für Analytische Chemie, Chemo- und BiosensorikUniversität Regensburg Universitätsstraße 31 93040 Regensburg Deutschland
| | - Matěj Pastucha
- CEITEC – Central European Institute of TechnologyMasaryk University 625 00 Brno Czech Republic
- Department of BiochemistryFaculty of ScienceMasaryk University 625 00 Brno Czech Republic
| | - Zuzana Mikušová
- CEITEC – Central European Institute of TechnologyMasaryk University 625 00 Brno Czech Republic
- Department of BiochemistryFaculty of ScienceMasaryk University 625 00 Brno Czech Republic
| | - Petr Skládal
- CEITEC – Central European Institute of TechnologyMasaryk University 625 00 Brno Czech Republic
- Department of BiochemistryFaculty of ScienceMasaryk University 625 00 Brno Czech Republic
| | - Hans H. Gorris
- Institut für Analytische Chemie, Chemo- und BiosensorikUniversität Regensburg Universitätsstraße 31 93040 Regensburg Deutschland
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17
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Farka Z, Mickert MJ, Pastucha M, Mikušová Z, Skládal P, Gorris HH. Advances in Optical Single-Molecule Detection: En Route to Supersensitive Bioaffinity Assays. Angew Chem Int Ed Engl 2020; 59:10746-10773. [PMID: 31869502 PMCID: PMC7318240 DOI: 10.1002/anie.201913924] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/20/2019] [Indexed: 12/11/2022]
Abstract
The ability to detect low concentrations of analytes and in particular low-abundance biomarkers is of fundamental importance, e.g., for early-stage disease diagnosis. The prospect of reaching the ultimate limit of detection has driven the development of single-molecule bioaffinity assays. While many review articles have highlighted the potentials of single-molecule technologies for analytical and diagnostic applications, these technologies are not as widespread in real-world applications as one should expect. This Review provides a theoretical background on single-molecule-or better digital-assays to critically assess their potential compared to traditional analog assays. Selected examples from the literature include bioaffinity assays for the detection of biomolecules such as proteins, nucleic acids, and viruses. The structure of the Review highlights the versatility of optical single-molecule labeling techniques, including enzymatic amplification, molecular labels, and innovative nanomaterials.
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Affiliation(s)
- Zdeněk Farka
- CEITEC – Central European Institute of TechnologyMasaryk University625 00BrnoCzech Republic
| | - Matthias J. Mickert
- Institute of Analytical Chemistry, Chemo- and BiosensorsUniversity of RegensburgUniversitätsstraße 3193040RegensburgGermany
| | - Matěj Pastucha
- CEITEC – Central European Institute of TechnologyMasaryk University625 00BrnoCzech Republic
- Department of BiochemistryFaculty of ScienceMasaryk University625 00BrnoCzech Republic
| | - Zuzana Mikušová
- CEITEC – Central European Institute of TechnologyMasaryk University625 00BrnoCzech Republic
- Department of BiochemistryFaculty of ScienceMasaryk University625 00BrnoCzech Republic
| | - Petr Skládal
- CEITEC – Central European Institute of TechnologyMasaryk University625 00BrnoCzech Republic
- Department of BiochemistryFaculty of ScienceMasaryk University625 00BrnoCzech Republic
| | - Hans H. Gorris
- Institute of Analytical Chemistry, Chemo- and BiosensorsUniversity of RegensburgUniversitätsstraße 3193040RegensburgGermany
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18
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Swiner DJ, Durisek GR, Osae H, Badu-Tawiah A. A Proof-of-Concept, Two-Tiered Approach for Ricin Detection Using Ambient Mass Spectrometry. RSC Adv 2020; 10:17045-17049. [PMID: 35173958 PMCID: PMC8846442 DOI: 10.1039/d0ra03317k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Ricin is a naturally occurring, highly potent toxin native to castor bean plants that has recently been used as a biological weapon in cases of bioterrorism and suicide attempts. Difficulties with direct detection arise from large heterogeneities in ricin glycosylation, which leads to markedly different bioactivity, and the fact that carefully developed and laborious sample preparation steps are required to maintain the activity of the protein during analysis. Herein, we present an alternative, two-tiered approach to identify the presence of ricin by detecting ricinoleic acid and ricinine, which are co-extracted with the protein. This direct mass spectrometric-based technique takes as little as 2 minutes, and we determined its sensitivity to be in the parts-per-trillion range. Our method is applicable to paper substrates from suspected contaminated envelopes and biofluids from at-risk patients. The fact that prior sample preparations are not needed in this procedure means that analysis can be performed in the field for emergency cases. Ricin is a naturally occurring, highly potent toxin native to castor bean plants that has recently been used as a biological weapon in cases of bioterrorism and suicide attempts.![]()
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Affiliation(s)
- Devin J Swiner
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W 18th Ave, Columbus, OH 43210
| | - George R Durisek
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W 18th Ave, Columbus, OH 43210
| | - Hannah Osae
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W 18th Ave, Columbus, OH 43210
| | - Abraham Badu-Tawiah
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W 18th Ave, Columbus, OH 43210
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19
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Akkilic N, Geschwindner S, Höök F. Single-molecule biosensors: Recent advances and applications. Biosens Bioelectron 2019; 151:111944. [PMID: 31999573 DOI: 10.1016/j.bios.2019.111944] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/26/2019] [Accepted: 11/29/2019] [Indexed: 02/07/2023]
Abstract
Single-molecule biosensors serve the unmet need for real time detection of individual biological molecules in the molecular crowd with high specificity and accuracy, uncovering unique properties of individual molecules which are hidden when measured using ensemble averaging methods. Measuring a signal generated by an individual molecule or its interaction with biological partners is not only crucial for early diagnosis of various diseases such as cancer and to follow medical treatments but also offers a great potential for future point-of-care devices and personalized medicine. This review summarizes and discusses recent advances in nanosensors for both in vitro and in vivo detection of biological molecules offering single-molecule sensitivity. In the first part, we focus on label-free platforms, including electrochemical, plasmonic, SERS-based and spectroelectrochemical biosensors. We review fluorescent single-molecule biosensors in the second part, highlighting nanoparticle-amplified assays, digital platforms and the utilization of CRISPR technology. We finally discuss recent advances in the emerging nanosensor technology of important biological species as well as future perspectives of these sensors.
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Affiliation(s)
- Namik Akkilic
- Structure, Biophysics and Fragment-based Lead Generation, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden.
| | - Stefan Geschwindner
- Structure, Biophysics and Fragment-based Lead Generation, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Fredrik Höök
- Department of Applied Physics, Division of Biological Physics, Chalmers University of Technology, Gothenburg, Sweden.
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20
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Liang LH, Liu CC, Chen B, Yan L, Yu HL, Yang Y, Wu JN, Li XS, Liu SL. LC-HRMS Screening and Identification of Novel Peptide Markers of Ricin Based on Multiple Protease Digestion Strategies. Toxins (Basel) 2019; 11:toxins11070393. [PMID: 31284465 PMCID: PMC6669667 DOI: 10.3390/toxins11070393] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/02/2019] [Accepted: 07/04/2019] [Indexed: 12/13/2022] Open
Abstract
Both ricin and R. communisagglutinin (RCA120), belonging to the type II ribosome-inactivating proteins (RIPs-Ⅱ), are derived from the seeds of the castor bean plant. They share very similar amino acid sequences, but ricin is much more toxic than RCA120. It is urgently necessary to distinguish ricin and RCA120 in response to public safety. Currently, mass spectrometric assays are well established for unambiguous identification of ricin by accurate analysis of differentiated amino acid residues after trypsin digestion. However, diagnostic peptides are relatively limited for unambiguous identification of trace ricin, especially in complex matrices. Here, we demonstrate a digestion strategy of multiple proteinases to produce novel peptide markers for unambiguous identification of ricin. Liquid chromatography-high resolution MS (LC-HRMS) was used to verify the resulting peptides, among which only the peptides with uniqueness and good MS response were selected as peptide markers. Seven novel peptide markers were obtained from tandem digestion of trypsin and endoproteinase Glu-C in PBS buffer. From the chymotrypsin digestion under reduction and non-reduction conditions, eight and seven novel peptides were selected respectively. Using pepsin under pH 1~2 and proteinase K digestion, six and five peptides were selected as novel peptide markers. In conclusion, the obtained novel peptides from the established digestion methods can be recommended for the unambiguous identification of ricin during the investigation of illegal use of the toxin.
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Affiliation(s)
- Long-Hui Liang
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
- The laboratory of Analytical Chemistry, Research Institute of Chemical Defence, Beijing 102205, China
| | - Chang-Cai Liu
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China.
- The laboratory of Analytical Chemistry, Research Institute of Chemical Defence, Beijing 102205, China.
| | - Bo Chen
- The laboratory of Analytical Chemistry, Research Institute of Chemical Defence, Beijing 102205, China
| | - Long Yan
- The laboratory of Analytical Chemistry, Research Institute of Chemical Defence, Beijing 102205, China
| | - Hui-Lan Yu
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
- The laboratory of Analytical Chemistry, Research Institute of Chemical Defence, Beijing 102205, China
| | - Yang Yang
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
- The laboratory of Analytical Chemistry, Research Institute of Chemical Defence, Beijing 102205, China
| | - Ji-Na Wu
- The laboratory of Analytical Chemistry, Research Institute of Chemical Defence, Beijing 102205, China
| | - Xiao-Sen Li
- The laboratory of Analytical Chemistry, Research Institute of Chemical Defence, Beijing 102205, China
| | - Shi-Lei Liu
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China.
- The laboratory of Analytical Chemistry, Research Institute of Chemical Defence, Beijing 102205, China.
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21
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Wang X, Cohen L, Wang J, Walt DR. Competitive Immunoassays for the Detection of Small Molecules Using Single Molecule Arrays. J Am Chem Soc 2018; 140:18132-18139. [PMID: 30495929 DOI: 10.1021/jacs.8b11185] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Small-molecule detection is important for many applications including clinical diagnostics, drug discovery, and measurements of environmental samples and agricultural products. Current techniques for small-molecule detection suffer from various limitations including low analytical sensitivity and complex sample processing. Furthermore, as a result of their small size, small molecules are difficult to detect using an antibody pair in a traditional sandwich assay format. To overcome these limitations, we developed an ultrasensitive competitive immunoassay for small-molecule detection using Single Molecule Arrays (Simoa). We show that the competitive Simoa assay is approximately 50-fold more sensitive than the conventional ELISA. We performed theoretical calculations to determine the factors that influence the sensitivity of competitive Simoa assays and used them to achieve maximal sensitivity. We also demonstrate detection of small molecules in complex biological samples. We show that the competitive Simoa assay is a simple, fast, and highly sensitive approach for ultrasensitive detection of small molecules.
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Affiliation(s)
- Xu Wang
- Department of Pathology, Brigham and Women's Hospital , Harvard Medical School , Boston , Massachusetts 02115 , United States
| | - Limor Cohen
- Department of Pathology, Brigham and Women's Hospital , Harvard Medical School , Boston , Massachusetts 02115 , United States
| | - Jun Wang
- School of Physical and Mathematical Sciences , Nanjing Tech University , Nanjing , Jiangsu 211816 , China
| | - David R Walt
- Department of Pathology, Brigham and Women's Hospital , Harvard Medical School , Boston , Massachusetts 02115 , United States
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22
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Men C, Li CH, Wei XM, Liu JJ, Liu YX, Huang CZ, Zhen SJ. A sensitive and low background fluorescent sensing strategy based on g-C 3N 4-MnO 2 sandwich nanocomposite and liposome amplification for ricin detection. Analyst 2018; 143:5764-5770. [PMID: 30334036 DOI: 10.1039/c8an01217b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Ricin is an extremely potent ribosome-inactivating protein and serves as a likely food biocontaminant or biological weapon. Thus, simple, sensitive and accurate analytical assays capable of detecting ricin are urgently needed to be established. Herein, we present a novel method for ricin B-chain (RTB) detection by using two materials: (a) a highly efficient hybrid probe that was formed by linking a glucose oxidase (GOD)-encapsulated liposome (GOD-L) to magnetic beads (MBs) through hybridization between an aptamer and a blocker and (b) a new low-background g-C3N4-MnO2 sandwich nanocomposite that exhibits fluorescence resonance energy transfer (FRET) between the g-C3N4 nanosheet and MnO2. In the presence of RTB, the strong binding between RTB and the aptamer can release the blocker-linked liposome from the surface of the MBs. After magnetic separation, the decomposed liposome can release GOD to catalyze the oxidation of glucose, generating a certain amount of H2O2. Then, H2O2 can reduce MnO2 of the g-C3N4-MnO2 nanocomposite to Mn2+, which leads to the elimination of FRET. Thus, the fluorescence of the g-C3N4 nanosheet will be turned on. Because of the excellent signal amplification ability of liposome and the characteristic highly sensitive response of the g-C3N4-MnO2 nanocomposite toward H2O2, RTB could be detected sensitively based on the significantly enhanced fluorescent intensity. The linear range of detection was from 0.25 μg mL-1 to 50 μg mL-1 and the limit of detection (LOD) was 190 ng mL-1. Moreover, the proposed assay was successfully applied in the detection of the entire ricin toxin content in a castor seed.
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Affiliation(s)
- Chen Men
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, P.R. China.
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23
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Walper SA, Lasarte Aragonés G, Sapsford KE, Brown CW, Rowland CE, Breger JC, Medintz IL. Detecting Biothreat Agents: From Current Diagnostics to Developing Sensor Technologies. ACS Sens 2018; 3:1894-2024. [PMID: 30080029 DOI: 10.1021/acssensors.8b00420] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Although a fundamental understanding of the pathogenicity of most biothreat agents has been elucidated and available treatments have increased substantially over the past decades, they still represent a significant public health threat in this age of (bio)terrorism, indiscriminate warfare, pollution, climate change, unchecked population growth, and globalization. The key step to almost all prevention, protection, prophylaxis, post-exposure treatment, and mitigation of any bioagent is early detection. Here, we review available methods for detecting bioagents including pathogenic bacteria and viruses along with their toxins. An introduction placing this subject in the historical context of previous naturally occurring outbreaks and efforts to weaponize selected agents is first provided along with definitions and relevant considerations. An overview of the detection technologies that find use in this endeavor along with how they provide data or transduce signal within a sensing configuration follows. Current "gold" standards for biothreat detection/diagnostics along with a listing of relevant FDA approved in vitro diagnostic devices is then discussed to provide an overview of the current state of the art. Given the 2014 outbreak of Ebola virus in Western Africa and the recent 2016 spread of Zika virus in the Americas, discussion of what constitutes a public health emergency and how new in vitro diagnostic devices are authorized for emergency use in the U.S. are also included. The majority of the Review is then subdivided around the sensing of bacterial, viral, and toxin biothreats with each including an overview of the major agents in that class, a detailed cross-section of different sensing methods in development based on assay format or analytical technique, and some discussion of related microfluidic lab-on-a-chip/point-of-care devices. Finally, an outlook is given on how this field will develop from the perspective of the biosensing technology itself and the new emerging threats they may face.
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Affiliation(s)
- Scott A. Walper
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Guillermo Lasarte Aragonés
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- College of Science, George Mason University Fairfax, Virginia 22030, United States
| | - Kim E. Sapsford
- OMPT/CDRH/OIR/DMD Bacterial Respiratory and Medical Countermeasures Branch, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | - Carl W. Brown
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- College of Science, George Mason University Fairfax, Virginia 22030, United States
| | - Clare E. Rowland
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- National Research Council, Washington, D.C. 20036, United States
| | - Joyce C. Breger
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Igor L. Medintz
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
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24
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Anderson GP, Shriver-Lake LC, Walper SA, Ashford L, Zabetakis D, Liu JL, Breger JC, Brozozog Lee PA, Goldman ER. Genetic Fusion of an Anti-BclA Single-Domain Antibody with Beta Galactosidase. Antibodies (Basel) 2018; 7:antib7040036. [PMID: 31544886 PMCID: PMC6698959 DOI: 10.3390/antib7040036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 09/26/2018] [Accepted: 09/27/2018] [Indexed: 02/06/2023] Open
Abstract
The Bacillus collagen-like protein of anthracis (BclA), found in Bacillus anthracis spores, is an attractive target for immunoassays. Previously, using phage display we had selected llama-derived single-domain antibodies that bound to B. anthracis spore proteins including BclA. Single-domain antibodies (sdAbs), the recombinantly expressed heavy domains from the unique heavy-chain-only antibodies found in camelids, provide stable and well-expressed binding elements with excellent affinity. In addition, sdAbs offer the important advantage that they can be tailored for specific applications through protein engineering. A fusion of a BclA targeting sdAb with the enzyme Beta galactosidase (β-gal) would enable highly sensitive immunoassays with no need for a secondary reagent. First, we evaluated five anti-BclA sdAbs, including four that had been previously identified but not characterized. Each was tested to determine its binding affinity, melting temperature, producibility, and ability to function as both capture and reporter in sandwich assays for BclA. The sdAb with the best combination of properties was constructed as a fusion with β-gal and shown to enable sensitive detection. This fusion has the potential to be incorporated into highly sensitive assays for the detection of anthrax spores.
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Affiliation(s)
- George P Anderson
- Naval Research Laboratory, Center for Biomolecular Science and Engineering, Washington, DC 20375, USA.
| | - Lisa C Shriver-Lake
- Naval Research Laboratory, Center for Biomolecular Science and Engineering, Washington, DC 20375, USA.
| | - Scott A Walper
- Naval Research Laboratory, Center for Biomolecular Science and Engineering, Washington, DC 20375, USA.
| | - Lauryn Ashford
- The Washington Center for Internships and Academic Seminars, 1333 16th Street N.W., Washington, DC 20036, USA.
| | - Dan Zabetakis
- Naval Research Laboratory, Center for Biomolecular Science and Engineering, Washington, DC 20375, USA.
| | - Jinny L Liu
- Naval Research Laboratory, Center for Biomolecular Science and Engineering, Washington, DC 20375, USA.
| | - Joyce C Breger
- Naval Research Laboratory, Center for Biomolecular Science and Engineering, Washington, DC 20375, USA.
| | | | - Ellen R Goldman
- Naval Research Laboratory, Center for Biomolecular Science and Engineering, Washington, DC 20375, USA.
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25
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Wu D, Dinh TL, Bausk BP, Walt DR. Long-Term Measurements of Human Inflammatory Cytokines Reveal Complex Baseline Variations between Individuals. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 187:2620-2626. [PMID: 28919109 DOI: 10.1016/j.ajpath.2017.08.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 07/25/2017] [Accepted: 08/01/2017] [Indexed: 11/29/2022]
Abstract
Comprehensive characterization of the healthy human proteome baseline is essential for personalized medicine. Baseline data are necessary to understand the variation between individuals, as well as longitudinal variation within individuals. Many important protein biomarkers, such as cytokines, exist at extremely low or undetectable levels in the healthy state. This paper describes results from a 14-week study of healthy human subjects using ultrasensitive single-molecule array (Simoa) assays to measure both intra and intersubject variation of 15 cytokines. The results show a wide variation in the ranges of some cytokines between individuals and demonstrate that individual baseline values will be essential for predicting disease presence and progression. Although all of the studied cytokines demonstrated high temporal stability (or low intrasubject variation) over the entire study period, there were two distinct groups of cytokines that demonstrated either high (IL-8, IFN-γ, IL-2, IL-6, and IL-1β) or low (IL-15, TNF-α, IL-12 p70, IL-17A, GM-CSF, IL-12 p40, IL-10, IL-7, IL-1α, and IL-5) subject-to-subject variation. This work demonstrates that ultrasensitive assays are essential for characterizing human cytokines in healthy subjects. The results show that some cytokines vary by more than two orders of magnitude between individuals, making it an imperative to obtain individual baseline measurements if they are to play a role in health and disease diagnosis.
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Affiliation(s)
- Danlu Wu
- Department of Chemistry, School of Arts and Sciences, Tufts University, Medford, Massachusetts
| | - Trinh L Dinh
- Department of Chemistry, School of Arts and Sciences, Tufts University, Medford, Massachusetts
| | - Bruce P Bausk
- Department of Chemistry, School of Arts and Sciences, Tufts University, Medford, Massachusetts
| | - David R Walt
- Department of Chemistry, School of Arts and Sciences, Tufts University, Medford, Massachusetts.
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26
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Li CH, Xiao X, Tao J, Wang DM, Huang CZ, Zhen SJ. A graphene oxide-based strand displacement amplification platform for ricin detection using aptamer as recognition element. Biosens Bioelectron 2017; 91:149-154. [PMID: 28006682 DOI: 10.1016/j.bios.2016.12.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Revised: 11/24/2016] [Accepted: 12/05/2016] [Indexed: 12/21/2022]
Abstract
The toxic plant protein ricin is a potential agent for criminal or bioterrorist attacks due to the wide availability and relative ease of preparation. Herein, we developed a novel strategy for the detection of ricin B-chain (RTB) based on isothermal strand-displacement polymerase reaction (ISDPR) by using aptamer as a recognition element and graphene oxide (GO) as a low background platform. In this method, ricin-binding aptamer (RBA) hybridized with a short blocker firstly, and then was immobilized on the surface of streptavidin-coated magnetic beads (MBs). The addition of RTB could release the blocker, which could hybridize with the dye-modified hairpin probe and trigger the ISDPR, resulting in high fluorescence intensity. In the absence of RTB, however, the fluorescence of the dye could be quenched strongly by GO, resulting in the extremely low background signal. Thus, RTB could be sensitively detected by the significantly increased fluorescence signal. The linear range of the current analytical system was from 0.75μg/mL to 100μg/mL and the limit of detection (3σ) was 0.6μg/mL. This method has been successfully utilized for the detection of both the RTB and the entire ricin toxin in real samples, and it could be generalized to any kind of target detection based on an appropriate aptamer.
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Affiliation(s)
- Chun Hong Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715 Chongqing, PR China
| | - Xue Xiao
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715 Chongqing, PR China
| | - Jing Tao
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715 Chongqing, PR China
| | - Dong Mei Wang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715 Chongqing, PR China
| | - Cheng Zhi Huang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715 Chongqing, PR China; College of Pharmaceutical Sciences, Southwest University, 400715 Chongqing, PR China.
| | - Shu Jun Zhen
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715 Chongqing, PR China.
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27
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Hu Q, Ma K, Mei Y, He M, Kong J, Zhang X. Metal-to-ligand charge-transfer: Applications to visual detection of β-galactosidase activity and sandwich immunoassay. Talanta 2017; 167:253-259. [PMID: 28340718 DOI: 10.1016/j.talanta.2017.02.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 02/07/2017] [Accepted: 02/10/2017] [Indexed: 12/22/2022]
Abstract
In this work, we report a novel use of the distinctive metal-to-ligand charge-transfer (MLCT) absorption properties of the chromogenic Fe(BPDS)34- (BPDS=bathophenanthroline disulfonic acid) reporter for the visual detection of β-galactosidase (β-Gal) activity and sandwich immunoassay. The enzymatic hydrolysis of the substrate p-aminophenyl-β-D-galactopyranoside can switch on the reduction of Fe3+ to Fe2+ and the subsequent complexation of Fe2+ with the BPDS ligand to generate the Fe(BPDS)34- reporter, leading to the appearance of the intense MLCT absorption band at 535nm and the colorless-to-red color change of the solution. Simply through a single step, the activity of β-Gal can be sensitively and selectively detected within the dynamic range of 0-220mUmL-1, with a limit of detection (LOD) of 1.69mUmL-1. This approach is applicable for the visual detection of β-Gal activities in the presence of complex human serum samples. Besides, when integrated with the sandwich immunoassay of carcinoembryonic antigen, a LOD of 1.16ngmL-1 can be achieved. In light of its prominent simplicity and practicality, our MLCT-based approach holds great potential in diagnostic and analytical applications.
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Affiliation(s)
- Qiong Hu
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Kefeng Ma
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Yaqi Mei
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Minhui He
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Jinming Kong
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China.
| | - Xueji Zhang
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China; Chemistry Department, College of Arts and Sciences, University of South Florida, East Fowler Ave, Tampa, Florida 33620-4202, United States.
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28
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Biological toxins of potential bioterrorism risk: Current status of detection and identification technology. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.05.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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29
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Dinh TL, Ngan KC, Shoemaker CB, Walt DR. Using Antigen–antibody Binding Kinetic Parameters to Understand Single-Molecule Array Immunoassay Performance. Anal Chem 2016; 88:11335-11339. [DOI: 10.1021/acs.analchem.6b03192] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Trinh L. Dinh
- Department
of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Kevin C. Ngan
- Department
of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Charles B. Shoemaker
- Department
of Infectious Disease and Global Health, Tufts Cummings School of Veterinary Medicine, Grafton, Massachusetts 01536, United States
| | - David R. Walt
- Department
of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
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30
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Abstract
Over the last decade, femtoliter arrays have been used as a simple and robust way to encapsulate and monitor the kinetics of single enzyme molecules. Encapsulating individual enzyme molecules within a femtoliter-sized reaction chamber does not require immobilization of the enzyme molecules or fluorescent tagging of the enzyme molecules, which offers the unique advantage of observing unmodified single enzyme molecules free in solution. Several fascinating details about enzyme kinetics have been revealed using these femtoliter arrays, which were unattainable from traditional ensemble experiments. Here, we discuss various considerations to take into account when developing single-molecule enzyme assays in femtoliter arrays and the advantages and disadvantages of various protocols.
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Affiliation(s)
| | - D R Walt
- Tufts University, Medford, MA, United States.
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31
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Rapid and ultrasensitive detection of botulinum neurotoxin serotype A1 in human serum and urine using single-molecule array method. Forensic Toxicol 2016. [DOI: 10.1007/s11419-016-0336-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Wu D, Katilius E, Olivas E, Dumont Milutinovic M, Walt DR. Incorporation of Slow Off-Rate Modified Aptamers Reagents in Single Molecule Array Assays for Cytokine Detection with Ultrahigh Sensitivity. Anal Chem 2016; 88:8385-9. [PMID: 27529794 DOI: 10.1021/acs.analchem.6b02451] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Slow off-rate modified aptamers (SOMAmers) are attractive protein recognition reagents due to their high binding affinities, stable chemical structures, easy production, and established selection process. Here, biotinylated SOMAmer reagents were incorporated into single molecule array (Simoa)-based assays in place of traditional detection antibodies for six cytokine targets. Optimization and validation were conducted for TNF-α as a demonstration using a capture antibody/detection-SOMAmer detection scheme to highlight the performance of this approach. The optimized assay has a broad dynamic range (>4 log10 units) and an ultralow detection limit of 0.67 fM (0.012 pg/mL). These results show comparable sensitivity to our antibody pair-based Simoa assays, and tens to thousands-fold enhancement in sensitivity compared with conventional ELISAs. High recovery percentages were observed in a spike-recovery test using human sera, demonstrating the feasibility of this novel Simoa assay in detecting TNF-α in clinically relevant samples. Detection SOMAmers were also used to detect other cytokines, such as IFN-γ, IL-1β, IL-2, IL-6, and IL-10, in human samples. Although not yet demonstrated, in principle it should be possible to eventually replace both the capture and detector antibodies with corresponding SOMAmer pairs in sandwich immunoassays. The combination of the ultrasensitive Simoa platform with the higher reliability of SOMAmer binding reagents will greatly benefit both biomarker discovery and disease diagnostic fields.
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Affiliation(s)
- Danlu Wu
- Department of Chemistry, Tufts University , 62 Talbot Avenue, Medford, Massachusetts 02155, United States
| | - Evaldas Katilius
- SomaLogic, Inc. , 2945 Wilderness Place, Boulder, Colorado 80301, United States
| | - Edgar Olivas
- SomaLogic, Inc. , 2945 Wilderness Place, Boulder, Colorado 80301, United States
| | - Milena Dumont Milutinovic
- Department of Chemistry, Tufts University , 62 Talbot Avenue, Medford, Massachusetts 02155, United States
| | - David R Walt
- Department of Chemistry, Tufts University , 62 Talbot Avenue, Medford, Massachusetts 02155, United States
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33
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Gooding JJ, Gaus K. Single‐Molecule Sensors: Challenges and Opportunities for Quantitative Analysis. Angew Chem Int Ed Engl 2016; 55:11354-66. [DOI: 10.1002/anie.201600495] [Citation(s) in RCA: 183] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Revised: 04/17/2016] [Indexed: 11/09/2022]
Affiliation(s)
- J. Justin Gooding
- The University of New South Wales School of Chemistry, Australian Centre for NanoMedicine and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, UNSW Sydney 2052 Australia
| | - Katharina Gaus
- The University of New South Wales EMBL Australia Node in Single Molecule Science ARC Centre of Excellence in Advanced Molecular Imaging Sydney 2052 Australia
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34
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Gooding JJ, Gaus K. Einzelmolekül‐Sensoren: Herausforderungen und Möglichkeiten für die quantitative Analyse. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600495] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- J. Justin Gooding
- The University of New South Wales School of Chemistry, Australian Centre for NanoMedicine and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, UNSW Sydney 2052 Australien
| | - Katharina Gaus
- The University of New South Wales EMBL Australia Node in Single Molecule Science and ARC Centre of Excellence in Advanced Molecular Imaging,UNSW Sydney 2052 Australien
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35
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Exonuclease III-assisted graphene oxide amplified fluorescence anisotropy strategy for ricin detection. Biosens Bioelectron 2016; 85:822-827. [PMID: 27295569 DOI: 10.1016/j.bios.2016.05.091] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 05/23/2016] [Accepted: 05/30/2016] [Indexed: 11/23/2022]
Abstract
Graphene oxide (GO) is an excellent fluorescence anisotropy (FA) amplifier. However, in the conventional GO amplified FA strategy, one target can only induce the FA change of one fluorophore on probe, which limits the detection sensitivity. Herein, we developed an exonuclease III (Exo III) aided GO amplified FA strategy by using aptamer as an recognition element and ricin B-chain as a proof-of-concept target. The aptamer was hybridized with a blocker sequence and linked onto the surface of magnetic beads (MBs). Upon the addition of ricin B-chain, blocker was released from the surface of MBs and hybridized with the dye-modified probe DNA on the surface of GO through the toehold-mediated strand exchange reaction. The formed blocker-probe DNA duplex triggered the Exo III-assisted cyclic signal amplification by repeating the hybridization and digestion of probe DNA, liberating the fluorophore with several nucleotides (low FA value). Thus, ricin B-chain could be sensitively detected by the significantly decreased FA. The linear range was from 1.0μg/mL to 13.3μg/mL and the limit of detection (LOD) was 400ng/mL. This method improved the sensitivity of FA assay and it could be generalized to any kind of target detection based on the use of an appropriate aptamer.
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36
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Bandodkar AJ, Jeerapan I, Wang J. Wearable Chemical Sensors: Present Challenges and Future Prospects. ACS Sens 2016. [DOI: 10.1021/acssensors.6b00250] [Citation(s) in RCA: 496] [Impact Index Per Article: 62.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Amay J. Bandodkar
- Department
of NanoEngineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Itthipon Jeerapan
- Department
of NanoEngineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Joseph Wang
- Department
of NanoEngineering, University of California, San Diego, La Jolla, California 92093, United States
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37
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A biolayer interferometry-based assay for rapid and highly sensitive detection of biowarfare agents. Anal Biochem 2016; 506:22-7. [PMID: 27156814 DOI: 10.1016/j.ab.2016.04.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 04/19/2016] [Accepted: 04/21/2016] [Indexed: 01/15/2023]
Abstract
Biolayer interferometry (BLI) is an optical technique that uses fiber-optic biosensors for label-free real-time monitoring of protein-protein interactions. In this study, we coupled the advantages of the Octet Red BLI system (automation, fluidics-free, and on-line monitoring) with a signal enhancement step and developed a rapid and sensitive immunological-based method for detection of biowarfare agents. As a proof of concept, we chose to demonstrate the efficacy of this novel assay for the detection of agents representing two classes of biothreats, proteinaceous toxins, and bacterial pathogens: ricin, a lethal plant toxin, and the gram-negative bacterium Francisella tularensis, the causative agent of tularemia. The assay setup consisted of biotinylated antibodies immobilized to the biosensor coupled with alkaline phosphatase-labeled antibodies as the detection moiety to create nonsoluble substrate crystals that precipitate on the sensor surface, thereby inducing a significant wavelength interference. It was found that this BLI-based assay enables sensitive detection of these pathogens (detection limits of 10 pg/ml and 1 × 10(4) pfu/ml ricin and F. tularensis, respectively) within a very short time frame (17 min). Owing to its simplicity, this assay can be easily adapted to detect other analytes in general, and biowarfare agents in particular, in a rapid and sensitive manner.
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38
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Esteban-Fernández de Ávila B, Lopez-Ramirez MA, Báez DF, Jodra A, Singh VV, Kaufmann K, Wang J. Aptamer-Modified Graphene-Based Catalytic Micromotors: Off–On Fluorescent Detection of Ricin. ACS Sens 2016. [DOI: 10.1021/acssensors.5b00300] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
| | - Miguel Angel Lopez-Ramirez
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Daniela F. Báez
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Adrian Jodra
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Virendra V. Singh
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Kevin Kaufmann
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Joseph Wang
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States
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39
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An International Proficiency Test to Detect, Identify and Quantify Ricin in Complex Matrices. Toxins (Basel) 2015; 7:4987-5010. [PMID: 26703726 PMCID: PMC4690109 DOI: 10.3390/toxins7124859] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 11/08/2015] [Accepted: 11/16/2015] [Indexed: 12/14/2022] Open
Abstract
While natural intoxications with seeds of Ricinus communis (R. communis) have long been known, the toxic protein ricin contained in the seeds is of major concern since it attracts attention of those intending criminal, terroristic and military misuse. In order to harmonize detection capabilities in expert laboratories, an international proficiency test was organized that aimed at identifying good analytical practices (qualitative measurements) and determining a consensus concentration on a highly pure ricin reference material (quantitative measurements). Sample materials included highly pure ricin as well as the related R. communis agglutinin (RCA120) spiked into buffer, milk and meat extract; additionally, an organic fertilizer naturally contaminated with R. communis shred was investigated in the proficiency test. The qualitative results showed that either a suitable combination of immunological, mass spectrometry (MS)-based and functional approaches or sophisticated MS-based approaches alone successfully allowed the detection and identification of ricin in all samples. In terms of quantification, it was possible to determine a consensus concentration of the highly pure ricin reference material. The results provide a basis for further steps in quality assurance and improve biopreparedness in expert laboratories worldwide.
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40
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Worbs S, Skiba M, Söderström M, Rapinoja ML, Zeleny R, Russmann H, Schimmel H, Vanninen P, Fredriksson SÅ, Dorner BG. Characterization of Ricin and R. communis Agglutinin Reference Materials. Toxins (Basel) 2015; 7:4906-34. [PMID: 26703723 PMCID: PMC4690106 DOI: 10.3390/toxins7124856] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 10/07/2015] [Accepted: 10/22/2015] [Indexed: 12/12/2022] Open
Abstract
Ricinus communis intoxications have been known for centuries and were attributed to the toxic protein ricin. Due to its toxicity, availability, ease of preparation, and the lack of medical countermeasures, ricin attracted interest as a potential biological warfare agent. While different technologies for ricin analysis have been established, hardly any universally agreed-upon "gold standards" are available. Expert laboratories currently use differently purified in-house materials, making any comparison of accuracy and sensitivity of different methods nearly impossible. Technically challenging is the discrimination of ricin from R. communis agglutinin (RCA120), a less toxic but highly homologous protein also contained in R. communis. Here, we established both highly pure ricin and RCA120 reference materials which were extensively characterized by gel electrophoresis, liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI MS/MS), and matrix-assisted laser desorption ionization-time of flight approaches as well as immunological and functional techniques. Purity reached >97% for ricin and >99% for RCA120. Different isoforms of ricin and RCA120 were identified unambiguously and distinguished by LC-ESI MS/MS. In terms of function, a real-time cytotoxicity assay showed that ricin is approximately 300-fold more toxic than RCA120. The highly pure ricin and RCA120 reference materials were used to conduct an international proficiency test.
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Affiliation(s)
- Sylvia Worbs
- Biological Toxins, Centre for Biological Threats and Special Pathogens, Robert Koch Institute, Seestr. 10, 13353 Berlin, Germany.
| | - Martin Skiba
- Biological Toxins, Centre for Biological Threats and Special Pathogens, Robert Koch Institute, Seestr. 10, 13353 Berlin, Germany.
| | - Martin Söderström
- VERIFIN (Finnish Institute for Verification of the ChemicalWeapons Convention), Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, Helsinki 05600, Finland.
| | - Marja-Leena Rapinoja
- VERIFIN (Finnish Institute for Verification of the ChemicalWeapons Convention), Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, Helsinki 05600, Finland.
| | - Reinhard Zeleny
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, 2440 Geel, Belgium.
| | - Heiko Russmann
- Bundeswehr Research Institute for Protective Technologies and NBC Protection, Humboldtstr. 100, 29633 Munster, Germany.
| | - Heinz Schimmel
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, 2440 Geel, Belgium.
| | - Paula Vanninen
- VERIFIN (Finnish Institute for Verification of the ChemicalWeapons Convention), Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, Helsinki 05600, Finland.
| | - Sten-Åke Fredriksson
- FOI, Swedish Defence Research Agency, CBRN Defence and Security, Cementvagen 20, 901 82 Umeå, Sweden.
| | - Brigitte G Dorner
- Biological Toxins, Centre for Biological Threats and Special Pathogens, Robert Koch Institute, Seestr. 10, 13353 Berlin, Germany.
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