1
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Yang J, Quan Y, Ouyang Y, Tan KO, Weber RT, Griffin RG, Raines RT. Peptidic "Molecular Beacon" for Collagen. Biomacromolecules 2024. [PMID: 39225003 DOI: 10.1021/acs.biomac.4c01000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Collagen-mimetic peptides (CMP) have been invaluable tools for understanding the structure and function of collagen, which is the most abundant protein in animals. CMPs have also been developed as probes that detect damaged collagen because of the specificity required to form a collagen triple helix. These probes are not, however, ratiometric. Here, we used EPR spectroscopy to determine the end-to-end distances of CMPs that do not form stable homotrimeric helices. We found that those distances are shorter than the distances in the context of a collagen triple helix, suggesting their potential utility as a "molecular beacon" and guiding the choice and location of a pendant fluorophore-quencher pair. We then showed that a molecular beacon based on a glycine-(2S,4S)-4-fluoroproline-(2S,4R)-4-hydroxyproline tripeptide repeat and EDANS-DABCYL pair enabled the ratiometric detection of its binding to both other CMPs and natural mammalian collagen. These results provide guidance for the development of a new modality for detecting damaged collagen in physiological settings.
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Affiliation(s)
- Jinyi Yang
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Yifan Quan
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Yifu Ouyang
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Kong Ooi Tan
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Ralph T Weber
- Bruker Biospin Corporation, Billerica, Massachusetts 01821, United States
| | - Robert G Griffin
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Ronald T Raines
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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2
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Shi J, Li S, Shao R, Jiang Y, Qiao Y, Liu J, Zhou Y, Li Y. Electrochemiluminescence aptasensing method for ultrasensitive determination of lipopolysaccharide based on CRISPR-Cas12a accessory cleavage activity. Talanta 2024; 272:125828. [PMID: 38428132 DOI: 10.1016/j.talanta.2024.125828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 02/17/2024] [Accepted: 02/22/2024] [Indexed: 03/03/2024]
Abstract
In this study, an ultrasensitive electrochemiluminescence (ECL) aptasensing method was developed for lipopolysaccharide (LPS) determination based on CRISPR-Cas12a accessory cleavage activity. Tris (2,2'-bipyridine) dichlororuthenium (II) (Ru(bpy)32+) was adsorbed on the surface of a glassy carbon electrode (GCE) coated with a mixture of gold nanoparticles (AuNPs) and Nafion film via electrostatic interaction. The obtained ECL platform (Ru(bpy)32+/AuNP/Nafion/GCE) exhibited strong ECL emission. Thiol-functionalized single-stranded DNA (ssDNA) was modified with a ferrocenyl (Fc) group and autonomously assembled on the ECL platform of Ru(bpy)32+/AuNP/Nafion/GCE via thiol-gold bonding, resulting in the quenching of ECL emission. After hybridization of the LPS aptamer strand (AS) with its partial complementary strand (CS), the formed double-stranded DNA (dsDNA) could activate CRISPR-Cas12a to indiscriminately cleave ssDNA-Fc on the surface of Ru(bpy)32+/AuNP/Nafion/GCE, resulting in recovery of the ECL intensity of Ru(bpy)32+ due to the increasing distance between Fc and the electrode surface. The combination of LPS and AS suppressed the formation of dsDNA, inhibited the activation of CRISPR-Cas12a, and prevented further cleavage of ssDNA-Fc. This mechanism aided in upholding the integrity of ssDNA-Fc on the surface of the electrode and was combined with ECL quenching induced by the target. The ECL intensity decreased linearly as the concentration of LPS increased from 1 to 50,000 pg/mL and followed a logarithmic relationship. This method exhibited a remarkably low detection limit of 0.24 pg/mL, which meets the requirement for low-concentration detection of LPS in the human body. The proposed method demonstrates the capacity of CRISPR-Cas12a to perform non-specific cutting of single-stranded DNA and transform the resultant cutting substances into changes in the ECL signal. By amalgamating this approach with the distinct identification abilities of LPS and its aptamers, a simple, responsive, and discriminatory LPS assay was established that holds immense significance for clinical diagnosis.
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Affiliation(s)
- Jiayue Shi
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China
| | - Sijia Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China
| | - Rongguang Shao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China
| | - Yang Jiang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China
| | - Yanxia Qiao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China
| | - Jin Liu
- Shaanxi Key Laboratory of Catalysis, School of Chemistry and Environment Science, Shaanxi University of Technology, Hanzhong, Shaanxi, 723000, China.
| | - Yaqian Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China.
| | - Yan Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China.
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3
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Kimoto H, Takahashi M, Masuko M, Sato K, Hirahara Y, Iiyama M, Suzuki Y, Hashimoto T, Hayashita T. High-Throughput Analysis of Bacterial Toxic Lipopolysaccharide in Water by Dual-Wavelength Monitoring Using a Ratiometric Fluorescent Chemosensor. Anal Chem 2023; 95:12349-12357. [PMID: 37524054 PMCID: PMC10448884 DOI: 10.1021/acs.analchem.3c01870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 07/20/2023] [Indexed: 08/02/2023]
Abstract
Lipopolysaccharide (LPS) is a bacterial toxin that causes fever in humans. Our small-molecule chemosensor named Zn-dpa-C2OPy shows rapid ratiometric fluorescence response to LPS in water with a detection limit of 11 pM, which is lower than that of our previously reported sensor. Spectroscopic measurements (fluorescence, absorbance, 1H NMR, and fluorescence lifetime), dynamic light scattering measurements, and transmission electron microscopy observations revealed that the fluorescence response was induced by the changes in the aggregation state via multi-point recognition of LPS through hydrophobic and electrostatic interactions, in addition to the coordination between the zinc(II)-dipicolylamine moiety of the chemosensor and the phosphate group of LPS. The proposed Zn-dpa-C2OPy chemosensor was applied to an original flow injection analysis (FIA) system with a self-developed dual-wavelength fluorophotometer, and a high throughput of 36 samples per hour was achieved. These results demonstrate the feasibility of this unique methodology combining a ratiometric fluorescent chemosensor and FIA for continuous online monitoring of LPS in water.
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Affiliation(s)
- Hiroshi Kimoto
- Graduate
School of Science and Technology, Sophia
University, Tokyo 102-8554, Japan
- Technical
Development Division, Nomura Micro Science
Co., Ltd., Atsugi, Kanagawa 243-0021, Japan
| | - Moeka Takahashi
- Department
of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, Japan
| | - Masakage Masuko
- Graduate
School of Science and Technology, Sophia
University, Tokyo 102-8554, Japan
| | - Kai Sato
- Graduate
School of Science and Technology, Sophia
University, Tokyo 102-8554, Japan
| | - Yuya Hirahara
- Graduate
School of Science and Technology, Sophia
University, Tokyo 102-8554, Japan
- Technical
Development Division, Nomura Micro Science
Co., Ltd., Atsugi, Kanagawa 243-0021, Japan
| | - Masamitsu Iiyama
- Technical
Development Division, Nomura Micro Science
Co., Ltd., Atsugi, Kanagawa 243-0021, Japan
| | - Yota Suzuki
- Department
of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, Japan
- Graduate
School of Science and Engineering, Saitama
University, Saitama 338-8570, Japan
| | - Takeshi Hashimoto
- Department
of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, Japan
| | - Takashi Hayashita
- Department
of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, Japan
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4
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Madhu M, Krishna Kumar AS, Lu CY, Tseng WL. Peptide-modified carbon dot aggregates for ultrasensitive detection of lipopolysaccharide through aggregation-induced emission enhancement. Talanta 2023; 253:123851. [PMID: 36108518 DOI: 10.1016/j.talanta.2022.123851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 08/06/2022] [Accepted: 08/12/2022] [Indexed: 12/13/2022]
Abstract
This study fabricated yellow-emitting CDs (Y-CDs) by hydrothermal treatment of citric acid and urea and applied them as a fluorescence turn-on platform for sensitive and selective detection of lipopolysaccharide (LPS) based on the non-shifted AIEE of peptide-stabilized CD aggregates. The designed peptide (named K3) consisting of aggregation-active and LPS-recognition units triggered the aggregation of Y-CDs, switching on their fluorescence through the blue-shifted AIEE process. The formed K3-stabilized Y-CD aggregates (K3-YCDAs) specifically interacted with LPS at neutral pH, demonstrating that the sequence of the decorated peptide was highly connected with their selectivity and sensitivity. The K3-YCDAs provided a fast response time (within 5 min) to detect LPS with a quantification range of 0.5-100.0 nM and a limit of detection (LOD, signal-to-noise ratio of 3) of 300.0 pM. By integrating ultrafiltration membranes as a concentration device with K3-YCDAs as a sensing probe, the LOD for LPS was further reduced to 3.0 pM. The determination of picomolar levels of plasma LPS by the K3-YCDAs coupled to the centrifugation ultrafiltration was demonstrated to fall within the specificity range of clinical interest for sepsis patients. Also, the K3-YCDAs served as a fluorescent probe to selectively image and quantify E. coli cells. The distinct advantages of the K3-YCDAs for LPS include fast response time, wide linear range, low detection limit, and excellent selectivity compared to previously reported sensors.
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Affiliation(s)
- Manivannan Madhu
- Department of Chemistry, National Sun Yat-sen University, No. 70 Lienhai Rd., Kaohsiung, 80424, Taiwan
| | - A Santhana Krishna Kumar
- Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Poland
| | - Chi-Yu Lu
- School of Pharmacy, Kaohsiung Medical University, No. 100, Shiquan 1st Road, Sanmin District, Kaohsiung, 80708, Taiwan
| | - Wei-Lung Tseng
- Department of Chemistry, National Sun Yat-sen University, No. 70 Lienhai Rd., Kaohsiung, 80424, Taiwan; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, No.100, Shiquan 1st Rd., 80708, Kaohsiung, Taiwan.
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5
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Hu Q, Feng W, Liang Y, Liang Z, Cao X, Li S, Luo Y, Wan J, Ma Y, Han D, Niu L. Boronate Affinity-Amplified Electrochemical Aptasensing of Lipopolysaccharide. Anal Chem 2022; 94:17733-17738. [PMID: 36475636 DOI: 10.1021/acs.analchem.2c05004] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
As lipopolysaccharide (LPS) is closely associated with sepsis and other life-threatening conditions, the point-of-care (POC) detection of LPS is of significant importance to human health. In this work, we illustrate an electrochemical aptasensor for the POC detection of low-abundance LPS by utilizing boronate affinity (BA) as a simple, efficient, and cost-effective amplification strategy. Briefly, the BA-amplified electrochemical aptasensing of LPS involves the tethering of the aptamer receptors and the BA-mediated direct decoration of LPS with redox signal tags. As the polysaccharide chain of LPS contains hundreds of cis-diol sites, the covalent crosslinking between the phenylboronic acid group and cis-diol sites can be harnessed for the site-specific decoration of each LPS with hundreds of redox signal tags, thereby enabling amplified detection. As it involves only a single-step operation (∼15 min), the BA-mediated signal amplification holds the significant advantages of unrivaled simplicity, rapidness, and cost-effectiveness over the conventional nanomaterial- and enzyme-based strategies. The BA-amplified electrochemical aptasensor has been successfully applied to specifically detect LPS within 45 min, with a detection limit of 0.34 pg/mL. Moreover, the clinical utility has been validated based on LPS detection in complex serum samples. As a proof of concept, a portable device has been developed to showcase the potential applicability of the BA-amplified electrochemical LPS aptasensor in the POC testing. In view of its simplicity, rapidness, and cost-effectiveness, the BA-amplified electrochemical LPS aptasensor holds broad application prospects in the POC testing.
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Affiliation(s)
- Qiong Hu
- Guangzhou Key Laboratory of Sensing Materials and Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Wenxing Feng
- Guangzhou Key Laboratory of Sensing Materials and Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Yiyi Liang
- Guangzhou Key Laboratory of Sensing Materials and Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Zhiwen Liang
- Guangzhou Key Laboratory of Sensing Materials and Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Xiaojing Cao
- Guangzhou Key Laboratory of Sensing Materials and Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Shiqi Li
- Guangzhou Key Laboratory of Sensing Materials and Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Yilin Luo
- Guangzhou Key Laboratory of Sensing Materials and Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Jianwen Wan
- Guangzhou Key Laboratory of Sensing Materials and Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Yingming Ma
- Guangzhou Key Laboratory of Sensing Materials and Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Dongxue Han
- Guangzhou Key Laboratory of Sensing Materials and Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Li Niu
- Guangzhou Key Laboratory of Sensing Materials and Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
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6
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Gao ZF, Zheng LL, Dong LM, Li JZ, Shen Y, Chen P, Xia F. Label-Free Resonance Rayleigh Scattering Amplification for Lipopolysaccharide Detection and Logical Circuit by CRISPR/Cas12a-Driven Guanine Nanowire Assisted Non-Cross-Linking Hybridization Chain Reaction. Anal Chem 2022; 94:6371-6379. [DOI: 10.1021/acs.analchem.2c00848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Zhong Feng Gao
- Advanced Materials Institute, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250014, People’s Republic of China
- Collaborative Innovation Center of Tumor Marker Detection Technology, Equipment and Diagnosis-Therapy Integration in Universities of Shandong, Shandong Provincial Key Laboratory of Detection Technology for Tumor Markers, College of Chemistry and Chemical Engineering, Feixian Campus, Linyi University, Linyi 276005, People’s Republic of China
| | - Lin Lin Zheng
- Advanced Materials Institute, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250014, People’s Republic of China
- Collaborative Innovation Center of Tumor Marker Detection Technology, Equipment and Diagnosis-Therapy Integration in Universities of Shandong, Shandong Provincial Key Laboratory of Detection Technology for Tumor Markers, College of Chemistry and Chemical Engineering, Feixian Campus, Linyi University, Linyi 276005, People’s Republic of China
| | - Lu Ming Dong
- Collaborative Innovation Center of Tumor Marker Detection Technology, Equipment and Diagnosis-Therapy Integration in Universities of Shandong, Shandong Provincial Key Laboratory of Detection Technology for Tumor Markers, College of Chemistry and Chemical Engineering, Feixian Campus, Linyi University, Linyi 276005, People’s Republic of China
| | - Jin Ze Li
- Collaborative Innovation Center of Tumor Marker Detection Technology, Equipment and Diagnosis-Therapy Integration in Universities of Shandong, Shandong Provincial Key Laboratory of Detection Technology for Tumor Markers, College of Chemistry and Chemical Engineering, Feixian Campus, Linyi University, Linyi 276005, People’s Republic of China
| | - Yizhong Shen
- School of Food & Biological Engineering, Key Laboratory for Agricultural Products Processing of Anhui Province, Hefei University of Technology, Hefei 230009, People’s Republic of China
| | - Pu Chen
- Department of Chemical Engineering and Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L3G1, Canada
| | - Fan Xia
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, People’s Republic of China
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7
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Li Y, Yang X, Hou F, Chen D, Liu Y, Yu D, Ming D, Yang Y, Huang H. Near-Infrared-Fluorescent Probe for Turn-On Lipopolysaccharide Analysis Based on PEG-Modified Gold Nanorods with Plasmon-Enhanced Fluorescence. ACS APPLIED MATERIALS & INTERFACES 2021; 13:57058-57066. [PMID: 34784169 DOI: 10.1021/acsami.1c19746] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Lipopolysaccharide (LPS), as the major component of the outer membrane of Gram-negative bacteria, can trigger a variety of biological effects such as sepsis, septic shock, and even multiorgan failure. Herein, we developed a near-infrared-fluorescent probe for fluorescent turn-on analysis of LPS based on plasmon-enhanced fluorescence (PEF). Gold nanorods (Au NRs) modified polyethylene glycol (PEG) was used as PEF materials. Au NRs were prepared with different longitudinal surface plasmon resonance (LSPR), and their fluorescence enhancement was investigated. Three kinds of molecular weights (1000, 5000, and 10000) of polyethylene glycol (PEG) were employed to control the distance between the Au NRs and the fluorescence substances of cyanine 7 (Cy7). Experimental analysis showed that the enhancement was related to the spectral overlap between the plasmon resonance of Au NRs and the extinction/emission of fluorophore. The three-dimensional finite-difference time-domain (3D-FDTD) simulation further revealed that the enhancement was caused by local electric field enhancement. Furthermore, the probe was used for the ultrasensitive analysis of LPS with a detection limit of 3.85 ng/mL and could quickly distinguish the Gram-negative bacterium-Escherichia coli (E. coli) (with LPS in the membrane) from Gram-positive bacterium-Staphylococcus aureus (S. aureus) (without LPS), as well as quantitative determination of E. coli with a detection limit of 1.0 × 106 cfu/mL. These results suggested that the prepared probe has great potential for biomedical diagnosis and selective detection of LPS from different bacterial strains.
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Affiliation(s)
- Yiting Li
- College of Food and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
- College of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Xinyu Yang
- College of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Fan Hou
- College of Food and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Dong Chen
- College of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Yifan Liu
- College of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Dinghua Yu
- College of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Dengming Ming
- College of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Yaqiong Yang
- College of Food and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - He Huang
- College of Food and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
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8
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N K R, Kamali R V, Gorthi SS. A rapid aptamer-based fluorescence assay for the detection of lipopolysaccharides using SYBR Green I. LUMINESCENCE 2021; 36:1632-1637. [PMID: 34137155 DOI: 10.1002/bio.4104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 06/09/2021] [Accepted: 06/11/2021] [Indexed: 11/05/2022]
Abstract
Lipopolysaccharides (endotoxins), found on Gram-negative bacteria, can trigger a severe immune response in humans leading to septic shock and in extreme cases, even death. Therefore, the detection and neutralization of lipopolysaccharides (LPS) is of utmost importance in the pharmaceutical and medical industries. The United States Food and Drug Administration (US FDA) recommended detection method for LPS, the Limulus amebocyte lysate (LAL) assay, is expensive, time consuming, complex, and is prone to interference from proteases. As an alternative, this paper proposes a rapid, label-free fluorescence-based assay using LPS-specific aptamers and the SYBR Green DNA stain. The proposed method has a detection limit of 0.1 ng/ml, which is sufficient to detect the permissible levels of LPS in many pharmaceutical drugs and medical products. The fluorescence signal was found to be a linear function of the concentration of LPS in the range from 0.1 ng/ml to 105 ng/ml.
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Affiliation(s)
- Radhika N K
- Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, India
| | - Vishaalini Kamali R
- Department of Chemical Engineering, National Institute of Technology Karnataka, India
| | - Sai Siva Gorthi
- Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, India
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9
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Hydrazone ligation assisted DNAzyme walking nanomachine coupled with CRISPR-Cas12a for lipopolysaccharide analysis. Anal Chim Acta 2021; 1174:338747. [PMID: 34247734 DOI: 10.1016/j.aca.2021.338747] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/24/2021] [Accepted: 06/06/2021] [Indexed: 12/26/2022]
Abstract
In this work, hydrazone ligation assisted DNAzyme walking nanomachine is explored to couple with CRISPR-Cas12a trans-cleavage. Hydrazone ligation with high efficiency can mediate signal input which can be induced by target binding, thereby regulating the performance of DNAzyme walking nanomachine. The product strand from DNAzyme walking nanomachine can further activate the trans-cleavage of Cas12a. So, cascade signal amplification can be achieved to enhance the sensitivity for target detection. Subsequently, hydrazone ligation assisted DNAzyme walking nanomachine coupled with CRISPR-Cas12a has been further developed as a biosensor to analyze lipopolysaccharides. The developed biosensor exhibits a linear range from 0.05 ng/mL to 106 ng/mL and a lowest limit of detection of 7.31 fg/mL. This research provides a new mode for the signal output of DNAzyme walking nanomachine, so as to sensitively analyze different biomolecules.
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10
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Thakur M, Dan A. Poly-l-lysine-Functionalized Green-Light-Emitting Carbon Dots as a Fluorescence Turn-on Sensor for Ultrasensitive Detection of Endotoxin. ACS APPLIED BIO MATERIALS 2021; 4:3410-3422. [PMID: 35014425 DOI: 10.1021/acsabm.1c00006] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we report a facile, ultrasensitive, and selective fluorescence turn-on sensing strategy based on green-light-emitting functional nanodots for the detection of bacterial lipopolysaccharide (LPS) endotoxin. In this protocol, first, the pure carbon dots (CDs) with a fairly high quantum yield were prepared by microwave-assisted pyrolysis of citric acid in the presence of urea. Subsequently, the carboxyl-group-rich surfaces of the CDs were allowed to conjugate with the poly-l-lysine (PLL) using an EDC-NHS amidization method to obtain the PLL-modified CDs (PLL-CDs). The LPS could specifically bind to the PLL at the PLL-CD surfaces, and this binding enabled an electron transfer from the phosphate groups of LPS to the carbon core through the PLL bridge, thus resulting in a fluorescence enhancement. Interestingly, this fluorescent turn-on sensor provided a detection limit of 68.3 fM in PBS (pH 7.4), which is the lowest ever reported among all of the synthetic assays for LPS detection. Furthermore, our fluorescent probe was able to show a remarkable selectivity toward LPS over a range of commonly known interfering substances. Thus, this study demonstrated the feasibility of using specific LPS binding to PLL to drive molecular recognition in aqueous medium and offered an effective fluorescence turn-on sensing strategy to detect bacterial endotoxin in diverse clinical and biological applications.
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Affiliation(s)
- Meenakshi Thakur
- Department of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University - Chandigarh, Sector 14, Chandigarh 160014, India
| | - Abhijit Dan
- Department of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University - Chandigarh, Sector 14, Chandigarh 160014, India
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11
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Ma W, Liu L, Xu Y, Wang L, Chen L, Yan S, Shui L, Wang Z, Li S. A highly efficient preconcentration route for rapid and sensitive detection of endotoxin based on an electrochemical biosensor. Analyst 2021; 145:4204-4211. [PMID: 32459250 DOI: 10.1039/d0an00315h] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
An impedimetric aptasensor for the detection of endotoxin in a microfluidic chip was proposed, in which the Apt/AuNPs/SPCE sensing surface was fabricated in a screen-printed electrode with good biological activity and stability. The quantitative detection of endotoxin was accomplished by electrochemical impedance spectroscopy (EIS) measurement before and after exposing to samples. The impedance biosensor offers an ultrasensitive and selective detection of endotoxin down to 500 pg mL-1 with a wide linear range from 500 pg mL-1 to 200 ng mL-1. According to the Langmuir isotherm model, the interactions between the target molecules and the sensing surface had been analyzed and strong binding was concluded. Compared to the traditional static incubation methods, the microfluidic biosensor realizes the enrichment of endotoxin owing to the confined space and continuous flow nature, so that the lowest detection concentration is reduced from 5 ng mL-1 to 500 pg mL-1, which is much lower than the existing technology, and the total assay time is shortened from 1.0 h to 0.5 h. The proposed microfluidic impedance biosensor provides a new strategy for the design of an aptasensor to realize the rapid detection of target biomolecules with high sensitivity and it can be integrated into wearable medical devices due to its flexible properties.
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Affiliation(s)
- Wenrui Ma
- Key Disciplines Lab of Novel Micro-Nano Devices and System Technology & Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China. and International R & D center of Micro-nano Systems and New Materials Technology, Chongqing University, Shapingba, Chongqing 400044, China
| | - Lulu Liu
- International R & D center of Micro-nano Systems and New Materials Technology, Chongqing University, Shapingba, Chongqing 400044, China and School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Yi Xu
- Key Disciplines Lab of Novel Micro-Nano Devices and System Technology & Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China. and School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China and International R & D center of Micro-nano Systems and New Materials Technology, Chongqing University, Shapingba, Chongqing 400044, China
| | - Li Wang
- Key Disciplines Lab of Novel Micro-Nano Devices and System Technology & Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China. and International R & D center of Micro-nano Systems and New Materials Technology, Chongqing University, Shapingba, Chongqing 400044, China
| | - Li Chen
- Key Disciplines Lab of Novel Micro-Nano Devices and System Technology & Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China. and International R & D center of Micro-nano Systems and New Materials Technology, Chongqing University, Shapingba, Chongqing 400044, China
| | - Sheng Yan
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, P. R. China
| | - Lingling Shui
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Normal University, Guangzhou 510631, China
| | - Zhijun Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China
| | - Shunbo Li
- Key Disciplines Lab of Novel Micro-Nano Devices and System Technology & Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China. and International R & D center of Micro-nano Systems and New Materials Technology, Chongqing University, Shapingba, Chongqing 400044, China
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12
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Engineering Janus micromotors with WS2 and affinity peptides for turn-on fluorescent sensing of bacterial lipopolysaccharides. Biosens Bioelectron 2020; 165:112286. [DOI: 10.1016/j.bios.2020.112286] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/04/2020] [Accepted: 05/07/2020] [Indexed: 11/20/2022]
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13
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Photocatalytically renewable peptide-based electrochemical impedance method for sensing lipopolysaccharide. Mikrochim Acta 2020; 187:349. [PMID: 32462256 DOI: 10.1007/s00604-020-04321-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 05/14/2020] [Indexed: 10/24/2022]
Abstract
A peptide (Li5-025)-modified gold nanoparticle (AuNP)/(titania (TiO2) + 5,10,15,20-tetrakis(4-aminophenyl)-21H,23H-porphine (TAPP))/glassy carbon electrode (GCE) was developed for lipopolysaccharide (LPS) determination. This electrode not only performs well in the electrochemical impedance determination of LPS in serum but can also be easily regenerated under light irradiation. Using Fe(CN)63-/4- as a redox probe, LPS recognition can be indicated by the significantly increased electron-transfer resistance (Ret) as a result of the coaction of the increased steric hindrance from the peptide-LPS complex and the electrostatic repulsion between LPS and Fe(CN)63-/4-. The impedimetric signal was acquired in the frequency range 0.1 Hz ~ 100 kHz with an initial voltage of 174 mV and an amplitude of 10 mV. The resistance changes (ΔRet) are linearly related to the LPS concentrations in a broad range (0.1 pg mL-1 ~ 100 ng mL-1) with a low detection limit (0.08 pg mL-1). Importantly, the electrode shows high selectivity to LPS from Escherichia coli O55:B5 compared to other bacterial sources and considerable anti-interference to 0.1% fetal calf serum, demonstrating its potential application in clinically relevant samples. Another highlight is that the AuNP/(TiO2 + TAPP)/GCE surface can be photocatalytically regenerated under light irradiation (50 mW cm-2, 300-2500 nm) without any obvious damage to the electrode microstructure. After simple peptide re-immobilization, the regenerated electrode demonstrates LPS response similar to the peptide less one, and the deviation is only 2.89% after 5-cycle reuse. Graphical abstract A peptide (Li5-025)-modified AuNP/(TiO2 + TAPP porphine)/GCE was proposed, which not only has excellent electrochemical analytical performances for LPS assay in serum but also can be reused after light irradiation and subsequent peptide re-immobilization.
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14
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Reichart TM, Uzarski JR, Mello CM. Differential presentation of a single antimicrobial peptide is sufficient to identify LPS from distinct bacterial samples. Analyst 2019; 144:7242-7249. [PMID: 31687669 DOI: 10.1039/c9an01781j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Rapid detection and identification of bacteria is important for human health, biodefense, and food safety. Small arrays of different antimicrobial peptides (AMPs) enable the identification of lipopolysaccharide (LPS) samples from a variety of bacterial species and strains. A model system for examining how peptide presentation affects LPS detection is the sheep myeloid antimicrobial peptide (SMAP-29), which contains a helix-turn-helix motif. Varying the cysteine attachment site on SMAP-29 controls the three-dimensional presentation of the peptide on the surface, altering the ability of the peptide to discriminate between LPS samples. A small array of only SMAP-29 variants-and no other peptides-is capable of discriminating among LPS samples from multiple bacterial species, as well as between different strains within the same species, with high accuracy.
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Affiliation(s)
- Timothy M Reichart
- Office of the Chief Scientist, Combat Capabilities Development Command Soldier Center, Natick, MA 01760, USA.
| | - Joshua R Uzarski
- CB Innovative Material and Ensemble Development Team, Combat Capabilities Development Command, Natick, MA 01760, USA
| | - Charlene M Mello
- Office of the Chief Scientist, Combat Capabilities Development Command Soldier Center, Natick, MA 01760, USA.
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15
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Li Z, Luo F, Dai G, Lu Y, Ai S, He P, Wang Q. Microchip electrophoretic detection of bacterial lipopolysaccharide based on aptamer-modified magnetic beads and polymerase chain amplification. Microchem J 2019. [DOI: 10.1016/j.microc.2019.104178] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Detection of Gram-negative bacterial outer membrane vesicles using DNA aptamers. Sci Rep 2019; 9:13167. [PMID: 31511614 PMCID: PMC6739373 DOI: 10.1038/s41598-019-49755-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 08/23/2019] [Indexed: 12/03/2022] Open
Abstract
Infection of various pathogenic bacteria causes severe illness to human beings. Despite the research advances, current identification tools still exhibit limitations in detecting Gram-negative bacteria with high accuracy. In this study, we isolated single-stranded DNA aptamers against multiple Gram-negative bacterial species using Toggle-cell-SELEX (systemic evolution of ligands by exponential enrichment) and constructed an aptamer-based detection tool towards bacterial secretory cargo released from outer membranes of Gram-negative bacteria. Three Gram-negative bacteria, Escherichia coli DH5α, E. coli K12, and Serratia marcescens, were sequentially incubated with the pool of random DNA sequences at each SELEX loop. Two aptamers selected, GN6 and GN12, were 4.2-times and 3.6-times higher binding to 108 cells of Gram-negative bacteria than to Gram-positive bacteria tested, respectively. Using GN6 aptamer, we constructed an Enzyme-linked aptamer assay (ELAA) to detect bacterial outer membrane vesicles (OMVs) of Gram-negative bacteria, which contain several outer membrane proteins with potent immunostimulatory effects. The GN6-ELAA showed high sensitivity to detect as low as 25 ng/mL bacterial OMVs. Aptamers developed in this study show a great potential to facilitate medical diagnosis and early detection of bacterial terrorism, based on the ability to detect bacterial OMVs of multiple Gram-negative bacteria.
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17
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Gao X, Li H, Zhao Y, Jie G. Triple-helix molecular switch-based versatile "off-on" electrochemiluminescence and fluorescence biosensing platform for ultrasensitive detection of lipopolysaccharide by multiple-amplification strategy. Biosens Bioelectron 2019; 143:111602. [PMID: 31442756 DOI: 10.1016/j.bios.2019.111602] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 08/07/2019] [Accepted: 08/13/2019] [Indexed: 01/06/2023]
Abstract
Herein, a novel biosensing platform for versatile electrochemiluminescence (ECL) "off" and fluorescence (FL) "on" detection of lipopolysaccharide (LPS) with multiple-amplification strategy is proposed. The specific recognition of target to aptamer on the magnetic beads (MB) firstly released abundant DNA sequences of three kinds. The sequences hybridized with multifunctional molecular beacon (MMB) and initiated numerous bidirectional polymerization and shearing reactions, generating a large number of DNA fragments (a1) by multiple cycling amplification. Then a1 was introduced to the triple-helix sensing system, opening the triple-helix structure. In ECL system, the G-rich chains S2 were exposed to form G-quadruplex-hemin complex in the presence of hemin, which could efficiently quench ECL for "off" detection of LPS. In FL system, the fluorophore FAM and quencher BHQ on S1 chain were separated with opening of triple-helix structure, achieving fluorescence "on" signal for LPS assay. So the versatile platform can achieve greatly amplified ECL and FL signal changes for sensitive assay of LPS, showing wide linear ranges (0.1 fg/mL-0.1 ng/mL by ECL and 10 fg/mL-1-1 μg/mL by FL) and low detection limits (0.012 fg/mL by ECL and 1.269 fg/mL by FL). Therefore, the present ECL "Off" and FL "On" dual-signal detection patterns for LPS displayed many advantages over other reported methods, which provided an outlook for future applications in clinical diagnosis.
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Affiliation(s)
- Xiaoshan Gao
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering. Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Hongkun Li
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering. Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Yu Zhao
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering. Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Guifen Jie
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering. Qingdao University of Science and Technology, Qingdao, 266042, PR China.
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18
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Otri I, El Sayed S, Medaglia S, Martínez-Máñez R, Aznar E, Sancenón F. Simple Endotoxin Detection Using Polymyxin-B-Gated Nanoparticles. Chemistry 2019; 25:3770-3774. [PMID: 30688381 DOI: 10.1002/chem.201806306] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Indexed: 12/28/2022]
Abstract
A nanodevice based on mesoporous silica nanoparticles with rhodamine B in the pore framework, functionalized with carboxylates on the outer surface and capped with the cationic polymyxin B peptide, was used to selectively detect endotoxin in aqueous solutions with a limit of detection in the picomolar range.
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Affiliation(s)
- Ismael Otri
- Instituto Interuniversitario de Investigación de, Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain
| | - Sameh El Sayed
- Instituto Interuniversitario de Investigación de, Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain
| | - Serena Medaglia
- Instituto Interuniversitario de Investigación de, Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain
| | - Ramón Martínez-Máñez
- Instituto Interuniversitario de Investigación de, Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain
- Departamento de Química, Universitat Politècnica de Valencia, Camino de Vera s/n, 46022, Valencia, Spain
| | - Elena Aznar
- Instituto Interuniversitario de Investigación de, Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain
| | - Félix Sancenón
- Instituto Interuniversitario de Investigación de, Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain
- Departamento de Química, Universitat Politècnica de Valencia, Camino de Vera s/n, 46022, Valencia, Spain
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19
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Wen LX, Lv JJ, Chen L, Li SB, Mou XJ, Xu Y. A fluorescent probe composed of quantum dot labeled aptamer and graphene oxide for the determination of the lipopolysaccharide endotoxin. Mikrochim Acta 2019; 186:122. [PMID: 30666423 DOI: 10.1007/s00604-018-3218-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Accepted: 12/28/2018] [Indexed: 01/28/2023]
Abstract
Endotoxins are complex lipopolysaccharides (LPS) and key components of the outer cell membrane of Gram-negative bacteria. The authors report on a fluorescent aptamer-based probe for the determination of LPS of Gram-negative bacteria. An aptamer against LPS was fluorescently labeled with CdSe/ZnS quantum dots. Its emission is quenched on addition of graphene oxide (GO). On addition of LPS, the aptamer binds LPS and GO is released. This results in the recovery of fluorescence, typically measured at excitation/emission wavelengths of 495/543 nm. The probe responds to LPS in the 10-500 ng·mL-1 concentration range, and the detection limit is 8.7 ng·mL-1. It can be used for selective detection of LPS from different Gram-negative bacteria, in the presence of biological interferents. Graphical abstract Schematic presentation of a green fluorescent probe comprised of an aptamer labelled with CdSe/ZnS quantum dots and of graphene oxide. Lipopolysaccharides bind to the aptamer and release graphene oxide to result in fluorescence recovery, which is measured at an emission wavelength 543 nm.
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Affiliation(s)
- Lu-Xin Wen
- Key Disciplines Lab of Novel Micro-nano Devices and System Technology, Chongqing University, Chongqing, 400030, China
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, China
- National Center for International Research of Micro/Nano-System and New Material Technology, Chongqing University, Chongqing, 400030, China
| | - Jun-Jiang Lv
- Key Disciplines Lab of Novel Micro-nano Devices and System Technology, Chongqing University, Chongqing, 400030, China.
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, China.
- Collaborative Innovation Center for Brain Science, Chongqing University, Chongqing, 400030, People's Republic of China.
| | - Li Chen
- Key Disciplines Lab of Novel Micro-nano Devices and System Technology, Chongqing University, Chongqing, 400030, China
- National Center for International Research of Micro/Nano-System and New Material Technology, Chongqing University, Chongqing, 400030, China
| | - Shun-Bo Li
- Key Disciplines Lab of Novel Micro-nano Devices and System Technology, Chongqing University, Chongqing, 400030, China
- National Center for International Research of Micro/Nano-System and New Material Technology, Chongqing University, Chongqing, 400030, China
| | - Xiao-Jing Mou
- Key Disciplines Lab of Novel Micro-nano Devices and System Technology, Chongqing University, Chongqing, 400030, China
- National Center for International Research of Micro/Nano-System and New Material Technology, Chongqing University, Chongqing, 400030, China
| | - Yi Xu
- Key Disciplines Lab of Novel Micro-nano Devices and System Technology, Chongqing University, Chongqing, 400030, China.
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, China.
- National Center for International Research of Micro/Nano-System and New Material Technology, Chongqing University, Chongqing, 400030, China.
- Collaborative Innovation Center for Brain Science, Chongqing University, Chongqing, 400030, People's Republic of China.
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20
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Niu J, Hu X, Ouyang W, Chen Y, Liu S, Han J, Liu L. Femtomolar Detection of Lipopolysaccharide in Injectables and Serum Samples Using Aptamer-Coupled Reduced Graphene Oxide in a Continuous Injection-Electrostacking Biochip. Anal Chem 2019; 91:2360-2367. [PMID: 30576605 DOI: 10.1021/acs.analchem.8b05106] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A method for microfluidic sample preconcentration to detect femtomolar level of lipopolysaccharide (LPS) is introduced, enabled by 6-carboxyfluorescein (6-FAM) labeled aptamer-LPS binding along with reduced graphene oxide (rGO). The free FAM-aptamers can be adsorbed onto the surface of rGO, resulting in fluorescence quenching of background signals. Conversely, the aptamer-LPS complex cannot be adsorbed by rGO, so the fluorescence is maintained and detected. When an electric field is applied across the microchannel with Nafion membrane in the chip, only the fluorescence of aptamer-LPS complex can be detected and stacked by continuous injection-electrostacking (CI-ES). The method shows a high selectivity (in the presence of pyrophosphate, FAD+, NAD+, AMP, ADP, ATP, phosphatidylcholine, LTA, and β-d-glucans which respond positively to LAL) to LPS and an extreme sensitivity with the limit of detection (LOD) at 7.9 fM (7.9 × 10-4 EU/mL) and 8.3 fM (8.3 × 10-4 EU/mL) for water sample and serum sample, respectively. As a practical application, this method can detect LPS in injections and serum samples of human and sepsis model mouse and quickly distinguish Gram-negative bacteria Escherichia coli ( E. coli) from Gram-positive bacteria Staphylococcus aureus ( S. aureus) and fungus Candida albicans ( C. albicans). More importantly, by changing the aptamers based on different targets, we can detect different analytes. Therefore, aptamer-coupled rGO in a CI-ES biochip is a universal, sensitive, and specific method. For TOC only.
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Affiliation(s)
- Junxin Niu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences , Southern Medical University , Guangzhou 510515 , China
| | - Xiumei Hu
- Department of Laboratory Medicine, Nanfang Hospital , Southern Medical University , Guangzhou 510515 , China
| | - Wei Ouyang
- Department of Electrical Engineering and Computer Science , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Yue Chen
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences , Southern Medical University , Guangzhou 510515 , China
| | - Shuwen Liu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences , Southern Medical University , Guangzhou 510515 , China
| | - Jongyoon Han
- Department of Electrical Engineering and Computer Science , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States.,Department of Biological Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Lihong Liu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences , Southern Medical University , Guangzhou 510515 , China
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21
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Chen T, Sheng A, Hu Y, Mao D, Ning L, Zhang J. Modularization of three-dimensional gold nanoparticles/ferrocene/liposome cluster for electrochemical biosensor. Biosens Bioelectron 2019; 124-125:115-121. [DOI: 10.1016/j.bios.2018.09.101] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 09/18/2018] [Accepted: 09/30/2018] [Indexed: 12/30/2022]
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22
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Khownium K, Romsaiyud J, Borwornpinyo S, Wongkrasant P, Pongkorpsakol P, Muanprasat C, Boekfa B, Vilaivan T, Ruchirawat S, Limtrakul J. Turn-on fluorescent sensor for the detection of lipopolysaccharides based on a novel bispyrenyl terephtalaldehyde-bis-guanylhydrazone. NEW J CHEM 2019. [DOI: 10.1039/c9nj00323a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A “turn-on” bispyrenyl sensor for lipopolysaccharide detection with unique molecular conformations exhibits excimer emission with sensitivity down to nanomolar.
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Affiliation(s)
- Kriangsak Khownium
- Faculty of Medicine
- King Mongkut's Institute of Technology Ladkrabang
- Bangkok
- Thailand
| | - Jariya Romsaiyud
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Ramkhamhaeng University
- Bangkok 10240
- Thailand
| | - Suparerk Borwornpinyo
- Department of Biotechnology
- Faculty of Science
- Mahidol University
- Bangkok 10400
- Thailand
| | | | - Pawin Pongkorpsakol
- Department of Physiology
- Faculty of Science
- Mahidol University
- Bangkok 10400
- Thailand
| | - Chatchai Muanprasat
- Excellent Center for Drug Discovery
- Faculty of Science
- Mahidol University
- Bangkok 10400
- Thailand
| | - Bundet Boekfa
- Chemistry Department
- Faculty of Liberal Arts and Science
- Kasetsart University Kamphaeng Saen Campus
- Nakhon Pathom 73140
- Thailand
| | - Tirayut Vilaivan
- Department of Chemistry
- Faculty of Science
- Chulalongkorn University
- Bangkok 10330
- Thailand
| | | | - Jumras Limtrakul
- Department of Materials Science and Engineering
- School of Molecular Science and Engineering
- Vidyasirimedhi Institute of Science and Technology
- Rayong 21210
- Thailand
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23
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Yuan Y, Li L, Zhao M, Zhou J, Chen Z, Bai L. An aptamer based voltammetric biosensor for endotoxins using a functionalized graphene and molybdenum disulfide composite as a new nanocarrier. Analyst 2018; 144:1253-1259. [PMID: 30542691 DOI: 10.1039/c8an02139b] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Lipopolysaccharides (LPS), known as endotoxins, can cause a strong inflammatory response and lead to multiple organ failure in severe cases. This work reports a simple label-free voltammetric aptasensor for highly sensitive determination of LPS using a polyethyleneimine (PEI) functionalized reduced graphene oxide (rGO) and molybdenum disulfide (MoS2) composite (PEI-rGO-MoS2) as a new nanocarrier for electroactive toluidine blue (TB). The PEI-rGO-MoS2 nanocomposite with high electrical conductivity and large specific surface area can greatly increase the loading of TB and facilitate electron transfer from TB to an electrode. Then gold nanoparticles (AuNPs) were utilized to immobilize a thiolated LPS binding aptamer (LBA), which not only exhibited excellent biocompatibility, but also significantly amplified the electrochemical signal of TB. The proposed aptasensor exhibited high sensitivity for LPS and showed a wide linear range from 5.0 × 10-5 ng mL-1 to 2.0 × 102 ng mL-1 with a low limit of detection (LOD) of 3.01 × 10-5 ng mL-1, which overcame the shortcomings of traditional detection methods and achieved fast and accurate detection of LPS. Moreover, it exhibited excellent recovery and specificity upon spiking LPS in serum samples, indicating that this method has promising application in the field of trace analysis of LPS in clinical detection.
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Affiliation(s)
- Yonghua Yuan
- Engineering Technology Research Center for Pharmacodynamic Evaluation of Chongqing, College of Pharmacy, Chongqing Medical University, Chongqing 400016, PR China.
| | - Linlin Li
- Engineering Technology Research Center for Pharmacodynamic Evaluation of Chongqing, College of Pharmacy, Chongqing Medical University, Chongqing 400016, PR China.
| | - Min Zhao
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, PR China
| | - Jing Zhou
- Engineering Technology Research Center for Pharmacodynamic Evaluation of Chongqing, College of Pharmacy, Chongqing Medical University, Chongqing 400016, PR China.
| | - Zhihui Chen
- Engineering Technology Research Center for Pharmacodynamic Evaluation of Chongqing, College of Pharmacy, Chongqing Medical University, Chongqing 400016, PR China.
| | - Lijuan Bai
- Engineering Technology Research Center for Pharmacodynamic Evaluation of Chongqing, College of Pharmacy, Chongqing Medical University, Chongqing 400016, PR China.
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24
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Pacheco M, Jurado-Sánchez B, Escarpa A. Sensitive Monitoring of Enterobacterial Contamination of Food Using Self-Propelled Janus Microsensors. Anal Chem 2018; 90:2912-2917. [PMID: 29376315 DOI: 10.1021/acs.analchem.7b05209] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Food poisoning caused by bacteria is a major cause of disease and death worldwide. Herein we describe the use of Janus micromotors as mobile sensors for the detection of toxins released by enterobacteria as indicators of food contamination. The micromotors are prepared by a Pickering emulsion approach and rely on the simultaneous encapsulation of platinum nanoparticles for enhanced bubble-propulsion and receptor-functionalized quantum dots (QDs) for selective binding with the 3-deoxy-d-manno-oct-2-ulosonic acid target in the endotoxin molecule. Lipopolysaccharides (LPS) from Salmonella enterica were used as target endotoxins, which upon interaction with the QDs induce a rapid quenching of the native fluorescence of the micromotors in a concentration-dependent manner. The micromotor assay can readily detect concentrations as low as 0.07 ng mL-1 of endotoxin, which is far below the level considered toxic to humans (275 μg mL-1). Micromotors have been successfully applied for the detection of Salmonella toxin in food samples in 15 min compared with several hours required by the existing Gold Standard method. Such ultrafast and reliable approach holds considerable promise for food contamination screening while awaiting the results of bacterial cultures in a myriad of food safety and security defense applications.
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Affiliation(s)
- M Pacheco
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcala , Alcala de Henares E-28871, Madrid, Spain
| | - B Jurado-Sánchez
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcala , Alcala de Henares E-28871, Madrid, Spain.,Chemical Research Institute "Andrés M. del Río", University of Alcala , Alcala de Henares E-28871, Madrid, Spain
| | - A Escarpa
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcala , Alcala de Henares E-28871, Madrid, Spain.,Chemical Research Institute "Andrés M. del Río", University of Alcala , Alcala de Henares E-28871, Madrid, Spain
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25
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Colorimetric analysis of lipopolysaccharides based on its self-assembly to inhibit ion transport. Anal Chim Acta 2017; 992:85-93. [DOI: 10.1016/j.aca.2017.09.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 09/02/2017] [Accepted: 09/03/2017] [Indexed: 11/22/2022]
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26
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Zhang J, Khan I, Zhang Q, Liu X, Dostalek J, Liedberg B, Wang Y. Lipopolysaccharides detection on a grating-coupled surface plasmon resonance smartphone biosensor. Biosens Bioelectron 2017; 99:312-317. [PMID: 28787676 DOI: 10.1016/j.bios.2017.07.048] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 07/15/2017] [Accepted: 07/18/2017] [Indexed: 11/16/2022]
Abstract
We report a smartphone label-free biosensor platform based on grating-coupled surface plasmon resonance (GC-SPR). The sensor system relies on the smartphone's built-in flash light source and camera, a disposable sensor chip with Au diffraction grating and a compact disk (CD) as the spectra dispersive unit. The Au grating sensor chip was modified with a synthetic peptide receptor and employed on the GC-SPR detection of lipopolysaccharides (known as endotoxins) with detection limit of 32.5ng/mL in water. Upon incubation of various small and macro-molecules with the synthetic peptide modified sensor chips, we concluded the good selectivity of the sensor for LPS detection. In addition, the sensor shows feasibility for the detection of LPS in commonly used clinical injectable fluids, such as clinical-grade 0.9% sodium chloride intravenous infusion, compound sodium lactate intravenous infusion and insulin aspart. The developed sensor platform offers the advantage of portability and simplicity, which is attractive for point-of-care and remote detection of biomedical and environmental targets.
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Affiliation(s)
- Jinling Zhang
- School of Materials Science and Engineering, Centre for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang Avenue, 637553, Singapore; School of Ophthalmology&Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325001, PR China
| | - Imran Khan
- AIT-Austrian Institute of Technology GmbH, Biosensor Technologies, Muthgasse 11/2, 1190 Vienna, Austria
| | - Qingwen Zhang
- School of Ophthalmology&Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325001, PR China; Wenzhou Institute of Biomaterials and Engineering, Chinese Academy of Sciences, Wenzhou 325001, PR China
| | - Xiaohu Liu
- School of Materials Science and Engineering, Centre for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang Avenue, 637553, Singapore
| | - Jakub Dostalek
- AIT-Austrian Institute of Technology GmbH, Biosensor Technologies, Muthgasse 11/2, 1190 Vienna, Austria
| | - Bo Liedberg
- School of Materials Science and Engineering, Centre for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang Avenue, 637553, Singapore.
| | - Yi Wang
- School of Ophthalmology&Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325001, PR China; Wenzhou Institute of Biomaterials and Engineering, Chinese Academy of Sciences, Wenzhou 325001, PR China.
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27
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Liu T, Meng F, Cheng W, Sun H, Luo Y, Tang Y, Miao P. Preparation of a Peptide-Modified Electrode for Capture and Voltammetric Determination of Endotoxin. ACS OMEGA 2017; 2:2469-2473. [PMID: 30023666 PMCID: PMC6044874 DOI: 10.1021/acsomega.7b00495] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 05/22/2017] [Indexed: 05/10/2023]
Abstract
Endotoxin is the major structural constituent of the outer membrane of Gram-negative bacteria, which is a great threat to human health. Herein, a sensitive electrochemical biosensor for the detection of endotoxin is established by recording the voltammetric responses of the peptide-modified electrode. The utilized peptide has a high affinity for the target endotoxin, which ensures the high selectivity of this method. After the capture of endotoxin on the electrode surface, a negatively charged layer is formed, and the electron-transfer process is significantly hindered because of the increased steric hindrance and the electrostatic repulsion. The declined electrochemical signal could be used to indicate the concentration of endotoxin. This method is simple but effective, which requires limited reagents. Another highlight of this method is its user-friendly operation. Moreover, its applicability in human blood plasma promises its great potential utility in the near future.
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Affiliation(s)
- Tao Liu
- CAS
Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical
Engineering and Technology, Chinese Academy
of Sciences, Suzhou 215163, P.
R. China
- University
of Chinese Academy of Sciences, Beijing 100049, P. R.
China
| | - Fanyu Meng
- CAS
Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical
Engineering and Technology, Chinese Academy
of Sciences, Suzhou 215163, P.
R. China
| | - Wenbo Cheng
- CAS
Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical
Engineering and Technology, Chinese Academy
of Sciences, Suzhou 215163, P.
R. China
- University
of Chinese Academy of Sciences, Beijing 100049, P. R.
China
| | - Haixuan Sun
- CAS
Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical
Engineering and Technology, Chinese Academy
of Sciences, Suzhou 215163, P.
R. China
| | - Yan Luo
- Department
of Chemical Engineering, West Virginia University, 313 Engineering Research Building,
Evansdale Drive, Morgantown, West Virginia 26506, United States
- E-mail: . (Y.L.)
| | - Yuguo Tang
- CAS
Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical
Engineering and Technology, Chinese Academy
of Sciences, Suzhou 215163, P.
R. China
- E-mail: (Y.T.)
| | - Peng Miao
- CAS
Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical
Engineering and Technology, Chinese Academy
of Sciences, Suzhou 215163, P.
R. China
- E-mail: Phone: +86-512-69588279 (P.M.)
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28
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Obeng EM, Dullah EC, Razak NSA, Danquah MK, Budiman C, Ongkudon CM. Elucidating endotoxin-biomolecule interactions with FRET: extending the frontiers of their supramolecular complexation. J Biol Methods 2017; 4:e71. [PMID: 31453229 PMCID: PMC6706125 DOI: 10.14440/jbm.2017.172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 01/24/2017] [Accepted: 02/28/2017] [Indexed: 01/22/2023] Open
Abstract
Endotoxin has been one of the topical chemical contaminants of major concern to researchers, especially in the field of bioprocessing. This major concern of researchers stems from the fact that the presence of Gram-negative bacterial endotoxin in intracellular products is unavoidable and requires complex downstream purification steps. For instance, endotoxin interacts with recombinant proteins, peptides, antibodies and aptamers and these interactions have formed the foundation for most biosensors for endotoxin detection. It has become imperative for researchers to engineer reliable means/techniques to detect, separate and remove endotoxin, without compromising the quality and quantity of the end-product. However, the underlying mechanism involved during endotoxin-biomolecule interaction is still a gray area. The use of quantitative molecular microscopy that provides high resolution of biomolecules is highly promising, hence, may lead to the development of improved endotoxin detection strategies in biomolecule preparation. Förster resonance energy transfer (FRET) spectroscopy is one of the emerging most powerful tools compatible with most super-resolution techniques for the analysis of molecular interactions. However, the scope of FRET has not been well-exploited in the analysis of endotoxin-biomolecule interaction. This article reviews endotoxin, its pathophysiological consequences and the interaction with biomolecules. Herein, we outline the common potential ways of using FRET to extend the current understanding of endotoxin-biomolecule interaction with the inference that a detailed understanding of the interaction is a prerequisite for the design of strategies for endotoxin identification and removal from protein milieus.
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Affiliation(s)
- Eugene M Obeng
- Biotechnology Research Institute, University Malaysia Sabah, Kota Kinabalu, Sabah 88400, Malaysia
| | - Elvina C Dullah
- Biotechnology Research Institute, University Malaysia Sabah, Kota Kinabalu, Sabah 88400, Malaysia
| | | | - Michael K Danquah
- Department of Chemical Engineering, Curtin University Sarawak, Miri, Sarawak 98009, Malaysia
| | - Cahyo Budiman
- Biotechnology Research Institute, University Malaysia Sabah, Kota Kinabalu, Sabah 88400, Malaysia
| | - Clarence M Ongkudon
- Biotechnology Research Institute, University Malaysia Sabah, Kota Kinabalu, Sabah 88400, Malaysia
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29
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Ibáñez-Fonseca A, Alonso M, Arias FJ, Rodríguez-Cabello JC. Förster Resonance Energy Transfer-Paired Hydrogel Forming Silk-Elastin-Like Recombinamers by Recombinant Conjugation of Fluorescent Proteins. Bioconjug Chem 2017; 28:828-835. [DOI: 10.1021/acs.bioconjchem.6b00738] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arturo Ibáñez-Fonseca
- BIOFORGE Lab, University of Valladolid − CIBER-BBN, Paseo de Belén 19, 47011 Valladolid, Spain
| | - Matilde Alonso
- BIOFORGE Lab, University of Valladolid − CIBER-BBN, Paseo de Belén 19, 47011 Valladolid, Spain
| | - Francisco Javier Arias
- BIOFORGE Lab, University of Valladolid − CIBER-BBN, Paseo de Belén 19, 47011 Valladolid, Spain
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30
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Gao J, Li Z, Zhang O, Wu C, Zhao Y. Tunable accessibility of dye-doped liposomes towards gold nanoparticles for fluorescence sensing of lipopolysaccharide. Analyst 2017; 142:1084-1090. [DOI: 10.1039/c7an00019g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We developed a new fluorescence sensing strategy for LPS on the basis of its primitive role on the surface of bacteria.
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Affiliation(s)
- Jinhong Gao
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Zhuoru Li
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Ouyang Zhang
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Chuanliu Wu
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Yibing Zhao
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
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31
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Zhu Y, Xu C, Wang Y, Chen Y, Ding X, Yu B. Luminescent detection of the lipopolysaccharide endotoxin and rapid discrimination of bacterial pathogens using cationic platinum(ii) complexes. RSC Adv 2017. [DOI: 10.1039/c7ra03312e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
A luminescence probe based on chloroplatinum(ii) complexes ([Pt(N^N^N)Cl]+) was reported for sensing of the lipopolysaccharide (LPS) endotoxin and rapid discrimination of Gram-negative and Gram-positive bacterial pathogens.
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Affiliation(s)
- Yiwen Zhu
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- Key Laboratory of Carbon Fiber and Functional Polymers
| | - Chen Xu
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- Key Laboratory of Carbon Fiber and Functional Polymers
| | - Yu Wang
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- Key Laboratory of Carbon Fiber and Functional Polymers
| | - Yaqing Chen
- Affiliated Hospital of Hebei University
- Baoding 071000
- China
| | - Xiaokang Ding
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- Key Laboratory of Carbon Fiber and Functional Polymers
| | - Bingran Yu
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- Key Laboratory of Carbon Fiber and Functional Polymers
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32
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Jiang H, Jiang D, Shao J, Sun X, Wang J. High-throughput living cell-based optical biosensor for detection of bacterial lipopolysaccharide (LPS) using a red fluorescent protein reporter system. Sci Rep 2016; 6:36987. [PMID: 27841364 PMCID: PMC5107890 DOI: 10.1038/srep36987] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 10/24/2016] [Indexed: 01/05/2023] Open
Abstract
Due to the high toxicity of bacterial lipopolysaccharide (LPS), resulting in sepsis and septic shock, two major causes of death worldwide, significant effort is directed toward the development of specific trace-level LPS detection systems. Here, we report sensitive, user-friendly, high-throughput LPS detection in a 96-well microplate using a transcriptional biosensor system, based on 293/hTLR4A-MD2-CD14 cells that are transformed by a red fluorescent protein (mCherry) gene under the transcriptional control of an NF-κB response element. The recognition of LPS activates the biosensor cell, TLR4, and the co-receptor-induced NF-κB signaling pathway, which results in the expression of mCherry fluorescent protein. The novel cell-based biosensor detects LPS with specificity at low concentration. The cell-based biosensor was evaluated by testing LPS isolated from 14 bacteria. Of the tested bacteria, 13 isolated Enterobacteraceous LPSs with hexa-acylated structures were found to increase red fluorescence and one penta-acylated LPS from Pseudomonadaceae appeared less potent. The proposed biosensor has potential for use in the LPS detection in foodstuff and biological products, as well as bacteria identification, assisting the control of foodborne diseases.
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Affiliation(s)
- Hui Jiang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, PR China
| | - Donglei Jiang
- School of Food Science and Technology, Jiangsu Key Labortary of Zoonoses, Yangzhou University, Yangzhou, Jiangsu 225127, PR China
| | - Jingdong Shao
- Zhangjiagang Entry-Exit Inspection And Quarantine Bureau, Zhangjiagang, Jiangsu 215600, PR China
| | - Xiulan Sun
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, PR China
| | - Jiasheng Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, PR China
- Univ Georgia, Dept Environm Hlth Sci, Athens, GA 30602, USA
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33
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Jiang G, Wang J, Yang Y, Zhang G, Liu Y, Lin H, Zhang G, Li Y, Fan X. Fluorescent turn-on sensing of bacterial lipopolysaccharide in artificial urine sample with sensitivity down to nanomolar by tetraphenylethylene based aggregation induced emission molecule. Biosens Bioelectron 2016; 85:62-67. [DOI: 10.1016/j.bios.2016.04.071] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/16/2016] [Accepted: 04/21/2016] [Indexed: 10/21/2022]
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34
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Bag SS, Jana S, Pradhan MK. Synthesis, photophysical properties of triazolyl-donor/acceptor chromophores decorated unnatural amino acids: Incorporation of a pair into Leu-enkephalin peptide and application of triazolylperylene amino acid in sensing BSA. Bioorg Med Chem 2016; 24:3579-95. [DOI: 10.1016/j.bmc.2016.05.069] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 05/29/2016] [Accepted: 05/30/2016] [Indexed: 02/03/2023]
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35
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Xie S, Dong Y, Yuan Y, Chai Y, Yuan R. Ultrasensitive Lipopolysaccharides Detection Based on Doxorubicin Conjugated N-(Aminobutyl)-N-(ethylisoluminol) as Electrochemiluminescence Indicator and Self-Assembled Tetrahedron DNA Dendrimers as Nanocarriers. Anal Chem 2016; 88:5218-24. [DOI: 10.1021/acs.analchem.6b00276] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Shunbi Xie
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, People’s Republic of China
- Chongqing
Key Laboratory of Environmental Materials and Remediation Technologies, Chongqing University of Arts and Sciences, Chongqing 400715, People’s Republic of China
| | - Yongwang Dong
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, People’s Republic of China
| | - Yali Yuan
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, People’s Republic of China
| | - Yaqin Chai
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, People’s Republic of China
| | - Ruo Yuan
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, People’s Republic of China
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36
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Sun H, Miao P, Tang Y, Wang B, Qian J, Wang D. An elastography analytical method for the rapid detection of endotoxin. Analyst 2016; 140:4374-8. [PMID: 25985752 DOI: 10.1039/c5an00734h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a flexible analytical method for the study of coagulation systems by monitoring elastography (EG). The rapid detection of endotoxin is achieved by the EG analysis of endotoxin-induced limulus amebocyte lysate coagulation. This method is superior to other methods using the same reagents in not only sensitivity but also detecting time.
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Affiliation(s)
- Haixuan Sun
- CAS Key Lab of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, China.
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37
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Shen WJ, Zhuo Y, Chai YQ, Yuan R. Cu-Based Metal-Organic Frameworks as a Catalyst To Construct a Ratiometric Electrochemical Aptasensor for Sensitive Lipopolysaccharide Detection. Anal Chem 2015; 87:11345-52. [PMID: 26465256 DOI: 10.1021/acs.analchem.5b02694] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In this work, we developed a sensitive and efficient ratiometric electrochemical method for lipopolysaccharide (LPS) detection using Cu-based metal-organic frameworks (Cu-MOFs) as a catalyst and target-triggered quadratic cycles for signal amplification. First, in the presence of target LPS, the conformation change of the specifically designed hairpin probes 1 (HP1) triggered the target cyclic-induced polymerization to produce the output DNA with the aid of phi29 DNA polymerase (phi29). Then, the obtained output DNA hybridized with ferrocene-labeled hairpin probes 2 (Fc-HP2, which were immobilized on the electrode) to generate a nicking endonuclease (N.BstNBI) cleavage site. Thus, with N.BstNBI, the original signal molecules of Fc left from the electrode, and the single-stranded capture-probe-modified sensing interface was obtained. At this time, signal probes conducted by Au-nanoparticles-functionalized Cu-MOFs and labeled hairpin probes 3 (HP3/AuNPs/Cu-MOFs) were hybridized with capture probes for hairpin assembly. Herein, AuNPs/Cu-MOFs were not only used as nanocarriers for immobilizing HP3 but also acted as electroactive materials for signal reporting. With the proposed target-triggered quadratic cycles, the cleavage sites of Fc-HP2 were cut, and capture probes were obtained to hybridize with HP3/AuNPs/Cu-MOFs, which caused the signal decrease of Fc. Then Cu-MOFs were closed to the electrode for the signal increase of Cu-MOFs. Furthermore, when glucose was present in the detection solution, AuNPs/Cu-MOFs catalyzed the oxidation of glucose to realize the enzyme-free signal amplification. By measuring the peak currents ratio of the Cu-MOFs and Fc, the proposed aptasenor for LPS detection showed a low detection limit (0.33 fg/mL) and a wide linear range from 1.0 fg/mL to 100 ng/mL with high accuracy and sensitivity. This ratiometric electrochemical approach is expected to be a valuable strategy for detection of other analytes.
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Affiliation(s)
- Wen-Jun Shen
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, China
| | - Ying Zhuo
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, China
| | - Ya-Qin Chai
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, China
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, China
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38
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Lim SK, Chen P, Lee FL, Moochhala S, Liedberg B. Peptide-Assembled Graphene Oxide as a Fluorescent Turn-On Sensor for Lipopolysaccharide (Endotoxin) Detection. Anal Chem 2015; 87:9408-12. [DOI: 10.1021/acs.analchem.5b02270] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Seng Koon Lim
- Centre
for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, 637553, Singapore
| | - Peng Chen
- Centre
for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, 637553, Singapore
| | - Fook Loy Lee
- Centre
for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, 637553, Singapore
| | - Shabbir Moochhala
- Centre
for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, 637553, Singapore
- DSO National Laboratories, 27 Medical Drive #09-01, 117510, Singapore
| | - Bo Liedberg
- Centre
for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, 637553, Singapore
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39
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40
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Thirupathi P, Park JY, Neupane LN, Kishore MYLN, Lee KH. Pyrene Excimer-Based Peptidyl Chemosensors for the Sensitive Detection of Low Levels of Heparin in 100% Aqueous Solutions and Serum Samples. ACS APPLIED MATERIALS & INTERFACES 2015; 7:14243-14253. [PMID: 26068096 DOI: 10.1021/acsami.5b01932] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Fluorescent chemosensors (1 and 2, Py-(Arg)nGlyGlyGly(Arg)nLys(Py)-NH2, n = 2 and 3) bearing two pyrene (Py) labeled heparin-binding peptides were synthesized for the sensitive ratiometric detection of heparin. The peptidyl chemosensors (1 and 2) sensitively detected nanomolar concentrations of heparin in aqueous solutions and in serum samples via a ratiometric response. In 100% aqueous solutions at pH 7.4, both chemosensors exhibited significant excimer emission at 486 nm as well as weak monomer emission in the absence of heparin. Upon the addition of heparin into the solution, excimer emission increased with a blue shift (10 nm) and monomer emission at 376 nm decreased. The chemosensors showed a similar sensitive ratiometric response to heparin independent of the concentration of the chemosensors. The peptidyl chemosensors were applied to the ratiometric detection of heparin over a wide range of pH (1.5-11.5) using the excimer/momomer emission changes. In the presence of serum, 1 and 2 displayed significant monomer emission at 376 nm with relatively weak excimer emission and the addition of heparin induced a significant increase in excimer emission at 480 nm and a concomitant decrease in monomer emission. The enhanced ratiometric response to heparin in the serum sample was due to the interactions between the peptidyl chemosensors and serum albumin in the serum sample. The detection limits of 2 for heparin were less than 1 nM in 100% aqueous solutions and serum samples. The peptidyl chemosensors bearing two heparin-binding sites are a suitable tool for the sensitive ratiometric detection of nanomolar concentrations of heparin in 100% aqueous solutions and serum samples.
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Affiliation(s)
- Ponnaboina Thirupathi
- Center for Design and Applications of Molecular Catalysts, Department of Chemistry and Chemical Engineering, Inha University, 100 Inha-Ro, Yonghyun-Dong, Nam-Gu, Incheon 402-751, Korea
| | - Joo-Young Park
- Center for Design and Applications of Molecular Catalysts, Department of Chemistry and Chemical Engineering, Inha University, 100 Inha-Ro, Yonghyun-Dong, Nam-Gu, Incheon 402-751, Korea
| | - Lok Nath Neupane
- Center for Design and Applications of Molecular Catalysts, Department of Chemistry and Chemical Engineering, Inha University, 100 Inha-Ro, Yonghyun-Dong, Nam-Gu, Incheon 402-751, Korea
| | - Mallela Y L N Kishore
- Center for Design and Applications of Molecular Catalysts, Department of Chemistry and Chemical Engineering, Inha University, 100 Inha-Ro, Yonghyun-Dong, Nam-Gu, Incheon 402-751, Korea
| | - Keun-Hyeung Lee
- Center for Design and Applications of Molecular Catalysts, Department of Chemistry and Chemical Engineering, Inha University, 100 Inha-Ro, Yonghyun-Dong, Nam-Gu, Incheon 402-751, Korea
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41
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Thirupathi P, Neupane LN, Lee KH. Fluorescent peptide-based sensors for the ratiometric detection of nanomolar concentration of heparin in aqueous solutions and in serum. Anal Chim Acta 2015; 873:88-98. [DOI: 10.1016/j.aca.2015.03.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Revised: 02/26/2015] [Accepted: 03/02/2015] [Indexed: 12/19/2022]
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42
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Detecting endotoxin with a flow cytometry-based magnetic aptasensor. Anal Biochem 2014; 466:38-43. [PMID: 25172133 DOI: 10.1016/j.ab.2014.08.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 08/14/2014] [Accepted: 08/19/2014] [Indexed: 12/18/2022]
Abstract
Endotoxin, which is also known as lipopolysaccharide (LPS), is a marker for intruding gram-negative pathogens. It is essential to detect endotoxin quickly and sensitively in a complex milieu. A new flow cytometry (FCM)-based magnetic aptasensor assay that employs two endotoxin-binding aptamers and magnetic beads has been developed to detect endotoxin. The endotoxin-conjugated sandwich complex on magnetic beads was observed by scanning confocal laser microscopy. The resulting magnetic aptasensor rapidly detected (<1 min) endotoxin within a broad dynamic detection range of 10(-8) to 10(0)mg/ml in the presence of bovine serum albumin (BSA), RNA, sucrose, and glucose, which are most likely to coexist with endotoxin in the majority of biological liquids. Only 2 μl of magnetic aptasensor was required to quantify the endotoxin solution. Furthermore, the magnetic aptasensor could be regenerated seven times and still presented an outstanding response to the endotoxin solution. Therefore, the magnetic aptasensor exhibited high sensitivity, selectivity, and reproducibility, thereby serving as a powerful tool for the quality control and high-throughput detection of endotoxin in the food and pharmaceutical industries.
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43
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Kim DH, Park YJ, Jung KH, Lee KH. Ratiometric Detection of Nanomolar Concentrations of Heparin in Serum and Plasma Samples Using a Fluorescent Chemosensor Based on Peptides. Anal Chem 2014; 86:6580-6. [DOI: 10.1021/ac501089m] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Da-Hye Kim
- Bioorganic Chemistry Laboratory,
Center for Design and Applications of Molecular Catalysts, Department
of Chemistry and Chemical Engineering, Inha University, 253 Yonghyeon-dong, Nam-gu, Incheon 402-751, Republic of Korea
| | - Yu Jin Park
- Bioorganic Chemistry Laboratory,
Center for Design and Applications of Molecular Catalysts, Department
of Chemistry and Chemical Engineering, Inha University, 253 Yonghyeon-dong, Nam-gu, Incheon 402-751, Republic of Korea
| | - Kwan Ho Jung
- Bioorganic Chemistry Laboratory,
Center for Design and Applications of Molecular Catalysts, Department
of Chemistry and Chemical Engineering, Inha University, 253 Yonghyeon-dong, Nam-gu, Incheon 402-751, Republic of Korea
| | - Keun-Hyeung Lee
- Bioorganic Chemistry Laboratory,
Center for Design and Applications of Molecular Catalysts, Department
of Chemistry and Chemical Engineering, Inha University, 253 Yonghyeon-dong, Nam-gu, Incheon 402-751, Republic of Korea
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44
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Wang Y, Zhang D, Liu W, Zhang X, Yu S, Liu T, Zhang W, Zhu W, Wang J. Facile colorimetric method for simple and rapid detection of endotoxin based on counterion-mediated gold nanorods aggregation. Biosens Bioelectron 2014; 55:242-8. [DOI: 10.1016/j.bios.2013.12.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 11/18/2013] [Accepted: 12/02/2013] [Indexed: 11/30/2022]
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45
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Bai L, Chai Y, Pu X, Yuan R. A signal-on electrochemical aptasensor for ultrasensitive detection of endotoxin using three-way DNA junction-aided enzymatic recycling and graphene nanohybrid for amplification. NANOSCALE 2014; 6:2902-8. [PMID: 24477782 DOI: 10.1039/c3nr05930h] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Endotoxin, also known as lipopolysaccharide (LPS), is able to induce a strong immune response on its internalization into mammalian cells. To date, aptamer-based biosensors for LPS detection have been rarely reported. This work describes a new signal-on electrochemical aptasensor for the ultrasensitive detection of LPS by combining the three-way DNA hybridization process and nanotechnology-based amplification. With the help of DNA1 (associated with the concentration of target LPS), the capture probe hybridizes with DNA1 and the assistant probe to open its hairpin structure and form a ternary "Y" junction structure. The DNA1 can be released from the structure in the presence of nicking endonuclease to initiate the next hybridization process. Then a great deal of cleaved capture probe produced in the cyclic process can bind with DNA2-nanocomposite, which contains the electroactive toluidine blue (Tb) with the amplification materials graphene (Gra) and gold nanoparticles (AuNPs). Thus, an enhanced electrochemical signal can be easily read out. With the cascade signal amplification, this newly designed protocol provides an ultrasensitive electrochemical detection of LPS down to the femtogram level (8.7 fg mL(-1)) with a linear range of 6 orders of magnitude (from 10 fg mL(-1) to 50 ng mL(-1)). Moreover, the high sensitivity and specificity make this method versatile for the detection of other biomolecules by changing the corresponding sequences of the capture probe and the assistant probe.
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Affiliation(s)
- Lijuan Bai
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
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46
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Wang H, Liu J, Han A, Xiao N, Xue Z, Wang G, Long J, Kong D, Liu B, Yang Z, Ding D. Self-assembly-induced far-red/near-infrared fluorescence light-up for detecting and visualizing specific protein-Peptide interactions. ACS NANO 2014; 8:1475-1484. [PMID: 24417359 DOI: 10.1021/nn4054914] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Understanding specific protein-peptide interactions could offer a deep insight into the development of therapeutics for many human diseases. In this work, we designed and synthesized a far-red/near-infrared (FR/NIR) fluorescence light-up probe (DBT-2EEGWRESAI) by simply integrating two tax-interacting protein-1 (TIP-1)-specific peptide ligands (EEGWRESAI) with one 4,7-di(thiophen-2-yl)-2,1,3-benzothiadiazole (DBT) unit. We first demonstrated that DBT is an environment-sensitive fluorophore with FR/NIR fluorescence due to its strong charge transfer character in the excited state. Thanks to the environmental sensitivity of DBT, the probe DBT-2EEGWRESAI is very weakly fluorescent in aqueous solution but lights up its fluorescence when the probe specifically binds to TIP-1 protein or polyprotein (ULD-TIP-1 tetramer). It is found that the DBT-2EEGWRESAI/TIP-1 protein and the DBT-2EEGWRESAI/ULD-TIP-1 tetramer could self-assemble into spherical nanocomplexes and a nanofiber network, respectively, which lead to probe fluorescence turn-on through providing DBT with a hydrophobic microenvironment. By virtue of the self-assembly-induced FR/NIR fluorescence turn-on, DBT-2EEGWRESAI can detect and visualize specific protein/polyprotein-peptide interactions in both solution and live bacteria in a high contrast and selective manner.
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Affiliation(s)
- Huaimin Wang
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, People's Republic of China
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47
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Liu F, Mu J, Wu X, Bhattacharjya S, Yeow EKL, Xing B. Peptide–perylene diimide functionalized magnetic nano-platforms for fluorescence turn-on detection and clearance of bacterial lipopolysaccharides. Chem Commun (Camb) 2014; 50:6200-3. [DOI: 10.1039/c4cc01266f] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A simple and novel dual-functional peptide magnetic nanoplatform has been successfully designed for sensitive detection and rapid clearance of bacterial endotoxins.
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Affiliation(s)
- Fang Liu
- Division of Chemistry and Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore, Singapore
| | - Jing Mu
- Division of Chemistry and Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore, Singapore
| | - Xiangyang Wu
- Division of Chemistry and Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore, Singapore
| | - Surajit Bhattacharjya
- Division of Structural Biology & Biochemistry
- School of Biological Sciences
- Nanyang Technological University
- Singapore, Singapore
| | - Edwin Kok Lee Yeow
- Division of Chemistry and Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore, Singapore
| | - Bengang Xing
- Division of Chemistry and Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore, Singapore
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48
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Techen A, Czapla S, Möllnitz K, Budach D, Wessig P, Kumke MU. Synthesis and Spectroscopic Characterization of Fluorophore-Labeled Oligospiroketal Rods. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201200616] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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49
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Gao J, Lai Y, Wu C, Zhao Y. Exploring and exploiting the synergy of non-covalent interactions on the surface of gold nanoparticles for fluorescent turn-on sensing of bacterial lipopolysaccharide. NANOSCALE 2013; 5:8242-8248. [PMID: 23884109 DOI: 10.1039/c3nr02490c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The sensing of lipopolysaccharide (LPS) relies on the synergy of multiple electrostatic and hydrophobic interactions between LPS and the sensor. However, how non-covalent interactions are coordinated to impel the recognition process still remains elusive, and the exploration of which would promote the development of LPS sensors with higher specificity and sensitivity. In this work, we hypothesize that Au NPs would provide a straightforward and flexible platform for studying the synergy of non-covalent interactions. The detailed mechanism of interactions between the designed fluorescent probes and Au NPs with two distinct surface properties was systematically explored. We demonstrated that only when the electrostatic attraction and hydrophobic stacking are both present, the binding of fluorescent probes onto Au NPs can be not only highly efficient, but also positively cooperative. After that, hybrid systems that consist of Au NPs and surface-assembled fluorescent probes were exploited for fluorescent turn-on sensing of LPS. The results show that the sensitivity and selectivity to LPS relies strongly on the binding affinity between fluorescent probes and Au NPs. Fluorescent probes assembled Au NPs thus provide an attractive platform for further optimization of the sensitivity/selectivity of LPS sensing.
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Affiliation(s)
- Jinhong Gao
- Department of Chemistry, College of Chemistry and Chemical Engineering and the MOE Key Laboratory of Analytical Sciences, Xiamen University, Xiamen, 361005, PR China
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50
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Das AP, Kumar PS, Swain S. Recent advances in biosensor based endotoxin detection. Biosens Bioelectron 2013; 51:62-75. [PMID: 23934306 DOI: 10.1016/j.bios.2013.07.020] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 06/28/2013] [Accepted: 07/11/2013] [Indexed: 12/20/2022]
Abstract
Endotoxins also referred to as pyrogens are chemically lipopolysaccharides habitually found in food, environment and clinical products of bacterial origin and are unavoidable ubiquitous microbiological contaminants. Pernicious issues of its contamination result in high mortality and severe morbidities. Standard traditional techniques are slow and cumbersome, highlighting the pressing need for evoking agile endotoxin detection system. The early and prompt detection of endotoxin assumes prime importance in health care, pharmacological and biomedical sectors. The unparalleled recognition abilities of LAL biosensors perched with remarkable sensitivity, high stability and reproducibility have bestowed it with persistent reliability and their possible fabrication for commercial applicability. This review paper entails an overview of various trends in current techniques available and other possible alternatives in biosensor based endotoxin detection together with its classification, epidemiological aspects, thrust areas demanding endotoxin control, commercially available detection sensors and a revolutionary unprecedented approach narrating the influence of omics for endotoxin detection.
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Affiliation(s)
- A P Das
- Bioengineering Laboratory, Centre of Biotechnology, Siksha O Anusandhan University, Bhubaneswar, India.
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