1
|
Wang S, Sun Z, Zhao X, Li K, Wang Y, Zhang X. N-C QDs coated with a molecularly imprinted polymer as a fluorescent probe for detection of penicillin. Dalton Trans 2024; 53:6965-6973. [PMID: 38546786 DOI: 10.1039/d3dt04297a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/24/2024]
Abstract
Many diseases are due to bacterial infections, which are treated by penicillin. Existing methods for penicillin detection have relatively high requirements for sample storage and processing, personnel professionalism, and instruments. Herein, water-soluble N-C quantum dots (QDs) from wheat straw were synthesized in a green way by using an efficient and simple method. The N-C QDs were modified with an imprinted layer by a gel-sol method. Penicillin selectively quenched the fluorescence emission of N-C QDs@MIP, and a linear relationship was obtained in the concentration range of 1.0 × 10-6-15.2 × 10-6 mol L-1. The reliability of the sensor in real sample analysis was satisfactory with results in the range of 93.6%-100%, and the sensor showed good reproducibility and long-term stability. The study provides a simple strategy to fabricate N-C QDs@MIP with a highly selective recognition ability and opens an avenue to develop highly efficient sensing probes for the detection of antibiotics in biological applications.
Collapse
Affiliation(s)
- Shan Wang
- School of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang, 712000, China.
| | - Zhihui Sun
- School of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang, 712000, China.
| | - Xuyang Zhao
- Xianyang Institute of Cultural Relics and Archaeology, Xianyang, 712000, China
| | - Kunhua Li
- Xianyang Institute of Cultural Relics and Archaeology, Xianyang, 712000, China
| | - Yafei Wang
- Xianyang Institute of Cultural Relics and Archaeology, Xianyang, 712000, China
| | - Xijing Zhang
- School of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang, 712000, China.
| |
Collapse
|
2
|
Pyo K, Matus MF, Hulkko E, Myllyperkiö P, Malola S, Kumpulainen T, Häkkinen H, Pettersson M. Atomistic View of the Energy Transfer in a Fluorophore-Functionalized Gold Nanocluster. J Am Chem Soc 2023. [PMID: 37377151 DOI: 10.1021/jacs.3c02292] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Understanding the dynamics of Förster resonance energy transfer (FRET) in fluorophore-functionalized nanomaterials is critical for developing and utilizing such materials in biomedical imaging and optical sensing applications. However, structural dynamics of noncovalently bound systems have a significant effect on the FRET properties affecting their applications in solutions. Here, we study the dynamics of the FRET in atomistic detail by disclosing the structural dynamics of the noncovalently bound azadioxotriangulenium dye (KU) and atomically precise gold nanocluster (Au25(p-MBA)18, p-MBA = para-mercaptobenzoic acid) with a combination of experimental and computational methods. Two distinct subpopulations involved in the energy transfer process between the KU dye and the Au25(p-MBA)18 nanoclusters were resolved by time-resolved fluorescence experiments. Molecular dynamics simulations revealed that KU is bound to the surface of Au25(p-MBA)18 by interacting with the p-MBA ligands as a monomer and as a π-π stacked dimer where the center-to-center distance of the monomers to Au25(p-MBA)18 is separated by ∼0.2 nm, thus explaining the experimental observations. The ratio of the observed energy transfer rates was in reasonably good agreement with the well-known 1/R6 distance dependence for FRET. This work discloses the structural dynamics of the noncovalently bound nanocluster-based system in water solution, providing new insight into the dynamics and energy transfer mechanism of the fluorophore-functionalized gold nanocluster at an atomistic level.
Collapse
Affiliation(s)
- Kyunglim Pyo
- Nanoscience Center, Department of Chemistry, P.O. Box 35, University of Jyväskylä, Jyväskylä FI-40014, Finland
| | - María Francisca Matus
- Nanoscience Center, Department of Physics, P.O. Box 35, University of Jyväskylä, Jyväskylä FI-40014, Finland
| | - Eero Hulkko
- Nanoscience Center, Department of Chemistry, P.O. Box 35, University of Jyväskylä, Jyväskylä FI-40014, Finland
- Nanoscience Center, Department of Biological and Environmental Sciences, P.O. Box 35, FI-40014, University of Jyväskylä, Jyväskylä FI-40014, Finland
| | - Pasi Myllyperkiö
- Nanoscience Center, Department of Chemistry, P.O. Box 35, University of Jyväskylä, Jyväskylä FI-40014, Finland
| | - Sami Malola
- Nanoscience Center, Department of Physics, P.O. Box 35, University of Jyväskylä, Jyväskylä FI-40014, Finland
| | - Tatu Kumpulainen
- Nanoscience Center, Department of Chemistry, P.O. Box 35, University of Jyväskylä, Jyväskylä FI-40014, Finland
| | - Hannu Häkkinen
- Nanoscience Center, Department of Chemistry, P.O. Box 35, University of Jyväskylä, Jyväskylä FI-40014, Finland
- Nanoscience Center, Department of Physics, P.O. Box 35, University of Jyväskylä, Jyväskylä FI-40014, Finland
| | - Mika Pettersson
- Nanoscience Center, Department of Chemistry, P.O. Box 35, University of Jyväskylä, Jyväskylä FI-40014, Finland
| |
Collapse
|
3
|
A novel electrochemical biosensor for detection of micrococcal nuclease in milk based on a U-shaped DNA structure. Talanta 2023. [DOI: 10.1016/j.talanta.2022.123989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
4
|
Chen M, Huang H, Pan Y, Li Z, Ouyang S, Ren C, Zhao Q. Preparation of layering-structured magnetic fluorescent liposomes and labeling of HepG2 cells. Biomed Mater Eng 2022; 33:147-158. [PMID: 35180107 DOI: 10.3233/bme-228000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND At present, surgical resection and chemotherapy are still the main treatments for hepatocellular carcinoma and other cancers, but the curative effect and survival rate are not ideal. OBJECTIVE In this study, we aim to prepare a carrier with low toxicity, high biocompatibility and targeted transport for the treatment of hepatocellular carcinoma. METHODS CdSe quantum dots (QDs) modified with oleic acid were synthesized. Then hydrophobic CdSe QDs and hydrophilic super-paramagnetic Fe3O4 particles were encapsulated into different layers of liposomes to form magnetic fluorescent liposomes (MFLs). MFLs in the aqueous would quickly drift towards the external magnet and the entire process was clearly observed with fluorescence microscope. The fluorescence spectra revealed that the fluorescence properties of MFLs were similar to that of CdSe QDs. RESULTS QDs had an average size of 3.32 nm with good fluorescence properties. The size of MFLs was about 100 nm (transmission electron microscopy (TEM) analysis showed the average size of MFLs was about 82.8 nm and dynamic light scattering (DLS) detection showed 111.9 nm). After being cultured with MFLs for 8 h, HepG2 cells were labeled by MFLs and good fluorescence images were obtained. MTT analysis also expressed their good biocompatibility. CONCLUSION The prepared MFLs had multi-function and could be used as ideal drug carriers.
Collapse
Affiliation(s)
- Mengxiao Chen
- School of Chemical Engineering, Sichuan University, Chengdu, People's Republic of China
| | - Huaying Huang
- School of Chemical Engineering, Sichuan University, Chengdu, People's Republic of China
| | - Yujin Pan
- School of Chemical Engineering, Sichuan University, Chengdu, People's Republic of China
| | - Zhenzhen Li
- School of Chemical Engineering, Sichuan University, Chengdu, People's Republic of China
| | - Si Ouyang
- School of Chemical Engineering, Sichuan University, Chengdu, People's Republic of China
| | - Changjing Ren
- School of Chemical Engineering, Sichuan University, Chengdu, People's Republic of China
| | - Qiang Zhao
- School of Chemical Engineering, Sichuan University, Chengdu, People's Republic of China
| |
Collapse
|
5
|
Singh S, Numan A, Cinti S. Point-of-Care for Evaluating Antimicrobial Resistance through the Adoption of Functional Materials. Anal Chem 2022; 94:26-40. [PMID: 34802244 PMCID: PMC8756393 DOI: 10.1021/acs.analchem.1c03856] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Sima Singh
- IES
Institute of Pharmacy, IES University Campus, Kalkheda, Ratibad Main Road, Bhopal 462044, Madhya Pradesh, India
| | - Arshid Numan
- Graphene
& Advanced 2D Materials Research Group (GAMRG), School of Engineering
and Technology, Sunway University, 5, Jalan University, Bandar Sunway, 47500 Petaling
Jaya, Selangor, Malaysia
| | - Stefano Cinti
- Department
of Pharmacy, University of Naples “Federico
II”, Via D. Montesano 49, 80131 Naples, Italy
- BAT
Center−Interuniversity Center for Studies on Bioinspired Agro-Environmental
Technology, University of Napoli Federico
II, 80055 Naples, Italy
| |
Collapse
|
6
|
Jin P, Ma D, Gao Y, Wang L, Gao Z, Zhang Y, Liu M, Xu J, Wang J. Determination of Cisplatin Cross-Linked Hyaluronic Acid (CPHA) Hydrogel and DNA Using the Fluorescent Response from Mercaptopropionic Acid (MPA) Capped Cadmium Telluride Quantum Dots (CdTe QDs). ANAL LETT 2021. [DOI: 10.1080/00032719.2020.1869979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Penghui Jin
- Applied Chemistry Key Laboratory, Yanshan University, Qinhuangdao, China
| | - Daoqing Ma
- Applied Chemistry Key Laboratory, Yanshan University, Qinhuangdao, China
| | - Yabiao Gao
- Applied Chemistry Key Laboratory, Yanshan University, Qinhuangdao, China
| | - Libin Wang
- Applied Chemistry Key Laboratory, Yanshan University, Qinhuangdao, China
| | - Zhihong Gao
- Applied Chemistry Key Laboratory, Yanshan University, Qinhuangdao, China
| | - Yating Zhang
- Applied Chemistry Key Laboratory, Yanshan University, Qinhuangdao, China
| | - Mingxin Liu
- College of Electric and Information Engineering, Guangdong Ocean University, Zhanjiang, China
| | - Jingying Xu
- Mental Health Service Center, Yanshan University, Qinhuangdao, China
| | - Jidong Wang
- Applied Chemistry Key Laboratory, Yanshan University, Qinhuangdao, China
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, China
| |
Collapse
|
7
|
Yang W, Fang Q, Zhang L, Yin H, Wu C, Zhang W, Huang W, Ni X. Synthesis and characterization of an innovative molecular imprinted polymers based on CdTe QDs fluorescence sensing for selective detection of sulfadimidine. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02714-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
|
8
|
Samani SS, Khojastehnezhad A, Ramezani M, Alibolandi M, Yazdi FT, Mortazavi SA, Khoshbin Z, Abnous K, Taghdisi SM. Ultrasensitive detection of micrococcal nuclease activity and Staphylococcus aureus contamination using optical biosensor technology-A review. Talanta 2021; 226:122168. [DOI: 10.1016/j.talanta.2021.122168] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 01/26/2021] [Accepted: 01/27/2021] [Indexed: 01/02/2023]
|
9
|
Zhang J, Yang W, Li S, Bian L. Fluorescent reversible regulation of cysteamine-capped ZnSe quantum dots successively induced by photoinduced electron transfer of herring sperm DNA and intercalation binding of ethidium bromide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 249:119116. [PMID: 33385973 DOI: 10.1016/j.saa.2020.119116] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 09/13/2020] [Accepted: 10/17/2020] [Indexed: 06/12/2023]
Abstract
A fluorescent reversible regulation was studied by fluorescence spectra, ultraviolet-visible spectra in the combination of molecular docking, which based on the photoinduced electron transfer(PET) from hsDNA (herring sperm DNA) to CA (cysteamine)-capped ZnSe QDs (quantum dots) and intercalation of ethidium bromide (EB) into hsDNA. It was proven that the QDs bound with the adding hsDNA by electrostatic force and formed 1:1 hsDNA-QDs complexes, leading to the PET from hsDNA to QDs, and consequently the fluorescence quenching of the QDs; with EB being added in the complex solution, it bound with hsDNA by intercalation interaction and caused hsDNA releasing from hsDNA-QDs complex with forming 2.5:1 EB-hsDNA complex, leading to the recovery of fluorescence, based on the greater binding constant (1.74 × 106 L·mol-1) of hsDNA with the embedded EB comparing to that of QDs with the captured hsDNA (4.25 × 104 L·mol-1). A good linear relationship existed between the fluorescence recovery yield and the EB concentrations under the range of 1.0-12.0 × 10-6 mol·L-1 with bare interference of related substances. This work provided some useful insights into the study of binding mechanism between DNAs with their intercalators and fluorescence bi-direction regulation, and showed great potential for the determination of trace EB.
Collapse
Affiliation(s)
- Jiaxin Zhang
- College of Life Science, Northwest University, Xi'an 710069, China
| | - Wenhui Yang
- College of Life Science, Northwest University, Xi'an 710069, China
| | - Shasha Li
- College of Life Science, Northwest University, Xi'an 710069, China
| | - Liujiao Bian
- College of Life Science, Northwest University, Xi'an 710069, China.
| |
Collapse
|
10
|
Hunsur Ravikumar C, Nair G. V, M. P. R, Surareungchai W, Thakur A, Balakrishna RG. Biomass derived carbon dot decorated ssDNA for a ‘turn-on’ fluorescent assay for detection of Staphylococcus aureus MNase. NEW J CHEM 2021. [DOI: 10.1039/d1nj00199j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel ‘turn on’ fluorescence aptasensor based on an energy transfer mechanism has been designed using ssDNA conjugated carbon dots (C-dots) and graphene oxide (GO).
Collapse
Affiliation(s)
| | - Vishnu Nair G.
- Centre for Nano and Material Sciences
- Jain University
- Jain Global Campus
- Kanakapura
- Bengaluru
| | | | - Werasak Surareungchai
- School of Bioresources and Technology
- King Mongkut's University of Technology Thonburi
- Bankhuntien-Chaitalay Road
- Thakam
- Thailand
| | | | - R. Geetha Balakrishna
- Centre for Nano and Material Sciences
- Jain University
- Jain Global Campus
- Kanakapura
- Bengaluru
| |
Collapse
|
11
|
Rm R, Maroli N, J A, Ponmalai K, K K. Highly adaptable and sensitive FRET-based aptamer assay for the detection of Salmonella paratyphi A. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 243:118662. [PMID: 32810775 DOI: 10.1016/j.saa.2020.118662] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 05/01/2020] [Accepted: 06/26/2020] [Indexed: 06/11/2023]
Abstract
Here we demonstrate a facile and versatile fluorescence resonance energy transfer (FRET) based aptasensor for rapid detection of Salmonella paratyphi A. The assay shows a detection limit up to 10 cfu·mL-1 with no cross-reactivity with other bacterial species. Less than 8% of inter-assay coefficient variance and recovery rate between 85 and 102% attests the assay reliability. The advantages of FRET-based aptamer assay over the conventional immunoassay formats such as ELISA are the specificity, speed, reliability, and simplicity of the assay. The ssDNA aptamers specific towards pathogenic Salmonella paratyphi A were generated via whole-cell SELEX. The aptamer was conjugated onto quantum dot (QD) that served as the molecular beacon and graphene oxide (GO) was used as a fluorescence quencher. Thus the proposed method enables detection of target pathogen using FRET-based assay. Further interaction of aptamer with pathogen protein DNA gyrase was explored using classical molecular dynamics simulation.
Collapse
Affiliation(s)
- Renuka Rm
- Molecular Immunology Laboratory, DRDO-BU-CLS, Bharathiar University Campus, Coimbatore 641046, Tamil Nadu, India
| | - Nikhil Maroli
- Computational Biology Division, DRDO-BU CLS, Bharathiar University Campus, Coimbatore 641046, Tamil Nadu, India
| | - Achuth J
- Molecular Immunology Laboratory, DRDO-BU-CLS, Bharathiar University Campus, Coimbatore 641046, Tamil Nadu, India
| | - Kolandaivel Ponmalai
- Computational Biology Division, DRDO-BU CLS, Bharathiar University Campus, Coimbatore 641046, Tamil Nadu, India
| | - Kadirvelu K
- Molecular Immunology Laboratory, DRDO-BU-CLS, Bharathiar University Campus, Coimbatore 641046, Tamil Nadu, India.
| |
Collapse
|
12
|
Zhou J, Fu R, Tian F, Yang Y, Jiao B, He Y. Dual Enzyme-Induced Au–Ag Alloy Nanorods as Colorful Chromogenic Substrates for Sensitive Detection of Staphylococcus aureus. ACS APPLIED BIO MATERIALS 2020; 3:6103-6109. [DOI: 10.1021/acsabm.0c00687] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jing Zhou
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, P. R. China
- National Citrus Engineering Research Center, Chongqing 400712, P. R. China
| | - Ruijie Fu
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, P. R. China
- National Citrus Engineering Research Center, Chongqing 400712, P. R. China
| | - Fengyu Tian
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, P. R. China
- National Citrus Engineering Research Center, Chongqing 400712, P. R. China
| | - Yujun Yang
- Key Laboratory of Laboratory Medical Diagnostics, Chinese Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, P. R. China
| | - Bining Jiao
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, P. R. China
- National Citrus Engineering Research Center, Chongqing 400712, P. R. China
| | - Yue He
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, P. R. China
- National Citrus Engineering Research Center, Chongqing 400712, P. R. China
| |
Collapse
|
13
|
Arslan T, Güney O. Ratiometric sensor based on imprinted quantum dots-cationic dye nanohybrids for selective sensing of dsDNA. Anal Biochem 2020; 591:113540. [DOI: 10.1016/j.ab.2019.113540] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 11/19/2019] [Accepted: 12/09/2019] [Indexed: 12/11/2022]
|
14
|
Yang Y, Mao G, Ji X, He Z. DNA-templated quantum dots and their applications in biosensors, bioimaging, and therapy. J Mater Chem B 2019; 8:9-17. [PMID: 31750850 DOI: 10.1039/c9tb01870k] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Over the past 10 years, DNA functionalized quantum dots (QDs) have attracted considerable attention in sensing and imaging of disease-relevant biological targets, as well as cancer therapy. Considerable efforts have been devoted to obtaining DNA functionalized QDs with enhanced stability and quantum yield. Here, we focus on a one-pot method, in which phosphorothioate-modified DNA is used as the co-ligand on the basis of the strong binding of sulfur and Cd2+. After a short summary of the preparation of DNA-templated QDs, versatile bioapplications based on the constructed ratiometric fluorescent probes, nanobeacons and multiple bottom-up assemblies will be discussed. A substantial part of the review will focus on these applications, ranging from small molecule, biological macromolecule, cancer cell and pathogen sensing to in vitro and in vivo imaging. Besides, drug or siRNA delivery based on DNA-templated QD assemblies will also be briefly discussed here.
Collapse
Affiliation(s)
- Yeling Yang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, People's Republic of China.
| | - Guobin Mao
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, People's Republic of China.
| | - Xinghu Ji
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, People's Republic of China.
| | - Zhike He
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, People's Republic of China.
| |
Collapse
|
15
|
High specific MNase assay for rapid identification of Staphylococcus aureus using AT-rich dsDNA substrate. Talanta 2019; 204:693-699. [DOI: 10.1016/j.talanta.2019.06.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 06/05/2019] [Accepted: 06/08/2019] [Indexed: 12/20/2022]
|
16
|
Qing T, Long C, Wang X, Zhang K, Zhang P, Feng B. Detection of micrococcal nuclease for identifying Staphylococcus aureus based on DNA templated fluorescent copper nanoclusters. Mikrochim Acta 2019; 186:248. [DOI: 10.1007/s00604-019-3363-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 03/09/2019] [Indexed: 02/07/2023]
|
17
|
Hunsur Ravikumar C, Ira Gowda M, Balakrishna RG. An “OFF–ON” quantum dot–graphene oxide bioprobe for sensitive detection of micrococcal nuclease ofStaphylococcus aureus. Analyst 2019; 144:3999-4005. [DOI: 10.1039/c8an02116c] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
mAb-Strep-QDs-GO probe in an OFF state due to energy transfer from QDs to GO turns into an ON state when the energy transfer is inhibited by MNase, thus allowing the sensing of MNase (Micrococcal Nuclease, an extracellular endonuclease ofStaphylococcus Aureus).
Collapse
|
18
|
Mao G, Zhang Q, Yang Y, Ji X, He Z. Facile synthesis of stable CdTe/CdS QDs using dithiol as surface ligand for alkaline phosphatase detection based on inner filter effect. Anal Chim Acta 2019; 1047:208-213. [DOI: 10.1016/j.aca.2018.10.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 09/29/2018] [Accepted: 10/08/2018] [Indexed: 12/11/2022]
|
19
|
Zhang Y, Zhang Y, Yang W, Bian L. Fluorescent reversible regulation based on photoinduced electron transfer from DNA to quantum dots and intercalation binding of DNA intercalator to DNA. Talanta 2018; 188:7-16. [DOI: 10.1016/j.talanta.2018.05.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 05/02/2018] [Accepted: 05/08/2018] [Indexed: 02/02/2023]
|
20
|
Feng Y, Liu L, Hu S, Ren Y, Liu Y, Xiu J, Zhang X. Four-photon-excited fluorescence resonance energy transfer in an aqueous system from ZnSe:Mn/ZnS quantum dots to hypocrellin A. OPTICS EXPRESS 2016; 24:19627-19637. [PMID: 27557241 DOI: 10.1364/oe.24.019627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, we established a fluorescence resonance energy transfer (FRET) system between ZnSe:Mn/ZnS quantum dots and Hypocrellin A (HA, a photosensitizer used for photodynamic therapy of cancer) in aqueous solution, excited by four-photon. Here, the QDs are the donors and the HA are the acceptors. The four-photon-excited fluorescence resonance energy transfer spectrum was obtained under 1300nm femtosecond laser pluses. The experimental results indicated that the highest efficiency of FRET can reach up to 61.3%. Furthermore, the viability test in cancer cells was further demonstrated for biological applications of FRET system. When FRET occurs the cell killing rate of the cancer cells will reach to 84.8% with the 1mM concentration of HA. Our work demonstrates that while the four-photon excited FRET system is promising in both optics and biological applications, is also needs further investigation.
Collapse
|
21
|
Hildebrandt N, Spillmann CM, Algar WR, Pons T, Stewart MH, Oh E, Susumu K, Díaz SA, Delehanty JB, Medintz IL. Energy Transfer with Semiconductor Quantum Dot Bioconjugates: A Versatile Platform for Biosensing, Energy Harvesting, and Other Developing Applications. Chem Rev 2016; 117:536-711. [DOI: 10.1021/acs.chemrev.6b00030] [Citation(s) in RCA: 457] [Impact Index Per Article: 57.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Niko Hildebrandt
- NanoBioPhotonics
Institut d’Electronique Fondamentale (I2BC), Université Paris-Saclay, Université Paris-Sud, CNRS, 91400 Orsay, France
| | | | - W. Russ Algar
- Department
of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Thomas Pons
- LPEM;
ESPCI Paris, PSL Research University; CNRS; Sorbonne Universités, UPMC, F-75005 Paris, France
| | | | - Eunkeu Oh
- Sotera Defense Solutions, Inc., Columbia, Maryland 21046, United States
| | - Kimihiro Susumu
- Sotera Defense Solutions, Inc., Columbia, Maryland 21046, United States
| | - Sebastian A. Díaz
- American Society for Engineering Education, Washington, DC 20036, United States
| | | | | |
Collapse
|
22
|
Wang Z, Yan TD, Susha AS, Chan MS, Kershaw SV, Lo PK, Rogach AL. Aggregation-free DNA nanocage/Quantum Dot complexes based on electrostatic adsorption. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
23
|
Shrivastava S, Sohn IY, Son YM, Lee WI, Lee NE. Real-time label-free quantitative fluorescence microscopy-based detection of ATP using a tunable fluorescent nano-aptasensor platform. NANOSCALE 2015; 7:19663-19672. [PMID: 26553481 DOI: 10.1039/c5nr05839b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Although real-time label-free fluorescent aptasensors based on nanomaterials are increasingly recognized as a useful strategy for the detection of target biomolecules with high fidelity, the lack of an imaging-based quantitative measurement platform limits their implementation with biological samples. Here we introduce an ensemble strategy for a real-time label-free fluorescent graphene (Gr) aptasensor platform. This platform employs aptamer length-dependent tunability, thus enabling the reagentless quantitative detection of biomolecules through computational processing coupled with real-time fluorescence imaging data. We demonstrate that this strategy effectively delivers dose-dependent quantitative readouts of adenosine triphosphate (ATP) concentration on chemical vapor deposited (CVD) Gr and reduced graphene oxide (rGO) surfaces, thereby providing cytotoxicity assessment. Compared with conventional fluorescence spectrometry methods, our highly efficient, universally applicable, and rational approach will facilitate broader implementation of imaging-based biosensing platforms for the quantitative evaluation of a range of target molecules.
Collapse
Affiliation(s)
- Sajal Shrivastava
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea.
| | - Il-Yung Sohn
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea.
| | - Young-Min Son
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea.
| | - Won-Il Lee
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea.
| | - Nae-Eung Lee
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea. and SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea
| |
Collapse
|
24
|
“Turn off–on” phosphorescent biosensors for detection of DNA based on quantum dots/acridine orange. Anal Biochem 2015; 475:32-9. [DOI: 10.1016/j.ab.2015.01.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Revised: 01/12/2015] [Accepted: 01/15/2015] [Indexed: 01/01/2023]
|
25
|
He Y, Jiao B. Simple and convenient G-quadruplex-based fluorescence assay of micrococcal nuclease activity. RSC Adv 2015. [DOI: 10.1039/c5ra20773h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
An ultrasensitive and straightforward fluorescence sensing platform for MNase activity has been developed based on NMM/G-quadruplexes.
Collapse
Affiliation(s)
- Yue He
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing)
- Ministry of Agriculture
- Citrus Research Institute
- Southwest University
- Chongqing
| | - Bining Jiao
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing)
- Ministry of Agriculture
- Citrus Research Institute
- Southwest University
- Chongqing
| |
Collapse
|
26
|
Sato S, Takenaka S. Highly sensitive nuclease assays based on chemically modified DNA or RNA. SENSORS (BASEL, SWITZERLAND) 2014; 14:12437-50. [PMID: 25019631 PMCID: PMC4168492 DOI: 10.3390/s140712437] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 06/25/2014] [Accepted: 07/09/2014] [Indexed: 02/06/2023]
Abstract
Nucleolytic enzymes are associated with various diseases, and several methods have been developed for their detection. DNase expression is modulated in such diseases as acute myocardial infarction, transient myocardial ischemia, oral cancer, stomach cancer, and malignant lymphoma, and DNase I is used in cystic fibroma therapy. RNase is used to treat mesothelial cancer because of its antiproliferative, cytotoxic, and antineoplastic activities. Angiogenin, an angiogenic factor, is a member of the RNase A family. Angiogenin inhibitors are being developed as anticancer drugs. In this review, we describe fluorometric and electrochemical techniques for detecting DNase and RNase in disease. Oligonucleotides having fluorescence resonance energy transfer (FRET)-causing chromophores are non-fluorescent by themselves, yet become fluorescent upon cleavage by DNase or RNase. These oligonucleotides serve as a powerful tool to detect activities of these enzymes and provide a basis for drug discovery. In electrochemical techniques, ferrocenyl oligonucleotides with or without a ribonucleoside unit are used for the detection of RNase or DNase. This technique has been used to monitor blood or serum samples in several diseases associated with DNase and RNase and is unaffected by interferents in these sample types.
Collapse
Affiliation(s)
- Shinobu Sato
- Department of Applied Chemistry and Research Center for Bio-Microsensing Technology, Kyushu Institute of Technology, Kitakyushu, Fukuoka 804-8550, Japan.
| | - Shigeori Takenaka
- Department of Applied Chemistry and Research Center for Bio-Microsensing Technology, Kyushu Institute of Technology, Kitakyushu, Fukuoka 804-8550, Japan.
| |
Collapse
|
27
|
Huang S, Zhu F, Qiu H, Xiao Q, Zhou Q, Su W, Hu B. A sensitive quantum dots-based "OFF-ON" fluorescent sensor for ruthenium anticancer drugs and ctDNA. Colloids Surf B Biointerfaces 2014; 117:240-7. [PMID: 24657609 DOI: 10.1016/j.colsurfb.2014.02.031] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Revised: 02/17/2014] [Accepted: 02/19/2014] [Indexed: 12/11/2022]
Abstract
In this contribution, a simple and sensitive fluorescent sensor for the determination of both the three ruthenium anticancer drugs (1 to 3) and calf thymus DNA (ctDNA) was established based on the CdTe quantum dots (QDs) fluorescence "OFF-ON" mode. Under the experimental conditions, the fluorescence of CdTe QDs can be effectively quenched by ruthenium anticancer drugs because of the surface binding of these drugs on CdTe QDs and the subsequent photoinduced electron transfer (PET) process from CdTe QDs to ruthenium anticancer drugs, which render the system into fluorescence "OFF" status. The system can then be "ON" after the addition of ctDNA which brought the restoration of CdTe QDs fluorescence intensity, since ruthenium anticancer drugs broke away from the surface of CdTe QDs and inserted into double helix structure of ctDNA. The fluorescence quenching effect of the CdTe QDs-ruthenium anticancer drugs systems was mainly concentration dependent, which could be used to detect three ruthenium anticancer drugs. The limits of detection were 5.5 × 10(-8) M for ruthenium anticancer drug 1, 7.0 × 10(-8) M for ruthenium anticancer drug 2, and 7.9× 10(-8) M for ruthenium anticancer drug 3, respectively. The relative restored fluorescence intensity was directly proportional to the concentration of ctDNA in the range of 1.0 × 10(-8) M ∼ 3.0 × 10(-7) M, with a correlation coefficient (R) of 0.9983 and a limit of detection of 1.1 × 10(-9) M. The relative standard deviation (RSD) for 1.5 × 10(-7) M ctDNA was 1.5% (n = 5). There was almost no interference to some common chemical compounds, nucleotides, amino acids, and proteins. The proposed method was applied to the determination of ctDNA in three synthetic samples with satisfactory results. The possible reaction mechanism of CdTe QDs fluorescence "OFF-ON" was further investigated. This simple and sensitive approach possessed some potential applications in the investigation of interaction between drug molecules and DNA.
Collapse
Affiliation(s)
- Shan Huang
- College of Chemistry and Life Science, Guangxi Teachers Education University, Nanning 530001, PR China.
| | - Fawei Zhu
- College of Chemistry and Life Science, Guangxi Teachers Education University, Nanning 530001, PR China
| | - Hangna Qiu
- College of Chemistry and Life Science, Guangxi Teachers Education University, Nanning 530001, PR China
| | - Qi Xiao
- College of Chemistry and Life Science, Guangxi Teachers Education University, Nanning 530001, PR China.
| | - Quan Zhou
- College of Chemistry and Life Science, Guangxi Teachers Education University, Nanning 530001, PR China
| | - Wei Su
- College of Chemistry and Life Science, Guangxi Teachers Education University, Nanning 530001, PR China.
| | - Baoqing Hu
- Key Laboratory of Beibu Gulf Environment Change and Resources Utilization (Guangxi Teachers Education University), Ministry of Education, China
| |
Collapse
|
28
|
“Turn off–on” fluorescent sensor for platinum drugs-DNA interactions based on quantum dots. Biosens Bioelectron 2014; 52:29-35. [DOI: 10.1016/j.bios.2013.08.031] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 08/18/2013] [Accepted: 08/19/2013] [Indexed: 01/11/2023]
|
29
|
Yeh YC, Saha K, Yan B, Miranda OR, Yu X, Rotello VM. The role of ligand coordination on the cytotoxicity of cationic quantum dots in HeLa cells. NANOSCALE 2013; 5:12140-12143. [PMID: 24173625 PMCID: PMC3858971 DOI: 10.1039/c3nr04037b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The effect of ligand structure on the cytotoxicity of cationic CdSe/ZnS quantum dots (QDs) was systematically investigated using mono- and bidentate ligands. Monothiol-functionalized QDs are more cytotoxic than dithiol-functionalized QDs.
Collapse
Affiliation(s)
- Yi-Cheun Yeh
- Department of Chemistry, 710 North Pleasant St, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| | - Krishnendu Saha
- Department of Chemistry, 710 North Pleasant St, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| | - Bo Yan
- Department of Chemistry, 710 North Pleasant St, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| | - Oscar R. Miranda
- Department of Chemistry, 710 North Pleasant St, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| | - Xi Yu
- Department of Chemistry, 710 North Pleasant St, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| | - Vincent M. Rotello
- Department of Chemistry, 710 North Pleasant St, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| |
Collapse
|
30
|
Huang S, Qiu H, Xiao Q, Huang C, Su W, Hu B. A Simple QD–FRET Bioprobe for Sensitive and Specific Detection of Hepatitis B Virus DNA. J Fluoresc 2013; 23:1089-98. [DOI: 10.1007/s10895-013-1238-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 05/14/2013] [Indexed: 01/24/2023]
|
31
|
Chen G, Song F, Xiong X, Peng X. Fluorescent Nanosensors Based on Fluorescence Resonance Energy Transfer (FRET). Ind Eng Chem Res 2013. [DOI: 10.1021/ie303485n] [Citation(s) in RCA: 204] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Gengwen Chen
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Hi-tech
Zone, Dalian 116024, People’s Republic of China
| | - Fengling Song
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Hi-tech
Zone, Dalian 116024, People’s Republic of China
| | - Xiaoqing Xiong
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Hi-tech
Zone, Dalian 116024, People’s Republic of China
| | - Xiaojun Peng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Hi-tech
Zone, Dalian 116024, People’s Republic of China
| |
Collapse
|
32
|
Preparation of liposomes loaded with quantum dots, fluorescence resonance energy transfer studies, and near-infrared in-vivo imaging of mouse tissue. Mikrochim Acta 2012. [DOI: 10.1007/s00604-012-0907-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
33
|
A universal and label-free aptasensor for fluorescent detection of ATP and thrombin based on SYBR Green I dye. Biosens Bioelectron 2012. [PMID: 23202351 DOI: 10.1016/j.bios.2012.10.064] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A facile and universal aptamer-based label-free approach for selective and sensitive fluorescence detection of proteins and small biomolecules by using the SYBR Green I (SGI) dye is developed. This robust versatile biosensing strategy relies on fluorescence turn-off changes of SGI, resulting from target-induced structure switching of aptamers. Upon binding with the targets, the aptamers dissociate from the respective cDNA/aptamer duplexes, leading to the release of the dsDNA-intercalated SGI into solution and the quenching of the corresponding fluorescence intensities. Such target-induced conformational changes and release of aptamers from the DNA duplexes essentially lead to the change in the fluorescence signal of the SGI and thus constitute the mechanism of our aptamer-based label-free fluorescence biosensor for specific target analyses. Under optimized conditions, our method exhibits high sensitivity and selectivity for the quantification of ATP and thrombin with low detection limits (23.4 nM and 1.1 nM, respectively). Compared with previous reported methods for aptamer-based detection of ATP and thrombin, this label-free approach is selective, simple, convenient and cost-efficient without any chemical labeling of the probe or the target. Therefore, the present strategy could be easily applicable to biosensors that target a wide range of biomolecules.
Collapse
|
34
|
An ultra-high sensitive platform for fluorescence detection of micrococcal nuclease based on graphene oxide. Biosens Bioelectron 2012; 42:467-73. [PMID: 23238320 DOI: 10.1016/j.bios.2012.10.045] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2012] [Revised: 09/30/2012] [Accepted: 10/11/2012] [Indexed: 11/24/2022]
Abstract
Micrococcal nuclease (MNase) is the extracellular nuclease of Staphylococcus aureus (S. aureus). It preferentially digests single-stranded nucleic acids. The existence of MNase can be the standard to identify S. aureus and the content of MNase can be used to evaluate the pathogenicity of S. aureus. Herein, an ultra-high sensitive and selective fluorescent sensing platform for MNase is developed based on MNase-induced DNA strand scission and the difference in affinity of graphene oxide (GO) for single-stranded DNA containing different numbers of bases in length. In the absence of MNase, the adsorption of the dye-labeled ssDNA on GO makes the dyes close proximity to GO surface resulting in high efficiency quenching of fluorescence of the dyes. Conversely, and very importantly, in the presence of MNase, it cleaves the dye-labeled ssDNA into small fragments. The introduction of GO into the sensing solution results in weak quenching of the fluorescence of the dyes due to the weak affinity of the short dye-labeled oligonuleotide fragment to GO, and the fluorescence intensity gradually increases with increasing concentration of MNase. MNase can be detected in a range of 8×10⁻⁵ to 1.6×10⁻³ unit/mL with a detection limit of 2.7×10⁻⁵ unit/mL and good selectivity. The detection limit is of two orders of magnitude lower than those reported fluorescence MNase assays. Moreover, when the GO-based biosensor is used in S. aureus sample assays, preeminent fluorescence signals are obtained, thus the platform of the GO-based biosensor can be used to detect MNase in real-world samples.
Collapse
|
35
|
Chen Y, Wang L, Jiang W. Micrococcal nuclease detection based on peptide-bridged energy transfer between quantum dots and dye-labeled DNA. Talanta 2012; 97:533-8. [DOI: 10.1016/j.talanta.2012.05.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2012] [Revised: 05/03/2012] [Accepted: 05/08/2012] [Indexed: 11/29/2022]
|
36
|
Deng J, Jin Y, Chen G, Wang L. Label-free fluorescent assay for real-time monitoring site-specific DNA cleavage by EcoRI endonuclease. Analyst 2012; 137:1713-7. [PMID: 22354164 DOI: 10.1039/c2an16287c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DNA cleavage reaction catalyzed by nucleases is essential in many important biological processes and medicinal chemistry. Therefore, it is important to develop reliable and facile methods to assay nuclease activity. With this goal in mind, we report a fluorescent assay for label-free, facile, and real-time monitoring of DNA cleavage by EcoRI endonuclease using SYBR Green I (SGI) as a signal probe. The fluorescence of SGI dramatically increased when the free SGI was mixed with double-stranded DNA (dsDNA) substrate. Upon interacting with EcoRI, which cleaves the dsDNA into small fragments, the weakened interaction between SGI and the shortened DNA fragments caused a decrease in fluorescence of SGI. EcoRI-DNA interaction was real-time studied by monitoring fluorescence change with the prolonging of interaction time. The important kinetic parameters, including Michaelis-Menten constant (K(M)) and maximum initial velocity (V(max)), were accurately calculated, which is consistent with previously reported studies. Site-specific DNA cleavage by EcoRI endonuclease has also been verified by gel electrophoresis analysis, which indicated that this method is a simple and effective approach to assay DNA cleavage reaction. Specificity investigation demonstrated that EcoRI-DNA interactions can be studied with high selectivity. Compared with previously reported methods, this approach is selective, simple, convenient and cost-efficient without any labeling of the probe or of the target.
Collapse
Affiliation(s)
- Jing Deng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemistry Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | | | | | | |
Collapse
|
37
|
Qiu T, Zhang B, Hu ZY, Tang JH, Xie HP, Gu BR. Detection of DNA based on fluorescence resonance energy transfer of polyelectrolyte-protected CdTe quantum dots as energy donors. Analyst 2012; 137:2608-13. [DOI: 10.1039/c2an35229j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
38
|
Zhou G, Wang P, Yuan J, Qiu T, He Z. Immunomagnetic assay combined with CdSe/ZnS amplification of chemiluminescence for the detection of abscisic acid. Sci China Chem 2011. [DOI: 10.1007/s11426-011-4326-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
39
|
Yeh YC, Patra D, Yan B, Saha K, Miranda OR, Kim CK, Rotello VM. Synthesis of cationic quantum dots via a two-step ligand exchange process. Chem Commun (Camb) 2011; 47:3069-71. [PMID: 21305071 DOI: 10.1039/c0cc04975a] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A new class of quaternary ammonium derivatives has been used to synthesize cationic CdSe/ZnS quantum dots with exceptional stability in water as well as in biological media.
Collapse
Affiliation(s)
- Yi-Cheun Yeh
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
| | | | | | | | | | | | | |
Collapse
|
40
|
Liu L, Li H, Qiu T, Zhou G, Wong KY, He Z, Liu Z. Construction of a molecular beacon based on two-photon excited fluorescence resonance energy transfer with quantum dot as donor. Chem Commun (Camb) 2011; 47:2622-4. [DOI: 10.1039/c0cc04712k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|