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Drozd M, Kobylska E, Żmieńko M, Chudy M. Sensitive and label-free SPR biosensing platforms for high-throughput screening of plasma membrane receptors interactions with insulin-like targets of hypoglycaemic activity. Talanta 2024; 274:125914. [PMID: 38537356 DOI: 10.1016/j.talanta.2024.125914] [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: 11/17/2023] [Revised: 03/05/2024] [Accepted: 03/11/2024] [Indexed: 05/04/2024]
Abstract
Progress in medical sciences aims for tailored therapy of civilization diseases like diabetes. Preclinical screening of new medicines superior to insulin should include the verification of their affinity to the membrane receptors naturally stimulated by this hormone: insulin receptor isoforms A and B and insulin-like growth factor receptor. Considering that the affinity constants obtained using different experimental conditions are incomparable, it is essential to develop a robust and reliable method to analyze these interactions. The versatile SPR platform developed in this study enables the evaluation of the bioactivity of hypoglycaemic molecules. Thanks to the comprehensive characterization of miscellaneous aspects of the analytical platform, including the design of the SPR biosensor receptor layer, ensuring interaction specificity, as well as the quality control of the standards used (human insulin, HI; long-acting insulin analog: glargine, Gla), the feasibility of the method of equilibrium and kinetic constants determination for insulin-like targets was confirmed. SPR assays constructed in the direct format using IR-A, IR-B, and IGF1-R receptor proteins show high sensitivities and low detection limits towards insulin and glargine detection in the range of 18.3-53.3 nM with no signs of mass transport limitations. The improved analytical performance and stability of SPR biosensors favor the acquisition of good-quality kinetic data, while preservation of receptors activity after binding to long-chain carboxymethyldextran, combined with spontaneous regeneration, results in stability and long shelf life of the biosensor, which makes it useful for label-free insulin analogs biosensing and thus extensive screening in diabetic drugs discovery.
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Affiliation(s)
- Marcin Drozd
- Chair of Medical Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664, Warsaw, Poland; Centre for Advanced Materials and Technologies CEZAMAT, Poleczki 19, 02-822, Warsaw, Poland
| | - Ewa Kobylska
- Chair of Medical Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664, Warsaw, Poland; Łukasiewicz - Industrial Chemistry Institute, Rydygiera 8, 01-793, Warsaw, Poland
| | - Małgorzata Żmieńko
- Chair of Medical Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664, Warsaw, Poland
| | - Michał Chudy
- Chair of Medical Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664, Warsaw, Poland.
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2
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Wang Y, Liu G, Liu X, Chen M, Zeng Y, Li Y, Wu X, Wang X, Sheng J. Serpentine Enhances Insulin Regulation of Blood Glucose through Insulin Receptor Signaling Pathway. Pharmaceuticals (Basel) 2022; 16:ph16010016. [PMID: 36678512 PMCID: PMC9861791 DOI: 10.3390/ph16010016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/09/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
Insulin sensitizers targeting insulin receptors (IR) are a potential drug for the treatment of diabetes. Serpentine is an alkaloid component in the root of Catharanthus roseus (L.) G. Don. Serpentine screened by surface plasmon resonance (SPR) technology has the ability to target IR. The objective of this study was to investigate whether serpentine could modulate the role of insulin in regulating blood glucose through insulin receptors in cells and in animal models of diabetes. SPR technology was used to detect the affinity of different concentrations of serpentine with insulin receptors. The Western blotting method was used to detect the expression levels of key proteins of the insulin signaling pathway in C2C12 cells and 3T3-L1 cells as well as in muscle and subcutaneous adipose tissue of diabetic mice after serpentine and insulin treatment. Diabetic mice were divided into four groups and simultaneously injected with insulin or serpentine, and the blood glucose concentration and serum levels of insulin, glucagon, and C-peptide were measured 150 min later. mRNA levels of genes related to lipid metabolism and glucose metabolism in liver, muscle, and subcutaneous adipose tissue were detected by RT-PCR. Serpentine was able to bind to the extracellular domain of IR with an affinity of 2.883 × 10-6 M. Serpentine combined with insulin significantly enhanced the ability of insulin to activate the insulin signaling pathway and significantly enhanced the glucose uptake capacity of C2C12 cells. Serpentine enhanced the ability of low-dose insulin (1 nM) and normal-dose insulin (100 nM) to activate the insulin signaling pathway. Serpentine also independently activated AMPK phosphorylation, thus stimulating glucose uptake by C2C12 cells. In high-fat-diet/streptozotocin (HFD/STZ)-induced diabetic mice, serpentine significantly prolonged the hypoglycemic time of insulin, significantly reduced the use of exogenous insulin, and inhibited endogenous insulin secretion. In addition, serpentine alone significantly increased the expression of GSK-3β mRNA in muscle tissue, thus enhancing glucose uptake, and at the same time, serpentine significantly increased glucagon secretion and liver gluconeogenesis. Serpentine enhances the ability of insulin to regulate blood glucose through the insulin receptor, and can also regulate blood glucose alone, but it has a negative regulation mechanism and cannot produce a hypoglycemic effect. Therefore, serpentine may be useful as an insulin sensitizer to assist insulin to lower blood glucose.
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Affiliation(s)
- Yinghao Wang
- Key Laboratory of Puer Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China
- Scientific Observing and Experimental Station of Tea Resources and Processing in Yunnan, Ministry of Agriculture, Kunming 650201, China
- Department of Science, Yunnan Agricultural University, Kunming 650201, China
| | - Guanfu Liu
- Key Laboratory of Puer Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China
- Scientific Observing and Experimental Station of Tea Resources and Processing in Yunnan, Ministry of Agriculture, Kunming 650201, China
| | - Xutao Liu
- Key Laboratory of Puer Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China
- Scientific Observing and Experimental Station of Tea Resources and Processing in Yunnan, Ministry of Agriculture, Kunming 650201, China
| | - Minhua Chen
- Key Laboratory of Puer Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China
- Scientific Observing and Experimental Station of Tea Resources and Processing in Yunnan, Ministry of Agriculture, Kunming 650201, China
| | - Yuping Zeng
- Key Laboratory of Puer Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China
- Scientific Observing and Experimental Station of Tea Resources and Processing in Yunnan, Ministry of Agriculture, Kunming 650201, China
| | - Yuyan Li
- Department of Science, Yunnan Agricultural University, Kunming 650201, China
| | - Xiaoyun Wu
- Key Laboratory of Puer Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China
- Scientific Observing and Experimental Station of Tea Resources and Processing in Yunnan, Ministry of Agriculture, Kunming 650201, China
- Department of Science, Yunnan Agricultural University, Kunming 650201, China
- Correspondence: (X.W.); (X.W.); (J.S.)
| | - Xuanjun Wang
- Key Laboratory of Puer Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China
- Scientific Observing and Experimental Station of Tea Resources and Processing in Yunnan, Ministry of Agriculture, Kunming 650201, China
- Yunnan Research Institute for Local Plateau Agriculture and Industry, Kunming 650201, China
- Correspondence: (X.W.); (X.W.); (J.S.)
| | - Jun Sheng
- Key Laboratory of Puer Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China
- Scientific Observing and Experimental Station of Tea Resources and Processing in Yunnan, Ministry of Agriculture, Kunming 650201, China
- Correspondence: (X.W.); (X.W.); (J.S.)
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Occurrence, analysis and removal of pesticides, hormones, pharmaceuticals, and other contaminants in soil and water streams for the past two decades: a review. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04778-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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4
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Liu B, Zhang Y, Hao Y, Zhu X, Zhang Y, Zhou Y, Tan H, Xu M. All-in-One Luminescent Lanthanide Coordination Polymer Nanoprobe for Facile Detection of Protein Kinase Activity. Anal Chem 2022; 94:10730-10736. [DOI: 10.1021/acs.analchem.2c01307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Baoxia Liu
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering, Henan Joint International Research Laboratory of Chemo/Biosensing and Early Diagnosis of Major Diseases, Shangqiu Normal University, Shangqiu 476000, Henan Province, PR China
| | - Yaoyao Zhang
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering, Henan Joint International Research Laboratory of Chemo/Biosensing and Early Diagnosis of Major Diseases, Shangqiu Normal University, Shangqiu 476000, Henan Province, PR China
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, PR China
| | - Yuanqiang Hao
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering, Henan Joint International Research Laboratory of Chemo/Biosensing and Early Diagnosis of Major Diseases, Shangqiu Normal University, Shangqiu 476000, Henan Province, PR China
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, PR China
| | - Xu Zhu
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering, Henan Joint International Research Laboratory of Chemo/Biosensing and Early Diagnosis of Major Diseases, Shangqiu Normal University, Shangqiu 476000, Henan Province, PR China
| | - Yintang Zhang
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering, Henan Joint International Research Laboratory of Chemo/Biosensing and Early Diagnosis of Major Diseases, Shangqiu Normal University, Shangqiu 476000, Henan Province, PR China
| | - Yanli Zhou
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering, Henan Joint International Research Laboratory of Chemo/Biosensing and Early Diagnosis of Major Diseases, Shangqiu Normal University, Shangqiu 476000, Henan Province, PR China
| | - Hongliang Tan
- College of Biological and Food Engineering, Huaihua University, Huaihua 418000, PR China
| | - Maotian Xu
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering, Henan Joint International Research Laboratory of Chemo/Biosensing and Early Diagnosis of Major Diseases, Shangqiu Normal University, Shangqiu 476000, Henan Province, PR China
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5
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Zhao J, Yang L, Dai Y, Tang Y, Gong X, Du D, Cao Y. Peptide-templated multifunctional nanoprobe for feasible electrochemical assay of intracellular kinase. Biosens Bioelectron 2018; 119:42-47. [DOI: 10.1016/j.bios.2018.07.063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 07/23/2018] [Accepted: 07/28/2018] [Indexed: 01/03/2023]
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6
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Gu C, Gai P, Han L, Yu W, Liu Q, Li F. Enzymatic biofuel cell-based self-powered biosensing of protein kinase activity and inhibition via thiophosphorylation-mediated interface engineering. Chem Commun (Camb) 2018; 54:5438-5441. [DOI: 10.1039/c8cc02328j] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We developed a facile and ultrasensitive EBFC-based self-powered biosensor of protein kinase A activity and inhibition via thiophosphorylation-mediated interface engineering.
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Affiliation(s)
- Chengcheng Gu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- P. R. China
| | - Panpan Gai
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- P. R. China
| | - Lei Han
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- P. R. China
| | - Wen Yu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- P. R. China
| | - Qingyun Liu
- College of Chemical and Environmental Engineering
- Shandong University of Science and Technology
- Qingdao 266510
- P. R. China
| | - Feng Li
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- P. R. China
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7
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Li X, Zhou Y, Xu Y, Xu H, Wang M, Yin H, Ai S. A novel photoelectrochemical biosensor for protein kinase activity assay based on phosphorylated graphite-like carbon nitride. Anal Chim Acta 2016; 934:36-43. [DOI: 10.1016/j.aca.2016.06.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 06/09/2016] [Accepted: 06/16/2016] [Indexed: 10/21/2022]
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8
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Xiao L, Liu S, Lin L, Yao S. A CIEF-LIF method for simultaneous analysis of multiple protein kinases and screening of inhibitors. Electrophoresis 2016; 37:2075-82. [DOI: 10.1002/elps.201600090] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 04/06/2016] [Accepted: 04/15/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Lixia Xiao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering; Hunan University; Changsha P. R. China
| | - Shengquan Liu
- College of Chemistry and Chemical Engineering; Hunan Normal University; Changsha P. R. China
| | - Lihua Lin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering; Hunan University; Changsha P. R. China
| | - Shouzhuo Yao
- College of Chemistry and Chemical Engineering; Hunan Normal University; Changsha P. R. China
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9
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Wu S, Kong XJ, Cen Y, Yu RQ, Chu X. Phosphorylation-induced formation of a cytochrome c-peptide complex: a novel fluorescent sensing platform for protein kinase assay. Chem Commun (Camb) 2016; 52:776-9. [DOI: 10.1039/c5cc07545a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel fluorescent sensing platform has been developed for protein kinase assay based on the phosphorylation-induced formation of a cytochrome c-peptide complex.
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Affiliation(s)
- Shuang Wu
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Xiang-Juan Kong
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Yao Cen
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Ru-Qin Yu
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Xia Chu
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
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10
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Yin C, Wang M, Lei C, Wang Z, Li P, Li Y, Li W, Huang Y, Nie Z, Yao S. Phosphorylation-Mediated Assembly of a Semisynthetic Fluorescent Protein for Label-Free Detection of Protein Kinase Activity. Anal Chem 2015; 87:6311-8. [DOI: 10.1021/acs.analchem.5b01160] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Chao Yin
- State Key Laboratory of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha, P. R. China
| | - Ming Wang
- State Key Laboratory of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha, P. R. China
| | - Chunyang Lei
- State Key Laboratory of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha, P. R. China
| | - Zhen Wang
- State Key Laboratory of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha, P. R. China
| | - Pei Li
- State Key Laboratory of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha, P. R. China
| | - Yong Li
- State Key Laboratory of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha, P. R. China
| | - Wang Li
- State Key Laboratory of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha, P. R. China
| | - Yan Huang
- State Key Laboratory of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha, P. R. China
| | - Zhou Nie
- State Key Laboratory of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha, P. R. China
| | - Shouzhuo Yao
- State Key Laboratory of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha, P. R. China
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11
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Shen C, Xia X, Hu S, Yang M, Wang J. Silver nanoclusters-based fluorescence assay of protein kinase activity and inhibition. Anal Chem 2015; 87:693-8. [PMID: 25517425 DOI: 10.1021/ac503492k] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A simple and sensitive fluorescence method for monitoring the activity and inhibition of protein kinase (PKA) has been developed using polycytosine oligonucleotide (dC12)-templated silver nanoclusters (Ag NCs). Adenosine-5'-triphosphate (ATP) was found to enhance the fluorescence of Ag NCs, while the hydrolysis of ATP to adenosine diphosphate (ADP) by PKA decreased the fluorescence of Ag NCs. Compared to the existing methods for kinase activity assay, the developed method does not involve phosphorylation of the substrate peptides, which significantly simplifies the detection procedures. The method exhibits high sensitivity, good selectivity, and wide linear range toward PKA detection. The inhibition effect of kinase inhibitor H-89 on the activity of PKA was also studied. The sensing protocol was also applied to the assay of drug-stimulated activation of PKA in HeLa cell lysates.
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Affiliation(s)
- Congcong Shen
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, China
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12
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Song W, Liang RP, Wang Y, Zhang L, Qiu JD. Green synthesis of peptide-templated gold nanoclusters as novel fluorescence probes for detecting protein kinase activity. Chem Commun (Camb) 2015; 51:10006-9. [DOI: 10.1039/c5cc02280k] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A green method was employed for synthesizing peptide-templated nanoclusters without requiring strong reducing agents. Using synthetic peptide–gold nanoclusters as fluorescence probes, a novel assay for detecting protein kinase is developed.
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Affiliation(s)
- Wei Song
- Department of Chemistry
- Nanchang University
- Nanchang 330031
- China
| | - Ru-Ping Liang
- Department of Chemistry
- Nanchang University
- Nanchang 330031
- China
| | - Ying Wang
- Department of Chemistry
- Nanchang University
- Nanchang 330031
- China
| | - Li Zhang
- Department of Chemistry
- Nanchang University
- Nanchang 330031
- China
| | - Jian-Ding Qiu
- Department of Chemistry
- Nanchang University
- Nanchang 330031
- China
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Lei C, Xu X, Zhou J, Liu X, Nie Z, Qing M, Li P, Huang Y, Yao S. A Mix-and-Read Fluorescence Strategy for the Switch-On Probing of Kinase Activity Based on an Aptameric-Peptide/Graphene-Oxide Platform. Chem Asian J 2014; 9:2560-7. [DOI: 10.1002/asia.201402221] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Indexed: 11/08/2022]
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Bhalla N, Di Lorenzo M, Pula G, Estrela P. Protein phosphorylation analysis based on proton release detection: potential tools for drug discovery. Biosens Bioelectron 2013; 54:109-14. [PMID: 24252767 DOI: 10.1016/j.bios.2013.10.037] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 10/08/2013] [Accepted: 10/21/2013] [Indexed: 11/27/2022]
Abstract
Phosphorylation is the most important post-translational modification of proteins in eukaryotic cells and it is catalysed by enzymes called kinases. The balance between protein phosphorylation and dephosphorylation is critical for the regulation of physiological processes and its unbalance is the cause of several diseases. Conventional assays used to analyse the kinase activity are limited as they rely heavily on phospho-specific antibodies and radioactive tags. This makes their use impractical for high throughput drug discovery platforms. We have developed two versatile methods to detect the release of protons (H(+)) associated with the protein phosphorylation catalysed by kinases. The first approach is based on the pH-sensitive response of oxide-semiconductor interfaces and the second method detects the pH changes in phosphorylation reaction using a commercial micro-pH electrode. The proposed methods successfully detected phosphorylation of myelin basic protein by PKC-α kinase. These techniques can be readily adopted for multiplexed arrays and high throughput analysis of kinase activity, which will represent an important innovation in biomedical research and drug discovery.
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Affiliation(s)
- Nikhil Bhalla
- Department of Electronic & Electrical Engineering, University of Bath, Bath BA2 7AY, United Kingdom.
| | - Mirella Di Lorenzo
- Department of Chemical Engineering, University of Bath, Bath BA2 7AY, United Kingdom.
| | - Giordano Pula
- Department of Pharmacy & Pharmacology, University of Bath, Bath BA2 7AY, United Kingdom.
| | - Pedro Estrela
- Department of Electronic & Electrical Engineering, University of Bath, Bath BA2 7AY, United Kingdom.
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Zhou J, Xu X, Liu X, Li H, Nie Z, Qing M, Huang Y, Yao S. A gold nanoparticles colorimetric assay for label-free detection of protein kinase activity based on phosphorylation protection against exopeptidase cleavage. Biosens Bioelectron 2013; 53:295-300. [PMID: 24157613 DOI: 10.1016/j.bios.2013.09.070] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 09/17/2013] [Accepted: 09/26/2013] [Indexed: 11/20/2022]
Abstract
Protein kinases are significant regulators in the cell signaling pathways, and it is still greatly desirable to achieve simple and quick kinase detection. Herein, we present a novel colorimetric gold nanoparticles (AuNPs)/peptide platform for probing the activity and inhibition of protein kinases based on phosphorylation-induced suppression of carboxypeptidase Y (CPY) cleavage. This AuNPs/peptide platform can easily monitor the kinase activity by a UV-vis spectrometer or even by the naked eye. The feasibility of the method has been demonstrated by sensitive measurement of the cAMP-dependent protein kinase (PKA) activity with a low detection limit of 0.232 mU/µL and assessment of kinase inhibition by H-89 with an IC50 value of 18.13 nM. The assay was also successfully put into practice for the detection of kinase activity in cell lysate. Because of its label-free, homogenous and colorimetric merits, the proposed assay presents great potential in high-throughput screening for kinase-targeted drug discovery.
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Affiliation(s)
- Jiang Zhou
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
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Fluorescent detection of protein kinase based on zirconium ions-immobilized magnetic nanoparticles. Anal Chim Acta 2013; 780:89-94. [DOI: 10.1016/j.aca.2013.03.070] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 03/24/2013] [Accepted: 03/26/2013] [Indexed: 12/23/2022]
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17
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Bai J, Zhao Y, Wang Z, Liu C, Wang Y, Li Z. Dual-readout fluorescent assay of protein kinase activity by use of TiO2-coated magnetic microspheres. Anal Chem 2013; 85:4813-21. [PMID: 23581884 DOI: 10.1021/ac400799w] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A simple, highly sensitive, and dual-readout fluorescent assay is developed for the detection of protein kinase activity based on the specific recognition utility of TiO2-coated Fe3O4/SiO2 magnetic microspheres (TMSPs) for kinase-induced phosphopeptides. When the fluorophore-labeled substrate peptides are phosphorylated by the kinase reaction, they can bind specifically to the TiO2 layer of TMSPs by means of phosphate groups, resulting in fluorophore enrichment on the TMSP surfaces. The accumulated fluorophores on the TMSPs are proportional to the kinase activity, and the fluorescence signal readout could be run through either direct fluorescent imaging of the TMSPs or measurement of the fluorescence intensity by simply detaching the fluorescent phosphopeptides into the solution. The TMSPs exhibit extremely high selectivity for capturing phosphorylated peptides over the nonphosphorylated ones, resulting in an ultrahigh fluorescence signal-to-background ratio of 42, which is the highest fluorescence change thus far in fluorescent assays for detection of protein kinase activities. Therefore, the proposed fluorescent assay presents high sensitivity, low detection limit of 0.1 milliunit/μL, and wide dynamic range from 0.5 milliunit/μL to 0.5 unit/μL with protein kinase A (PKA) as a model target. Moreover, the TMSP-based fluorescent assay can simultaneously quantify multiple kinase activities with their specific peptides labeled with different dyes. This new strategy is also successfully applied to monitoring drug-triggered PKA activation in cell lysates. Therefore, the TMSP-based fluorescent assay is very promising in high-throughput screening of kinase inhibitors and in highly sensitive detection of kinase activity, and thus it is a valuable tool for development of targeted therapy, clinical diagnosis, and studies of fundamental life science.
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Affiliation(s)
- Jie Bai
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, Hebei Province, People's Republic of China
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Chen Z, He X, Wang Y, Wang K, Du Y, Yan G. Ru(II) encapsulated phosphorylate-terminated silica nanoparticles-based electrochemiluminescent strategy for label-free assay of protein kinase activity and inhibition. Biosens Bioelectron 2013; 41:519-25. [DOI: 10.1016/j.bios.2012.09.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Revised: 09/08/2012] [Accepted: 09/12/2012] [Indexed: 10/27/2022]
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Martić S, Labib M, Kraatz HB. Electrochemical investigations of sarcoma-related protein kinase inhibition. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.05.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Martić S, Rains MK, Freeman D, Kraatz HB. Use of 5'-γ-ferrocenyl adenosine triphosphate (Fc-ATP) bioconjugates having poly(ethylene glycol) spacers in kinase-catalyzed phosphorylations. Bioconjug Chem 2011; 22:1663-72. [PMID: 21696155 DOI: 10.1021/bc200229y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The 5'-γ-ferrocenyl adenosine triphosphate (Fc-ATP) bioconjugates (3 and 4), containing the poly(ethylene glycol) spacers, were synthesized and compared to a hydrophobic analogue as co-substrates for the following protein kinases: sarcoma related kinase (Src), cyclin-dependent kinase (CDK), casein kinase II (CK2α), and protein kinase A (PKA). Electrochemical kinase assays indicate that the hydrophobic Fc-ATP analogue was an optimal co-substrate for which K(M) values were determined to be in the 30-200 μM range, depending on the particular protein kinase. The luminescence kinase assay demonstrated the kinase utility for all Fc-ATP conjugates, which is in line with the electrochemical data. Moreover, Fc-ATP bioconjugates exhibit competitive behavior with respect to ATP. Relatively poor performance of the polar Fc-ATP bioconjugates as co-substrates for protein kinases was presumably due to the additional H-bonding and electrostatic interactions of the poly(ethylene glycol) linkers of Fc-ATP with the kinase catalytic site and the target peptides. Phosphorylation of the full-length protein, His-tagged pro-caspase-3, was demonstrated through Fc-phosphoamide transfer to the Ser residues of the surface-bound protein by electrochemical means. These results suggest that electrochemical detection of the peptide and protein Fc-phosphorylation via tailored Fc-ATP co-substrates may be useful for probing protein-protein interactions.
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Affiliation(s)
- Sanela Martić
- Chemistry Department, The University of Western Ontario, London, Ontario, Canada
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21
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Xu X, Liu X, Nie Z, Pan Y, Guo M, Yao S. Label-Free Fluorescent Detection of Protein Kinase Activity Based on the Aggregation Behavior of Unmodified Quantum Dots. Anal Chem 2010; 83:52-9. [DOI: 10.1021/ac102786c] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xiahong Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Xin Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Zhou Nie
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Yuliang Pan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Manli Guo
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Shouzhuo Yao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
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22
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McFadden MJ, Junop MS, Brennan JD. Magnetic “Fishing” Assay To Screen Small-Molecule Mixtures for Modulators of Protein−Protein Interactions. Anal Chem 2010; 82:9850-7. [PMID: 21067198 DOI: 10.1021/ac102164d] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Meghan J. McFadden
- Chemical Biology Graduate Program, Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1, and Department of Biochemistry and Biomedical Engineering, McMaster University, 1200 Main Street West, Hamilton, Ontario L8N 3Z5, Canada
| | - Murray S. Junop
- Chemical Biology Graduate Program, Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1, and Department of Biochemistry and Biomedical Engineering, McMaster University, 1200 Main Street West, Hamilton, Ontario L8N 3Z5, Canada
| | - John D. Brennan
- Chemical Biology Graduate Program, Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1, and Department of Biochemistry and Biomedical Engineering, McMaster University, 1200 Main Street West, Hamilton, Ontario L8N 3Z5, Canada
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Kitano H, Kondo Y, Saito D, Gemmei-Ide M, Morita H, Kanayama N. Binding of beta-secretase to a peptide inhibitor-carrying SAM. Colloids Surf B Biointerfaces 2010; 78:155-62. [PMID: 20338731 DOI: 10.1016/j.colsurfb.2010.02.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2010] [Revised: 02/18/2010] [Accepted: 02/18/2010] [Indexed: 11/28/2022]
Abstract
A novel disulfide, which carried a specific inhibitor for beta-secretase (KMI360) at both ends, was prepared by the coupling of 11,11'-dithiobisundecanoic acid (DTUA) with the inhibitor. The compound obtained (DTUA-KMI360) formed a self-assembled monolayer (SAM) on a gold electrode as proven by cyclic voltammetry (CV) using hydroquinone as a probe. Furthermore, DTUA-KMI360 could be accumulated as a SAM on a gold colloid deposited on a glass plate (Au colloid-glass chip) as proven by both the red-shift and the increase in absorbance of the gold colloid corresponding to localized surface plasmon resonance (LSPR). When the SAM-modified Au colloid-glass chip was immersed in a solution of aspartyl proteases, pepsin and beta-secretase, the absorbance of the chip at 550nm corresponding to LSPR of the gold colloid further increased and was slightly red-shifted, whereas coexistence of a free inhibitor obstructed these phenomena. Adsorption of the enzymes was promoted by the incorporation of a zwitterionic group into the SAM, while non-specific adsorption to the mixed SAM was significantly reduced. The optimal ratio of omega-zwitterionic alkanethiol, 3-[(6-mercaptohexyl)-N,N-dimethylamino]propane-1-sulfonic acid (C(6)-SPB), and DTUA-KMI360 in the SAM for the binding of enzymes was found to be DTUA-KMI360:C(6)-SPB=1:11 using polarization modulation infrared reflection absorption spectroscopy (PM-IR-RAS). From increasing profiles of absorbance of the Au colloid-glass chip, the association constant (K(assoc)) for pepsin with the inhibitor on the SAM was determined, whereas that for beta-secretase could not be due to the strong binding of the enzyme to the inhibitor, resulting in the absence of the dissociation process. The results suggested that the SAM of the enzyme inhibitor can be used for both investigation of enzymes and removal of target enzymes from biological fluids.
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Affiliation(s)
- Hiromi Kitano
- Department of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan.
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Ji J, Yang H, Liu Y, Chen H, Kong J, Liu B. TiO2-assisted silver enhanced biosensor for kinase activity profiling. Chem Commun (Camb) 2009:1508-10. [DOI: 10.1039/b820738k] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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25
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Wang Z, Wilkop T, Han JH, Dong Y, Linman MJ, Cheng Q. Development of Air-Stable, Supported Membrane Arrays with Photolithography for Study of Phosphoinositide−Protein Interactions Using Surface Plasmon Resonance Imaging. Anal Chem 2008; 80:6397-404. [DOI: 10.1021/ac800845w] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Zhuangzhi Wang
- Department of Chemistry, University of California, Riverside, California 92521
| | - Thomas Wilkop
- Department of Chemistry, University of California, Riverside, California 92521
| | - Jong Ho Han
- Department of Chemistry, University of California, Riverside, California 92521
| | - Yi Dong
- Department of Chemistry, University of California, Riverside, California 92521
| | - Matthew J. Linman
- Department of Chemistry, University of California, Riverside, California 92521
| | - Quan Cheng
- Department of Chemistry, University of California, Riverside, California 92521
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26
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Wang Z, Wilkop T, Xu D, Dong Y, Ma G, Cheng Q. Surface plasmon resonance imaging for affinity analysis of aptamer-protein interactions with PDMS microfluidic chips. Anal Bioanal Chem 2007; 389:819-25. [PMID: 17673982 DOI: 10.1007/s00216-007-1510-x] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2007] [Revised: 07/02/2007] [Accepted: 07/12/2007] [Indexed: 01/03/2023]
Abstract
We report on the use of PDMS multichannels for affinity studies of DNA aptamer-human Immunoglobulin E (IgE) interactions by surface plasmon resonance imaging (SPRi). The sensing surface was prepared with thiol-terminated aptamers through a self-assembling process in the PDMS channels defined on a gold substrate. Cysteamine was codeposited with the thiol aptamers to promote proper spatial arrangement of the aptamers and thus maintain their optimal binding efficiencies. Four aptamers with different nucleic acid sequences were studied to test their interaction affinity toward IgE, and the results confirmed that aptamer I (5'-SH-GGG GCA CGT TTA TCC GTC CCT CCT AGT GGC GTG CCC C-3') has the strongest binding affinity. Control experiments were conducted with a PEG-functionalized surface and IgG was used to replace IgE in order to verify the selective binding of aptamer I to the IgE molecules. A linear concentration-dependent relationship between IgE and aptamer I was obtained, and a 2-nM detection limit was achieved. SPRi data were further analyzed by global fitting, and the dissociation constant of aptamer I-IgE complex was found to be 2.7 x 10(-7) M, which agrees relatively well with the values reported in the literature. Aptamer affinity screening by SPR imaging demonstrates marked advantages over competing methods because it does not require labeling, can be used in real-time, and is potentially high-throughput. The ability to provide both qualitative and quantitative results on a multichannel chip further establishes SPRi as a powerful tool for the study of biological interactions in a multiplexed format.
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Affiliation(s)
- Zhuangzhi Wang
- Department of Chemistry, University of California, Riverside, CA 92521, USA
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Kerman K, Vestergaard M, Tamiya E. Label-Free Electrical Sensing of Small-Molecule Inhibition on Tyrosine Phosphorylation. Anal Chem 2007; 79:6881-5. [PMID: 17676818 DOI: 10.1021/ac070438i] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Protein tyrosine kinases (PTKs) play a central role in human carcinogenesis and have emerged as the promising new targets. Small-molecule inhibitors of PTKs have shown impressive anticancer effects and are rapidly entering the clinic. PTK assays allow for high-throughput identification of small-molecule inhibitors. However, current methods of detecting kinase activity require the use of radioisotopes or expensive reagents; such as fluorescently labeled antibodies. We have developed a novel label-free approach for the quantitative detection of peptide tyrosine (Tyr) phosphorylation using the electrochemical oxidation current signal of Tyr. When the phosphorylation is achieved, the phosphorylated Tyr (Tyr-P) cannot be oxidized at approximately 0.65 V. However, when the phosphorylation is successfully inhibited using a small molecule, Tyr can be oxidized and result in a high current response on a multiwalled carbon nanotube-modified screen-printed carbon electrode. We determined the activity of cellular-sarcoma (c-Src) nonreceptor PTK, p60(c-Src), in combination with its highly specific substrate peptide, Raytide. Tyr kinase reactions were also performed in the presence of a well-defined small-molecule inhibitor, 4-amino-5-(4-chlorophenyl)-7- (tert-butyl)pyrazolo[3,4-d]pyrimidine (PP2). Based on the dependency of Tyr oxidation signal on inhibitor concentration, IC50 value, half-maximal inhibition of the inhibitor, was estimated as 5 nM for PP2. Our label-free electrochemical method is a promising candidate for pharmaceutical research and development in screening small-molecule inhibitors of PTKs.
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Affiliation(s)
- Kagan Kerman
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan, Canada.
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Kerman K, Vestergaard M, Chikae M, Yamamura S, Tamiya E. Label-free electrochemical detection of the phosphorylated and non-phosphorylated forms of peptides based on tyrosine oxidation. Electrochem commun 2007. [DOI: 10.1016/j.elecom.2006.11.033] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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29
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Gold nanoparticle-based electrochemical detection of protein phosphorylation. Anal Chim Acta 2007; 588:26-33. [PMID: 17386790 DOI: 10.1016/j.aca.2007.02.001] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2006] [Revised: 01/29/2007] [Accepted: 02/01/2007] [Indexed: 11/27/2022]
Abstract
In this report, we demonstrate the application of Au nanoparticles in the electrochemical detection of protein phosphorylation. The method is based on the labeling of a specific phosphorylation event with Au nanoparticles, followed by electrochemical detection. The phosphorylation reaction is coupled with the biotinylation of the kinase substrate using a biotin-modified adenosine 5'-triphosphate [gamma]-biotinyl-3,6,9-trioxaundecanediamine (ATP) as the co-substrate. When the phosphorylated and biotinylated kinase substrate is exposed to streptavidin-coated Au nanoparticles, the high affinity between the streptavidin and biotin resulted in the attachment of Au nanoparticles on the kinase substrate. The electrochemical response obtained from Au nanoparticles enables monitoring the activity of the kinase and its substrate, as well as the inhibition of small molecule inhibitors on protein phosphorylation. We determined the activity of Src non-receptor protein tyrosine kinase, p60(c-Src) and protein kinase A in combination with their highly specific substrate peptides Raytide EL and Kemptide, respectively. The detection limits for Raytide EL and Kemptide were determined as 5 and 10 microM, (S/N=3), and the detection limits for the kinase activity of p60(c-Src) and protein kinase A (PKA) were determined as 5 and 10 U mL(-1), (S/N=3), respectively. Tyrosine kinase reactions were also performed in the presence of a well-defined inhibitor, 4-amino-5-(4-chlorophenyl)-7-(t-butyl) pyrazolo[3,4-d]pyrimidine (PP2), and its negative control molecule, 4-amino-7-phenylpyrazol[3,4-d] pyrimidine (PP3), which had no inhibition effect. Based on the dependency of Au nanoparticle signal on inhibitor concentration, IC(50) value, half-maximal inhibition of the inhibitors was estimated. IC(50) values of PP2, genistein and herbimycin A to p60(c-Src) were detected as 5 nM, 25 microM and 900 nM, respectively. The inhibition of PKA activity on Kemptide using ellagic acid was monitored with an IC(50) of 3.5 microM. The performance of the biosensor was optimized including the kinase reaction, incubation with streptavidin-coated Au nanoparticles, and the small molecule inhibitors. Kinase peptide-modified electrochemical biosensors are promising candidates for cost-effective kinase activity and inhibitor screening assays.
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30
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Kerman K, Kraatz HB. Electrochemical detection of kinase-catalyzed thiophosphorylation using gold nanoparticles. Chem Commun (Camb) 2007:5019-21. [DOI: 10.1039/b713048a] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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31
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Yang P, Whelan RJ, Mao Y, Lee AWM, Carter-Su C, Kennedy RT. Multiplexed Detection of Protein−Peptide Interaction and Inhibition Using Capillary Electrophoresis. Anal Chem 2006; 79:1690-5. [PMID: 17297974 DOI: 10.1021/ac061936e] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
High-speed capillary electrophoresis (CE) was employed to detect binding and inhibition of SH2 domain proteins using fluorescently labeled phosphopeptides as affinity probes. Single SH2 protein-phosphopeptide complexes were detected and confirmed by competition and fluorescence anisotropy. The assay was then extended to a multiplexed system involving separation of three SH2 domain proteins: Src, SH2-Bbeta, and Fyn. The selectivity of the separation was improved by altering the charge of the peptide binding partners used, thus demonstrating a convenient way to control resolution for the multiplexed assay. The separation was completed within 6 s, allowing rapidly dissociating complexes to be detected. Two low molecular weight inhibitors were tested for inhibition selectivity and efficacy. One inhibitor interrupted binding interaction of all three proteins, while the other selectively inhibited Src only leaving SH2-Bbeta and Fyn complex barely affected. IC(50) of both selective and nonselective inhibitors were determined and compared for different proteins. The IC(50) of the nonselective inhibitor was 49 +/- 9, 323 +/- 42, and 228 +/- 19 microM (n = 3) for Src, SH2-Bbeta, and Fyn, respectively, indicating different efficacy of the nonselective inhibitor for different SH2 domain protein. It is concluded that high-speed CE has the potential for multiplexed screening of drugs that disrupt protein-protein interactions.
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Affiliation(s)
- Peilin Yang
- Department of Chemistry, University of Michigan, 930 North University, Ann Arbor, Michigan 48109-1055, USA
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32
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Catimel B, Layton M, Church N, Ross J, Condron M, Faux M, Simpson RJ, Burgess AW, Nice EC. In situ phosphorylation of immobilized receptors on biosensor surfaces: application to E-cadherin/beta-catenin interactions. Anal Biochem 2006; 357:277-88. [PMID: 16945320 DOI: 10.1016/j.ab.2006.07.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2006] [Revised: 07/13/2006] [Accepted: 07/23/2006] [Indexed: 12/28/2022]
Abstract
Phosphorylation is a key posttranslational modification for modulating biological interactions. Biosensor technology is ideally suited for examining in real time the role of phosphorylation on protein-protein interactions in signaling pathways. We have developed processes for on-chip phosphorylation of immobilized receptors on biosensor surfaces. These processes have been used to analyze E-cadherin/beta-catenin interactions. Phosphorylation of the intracellular domain (ICD) of E-cadherin modulates its affinity to beta-catenin and consequently the strength of cell-cell adhesion. We have phosphorylated immobilized E-cadherin ICD in situ using casein kinase 1 (CK1), casein kinase 2 (CK2), and src. On-chip phosphorylation of E-cadherin was confirmed using anti-phosphoserine and anti-phosphotyrosine antibodies. The binding of beta-catenin to E-cadherin was analyzed quantitatively. CK1 phosphorylation of E-cadherin increased the binding affinity to beta-catenin from approximately 230 to 4 nM. A similar increase in affinity, from 260 to 4 nM, was obtained with CK2 phosphorylation of E-cadherin. However, phosphorylation by src kinase decreased the affinity constant from approximately 260 nM to 4 microM. Interestingly, phosphorylation of E-cadherin by CK1 or CK2 prevented the inhibition of beta-catenin binding by src phosphorylation.
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Affiliation(s)
- Bruno Catimel
- Ludwig Institute for Cancer Research, Royal Melbourne Hospital, Parkville, Vic. 3052, Australia
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Kitano H, Makino Y, Kawasaki H, Sumi Y. Self-Assembled Monolayer of a Pepstatin Fragment as a Sensing Element for Aspartyl Proteases. Anal Chem 2005; 77:1588-95. [PMID: 15762561 DOI: 10.1021/ac0488558] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel disulfide, which carried two pepstatin fragments at both ends, was prepared by the coupling of 11,11'-dithiobisundecanoic acid (DTUA) with a fragment (Val-Val-Sta) carrying a n-hexyl end (Pepsta(h)). The compound obtained (DTUA-Pepsta(h)) formed a self-assembled monolayer (SAM) on a gold electrode and vacuum-evaporated gold thin film as proven by cyclic voltammetry and reflection absorption infrared spectroscopy, respectively. When the SAM-modified gold electrode was incubated with a solution of aspartyl protease, pepsin, a decrease in both anodic and cathodic peak currents and an increase in potential difference were observed in the cyclic voltamogram of hydroquinone as a probe, whereas a coexistence of free pepstatin fragment inhibited these phenomena, indicating the specific binding of pepsin to the fragment at the exterior of the SAM. The binding rate of the enzyme to the SAM was largely dependent on the surface density of the fragment moiety in the SAM. Furthermore, when the SAM of DTUA-Pepsta(h) on a gold colloid array deposited on an amino group-modified glass plate was immersed in a pepsin solution, absorption of the glass plate at 550 nm corresponding to a localized surface plasmon resonance of the gold colloid abruptly increased and slightly red-shifted, and a further addition of pepstatin A gradually decreased the absorbance. From the increasing and decreasing profiles of absorbance, the association constant (K(assoc)) for pepsin with the fragment on the SAM was determined. Similar phenomena were observed upon immersion of the fragment-modified SAM in a solution of HIV-1 protease, suggesting a usability of the pepstatin fragment SAM for the detection and removal of the enzyme from biological fluids.
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Affiliation(s)
- Hiromi Kitano
- Department of Chemical and Biochemical Engineering, Toyama University, Toyama 930-8555, Japan.
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Forry SP, Murray JR, Heien MLAV, Locascio LE, Wightman RM. Probing Electric Fields Inside Microfluidic Channels during Electroosmotic Flow with Fast-Scan Cyclic Voltammetry. Anal Chem 2004; 76:4945-50. [PMID: 15373427 DOI: 10.1021/ac049591s] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fast-scan cyclic voltammetry (FSCV) at carbon-fiber microelectrodes was used in microfluidic channels. This method offers the advantage that it can resolve electroactive species not separated in the channel. In addition, this method provides a route to investigate the distribution of applied electrophoretic fields in microfluidic channels. To probe this, microelectrodes were inserted at various distances into channels and cyclic voltammograms recorded at 300 V/s were repeated at 0.1-s intervals. The use of a battery-powered laptop computer and potentiostat provided galvanic isolation between the applied electrophoretic field and the electrochemical measurements. In the absence of an external field, the peak potential for oxidation of the test solute, Ru(bpy)3(2+), was virtually unaltered by insertion of the microelectrode tip into the channel. When an electrophoretic field was applied, the peak potential for Ru(bpy)3(2+) oxidation shifted to more positive potentials in a manner that was directly proportional to the field in the channel. The shifts in peak potential observed with FSCV enabled direct compensation of the applied electrochemical potential. This approach was used to explore the electrophoretic field at the channel terminus. It was found to persist for more than 50 microm from the channel terminus. In addition, the degree of analyte dispersion was found to depend critically on the electrode position outside the channel.
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Affiliation(s)
- Samuel P Forry
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, USA
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Xavier-Filho J, Oliveira AEA, Silva LBD, Azevedo CR, Venâncio TM, Machado OLT, Oliva ML, Fernandes KVS, Xavier-Neto J. Plant insulin or glucokinin: a conflicting issue. ACTA ACUST UNITED AC 2003. [DOI: 10.1590/s1677-04202003000200002] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The presence of insulin in plants is not accepted by the scientific community in general. In this review we discuss this paradigm and retrieve information that strongly suggests that insulin is indeed found in plants. We present results, which indicate that a protein molecule with the same amino acid sequence as bovine insulin is expressed in leguminous plants. Additionally, we provide evidence that proteins associated with insulin signalling pathways in vertebrates are also found in association with insulin-like molecules in plants.
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Umezawa Y, Ozawa T, Sato M. Probing Chemical Processes in Living Cells: Applications for Assay and Screening of Chemicals that Disrupt Cellular Signaling Pathways. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2002. [DOI: 10.1246/bcsj.75.1423] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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37
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Affiliation(s)
- Thomas L Chester
- Miami Valley Laboratories, The Procter & Gamble Company, Cincinnati, Ohio 45253-8707, USA
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38
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Kitano H, Saito T, Kanayama N. Substrate Monolayers as Electrochemical Sensing Elements for α-Chymotrypsin. J Colloid Interface Sci 2002; 250:134-41. [PMID: 16290644 DOI: 10.1006/jcis.2002.8312] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2001] [Accepted: 02/21/2002] [Indexed: 11/22/2022]
Abstract
A disulfide, which carried two L-phenylalanyl p-nitroanilide (Phe-pNA) moieties at both ends, was prepared by the coupling of 11,11'-dithiodiundecanoic acid (DTUA) with Phe-pNA. The compound obtained (DTUA-Phe-pNA) formed a self-assembled monolayer (SAM) on a gold electrode and vacuum-evaporated gold thin film as proven by cyclic voltammetry, and reflection absorption spectroscopy, respectively. Incubation of alpha-chymotrypsin with the SAM-modified electrode induced both a decrease in anodic and cathodic peak currents (-DeltaIa and -DeltaIc) and an increase in potential difference (DeltaEp) in the cyclic voltammogram of potassium ferricyanide as a probe, which suggested the attack of the enzyme at the amide group between Phe and pNA groups of the SAM, resulting in the formation of an intermediate. The linear relationship between the initial rate of increase in the amount of enzyme bound to the SAM and in both DeltaIa (absolute value of the decrease in anodic peak current) and DeltaEp values was confirmed by the quartz crystal microbalance method. The binding rate of the enzyme to the Phe-pNA SAM was dependent on the surface density of the Phe-pNA group in the SAM. The alpha-chymotrypsin-induced increases in the DeltaIa and DeltaEp values were inhibited by the addition of N-acetyl-D-phenylalanine methyl ester (N-Ac-D-Phe-OMe). In contrast with alpha-chymotrypsin, trypsin did not show a significant increase in the DeltaIa and DeltaEp values upon incubation with Phe-pNA-carrying SAM. These results could be attributed to the specific attack of alpha-chymotrypsin to the amide group in the SAM. The inhibition constant for N-Ac-D-Phe-OMe in the SAM system was quite similar to that in the free substrate system, showing that the enzymatic reaction above the SAM proceeds in a similar way to that in the homogeneous solution system.
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Affiliation(s)
- Hiromi Kitano
- Department of Chemical and Biochemical Engineering, Toyama University, Toyama, 930-8555, Japan
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Umezawa Y, Ozawa T, Sato M. Methods of analysis for chemicals that promote/disrupt cellular signaling. ANAL SCI 2002; 18:503-16. [PMID: 12036116 DOI: 10.2116/analsci.18.503] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Methods of analysis were presented for chemicals that promote or disrupt cellular signaling pathways. The developed analytical methods are based not only on receptor binding, but also on the following known molecular-level processes involved in signal transduction along signaling pathways, reconstituted in vitro or taken in part in living cells. The methods were discussed in relation to receptor binding assay and/or bioassay. Examples include: (1) Insulin signaling pathways; (1-i) Chemical selectivity of agonists for insulin signaling pathways based on agonist-induced phosphorylation of a target peptide; (1-ii) An SPR-based screening method for agonist selectivity for insulin signaling pathways based on the binding of phosphotyrosine to its specific binding protein; (1-iii) A fluorescent indicator for tyrosine phosphorylation-based insulin signaling pathways; (2) An optical method for evaluating ion selectivity for calcium signaling pathways in the cell; (3) Assay and screening of chemicals that disrupt cellular signaling pathways, potential endocrine disruptors in particular; (4) Protein conformational changes, and (5) A screening method for antigen-specific IgE using mast cells, based on intracellular calcium signaling.
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Affiliation(s)
- Yoshio Umezawa
- Department of Chemistry, School of Science, The University of Tokyo, Bunkyo, Japan.
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40
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Huang M, Lai WP, Wong MS, Yang M. Effect of receptor phosphorylation on the binding between IRS-1 and IGF-1R as revealed by surface plasmon resonance biosensor. FEBS Lett 2001; 505:31-6. [PMID: 11557037 DOI: 10.1016/s0014-5793(01)02780-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A receptor binding assay based on the surface plasmon resonance (SPR) biosensor technique was developed to study the interaction between insulin-like growth factor-1 receptor (IGF-1R) and its intracellular substrate protein insulin receptor substrate-1 (IRS-1). The sensor surface was modified with anti-IGF-1R (alpha-subunit) monoclonal antibodies for the capturing of the receptor-containing membrane fragments from cell lysates. The IGF-1R was successfully immobilized on the sensor surface with binding capability for its intracellular substrates. SPR measurements showed that the tyrosine phosphorylation of IGF-1R induced by its extracellular ligand insulin-like growth factor-1 caused the receptor to bind with IRS-1 10 times faster than the unactivated receptor. As a result, the affinity constants of IRS-1 to phosphorylated and unphosphorylated IGF-1R were (8.06+/-5.18)x10(9) M(-1) and (9.81+/-4.61)x10(8) M(-1), respectively.
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Affiliation(s)
- M Huang
- Department of Biology and Chemistry, City University of Hong Kong, Kowloon, PR China
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41
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Abstract
We have compiled a comprehensive list of the articles published in the year 2000 that describe work employing commercial optical biosensors. Selected reviews of interest for the general biosensor user are highlighted. Emerging applications in areas of drug discovery, clinical support, food and environment monitoring, and cell membrane biology are emphasized. In addition, the experimental design and data processing steps necessary to achieve high-quality biosensor data are described and examples of well-performed kinetic analysis are provided.
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Affiliation(s)
- R L Rich
- Center for Biomolecular Interaction Analysis, University of Utah, Salt Lake City, UT 84132, USA
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Abstract
We report development of a method for the direct measurement of the interaction between the N-terminal arm and the remainder of the dimerization domain in the Escherichia coli AraC protein, the regulator of the l-arabinose operon. The interaction was measured using surface plasmon resonance to monitor the association between the immobilized peptide arm and the dimerization domain, truncated of its arm, in solution. As expected from genetic and physiological data, the interaction is strongly stimulated by l-arabinose and is insensitive to sugars like d-glucose or d-galactose. Alterations in the sequence of the arm which physiological experiments predict either to strengthen or weaken the arm produce the expected responses.
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Affiliation(s)
- M Ghosh
- Biology Department, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, USA
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Ross D, Johnson TJ, Locascio LE. Imaging of electroosmotic flow in plastic microchannels. Anal Chem 2001; 73:2509-15. [PMID: 11403292 DOI: 10.1021/ac001509f] [Citation(s) in RCA: 120] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have characterized electroosmotic flow in plastic microchannels using video imaging of caged fluorescent dye after it has been uncaged with a laser pulse. We studied flow in microchannels composed of a single material, poly(methyl methacrylate) (acrylic) or poly(dimethylsiloxane) (PDMS), as well as in hybrid microchannels composed of both materials. Plastic microchannels used in this study were fabricated by imprinting or molding using a micromachined silicon template as the stamping tool. We examined the dispersion of the uncaged dye in the plastic microchannels and compared it with results obtained in a fused-silica capillary. For PDMS microchannels, it was possible to achieve dispersion similar to that found in fused silica. For the acrylic and hybrid microchannels, we found increased dispersion due to the nonuniformity of surface charge density at the walls of the channels. In all cases, however, electroosmotic flow resulted in significantly less sample dispersion than pressure-driven flow at a similar velocity.
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Affiliation(s)
- D Ross
- National Institute of Standards & Technology, Gaithersburg, Maryland 20899, USA
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Zhen W, Yi C. Analysis of mono- and oligosaccharides by multiwavelength surface plasmon resonance (SPR) spectroscopy. Carbohydr Res 2001; 332:209-13. [PMID: 11434379 DOI: 10.1016/s0008-6215(01)00060-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Surface plasmon resonance (SPR) spectra of different saccharides were collected using a home-made multiwavelength SPR apparatus. Pentoses, hexoses, disaccharides and a trisaccharide were distinguished from one another according to their SPR spectra collected at the same concentration. The spectra were also used for the quantitation of sugars by exploring the linear relationship between resonance wavelength and solute concentration. The dynamic linear ranges for the determination of glucose, sucrose and raffinose are 0.01-0.2, 0.005-0.1 and 0.0025-0.1 mol/L, respectively. The SPR spectrum of a mixture of two components was investigated. While the experiments have not been carried out, the implications from this work are that the technique would be applicable to mixtures containing more than two components.
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Affiliation(s)
- W Zhen
- Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, People's Republic of China
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