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Wan J, Li S, Ma Y, Hu Q, Liang Y, Liang Z, Feng W, Tian Y, Hong M, Ye Z, Han D, Niu L. Boronate crosslinking-based ratiometric electrochemical assay of glycated albumin. Talanta 2024; 274:125990. [PMID: 38552477 DOI: 10.1016/j.talanta.2024.125990] [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: 02/01/2024] [Revised: 03/20/2024] [Accepted: 03/23/2024] [Indexed: 05/04/2024]
Abstract
As a product of nonenzymatic glycation, glycated albumin (GA) is a promising serum marker for the short-term glycemic monitoring in patients with diabetes. On the basis of the boronate crosslinking (BCL)-enabled direct labeling of ferrocene (Fc) tags to the nonenzymatically glycated (NEG) sites, we report herein a novel aptamer-based ratiometric electrochemical (apt-REC) platform for the point-of-care (POC) assay of GA. This apt-REC platform is based on the recognition of GA proteins by the methylene blue (MB)-modified aptamer receptors and the labeling of the Fc tags to the NEG sites via the BCL. Using MB as the reference tag and Fc as the quantification tag, the ratio of the oxidation currents (i.e., IFc/IMB) can serve as the yardstick for the ratiometric assay of GA. Due to the presence of tens of the NEG sites, each GA protein can be labeled with tens of quantification tags, permitting the amplified assay in a simple, time-saving, and low-cost manner. The ratiometric signal exhibited a good linear response over the range from 0.1 to 100 μg/mL, with a detection limit of 45.5 ng/mL. In addition to the superior reproducibility and robustness, this apt-REC platform is highly selective (capable of discriminating GA against human serum albumin (HSA)) and applicable to GA assay in serum samples. Due to its low cost, high reproducibility and robustness, simple operation, and high sensitivity and selectivity, this apt-REC platform holds great promise in the POC assay of GA for diabetes management.
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Affiliation(s)
- Jianwen Wan
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China
| | - Shiqi Li
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China
| | - Yingming Ma
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China
| | - Qiong Hu
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China; School of Chemistry and Chemical Engineering, Anshun University, Anshun, 561000, PR China.
| | - Yiyi Liang
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China
| | - Zhiwen Liang
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China
| | - Wenxing Feng
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China
| | - Yiyan Tian
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China
| | - Mingru Hong
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China
| | - Zhuojun Ye
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China
| | - Dongxue Han
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China
| | - Li Niu
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China; School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, PR China.
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2
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Rescalli A, Varoni EM, Cellesi F, Cerveri P. Analytical Challenges in Diabetes Management: Towards Glycated Albumin Point-of-Care Detection. BIOSENSORS 2022; 12:bios12090687. [PMID: 36140073 PMCID: PMC9496022 DOI: 10.3390/bios12090687] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/20/2022] [Accepted: 08/23/2022] [Indexed: 11/16/2022]
Abstract
Diabetes mellitus is a worldwide-spread chronic metabolic disease that occurs when the pancreas fails to produce enough insulin levels or when the body fails to effectively use the secreted pancreatic insulin, eventually resulting in hyperglycemia. Systematic glycemic control is the only procedure at our disposal to prevent diabetes long-term complications such as cardiovascular disorders, kidney diseases, nephropathy, neuropathy, and retinopathy. Glycated albumin (GA) has recently gained more and more attention as a control biomarker thanks to its shorter lifespan and wider reliability compared to glycated hemoglobin (HbA1c), currently the “gold standard” for diabetes screening and monitoring in clinics. Various techniques such as ion exchange, liquid or affinity-based chromatography and immunoassay can be employed to accurately measure GA levels in serum samples; nevertheless, due to the cost of the lab equipment and complexity of the procedures, these methods are not commonly available at clinical sites and are not suitable to home monitoring. The present review describes the most up-to-date advances in the field of glycemic control biomarkers, exploring in particular the GA with a special focus on the recent experimental analysis techniques, using enzymatic and affinity methods. Finally, analysis steps and fundamental reading technologies are integrated into a processing pipeline, paving the way for future point-of-care testing (POCT). In this view, we highlight how this setup might be employed outside a laboratory environment to reduce the time from measurement to clinical decision, and to provide diabetic patients with a brand-new set of tools for glycemic self-monitoring.
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Affiliation(s)
- Andrea Rescalli
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milan, Italy
- Correspondence: (A.R.); (E.M.V.)
| | - Elena Maria Varoni
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, 20122 Milan, Italy
- Correspondence: (A.R.); (E.M.V.)
| | - Francesco Cellesi
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, 20133 Milan, Italy
| | - Pietro Cerveri
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milan, Italy
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3
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Sun D, Xie J, Chen CJ, Liu JT. Analyzation of the binding mechanism and the isoelectric point of glycated albumin with self-assembled, aptamer-conjugated films by using surface plasmon resonance. Colloids Surf B Biointerfaces 2022; 214:112445. [PMID: 35290823 DOI: 10.1016/j.colsurfb.2022.112445] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 02/24/2022] [Accepted: 03/03/2022] [Indexed: 10/18/2022]
Abstract
Glycated albumin(GA), a biomarker which has great potential to replace glycated hemoglobin in the diagnosis and treatment of diabetes, is being extensively studied by scientists, especially in preventive medicine. Aptamers, as novel probes, have attracted much attention due to their high specificity, wide storage conditions, and simple preparation. However, the interaction mechanism between GA and its aptamer is still unclear, hindering the progress of diabetic aptamer sensors into clinical testing. In this study, the interaction mechanism between GA and its aptamer was evaluated for the first time using surface plasmon resonance by changing the pH value, salt concentration and temperature. The successful preparation of the sensor chip is proved by the water contact angle, Atomic Force Microscope, and the X-ray photoelectron spectroscopy. This study shows that the pH can greatly affect the formation of a complex from the interaction between the aptamer and GA. The interaction mechanism between GA aptamer and GA was caused by electrostatic force. Otherwise, this is the first time to detect protein isoelectric point (pI) using SPR. This study provides an important reference for researchers of aptamer sensors from the perspective of detection environment, and promotes the use of aptamer sensors to the clinic.
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Affiliation(s)
- Dapeng Sun
- Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China; University of Chinese Academy of Sciences, No.19 A Yuquan Road, Beijing 100049, China; Research Center for Materials Science and Opti-Electronic Technology, College of Materials Science and Opti-Electronic Technology, University of Chinese Academy of Sciences, No.19 A Yuquan Road, Beijing 100049, China
| | - Jing Xie
- Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China; University of Chinese Academy of Sciences, No.19 A Yuquan Road, Beijing 100049, China
| | - Ching-Jung Chen
- University of Chinese Academy of Sciences, No.19 A Yuquan Road, Beijing 100049, China; School of Opto-Electronic Technology, University of Chinese Academy of Sciences, China.
| | - Jen-Tsai Liu
- University of Chinese Academy of Sciences, No.19 A Yuquan Road, Beijing 100049, China; Research Center for Materials Science and Opti-Electronic Technology, College of Materials Science and Opti-Electronic Technology, University of Chinese Academy of Sciences, No.19 A Yuquan Road, Beijing 100049, China.
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4
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Li Z, Zhang J, Dai G, Luo F, Chu Z, Geng X, He P, Zhang F, Wang Q. A ratiometric electrochemical biosensor for glycated albumin detection based on enhanced nanozyme catalysis of cuprous oxide-modified reduced graphene oxide nanocomposites. J Mater Chem B 2021; 9:9324-9332. [PMID: 34710204 DOI: 10.1039/d1tb01912k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanozymes have enzyme-like characteristics and nanozyme-based electrochemical sensors have been widely studied for biomarker detection. In this work, cuprous oxide-modified reduced graphene oxide (Cu2O-rGO) nanozyme was prepared by simultaneous reduction of copper chloride and graphene oxide. This Cu2O-rGO nanozyme displayed an outstanding electrocatalytic activity to glucose oxidation and was used as the modified material of a glassy carbon electrode to fabricate an electrochemical ratiometric biosensor for glycated albumin (GA) detection. In this ratiometric biosensor, methylene blue-labeled DNA tripods (MB-tDNA) were adsorbed on the Cu2O-rGO/GCE surface to form a bioinspired electrode (MB-tDNA/Cu2O-rGO/GCE), in which the catalytic sites of Cu2O-rGO were covered by MB-tDNA. In the presence of target GA, GA could be identified by the aptamer sequence contained in MB-tDNA, and a MB-tDNA/GA complex was formed and released into the solution, so the reduced current of MB-tDNA was decreased. Simultaneously, the oxidized current of the outer added glucose was increased since more catalytic sites of Cu2O-rGO nanozyme on the substrate electrode surface were exposed. The ratio of the peak currents of glucose oxidation and methylene blue reduction (IGlu/IMB) was used to monitor the GA level and ultimately improve the accuracy of the method. The electrochemical sensor showed a low detection limit of 0.007 μg mL-1 and a wide linear range from 0.02 to 1500 μg mL-1. The proposed sensor was also successfully used to measure the GA expression level in the blood serum of a diabetic mouse model.
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Affiliation(s)
- Zhi Li
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China.
| | - Jingwen Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China.
| | - Ge Dai
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China.
| | - Feifei Luo
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China.
| | - Zhaohui Chu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China.
| | - Xing Geng
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China.
| | - Pingang He
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China.
| | - Fan Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China.
| | - Qingjiang Wang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China.
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5
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Ki H, Oh J, Han GR, Kim MG. Glycation ratio determination through simultaneous detection of human serum albumin and glycated albumin on an advanced lateral flow immunoassay sensor. LAB ON A CHIP 2020; 20:844-851. [PMID: 31984402 DOI: 10.1039/c9lc00967a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Glycated albumin synthesized in a non-enzymatic reaction with high glucose levels in human plasma is a long-term biomarker for understanding average glucose levels over the past few weeks. Glycated albumin level determination requires an enzymatic assay involving an expensive, complicated, and laborious process, including the specific hydrolysis of albumin and the oxidation of glycated amino acids. In this study, we developed two advanced lateral flow immunoassays (LFIAs) for the simultaneous determination of total human serum albumin and glycated albumin concentrations using a colorimetric signal. Additionally, through a sequential reaction on our advanced LFIA, the selectivity of glycated albumin was improved. We quantified both HSA and GA with wide detection ranges of 1 ng mL-1-1 mg mL-1 and 0.5 μg mL-1-3.6 mg mL-1, respectively. Various serum samples with different glycation ratios were analyzed using this sensor and demonstrated a reasonable recovery range. This indicated that our platform could directly determinate the glycation ratio of various samples, and therefore, be applicable in point-of-care glucose status monitoring.
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Affiliation(s)
- Hangil Ki
- Department of Chemistry, School of Physics and Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of Korea.
| | - Jusung Oh
- Department of Chemistry, School of Physics and Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of Korea.
| | - Gyeo-Re Han
- Department of Chemistry, School of Physics and Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of Korea.
| | - Min-Gon Kim
- Department of Chemistry, School of Physics and Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of Korea.
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6
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Ghosh S, Datta D, Cheema M, Dutta M, Stroscio MA. Aptasensor based optical detection of glycated albumin for diabetes mellitus diagnosis. NANOTECHNOLOGY 2017; 28:435505. [PMID: 28853715 DOI: 10.1088/1361-6528/aa893a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Glycated albumin (GA) has been reported as an important biomarker for diabetes mellitus. This study investigates an optical sensor comprised of deoxyribonucleic acid (DNA) aptamer, semiconductor quantum dot and gold (Au) nanoparticle for the detection of GA. The system functions as a 'turn on' sensor because an increase in photoluminescence intensity is observed upon the addition of GA to the sensor. This is possibly because of the structure of the DNA aptamer, which folds to form a large hairpin loop before the addition of the analyte and is assumed to open up after the addition of target to the sensor in order to bind to GA. This pushes the quantum dot and the Au nanoparticle away causing an increase in photoluminescence. A linear increase in photoluminescence intensity and quenching efficiency of the sensor is observed as the GA concentration is varied between 0-14 500 nM. Time based photoluminescence studies with the sensor show the decrease in binding rate of the aptamer to the target within a specific time period. The sensor was found to have a higher selectivity towards GA than other control proteins. Further investigation of this simple sensor with greater number of clinical samples can open up avenues for an efficient diagnosis and monitoring of diabetes mellitus when used in conjunction with the traditional method of glucose level monitoring.
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Affiliation(s)
- Shreya Ghosh
- Department of Bioengineering, University of Illinois at Chicago, 851 South Morgan Street (SEO 218), Chicago, IL 60607, United States of America
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7
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Inoue Y, Inoue M, Saito M, Yoshikawa H, Tamiya E. Sensitive Detection of Glycated Albumin in Human Serum Albumin Using Electrochemiluminescence. Anal Chem 2017; 89:5909-5915. [DOI: 10.1021/acs.analchem.7b00280] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuki Inoue
- Department
of Applied Physics, Graduate School of Engineering, Osaka University, 2-1,
Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Mikako Inoue
- Department
of Pharmacology and Toxicology, Faculty of Arts and Sciences, University of Toronto, 27 King’s College Circle, Toronto, Ontario M5S 1A1, Canada
| | - Masato Saito
- Department
of Applied Physics, Graduate School of Engineering, Osaka University, 2-1,
Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiroyuki Yoshikawa
- Department
of Applied Physics, Graduate School of Engineering, Osaka University, 2-1,
Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Eiichi Tamiya
- Department
of Applied Physics, Graduate School of Engineering, Osaka University, 2-1,
Yamadaoka, Suita, Osaka 565-0871, Japan
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8
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Boonyasit Y, Chailapakul O, Laiwattanapaisal W. A multiplexed three-dimensional paper-based electrochemical impedance device for simultaneous label-free affinity sensing of total and glycated haemoglobin: The potential of using a specific single-frequency value for analysis. Anal Chim Acta 2016; 936:1-11. [DOI: 10.1016/j.aca.2016.05.047] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 05/30/2016] [Accepted: 05/31/2016] [Indexed: 11/26/2022]
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9
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Kameya M, Tsugawa W, Yamada-Tajima M, Hatada M, Suzuki K, Sakaguchi-Mikami A, Ferri S, Klonoff DC, Sode K. Electrochemical sensing system employing fructosamine 6-kinase enables glycated albumin measurement requiring no proteolytic digestion. Biotechnol J 2016; 11:797-804. [DOI: 10.1002/biot.201500442] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 02/25/2016] [Accepted: 04/06/2016] [Indexed: 01/13/2023]
Affiliation(s)
- Miho Kameya
- Department of Biotechnology and Life Science, Graduate School of Engineering; Tokyo University of Agriculture and Technology; Tokyo Japan
| | - Wakako Tsugawa
- Department of Biotechnology and Life Science, Graduate School of Engineering; Tokyo University of Agriculture and Technology; Tokyo Japan
| | - Mayumi Yamada-Tajima
- Department of Biotechnology and Life Science, Graduate School of Engineering; Tokyo University of Agriculture and Technology; Tokyo Japan
| | - Mika Hatada
- Department of Biotechnology and Life Science, Graduate School of Engineering; Tokyo University of Agriculture and Technology; Tokyo Japan
| | - Keita Suzuki
- Department of Biotechnology and Life Science, Graduate School of Engineering; Tokyo University of Agriculture and Technology; Tokyo Japan
| | - Akane Sakaguchi-Mikami
- D epartment of Medical Technology, School of Health Sciences, Graduate School of Bionics, Computer and Media Sciences; Tokyo University of Technology; Tokyo Japan
| | - Stefano Ferri
- Department of Engineering, Graduate School of Integrated Science and Technology; Shizuoka University; Tokyo Japan
| | - David C. Klonoff
- Diabetes Research Institute; Mills-Peninsula Health Services; San Mateo California USA
| | - Koji Sode
- Department of Biotechnology and Life Science, Graduate School of Engineering; Tokyo University of Agriculture and Technology; Tokyo Japan
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10
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A microfluidic paper-based analytical device for the assay of albumin-corrected fructosamine values from whole blood samples. Bioanalysis 2015; 7:79-90. [PMID: 25558937 DOI: 10.4155/bio.14.199] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND A method for acquiring albumin-corrected fructosamine values from whole blood using a microfluidic paper-based analytical system that offers substantial improvement over previous methods is proposed. RESULTS The time required to quantify both serum albumin and fructosamine is shortened to 10 min with detection limits of 0.50 g dl(-1) and 0.58 mM, respectively (S/N = 3). The proposed system also exhibited good within-run and run-to-run reproducibility. The results of the interference study revealed that the acceptable recoveries ranged from 95.1 to 106.2%. The system was compared with currently used large-scale methods (n = 15), and the results demonstrated good agreement among the techniques. CONCLUSION The microfluidic paper-based system has the potential to continuously monitor glycemic levels in low resource settings.
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11
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12
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Construction of engineered fructosyl peptidyl oxidase for enzyme sensor applications under normal atmospheric conditions. Biotechnol Lett 2011; 34:491-7. [PMID: 22052257 DOI: 10.1007/s10529-011-0787-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Accepted: 10/21/2011] [Indexed: 10/15/2022]
Abstract
Current enzymatic methods for the analysis of glycated proteins use flavoenzymes that catalyze the oxidative deglycation of fructosyl peptides, designated as fructosyl peptidyl oxidases (FPOXs). However, as FPOXs are oxidases, the signals derived from electron mediator-type electrochemical monitoring based on them are affected by dissolved O(2). Improvement of dye-mediated dehydrogenase activity of FPOXs and its application to enzyme electrode construction were therefore undertaken. Saturation mutagenesis study on Asn56 of FPOX from Phaeosphaeria nodorum, produced mutants with marked decreases in the catalytic ability to employ O(2) as the electron acceptor, while showing higher dye-mediated dehydrogenase activity employing artificial electron acceptors than the parental enzyme. Thus constructed virtually fructosyl peptide dehydrogenase, Asn56Ala, was then applied to produce an enzyme electrode for the measurement of fructosyl-(α) N-valyl-histidine (f-(α)Val-His), the protease-digested product of HbA1c. The enzyme electrode could measure f-(α)Val-His in the physiological target range in air.
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13
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Ma XJ, Pan JM, Bao YQ, Zhou J, Tang JL, Li Q, Xiang KS, Jia WP. Combined assessment of glycated albumin and fasting plasma glucose improves the detection of diabetes in Chinese subjects. Clin Exp Pharmacol Physiol 2011; 37:974-9. [PMID: 20557319 DOI: 10.1111/j.1440-1681.2010.05417.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
1. The aim of the present study was to assess the validity of glycated albumin (GA) and fasting plasma glucose (FPG) as a screening tool for the early detection of diabetes in Chinese subjects. 2. A total of 1971 outpatient subjects underwent a 75 g oral glucose tolerance test (OGTT) and GA measurement. The receiver operating characteristic curve (ROC) was plotted to examine the sensitivity, specificity, and positive and negative predictive values of GA and FPG in detecting undiagnosed diabetes at the different cut-off levels. 3. The prevalence of impaired glucose regulation and diabetes was 27.40% and 38.30%. For these diabetic individuals, 4.64% had isolated fasting hyperglycemia, 50.86% had isolated postprandial hyperglycemia and 44.50% had both. Using ROC analysis, a GA of 17.1% gave an optimal sensitivity of 76.82% (95% confidence interval: 73.64-79.79%) and specificity of 76.89% (74.42-79.23%) for the diagnosis of diabetes. Likewise, a FPG of 6.1 mmol/L gave an optimal sensitivity of 80.93% (77.94-83.67%) and specificity of 85.94% (83.86-87.84%). If subjects met both criteria, they were regarded as having diabetes; the positive predictive value of the combined criteria, FPG ≥ 6.1 mmol/L and GA ≥ 17.1%, was relatively high (84.79% (81.62-87.60%)), and this would have avoided 76% of the OGTT in our survey. 4. In conclusion, a GA value of 17.1%, an optimal cut-off in Chinese subjects, identified a high proportion of potential diabetic individuals. Simultaneous measurement of FPG and GA would enhance the sensitivity of diabetes screening in our population and avoid 76% of OGTT.
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Affiliation(s)
- Xiao-Jing Ma
- Department of Endocrinology and Metabolism, Shanghai Clinical Center for Diabetes, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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14
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Chen JK, Li JY. Synthesis of tethered poly(N-isopropylacrylamide) for detection of breast cancer recurrence DNA. J Colloid Interface Sci 2011; 358:454-61. [PMID: 21481404 DOI: 10.1016/j.jcis.2011.03.063] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Revised: 03/16/2011] [Accepted: 03/16/2011] [Indexed: 10/18/2022]
Abstract
We have grafted temperature-responsive tethered poly(N-isopropylacrylamide) (PNIPAAm) onto silicon surfaces through atom transfer radical polymerization (ATRP) as a medium to extract human genomic DNA molecules from a biological specimen, namely human blood incorporating target DNA (hgDNA584) and control DNA (hgDNA528) at concentrations of 0.5, 1, and 50 ng μL(-1). The variable adhesion forces of the tethered PNIPAAm brushes on the surfaces were used to capture and release DNA molecules through changes in temperature. After amplifying the signal of the hgDNA584 and hgDNA528 strands released from the tethered PNIPAAm on the substrate using the polymerase chain reaction (PCR), we identified these DNA macromolecules using agarose gel electrophoresis. The accuracy of the detection of hgDNA584 and hgDNA528 was controlled through the design of specific primers in the PCR process. The quantities of these two DNA molecules obtained through the capture and release from tethered PNIPAAm brushes under temperature tuning conditions were sufficient for them to be amplified recognizably, suggesting that this approach could be used in miniaturized lab-on-a-chip cartridges for rapid disease diagnosis.
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Affiliation(s)
- Jem-Kun Chen
- Department of Polymer Engineering, National Taiwan University of Science and Technology, 43, Section 4, Keelung Road, Taipei 106, Taiwan, ROC.
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15
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Aguilera-Herrador E, Cruz-Vera M, Valcárcel M. Analytical connotations of point-of-care testing. Analyst 2010; 135:2220-32. [DOI: 10.1039/c0an00307g] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Roohk HV, Zaidi AR. A review of glycated albumin as an intermediate glycation index for controlling diabetes. J Diabetes Sci Technol 2008; 2:1114-21. [PMID: 19885300 PMCID: PMC2769832 DOI: 10.1177/193229680800200620] [Citation(s) in RCA: 121] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
INTRODUCTION This article reviews glycated albumin (GA) as a potential intermediate-term glycation index to fill the gap between self-monitoring of blood glucose (SMBG) and hemoglobin A1c testing in diabetes management. The introduction gives an assessment of available short-, medium-, and long-term glycemic indicators. METHODOLOGIES AND UTILITY: Methods of GA measurement are summarized, and the variance of normal and diabetic GA values are discussed. Greatest uniformity in GA measurement is generally associated with immunoassay and the newer affinity chromatography methodologies utilized by reference laboratories. Utility of GA measurement includes its value as a marker for glycation, its substantial relationship to diabetes complications such as nephropathy and coronary artery disease, and as an unambiguous indicator of glycemic control in diabetes patients undergoing hemodialysis. Studies support the utility of GA in detecting short-term changes in glycemic control, and GA testing has been strongly recommended for gestational diabetes. RESULTS AND DISCUSSION The results of a survey with mailings to over 3500 diabetes care professionals primarily in the United States are outlined and analyzed (margin of error: +/-6.5%, 95% confidence). Respondents strongly supported the need for a test for intermediate glycemic control as well as the utility of a rapid GA test as a monthly glycemic indicator. CONCLUSIONS Such a test, as yet unavailable, could increase compliance and enhance empowerment among diabetes patients. It also has the potential to reduce the number of recommended SMBG tests, which may result in significant health care cost savings.
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Affiliation(s)
- H Vernon Roohk
- Department of Surgery, University of California Irvine, Irvine, California 92683, USA.
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Paroni R, Ceriotti F, Galanello R, Battista Leoni G, Panico A, Scurati E, Paleari R, Chemello L, Quaino V, Scaldaferri L, Lapolla A, Mosca A. Performance characteristics and clinical utility of an enzymatic method for the measurement of glycated albumin in plasma. Clin Biochem 2007; 40:1398-405. [DOI: 10.1016/j.clinbiochem.2007.08.001] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2007] [Revised: 07/26/2007] [Accepted: 08/03/2007] [Indexed: 10/23/2022]
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Ito H, Takayanagi K, Okochi M, Shikida M, Sato K, Honda H. Proposal of Pumpless, Valveless, and Flowless Miniaturized Reactor Using Magnetic Beads for the Portable Analysis Device. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2006. [DOI: 10.1252/jcej.39.1296] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hiroshi Ito
- Department of Biotechnology, Graduate School of Engineering, Nagoya University
| | - Kentaro Takayanagi
- Department of Micro-Nano System Engineering, Graduate School of Engineering, Nagoya University
| | - Mina Okochi
- Department of Biotechnology, Graduate School of Engineering, Nagoya University
| | | | - Kazuo Sato
- Department of Micro-Nano System Engineering, Graduate School of Engineering, Nagoya University
| | - Hiroyuki Honda
- Department of Biotechnology, Graduate School of Engineering, Nagoya University
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