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Wang Z, Liu R, Fu Z, Yi X, Hu Y, Liu C, Pan D, Wu Z. A ratiometric fluorescence sensor based on gold silver nanoclusters and tungsten disulfide quantum dots with simple fabrication for the detection of copper ions in river water. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:2505-2511. [PMID: 37183758 DOI: 10.1039/d3ay00378g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Copper plays a key role in the human body; meanwhile, excess Cu2+ ions can result in various diseases. Nanoclusters (NCs) are often used to measure Cu2+ ions, but there are two difficulties. On the one hand, a single probe of NCs is easily affected by environmental factors. On the other hand, it is difficult to mask the interference of Pb2+ ions and Cd2+ ions in the process of detecting Cu2+ ions. As a new type of quantum dots (QDs), tungsten disulfide quantum dots (WS2-QDs) have some advantages of simple synthesis and stable luminescence properties. Stable WS2-QDs with blue fluorescence are used as a reference probe, while gold silver nanoclusters (AuAgNCs) with red fluorescence are used as a response probe. A ratiometric fluorescent sensor was constructed by mixing the two styles of fluorescent probes, which is abbreviated as NCs/QDs. This nano-sensor can be used to detect the concentration of Cu2+ ions, in which the fluorescence of QDs does not change significantly, while the fluorescence of NCs can be quenched by Cu2+ ions. The concentration of Cu2+ ions can be determined as low as 0.12 μM with a linear range from 0.3 to 3 μM. The common interference caused by Pb2+ and Cd2+ ions can be eliminated by the phosphate buffer solution (PBS). This sensor was used to detect the concentration of Cu2+ in river water with satisfactory results.
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Affiliation(s)
- Zhiya Wang
- Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, P. R. China.
| | - Rong Liu
- Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, P. R. China.
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P.R.China.
| | - Zhifang Fu
- Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, P. R. China.
| | - Xin Yi
- Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, P. R. China.
| | - Yongjun Hu
- Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, P. R. China.
| | - Changhui Liu
- Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, P. R. China.
| | - Dong Pan
- Zhejiang Addenda Advance Energy Material Co. Ltd, Huzhou 313000, P. R. China
| | - Zhaoyang Wu
- 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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Manring N, Ahmed MMN, Smeltz JL, Pathirathna P. Electrodeposition of dopamine onto carbon fiber microelectrodes to enhance the detection of Cu 2+ via fast-scan cyclic voltammetry. Anal Bioanal Chem 2023:10.1007/s00216-022-04488-4. [PMID: 36595035 DOI: 10.1007/s00216-022-04488-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/09/2022] [Accepted: 12/13/2022] [Indexed: 01/04/2023]
Abstract
The etiology of neurodegenerative diseases is poorly understood; however, studies have shown that heavy metals, such as copper, play a critical role in neurotoxicity, thus, adversely affecting the development of these diseases. Because of the limitations associated with classical metal detection tools to obtain accurate speciation information of ultra-low concentrations of heavy metals in the brain, analysis is primarily performed in blood, urine, or postmortem tissues, limiting the translatability of acquired knowledge to living systems. Inadequate and less accurate data obtained with such techniques provide little or no information for developing efficient therapeutics that aid in slowing down the deterioration of brain cells. In this study, we developed a biocompatible, ultra-fast, low-cost, and robust surface-modified electrode with carbon fibers by electrodepositing dopamine via fast-scan cyclic voltammetry (FSCV) to detect Cu2+ in modified tris buffer. We studied the surface morphology of our newly introduced sensors using high-resolution images by atomic force microscopy under different deposition conditions. The limit of detection (LOD) of our surface-modified sensor was 0.01 µM (0.64 ppb), and the sensitivity was 11.28 nA/µM. The LOD and sensitivity are fifty and two times greater, respectively, compared to those of a bare electrode. The sensor's response is not affected by the presence of dopamine in the matrix. It also exhibited excellent stability to multiple subsequent injections and repeated measurements of Cu2+ over a month, thus showing its strength to be developed into an accurate, fast, robust electrochemical tool to monitor ultra-low concentrations of heavy metals in the brain in real time.
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Affiliation(s)
- Noel Manring
- Department of Biomedical & Chemical Engineering & Sciences, Florida Institute of Technology, 150 W. University Blvd, Melbourne, FL, 32901, USA
| | - Muzammil M N Ahmed
- Department of Biomedical & Chemical Engineering & Sciences, Florida Institute of Technology, 150 W. University Blvd, Melbourne, FL, 32901, USA
| | - Jessica L Smeltz
- Department of Biomedical & Chemical Engineering & Sciences, Florida Institute of Technology, 150 W. University Blvd, Melbourne, FL, 32901, USA
| | - Pavithra Pathirathna
- Department of Biomedical & Chemical Engineering & Sciences, Florida Institute of Technology, 150 W. University Blvd, Melbourne, FL, 32901, USA.
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Whitty-Léveillé L, VanAernum ZL, Pavon JA, Murphy C, Neal K, Forest W, Gao X, Zhong W, Richardson DD, Schuessler HA. Determination of ultra-trace metal-protein interactions in co-formulated monoclonal antibody drug product by SEC-ICP-MS. MAbs 2023; 15:2199466. [PMID: 37032437 PMCID: PMC10085571 DOI: 10.1080/19420862.2023.2199466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2023] Open
Abstract
Transition metals can be introduced in therapeutic protein drugs at various steps of the manufacturing process (e.g. manufacturing raw materials, formulation, storage), and can cause a variety of modifications on the protein. These modifications can potentially influence the efficacy, safety, and stability of the therapeutic protein, especially if critical quality attributes (CQAs) are affected. Therefore, it is meaningful to understand the interactions between proteins and metals that can occur during the manufacturing process, formulation, and storage of biotherapeutics. Here, we describe a novel strategy to differentiate between ultra-trace levels of transition metals (cobalt, chromium, copper, iron, and nickel) interacting with therapeutic proteins and free metal in solution in the drug formulation using size exclusion chromatography coupled to inductively coupled plasma mass spectrometry (SEC-ICP-MS). Two monoclonal antibodies (mAbs) were coformulated and stored up to nine days in a scaled down model to mimic metal exposure from manufacturing tanks. The samples containing the mAbs were first analyzed by ICP-MS for bulk metal analysis, then studied using SEC-ICP-MS to measure the extent of metal-protein interactions. The SEC separation was used to differentiate metal associated with the mAbs from free metal in solution. Relative quantitation of metal-protein interaction was then calculated using the relative peak areas of protein-associated metal to free metal in solution and weighting it to the total metal concentration in the mixture as measured by bulk metal analysis by ICP-MS. The SEC-ICP-MS method offers an informative means of measuring metal-protein interactions during drug development.
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Affiliation(s)
| | | | | | - Christa Murphy
- Analytical Research and Development, Merck & Co, Inc, Rahway, New Jersey
| | - Katie Neal
- Analytical Research and Development, Merck & Co, Inc, Rahway, New Jersey
| | - William Forest
- Analytical Research and Development, Merck & Co, Inc, Rahway, New Jersey
| | - Xinliu Gao
- Analytical Research and Development, Merck & Co, Inc, Rahway, New Jersey
| | - Wendy Zhong
- Analytical Research and Development, Merck & Co, Inc, Rahway, New Jersey
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In situ simultaneous quantitative analysis multi-elements of archaeological ceramics via laser-induced breakdown spectroscopy combined with machine learning strategy. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Kiwi juice stabilized gold nanoclusters for fluorescence turn-on detection of copper ions. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1016/j.cjac.2022.100191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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A highly sensitive and selective sensor for trace uranyl (VI) ion based on a graphene-coated carbon paste electrode modified with ion imprinted polymer. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104767] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Moein MM, Halldin C. Sample preparation techniques for protein binding measurement in radiopharmaceutical approaches: A short review. Talanta 2020; 219:121220. [PMID: 32887121 DOI: 10.1016/j.talanta.2020.121220] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/21/2020] [Accepted: 05/25/2020] [Indexed: 10/24/2022]
Abstract
Plasma protein binding (PPB) measurement is a key step in radiopharmaceutical studies for the development of positron emission tomography (PET) radioligands. PPB refers to the binding degree of a radioligand, radiotracer, or drug to blood plasma proteins or tissues after administration into the body. Several techniques have been successfully developed and applied for PPB measurement of PET radioligands. However, there is room for progress among these techniques in relation to duration time, adaptability with nonpolar radioligands, in vivo measurement, specificity, and selectivity. This mini review gives a brief overview of advances, limitations, and prospective applications of commercially-available PPB methods.
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Affiliation(s)
- Mohammad Mahdi Moein
- Karolinska Radiopharmacy, Karolinska University Hospital, S-171 64 Stockholm, Sweden; Karolinska Institutet, Department of Oncology-Pathology, J5:20, S-171 77 Stockholm, Sweden.
| | - Christer Halldin
- Department of Clinical Neuroscience, Center for Psychiatry Research, Karolinska Institutet and Stockholm County Council, SE-171 76 Stockholm, Sweden
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