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Glutathione capped gold nanoclusters-based fluorescence probe for highly sensitive and selective detection of transferrin in serum. Microchem J 2022. [DOI: 10.1016/j.microc.2021.107163] [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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de Almeida SV, Cancino-Bernardi J, de Andrade JK, Felsner ML, Zucolotto V, Galli A. Cancer immunosensor based on apo and holo transferrin binding. Mikrochim Acta 2020; 187:438. [PMID: 32651709 DOI: 10.1007/s00604-020-04420-6] [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: 02/28/2020] [Accepted: 06/30/2020] [Indexed: 01/22/2023]
Abstract
An electrochemical immunosensor was developed for the determination of apo-Tf (non-iron-bound) and holo-Tf (iron-bound) using polyclonal antibody transferrin (anti-Tf) immobilized at an electrode surface as a biorecognition platform. The monitoring was based on the anti-Tf binding with both Tf forms which allows the detection of cancer cells due to the constant iron cycle and the overexpression of anti-Tf on the cancer cell surface. The immunosensor characterization was performed using electrochemical impedance spectroscopy (EIS), which evaluated the impedimetric biorecognition of the antigens-antibody by the use of K4Fe(CN)6 redox group. The immunosensor was able to detect both forms of Tf in terms of charge transfer resistance (Rct). Analytical curves showed a limit of detection of 0.049 and 0.053 ng mL-1 for apo-Tf and holo-Tf, respectively. The immunosensor was applied to the detection of the two cancer cells A549 (lung carcinoma) and MCF-7 (breast carcinoma) and compared with BHK570, a healthy cell line. The impedimetric response of healthy cells differs significantly from that of the cancerous cells, as revealed by a Dunnett's test in 95% confidence level-ca. 102 cells mL-1-indicating the feasibility of the immunosensor to discriminate both types of cells. The indirect detection of anti-Tf based on apo-Tf and holo-Tf binding can be considered an advanced approach for cancer recognition. Graphical abstract.
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Affiliation(s)
- Sthéfane Valle de Almeida
- Chemistry Department, Campus CEDETEG, State University of Midwest Paraná, Guarapuava, Brazil.,Department of Chemistry, Federal University of São Carlos, Washington Luis Road, km 235 Monjolinho, São Carlos, SP, 13565905, Brazil
| | - Juliana Cancino-Bernardi
- Nanomedicine and Nanotoxicology Group, Physics Institute of São Carlos, University of São Paulo, São Carlos, Brazil. .,Institute of Chemistry, Federal University of Alfenas, Gabriel Monteiro da Silva Street, 700 Centro, Alfenas, MG, 37130000, Brazil.
| | | | - Maria Lurdes Felsner
- Chemistry Department, Campus CEDETEG, State University of Midwest Paraná, Guarapuava, Brazil
| | - Valtencir Zucolotto
- Nanomedicine and Nanotoxicology Group, Physics Institute of São Carlos, University of São Paulo, São Carlos, Brazil
| | - Andressa Galli
- Chemistry Department, Campus CEDETEG, State University of Midwest Paraná, Guarapuava, Brazil
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Mayang Y, He X, Chen L, Zhang Y. Detection of transferrin by using a surface plasmon resonance sensor functionalized with a boronic acid monolayer. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2275-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Nowak P, Śpiewak K, Brindell M, Woźniakiewicz M, Stochel G, Kościelniak P. Separation of iron-free and iron-saturated forms of transferrin and lactoferrin via capillary electrophoresis performed in fused-silica and neutral capillaries. J Chromatogr A 2013; 1321:127-32. [PMID: 24231263 DOI: 10.1016/j.chroma.2013.10.073] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 10/21/2013] [Accepted: 10/23/2013] [Indexed: 10/26/2022]
Abstract
A capillary electrophoresis-based method for the cost-effective and high efficient separation of iron-free and iron-saturated forms of two members of transferrin family: transferrin and lactoferrin has been developed. The proposed qualitative method relying on the SDS application allowed us to separate iron-free and iron-saturated forms of these proteins, as well as human serum albumin, used as an internal standard. Owing to the distinct migration times under established conditions, the combination of transferrin and lactoferrin assays within a single analytical procedure was feasible. The performance of the method using a fused-silica capillary has been compared with the results obtained using the same method but performed with the use of a neutral capillary of the same dimensions. Neutral capillary has been used as an alternative, since the comparable resolution has been achieved with a concomitant reduction of the electroosmotic flow. Despite of this fact, the migration of analytes occurred with similar velocity but in opposite order, due to the reverse polarity application. A quantitative method employing fused-silica capillary for iron saturation study has been also developed, to evaluate the iron saturation in commercial preparations of lactoferrin.
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Affiliation(s)
- Paweł Nowak
- Jagiellonian University, Faculty of Chemistry, Department of Analytical Chemistry, Kraków, Poland
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El Deeb S, Iriban MA, Gust R. MEKC as a powerful growing analytical technique. Electrophoresis 2010; 32:166-83. [PMID: 21171121 DOI: 10.1002/elps.201000398] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Revised: 09/30/2010] [Accepted: 09/30/2010] [Indexed: 11/11/2022]
Abstract
This review summarizes the principle and the developments in MEKC in terms of separation power, sensitivity, and detection approaches more than 25 years after its appearance. Newly used surfactants are mentioned. Classical and new sample concentration techniques in MEKC are described. The different detection approaches in MEKC with advantages, limitations, and future prospects are also discussed. This review highlights the wider application of MEKC in different analytical fields. Various recent selected applications of this technique in different analytical fields are reported.
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Affiliation(s)
- Sami El Deeb
- Institute of Pharmacy, Freie Universität Berlin, Berlin, Germany
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