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Shlyapnikov YM, Malakhova EA, Vinarov AZ, Potoldykova NV, Vladimirov VI, Zernii EY, Zamyatnin AA, Shlyapnikova EA. Cancer-Retina Antigens in the Urine of Bladder and Prostate Cancer Patients. BIOCHEMISTRY. BIOKHIMIIA 2022; 87:1268-1276. [PMID: 36509724 DOI: 10.1134/s0006297922110062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
It has recently been shown that combination of arrestin and recoverin can serve as an effective urinary biomarker for renal cell carcinoma with sensitivity and specificity of over 92%. In this work, we studied the possibility of detecting these antigens in the urine in other urological oncological diseases - bladder cancer (BC) and prostate cancer (PCa). Urine samples from 40 BC patients and 40 PCa patients were analyzed using an ultrasensitive microarray immunoassay with a detection limit of 0.1 pg/ml. It was shown that in BC the sensitivity of determining combination of arrestin with recoverin is 58% (AUC 0.76, 95% CI 0.66-0.86), while in PCa it is 60% (AUC 0.7, 95% CI 0.68-0.88). It has been established that in patients with bladder and prostate cancer who had a positive test, these antigens are not detected in 90% of cases after removal of the tumor. In the future, the obtained results could become the basis for developing new approaches for timely detection of relapses of such diseases and treatment control, as well as for the development of new diagnostic methods.
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Affiliation(s)
- Yuri M Shlyapnikov
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, 142290, Russia.
| | - Ekaterina A Malakhova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, 142290, Russia
| | - Andrey Z Vinarov
- Institute for Urology and Reproductive Health, Sechenov First Moscow State Medical University, Moscow, 119991, Russia
| | - Natalia V Potoldykova
- Institute for Urology and Reproductive Health, Sechenov First Moscow State Medical University, Moscow, 119991, Russia
| | - Vasiliy I Vladimirov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117437, Russia
| | - Evgeni Yu Zernii
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119992, Russia
| | - Andrey A Zamyatnin
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119992, Russia.,Institute of Molecular Medicine, Sechenov First Moscow State Medical University, Moscow, 119991, Russia.,Department of Biotechnology, Sirius University of Science and Technology, Krasnodar Region, Federal Territory Sirius, 354340, Russia
| | - Elena A Shlyapnikova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, 142290, Russia
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Rudenko N, Fursova K, Shepelyakovskaya A, Karatovskaya A, Brovko F. Antibodies as Biosensors' Key Components: State-of-the-Art in Russia 2020-2021. SENSORS 2021; 21:s21227614. [PMID: 34833687 PMCID: PMC8624206 DOI: 10.3390/s21227614] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 11/09/2021] [Accepted: 11/12/2021] [Indexed: 01/02/2023]
Abstract
The recognition of biomolecules is crucial in key areas such as the timely diagnosis of somatic and infectious diseases, food quality control, and environmental monitoring. This determines the need to develop highly sensitive display devices based on the achievements of modern science and technology, characterized by high selectivity, high speed, low cost, availability, and small size. Such requirements are met by biosensor systems—devices for reagent-free analysis of compounds that consist of a biologically sensitive element (receptor), a transducer, and a working solution. The diversity of biological material and methods for its immobilization on the surface or in the volume of the transducer and the use of nanotechnologies have led to the appearance of an avalanche-like number of different biosensors, which, depending on the type of biologically sensitive element, can be divided into three groups: enzyme, affinity, and cellular/tissue. Affinity biosensors are one of the rapidly developing areas in immunoassay, where the key point is to register the formation of an antigen–antibody complex. This review analyzes the latest work by Russian researchers concerning the production of molecules used in various immunoassay formats as well as new fundamental scientific data obtained as a result of their use.
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Shlyapnikov YM, Malakhova EA, Vinarov AZ, Zamyatnin AA, Shlyapnikova EA. Can new immunoassay techniques improve bladder cancer diagnostics With protein biomarkers? Front Mol Biosci 2021; 7:620687. [PMID: 33659273 PMCID: PMC7917292 DOI: 10.3389/fmolb.2020.620687] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 12/30/2020] [Indexed: 12/15/2022] Open
Abstract
The search for new diagnostic tests for cancer or ways to improve existing tests is primarily driven by the desire to identify the disease as early as possible. In this report, we summarize the current knowledge of the most promising diagnostic protein bladder cancer (BC) markers reported over the last decade. Unfortunately, analysis of published data suggests that a reliable, highly sensitive biomarker test-system based on ELISA for detecting BC has not yet been developed. The use of more sensitive assays to detect ultra-low concentrations of biomarkers not available for ELISA, could be very beneficial. Based on the literature and pilot experimental data, we conclude that a highly sensitive immunoassay using microarrays and magnetic labels, could be an effective and cheap technique suitable for the detection of diagnostically relevant BC biomarkers.
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Affiliation(s)
- Yuri M Shlyapnikov
- Institute of Theoretical and Experimental Biophysics RAS, Pushchino, Russia
| | | | - Andrey Z Vinarov
- Institute for Urology and Reproductive Health, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Andrey A Zamyatnin
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia.,Institute of Molecular Medicine, Sechenov First Moscow State Medical University, Moscow, Russia.,Department of Biotechnology, Sirius University of Science and Technology, Sochi, Russia
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Shlyapnikov YM, Malakhova EA, Shlyapnikova EA. Improving Immunoassay Performance with Cleavable Blocking of Microarrays. Anal Chem 2021; 93:1126-1134. [PMID: 33305941 DOI: 10.1021/acs.analchem.0c04175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Among the key issues that are commonly associated with the development of microarray-based assays are nonspecific binding and diffusion constraints. Here we present a novel strategy addressing both of these challenges simultaneously. The essence of the method consists in blocking the microarray surface with a blocking agent containing a perfluoroalkyl chain and a disulfide linker. The resulting surface is hydrophobic, and no immiscible liquid layer remains on it upon cyclically draining and replenishing the sample solution, ensuring an efficient mass transfer of an analyte onto a microarray. Prior to the signal detection procedure, disulfide bonds are chemically cleaved, and the perfluoroalkyl chains are removed from the microarray surface along with nonspecifically adsorbed proteins, resulting in extremely low background. Using conventional fluorescent detection, we show a 30-fold increase in signal/background ratio compared to a common epoxy-modified glass substrate. The combination of this technique with magnetic beads detection results in a simple and ultrasensitive cholera toxin (CT) immunoassay. The limit of detection (LOD) is 1 fM, which is achieved with an analyte binding time of 1 h. Efficient mass transfer provides highly sensitive detection of whole virus particles despite their low diffusion coefficient. The achieved LOD for vaccinia virus is 104 particles in 1 mL of sample. Finally, we have performed for the first time the simultaneous detection of whole virus and CT protein biomarker in a single assay. The developed technique can be used for multiplex detection of trace amounts of pathogens of various natures.
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Affiliation(s)
- Yuri M Shlyapnikov
- Institute of Theoretical and Experimental Biophysics Russian Academy of Sciences, Pushchino 142290, Russia
| | - Ekaterina A Malakhova
- Institute of Theoretical and Experimental Biophysics Russian Academy of Sciences, Pushchino 142290, Russia
| | - Elena A Shlyapnikova
- Institute of Theoretical and Experimental Biophysics Russian Academy of Sciences, Pushchino 142290, Russia
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Shlyapnikov YM, Malakhova EA, Shlyapnikova EA. Rapid Detection of Femtogram Amounts of Protein by Gel-Free Immunoblot. Bull Exp Biol Med 2020; 169:840-843. [PMID: 33098517 DOI: 10.1007/s10517-020-04988-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Indexed: 12/11/2022]
Abstract
The article presents a new method of immunoblotting for simple, rapid, and highly sensitive detection of proteins. Electrophoretic separation of sample is carried out under non-denaturing conditions in a thin conductive layer between cellulose membranes without polyacrylamide gel. The membrane surface is preliminarily modified with azidophenyl groups to photochemically immobilize proteins in situ. For visualization of protein bands, the membranes are treated with magnetic beads coated with specific antibodies, unbound particles are then removed with a magnet. The detection limit in the model system with biotinylated BSA and magnetic beads coated with streptavidin reaches 10 fg or about 105 molecules, while the total blotting time does not exceed 5 min. The method was applied for detection of IgA in a sample of human exhaled air. The method can be used for the analysis of various complex biological samples containing low amounts of the analyte.
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Affiliation(s)
- Y M Shlyapnikov
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow region, Russia.
| | - E A Malakhova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow region, Russia
| | - E A Shlyapnikova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow region, Russia
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