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Popov S, Paderin N, Chistiakova E, Sokolova A, Konyshev IV, Belozerov VS, Byvalov AA. Swelling, Protein Adsorption, and Biocompatibility of Pectin-Chitosan Hydrogels. Gels 2024; 10:472. [PMID: 39057495 PMCID: PMC11275652 DOI: 10.3390/gels10070472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2024] [Revised: 07/11/2024] [Accepted: 07/16/2024] [Indexed: 07/28/2024] Open
Abstract
The study aims to determine how chitosan impacts pectin hydrogel's ability to attach peritoneal leukocytes, activate complement, induce hemolysis, and adsorb blood proteins. The hydrogels PEC-Chi0, PEC-Chi25, PEC-Chi50, and PEC-Chi75 were prepared by placing a mixture solution of 4% pectin and 4% chitosan in a ratio of 4:0, 3:1, 2:2, and 1:3 in a solution of 1.0 M CaCl2. Chitosan was found to modify the mechanical properties of pectin-calcium hydrogels, such as hardness and cohesiveness-to-adhesiveness ratio. Chitosan in the pectin-calcium hydrogel caused pH-sensitive swelling in Hanks' solution. The PEC-Chi75 hydrogel was shown to adsorb serum proteins at pH 7.4 to a greater extent than other hydrogels. PEC-Chi75's strong adsorption capacity was related to lower peritoneal leukocyte adherence to its surface when compared to other hydrogels, showing improved biocompatibility. Using the optical tweezers approach, it was shown that the force of interaction between pectin-chitosan hydrogels and plasma proteins increased from 10 to 24 pN with increasing chitosan content from 0 to 75%. Thus, the properties of pectin-calcium hydrogel, which determine interactions with body tissues after implantation, are improved by the addition of chitosan, making pectin-chitosan hydrogel a promising candidate for smart biomaterial development.
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Affiliation(s)
- Sergey Popov
- Institute of Physiology of Federal Research Centre “Komi Science Centre of the Urals Branch of the Russian Academy of Sciences”, 50 Pervomaiskaya Str., 167982 Syktyvkar, Russia; (N.P.); (E.C.); (A.S.); (I.V.K.); (V.S.B.); (A.A.B.)
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Byvalov A, Konyshev I, Ananchenko B, Belozerov V. Force spectroscopy of interactions between Yersinia pseudotuberculosis and Yersinia pestis cells and monoclonal antibodies using optical tweezers. EUROPEAN BIOPHYSICS JOURNAL : EBJ 2022; 51:257-264. [PMID: 35262770 DOI: 10.1007/s00249-022-01592-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 12/15/2021] [Accepted: 02/22/2022] [Indexed: 06/14/2023]
Abstract
The interactions of a microbial cell with host cells and humoral factors play an important role in the development of infectious diseases. The study of these mechanisms contributes to the development of effective methods for the treatment of bacterial infections. One of the possible approaches to studying bacterial adhesion to host cells is based on the use of the optical trap method. The aim of this work was to assess the significance of lipopolysaccharide O-antigen on the adhesiveness of Yersinia pseudotuberculosis using a model system including a bacterial cell captured by a laser beam and monoclonal antibodies (mAbs) bound covalently to a glass substrate. Registered interaction forces between Y. pseudotuberculosis cells and complementary antibodies to the O-antigen of lipopolysaccharide (LPS) or the B antigen outer membrane protein were 5.9 ± 3.3 and 2.0 ± 1.8 pN, respectively. Interaction forces between O-antigen deficient Y. pestis cells and the mentioned mAbs were 4.2 ± 2.9 and 9.6 ± 4.9 pN. The results are qualitatively consistent with earlier data obtained by using a model system based on polymer beads sensitized with LPS from Y. pseudotuberculosis and Y. pestis and surfaces coated by the aforementioned antibodies. This indicates that the immunochemical activity of Y. pseudotuberculosis cells is mediated mainly by the lipopolysaccharide. The model described can be used in similar studies of physicochemical and immunochemical mechanisms of bacterial adhesiveness.
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Affiliation(s)
- Andrey Byvalov
- Institute of Physiology of Кomi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, Syktyvkar, Komi Republic, 167982, Russian Federation.
- Vyatka State University, Kirov, 610000, Russian Federation.
| | - Ilya Konyshev
- Institute of Physiology of Кomi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, Syktyvkar, Komi Republic, 167982, Russian Federation
- Vyatka State University, Kirov, 610000, Russian Federation
| | | | - Vladislav Belozerov
- Institute of Physiology of Кomi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, Syktyvkar, Komi Republic, 167982, Russian Federation
- Vyatka State University, Kirov, 610000, Russian Federation
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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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Ostrikov K, Kashani MN, Vasilev K, MacGregor MN. Fluid Flow Dependency in Immunoselective Cell Capture via Liquid Biopsy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:12388-12396. [PMID: 34596407 DOI: 10.1021/acs.langmuir.1c01998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Liquid biopsy targets rare cells that overexpress disease-specific membrane markers and capture these cells via immunoaffinity. The diagnosis efficiency of liquid biopsy can be impaired by the presence of healthy adherent cells also expressing the same biomarkers. Here, we investigated the effect of settling times and rinsing flow rates on the efficiency of EpCAM-based immunocapture using both simulation and experiments with three different cell types. Cell-surface adhesion forces and shear rates were calculated to define the range of rinsing flow rates to test experimentally. Healthy adherent cells did not adhere to blocked immunofunctionalized surfaces within the timeframe of the experiment; however, healthy EpCAM positive cells did bind to the surface to some extent. The greatest difference in capture efficiency was obtained using a high rinsing flow rate of 25 mL/min following 40 min static incubation, indicating that optimizing rinsing flow rates could be a viable option to capture, more specifically, cancer cells overexpressing EpCAM.
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Affiliation(s)
- Kola Ostrikov
- UniSA STEM, University of South Australia, Mawson Lakes 5095, Australia
| | - Moein Navvab Kashani
- UniSA STEM, University of South Australia, Mawson Lakes 5095, Australia
- South Australian Node of the Australian National Fabrication Facility, Mawson Lakes 5095, Australia
| | - Krasimir Vasilev
- UniSA STEM, University of South Australia, Mawson Lakes 5095, Australia
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Konyshev I, Byvalov A. Model systems for optical trapping: the physical basis and biological applications. Biophys Rev 2021; 13:515-529. [PMID: 34471436 DOI: 10.1007/s12551-021-00823-8] [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: 04/06/2021] [Accepted: 07/05/2021] [Indexed: 11/30/2022] Open
Abstract
The micromechanical methods, among which optical trapping and atomic force microscopy have a special place, are widespread currently in biology to study molecular interactions between different biological objects. Optical trapping is reported to be quite applicable to study the mechanical properties of surface structures onto bacterial (pili and flagella) and eukaryotic (filopodia) cells. The review briefly summarizes the physical basis of optical trapping, as well as the principles of calculating the van der Waals, electrostatic, and donor-acceptor forces when two microparticles or a microparticle and a flat surface are used. Three main types of model systems (abiotic, biotic, and mixed) used in trapping experiments are described, and the peculiarities of manipulation with living (bacteria, fungal spores, etc.) and non-spherical objects (e.g., rod-shaped bacteria) are summarized.
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Affiliation(s)
- Ilya Konyshev
- Institute of Physiology of Коmi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, Komi Republic, 167982 Syktyvkar, Russian Federation.,Vyatka State University, 36 Moskovskaya str, 610000 Kirov, Russian Federation
| | - Andrey Byvalov
- Institute of Physiology of Коmi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, Komi Republic, 167982 Syktyvkar, Russian Federation.,Vyatka State University, 36 Moskovskaya str, 610000 Kirov, Russian Federation
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Dudina LG, Novikova OD, Portnyagina OY, Khomenko VA, Konyshev IV, Byvalov AA. Role of Lipopolysaccharide and Nonspecific Porins of Yersinia pseudotuberculosis in the Reception of Pseudotuberculous Diagnostic Bacteriophage. APPL BIOCHEM MICRO+ 2021. [DOI: 10.1134/s0003683821040049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ananchenko B, Belozerov V, Byvalov A, Konyshev I, Korzhavina A, Dudina L. Evaluation of intermolecular forces between lipopolysaccharides and monoclonal antibodies using atomic force microscopy. Int J Biol Macromol 2020; 156:841-850. [PMID: 32305368 DOI: 10.1016/j.ijbiomac.2020.04.055] [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: 12/27/2019] [Revised: 03/20/2020] [Accepted: 04/06/2020] [Indexed: 11/19/2022]
Abstract
Understanding of interactions between a bacterium and an immune or non-immune host organism at the cellular and subcellular level is important in order to improve new and existing immunobiological tools for the treatment of bacterial infections (including pseudotuberculosis). The aim of this work was to quantify the interaction force between Yersinia pseudotuberculosis and monoclonal antibodies (mAbs) in the model system "lipopolysaccharide (LPS) - mAbs" by atomic force microscopy (AFM). Our research findings provided the methodical approaches to force measurements between an AFM probe, which was functionalized with Y. pseudotuberculosis LPS, and mica coated by different mAbs. Based on the criteria for force estimation there was shown a greater binding force in the system "LPS - complementary mAbs" than in the system "LPS - heterologous mAbs". In both cases binding force increase followed by increase a contact time between the functionalized AFM probe and mica from 1 to 5 s. It has been shown that single bonds between LPS and complementary mAbs molecules also included a clearly defined non-specific component along with immunochemically specific one. The evidence suggests a significant proportion of applied force exerted to unfolding of high-molecular aggregates whose length may attain many hundreds of nanometers.
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Affiliation(s)
| | - Vladislav Belozerov
- The Institute of Physiology of the Коmi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, Syktyvkar, Komi Republic 167982, Russian Federation; Vyatka State University, Kirov 610000, Russian Federation
| | - Andrey Byvalov
- The Institute of Physiology of the Коmi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, Syktyvkar, Komi Republic 167982, Russian Federation; Vyatka State University, Kirov 610000, Russian Federation.
| | - Ilya Konyshev
- The Institute of Physiology of the Коmi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, Syktyvkar, Komi Republic 167982, Russian Federation; Vyatka State University, Kirov 610000, Russian Federation
| | | | - Lyubov Dudina
- The Institute of Physiology of the Коmi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, Syktyvkar, Komi Republic 167982, Russian Federation; Vyatka State University, Kirov 610000, Russian Federation
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