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Agapova OI, Efimov AE, Obraztsova EA, Mochalov KE, Solovyeva DO, Oleinikov VA, Agapov II, Gautier SV. Identification of Ultrastructural Details of the Astrocyte Process System in Nervous Tissue of the Brain Using Correlative Scanning Probe and Transmission Electron Microscopy. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2023; 513:S51-S54. [PMID: 38430297 DOI: 10.1134/s0012496623600185] [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: 11/29/2023] [Revised: 12/27/2023] [Accepted: 12/28/2023] [Indexed: 03/03/2024]
Abstract
Nanoscale morphological features of branched processes of glial cells may be of decisive importance for neuron-astrocyte interactions in health and disease. The paper presents the results of a correlation analysis of images of thin processes of astrocytes in nervous tissue of the mouse brain, which were obtained by scanning probe microscopy (SPM) and transmission electron microscopy (TEM) with high spatial resolution. Samples were prepared and imaged using a unique hardware combination of ultramicrotomy and SPM. Astrocyte details with a thickness of several tens of nanometers were identifiable in the images, making it possible to reconstruct the three-dimensional structure of astrocytic processes by integrating a series of sequential images of ultrathin sections of nervous tissue in the future.
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Affiliation(s)
- O I Agapova
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Ministry of Health of the Russian Federation, Moscow, Russia
| | - A E Efimov
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Ministry of Health of the Russian Federation, Moscow, Russia
| | - E A Obraztsova
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - K E Mochalov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - D O Solovyeva
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - V A Oleinikov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, Russia
| | - I I Agapov
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Ministry of Health of the Russian Federation, Moscow, Russia.
| | - S V Gautier
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Ministry of Health of the Russian Federation, Moscow, Russia
- Sechenov First Moscow State Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
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Aitova A, Berezhnoy A, Tsvelaya V, Gusev O, Lyundup A, Efimov AE, Agapov I, Agladze K. Biomimetic Cardiac Tissue Models for In Vitro Arrhythmia Studies. Biomimetics (Basel) 2023; 8:487. [PMID: 37887618 PMCID: PMC10604593 DOI: 10.3390/biomimetics8060487] [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: 08/28/2023] [Revised: 09/26/2023] [Accepted: 10/03/2023] [Indexed: 10/28/2023] Open
Abstract
Cardiac arrhythmias are a major cause of cardiovascular mortality worldwide. Many arrhythmias are caused by reentry, a phenomenon where excitation waves circulate in the heart. Optical mapping techniques have revealed the role of reentry in arrhythmia initiation and fibrillation transition, but the underlying biophysical mechanisms are still difficult to investigate in intact hearts. Tissue engineering models of cardiac tissue can mimic the structure and function of native cardiac tissue and enable interactive observation of reentry formation and wave propagation. This review will present various approaches to constructing cardiac tissue models for reentry studies, using the authors' work as examples. The review will highlight the evolution of tissue engineering designs based on different substrates, cell types, and structural parameters. A new approach using polymer materials and cellular reprogramming to create biomimetic cardiac tissues will be introduced. The review will also show how computational modeling of cardiac tissue can complement experimental data and how such models can be applied in the biomimetics of cardiac tissue.
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Affiliation(s)
- Aleria Aitova
- Laboratory of Experimental and Cellular Medicine, Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
- M.F. Vladimirsky Moscow Regional Clinical Research Institute, 129110 Moscow, Russia
- Almetyevsk State Oil Institute, 423450 Almetyevsk, Russia
| | - Andrey Berezhnoy
- Laboratory of Experimental and Cellular Medicine, Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
- M.F. Vladimirsky Moscow Regional Clinical Research Institute, 129110 Moscow, Russia
- Almetyevsk State Oil Institute, 423450 Almetyevsk, Russia
| | - Valeriya Tsvelaya
- Laboratory of Experimental and Cellular Medicine, Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
- M.F. Vladimirsky Moscow Regional Clinical Research Institute, 129110 Moscow, Russia
- Almetyevsk State Oil Institute, 423450 Almetyevsk, Russia
| | - Oleg Gusev
- Regulatory Genomics Research Center, Institute of Fundamental Medicine and Biology, Kazan Federal University, 420018 Kazan, Russia
- Life Improvement by Future Technologies (LIFT) Center, 143025 Moscow, Russia
- Intractable Disease Research Center, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan
| | | | - Anton E. Efimov
- Academician V.I. Shumakov National Medical Research Center of Transplantology and Artificial Organs, Ministry of Health of the Russian Federation, 123182 Moscow, Russia
| | - Igor Agapov
- Academician V.I. Shumakov National Medical Research Center of Transplantology and Artificial Organs, Ministry of Health of the Russian Federation, 123182 Moscow, Russia
| | - Konstantin Agladze
- Laboratory of Experimental and Cellular Medicine, Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
- M.F. Vladimirsky Moscow Regional Clinical Research Institute, 129110 Moscow, Russia
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Agapova OI, Efimov AE, Mochalov KE, Solovyeva DO, Gileva AM, Markvicheva EA, Yakovlev DV, Lyundup AV, Oleinikov VA, Agapov II, Gautier SV. Correlative Fluorescent Scanning Probe Nanotomography Used to Study the Intracellular Distribution of Doxorubicin in MCF-7 Human Breast Adenocarcinoma Cells. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2023; 509:103-106. [PMID: 37208575 DOI: 10.1134/s0012496623700266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 11/29/2022] [Accepted: 12/01/2022] [Indexed: 05/21/2023]
Abstract
Developing technologies for efficient targeted drug delivery for oncotherapy requires new methods to analyze the features of micro- and nanoscale distributions of antitumor drugs in cells and tissues. A new approach to three-dimensional analysis of the intracellular distribution of cytostatics was developed using fluorescence scanning optical-probe nanotomography. A correlative analysis of the nanostructure and distribution of injected doxorubicin in MCF-7 human breast adenocarcinoma cells revealed the features of drug penetration and accumulation in the cell. The technology is based on the principles of scanning optical probe nanotomography and is applicable to studying the distribution patterns of various fluorescent or fluorescence-labelled substances in cells and tissues.
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Affiliation(s)
- O I Agapova
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Moscow, Russia.
| | - A E Efimov
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Moscow, Russia
| | - K E Mochalov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - D O Solovyeva
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - A M Gileva
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - E A Markvicheva
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - D V Yakovlev
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - A V Lyundup
- Рeoples' Friendship University of Russia, Moscow, Russia
| | - V A Oleinikov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
- National Research Nuclear University, Moscow, Russia
| | - I I Agapov
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Moscow, Russia
| | - S V Gautier
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Moscow, Russia
- Sechenov First Moscow State Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
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Bobrova M, Safonova L, Efimov A, Lyundup A, Mozheiko N, Agapova O, Agapov I. Scaffolds Based on Silk Fibroin with Decellularized Rat Liver Microparticles: Investigation of the Structure, Biological Properties and Regenerative Potential for Skin Wound Healing. Pharmaceutics 2022; 14:2313. [PMID: 36365132 PMCID: PMC9693194 DOI: 10.3390/pharmaceutics14112313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/19/2022] [Accepted: 10/25/2022] [Indexed: 10/18/2023] Open
Abstract
The development of advanced biomaterials and constructs for accelerated recovery of damaged tissues is a key direction in regenerative medicine. Biocompatible scaffolds based on natural biopolymers are widely used for these tasks. Organ decellularization enables obtaining a cell-free extracellular matrix (ECM) with preserved composition and biological activity. The objectives of the present work were combining these two approaches for the development of a composite scaffold based on silk fibroin and ECM microparticles and assessing its structure, biological properties, and regenerative potential. ECM microparticles were obtained by grinding the decellularized matrix of Wistar rat liver in liquid nitrogen. Scaffolds in the form of films were prepared by the casting method. The sinuous and rough topography of the scaffold surface was assessed by the scanning probe nanotomography (SPNT) technique. The inclusion of ECM microparticles in the composition did not affect the elasticity and tensile strength of the scaffolds. The obtained scaffold was non-toxic to cells, maintained high levels of adhesion and proliferation of mouse 3T3 fibroblast and Hep-G2 cells, and showed high regenerative potential, which was studied in the experimental model of full-thickness rat skin wound healing. The wound healing was accelerated by 1.74 times in comparison with the control.
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Affiliation(s)
- Maria Bobrova
- Academician V.I. Shumakov National Medical Research Center of Transplantology and Artificial Organs, Ministry of Health of the Russian Federation, 1 Shchukinskaya Street, 123182 Moscow, Russia
| | - Liubov Safonova
- Academician V.I. Shumakov National Medical Research Center of Transplantology and Artificial Organs, Ministry of Health of the Russian Federation, 1 Shchukinskaya Street, 123182 Moscow, Russia
| | - Anton Efimov
- Academician V.I. Shumakov National Medical Research Center of Transplantology and Artificial Organs, Ministry of Health of the Russian Federation, 1 Shchukinskaya Street, 123182 Moscow, Russia
| | - Alexey Lyundup
- Educational Resource Center for Cellular Technologies, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, 117198 Moscow, Russia
| | - Natalya Mozheiko
- Academician V.I. Shumakov National Medical Research Center of Transplantology and Artificial Organs, Ministry of Health of the Russian Federation, 1 Shchukinskaya Street, 123182 Moscow, Russia
| | - Olga Agapova
- Academician V.I. Shumakov National Medical Research Center of Transplantology and Artificial Organs, Ministry of Health of the Russian Federation, 1 Shchukinskaya Street, 123182 Moscow, Russia
| | - Igor Agapov
- Academician V.I. Shumakov National Medical Research Center of Transplantology and Artificial Organs, Ministry of Health of the Russian Federation, 1 Shchukinskaya Street, 123182 Moscow, Russia
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Agapova OI, Efimov AE, Mochalov KE, Solovyeva DO, Svirshchevskaya EV, Klimentov SM, Popov AA, Oleinikov VA, Agapov II, Gautier SV. Investigation of the Distribution of Magnetic Nanoparticles in Tumor Tissues by the Method of Scanning Magnetic Force Nanotomography. DOKL BIOCHEM BIOPHYS 2022; 504:115-117. [DOI: 10.1134/s1607672922030012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/20/2022] [Accepted: 01/20/2022] [Indexed: 11/23/2022]
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Silicon-Gold Nanoparticles Affect Wharton's Jelly Phenotype and Secretome during Tri-Lineage Differentiation. Int J Mol Sci 2022; 23:ijms23042134. [PMID: 35216249 PMCID: PMC8874983 DOI: 10.3390/ijms23042134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/10/2022] [Accepted: 02/11/2022] [Indexed: 12/14/2022] Open
Abstract
Multiple studies have demonstrated that various nanoparticles (NPs) stimulate osteogenic differentiation of mesenchymal stem cells (MSCs) and inhibit adipogenic ones. The mechanisms of these effects are not determined. The aim of this paper was to estimate Wharton’s Jelly MSCs phenotype and humoral factor production during tri-lineage differentiation per se and in the presence of silicon–gold NPs. Silicon (SiNPs), gold (AuNPs), and 10% Au-doped Si nanoparticles (SiAuNPs) were synthesized by laser ablation, characterized, and studied in MSC cultures before and during differentiation. Humoral factor production (n = 41) was analyzed by Luminex technology. NPs were nontoxic, did not induce ROS production, and stimulated G-CSF, GM-CSF, VEGF, CXCL1 (GRO) production in four day MSC cultures. During MSC differentiation, all NPs stimulated CD13 and CD90 expression in osteogenic cultures. MSC differentiation resulted in a decrease in multiple humoral factor production to day 14 of incubation. NPs did not significantly affect the production in chondrogenic cultures and stimulated it in both osteogenic and adipogenic ones. The major difference in the protein production between osteogenic and adipogenic MSC cultures in the presence of NPs was VEGF level, which was unaffected in osteogenic cells and 4–9 times increased in adipogenic ones. The effects of NPs decreased in a row AuNPs > SiAuNPs > SiNPs. Taken collectively, high expression of CD13 and CD90 by MSCs and critical level of VEGF production can, at least, partially explain the stimulatory effect of NPs on MSC osteogenic differentiation.
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Agapova OI, Efimov AE, Safonova LA, Bobrova MM, Agapov II, Gautier SV. Scanning Optical Probe Nanotomography for Investigation of the Structure of Biomaterials and Cells. DOKL BIOCHEM BIOPHYS 2021; 500:331-334. [PMID: 34697739 DOI: 10.1134/s160767292105001x] [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: 04/20/2021] [Revised: 06/04/2021] [Accepted: 06/04/2021] [Indexed: 11/22/2022]
Abstract
Creation of new effective bio-artificial structures for tissue engineering and regenerative medicine requires development and implementation of new technological approaches for analysis of micro- and nanostructural features of constructs based on biomaterials and their interaction with cells. A new method of three-dimensional multiparametric analysis of nanostructure, scanning optical probe nanotomography, is presented in this paper, applied to the analysis of cells and biomaterials. Correlative reconstruction of fluorescent marker distributions and nanostructure features allows quantitative evaluation of a number of parameters of three-dimensional nanomorphology of fibroblasts and human hepatocarcinoma cells Hep-G2, adhered to biodegradable scaffolds based on silk fibroin. The developed technology with use of scanning optical probe nanotomography is applicable to investigation of three-dimensional micro- and nanostructure features of biomaterials and cells of different types.
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Affiliation(s)
- O I Agapova
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Moscow, Russia
| | - A E Efimov
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Moscow, Russia
| | - L A Safonova
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Moscow, Russia
| | - M M Bobrova
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Moscow, Russia
| | - I I Agapov
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Moscow, Russia.
| | - S V Gautier
- Shumakov National Medical Research Center of Transplantology and Artificial Organs, Moscow, Russia
- Sechenov University, Moscow, Russia
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Dovzhenko D, Mochalov K, Vaskan I, Kryukova I, Rakovich Y, Nabiev I. Polariton-assisted splitting of broadband emission spectra of strongly coupled organic dye excitons in tunable optical microcavity. OPTICS EXPRESS 2019; 27:4077-4089. [PMID: 30876029 DOI: 10.1364/oe.27.004077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 01/25/2019] [Indexed: 06/09/2023]
Abstract
Resonance interaction between a localized electromagnetic field and excited states in molecules paves the way to control fundamental properties of a matter. In this study, we encapsulated organic molecules with relatively low unoriented dipole moments in the polymer matrix, placed them in tunable optical microcavity and realized, for the first time, controllable modification of the broad photoluminescence (PL) emission of these molecules in strong coupling regime at room temperature. Notably, while in most previous studies it was reported that the single mode dominates in the PL signal (radiation of the so-called branch of the lower polariton), here we report on the observation of two distinct PL peaks, evolution of which has been followed as the microcavity mode is detuned from the excitonic resonance. A significant Rabi splitting estimated from the modified PL spectra was as large as 225 meV. The developed approach can be used both in fundamental research of resonant light-mater coupling and its practical applications in sensing and development of coherent spontaneous emission sources using a combination of carefully designed microcavity with a wide variety of organic molecules.
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