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  1. Article: MicroRNAs are a key factor in the globalization of tumor-host relationships.

    Chekhun, V F

    Experimental oncology

    2019  Volume 41, Issue 3, Page(s) 188–194

    Abstract: A new round of molecular oncology development in the post-genomic era significantly changes the conventional understanding of the nature and origin of the malignant process. Increasingly, fundamental phenomena are emerging that change the "canonical" ... ...

    Abstract A new round of molecular oncology development in the post-genomic era significantly changes the conventional understanding of the nature and origin of the malignant process. Increasingly, fundamental phenomena are emerging that change the "canonical" views of the dominant role of gene mutations that contribute to the uncontrolled proliferation and emergence of heterogeneous malignant cells. Recent numerous studies have shown that significant variability in the initiation, proliferation and control of the apoptotic program of tumor cells is due to numerous epigenetic processes, including the level of expression of microRNAs (miRNAs). This paper reviews the literature data and presents the results of own research in which miRNAs have been found to form a molecular phenotype for malignancy. Their role as a "conductor" of the functioning of a genetic-epigenetic orchestra that coordinates various aspects of malignancy has been suggested. MiRNAs have been shown to be an active participant in balancing mechanisms in the development of controversial processes in breast cancer cell lines of varying degrees of malignancy. The analysis of the literature data and the own studies of the expression profile of only a few miRNAs suggests that scientists and clinicians have received a new marker and a target that simultaneously plays the role of an active insider in both the oncogene-oncosuppressor relationship and in the globalization of this process at the tumor-host level. Further investigation of the "alarm" marker in this network will allow to reconsider the molecular genetic classification of neoplastic disease, which will provide the development of a new strategy for cancer therapy.
    MeSH term(s) Cell Transformation, Neoplastic/genetics ; Disease Susceptibility ; Gene Expression Regulation, Neoplastic ; Humans ; MicroRNAs/genetics ; Neoplasms/genetics ; Neoplasms/metabolism ; Neoplasms/pathology ; RNA Interference
    Chemical Substances MicroRNAs
    Language English
    Publishing date 2019-09-27
    Publishing country Ukraine
    Document type Journal Article ; Review
    ZDB-ID 2176927-8
    ISSN 1812-9269 ; 0204-3564
    ISSN 1812-9269 ; 0204-3564
    DOI 10.32471/exp-oncology.2312-8852.vol-41-no-3.13431
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: [No title information]

    Domina, E A / Kopylenko, O L / Chekhun, V F

    Experimental oncology

    2023  Volume 45, Issue 2, Page(s) 151–160

    Abstract: The widespread introduction of nuclear technologies in industry, medicine, science, etc. increases the number of professionals subjected to additional radiation exposure. Moreover, the problem of occupational cancer is the most complicated in ... ...

    Title translation EVALUATION OF CURRENT FACTORS OF RADIATION-ASSOCIATED CARCINOGENESIS
    Abstract The widespread introduction of nuclear technologies in industry, medicine, science, etc. increases the number of professionals subjected to additional radiation exposure. Moreover, the problem of occupational cancer is the most complicated in occupational pathology due to the multifactorial nature of the etiology of this disease. The radiation accidents in Chornobyl and Fukushima-1 showed that nuclear reactors cannot guarantee absolutely safe operation. At present, the threat of nuclear terrorism is increasing. Occupational radiation exposure and its consequences are also of great concern worldwide. Based on the literature data and our own studies on the effects of various types of radiation exposure, especially stochastic effects of radiation, it seems reasonable to develop a scientific basis for the optimization of radiation protection of various categories of population, first of all, medical personnel and patients. The complex assessment of radiation risks and reconstruction of the total ionizing radiation dose from all types of irradiation will allow optimizing radiation protection of the population and reducing carcinogenic risk..
    MeSH term(s) Humans ; Carcinogenesis ; Radiation Dosage ; Radiation, Ionizing ; Occupational Exposure/adverse effects
    Language English
    Publishing date 2023-10-11
    Publishing country Ukraine
    Document type English Abstract ; Journal Article
    ZDB-ID 2176927-8
    ISSN 2312-8852 ; 1812-9269 ; 0204-3564
    ISSN (online) 2312-8852
    ISSN 1812-9269 ; 0204-3564
    DOI 10.15407/exp-oncology.2023.02.151
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Can SARS-CoV-2 change individual radiation sensitivity of the patients recovered from COVID-19? (experimental and theoretical background).

    Chekhun, V F / Domina, E A

    Experimental oncology

    2021  Volume 43, Issue 3, Page(s) 277–280

    Abstract: R.E. Kavetsky Institute of Experimental Pathology, Oncology and Radiobiology of the National Academy of Science of Ukraine has been studying the mechanisms and specificities of individual radiation sensitivity (IRS) formation in professionals who work in ...

    Abstract R.E. Kavetsky Institute of Experimental Pathology, Oncology and Radiobiology of the National Academy of Science of Ukraine has been studying the mechanisms and specificities of individual radiation sensitivity (IRS) formation in professionals who work in the field of ionizing radiation, cancer patients and representatives of other population groups. Our data based on the use of G
    MeSH term(s) COVID-19 ; Chromosome Aberrations ; Genomic Instability ; Humans ; Lymphocytes/radiation effects ; Neoplasms/radiotherapy ; Neoplasms/virology ; Occupational Exposure ; Radiation Exposure ; Radiation Oncologists ; Radiation Tolerance
    Language English
    Publishing date 2021-09-30
    Publishing country Ukraine
    Document type Journal Article
    ZDB-ID 2176927-8
    ISSN 1812-9269 ; 0204-3564
    ISSN 1812-9269 ; 0204-3564
    DOI 10.32471/exp-oncology.2312-8852.vol-43-no-3.16554
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Book ; Online: Chapter Sorption Detoxification as an Addition to Conventional Therapy of Acute Radiation Sickness and Iatrogenic Leukopenia

    Sarnatskaya, V. V. / Snezhkova, E. A. / Chekhun, Vasyl F. / Vg, Nikolaev / Bilous, Anatoliy G. / Shevchuk, O. O. / Badakhivska, Kvitoslava I. / Sakhno, L. A.

    2019  

    Keywords Medical microbiology & virology ; leukopenia, ionizing irradiation, anti-cancer chemotherapy, granulocyte colony stimulating factor, hemosorption, enterosorption, application-sorption therapy
    Size 1 Online-Ressource
    Publisher InTechOpen
    Document type Book ; Online
    Note English ; Open Access
    HBZ-ID HT021047889
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  5. Article: HUMAN MICROBIOTA AND BREAST CANCER.

    Shvets, Yu V / Lykhova, O O / Chekhun, V F

    Experimental oncology

    2022  Volume 44, Issue 2, Page(s) 95–106

    Abstract: Breast cancer is the leading malignancy in women worldwide. To date, much is known about the molecular subtypes of these malignant neoplasms and the mechanisms of drug resistance. Significant success has been achieved in approaches to early diagnosis, ... ...

    Abstract Breast cancer is the leading malignancy in women worldwide. To date, much is known about the molecular subtypes of these malignant neoplasms and the mechanisms of drug resistance. Significant success has been achieved in approaches to early diagnosis, which allows identifying the tumor process in the early stages of development. Recently, the study of the influence of the human body microbiota on cancer development and the effectiveness of treatment has become an actively developing field of research. This review presents an analysis of the literature data on this issue.
    MeSH term(s) Breast Neoplasms/diagnosis ; Breast Neoplasms/etiology ; Breast Neoplasms/therapy ; Female ; Humans ; Microbiota
    Language English
    Publishing date 2022-08-08
    Publishing country Ukraine
    Document type Journal Article ; Review
    ZDB-ID 2176927-8
    ISSN 1812-9269 ; 0204-3564
    ISSN 1812-9269 ; 0204-3564
    DOI 10.32471/exp-oncology.2312-8852.vol-44-no-2.17855
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Modern views on the role of main components of stroma and tumor microinvironment in invasion, migration and metastasis.

    Naleskina, L A / Kunska, L M / Chekhun, V F

    Experimental oncology

    2021  Volume 42, Issue 4, Page(s) 252–262

    Abstract: The review presents modern ideas about tumor microenvironment, which most researchers recognize as the main "player" in tumor cell invasion, cell migration and metastasis. The current data on the main components of the stroma and the microenvironment, ... ...

    Abstract The review presents modern ideas about tumor microenvironment, which most researchers recognize as the main "player" in tumor cell invasion, cell migration and metastasis. The current data on the main components of the stroma and the microenvironment, which play the role of the driving force in tumor progression, are analyzed. In particular, the review highlights the issues of origin, biological traits, phenotypic plasticity, functional heterogeneity of activated fibroblasts - myofibroblasts and tumor-associated fibroblasts, which in recent years have received much attention. Such components of the extracellular matrix proteome as collagen and matrix metalloproteinases are discussed in detail. They are mostly produced by activated fibroblasts and, on the one hand, initiate the development of desmoplasia due to type I collagen and, on the other hand, promote degradation of extracellular matrix proteins due to metalloproteinases, which generally leads to tissue remodeling that promotes tumor progression. Possibilities of using the most important indicators of extracellular matrix remodeling as potential markers and targets of clinical strategy are discussed.
    MeSH term(s) Animals ; Biomarkers ; Cancer-Associated Fibroblasts/metabolism ; Cancer-Associated Fibroblasts/pathology ; Cell Movement ; Disease Susceptibility ; Extracellular Matrix/metabolism ; Extracellular Matrix Proteins/genetics ; Extracellular Matrix Proteins/metabolism ; Gene Expression Regulation, Neoplastic ; Humans ; Neoplasm Invasiveness ; Neoplasm Metastasis ; Neoplasms/etiology ; Neoplasms/metabolism ; Neoplasms/pathology ; Signal Transduction ; Stromal Cells/metabolism ; Stromal Cells/pathology ; Tumor Microenvironment
    Chemical Substances Biomarkers ; Extracellular Matrix Proteins
    Language English
    Publishing date 2021-01-22
    Publishing country Ukraine
    Document type Journal Article ; Review
    ZDB-ID 2176927-8
    ISSN 1812-9269 ; 0204-3564
    ISSN 1812-9269 ; 0204-3564
    DOI 10.32471/exp-oncology.2312-8852.vol-42-no-4.15401
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Morphological features of doxorubicin-resistant Walker 256 carcinosarcoma and response of mast cells.

    Boroday, N V / Chekhun, V F

    Experimental oncology

    2018  Volume 40, Issue 1, Page(s) 42–47

    Abstract: Background: The mechanisms of drug resistance of cancer have not been yet elucidated in details. Recently, the role of mast cells (MCs) in the development of drug resistance has been brought in the limelight. The aim of the study was to examine the ... ...

    Abstract Background: The mechanisms of drug resistance of cancer have not been yet elucidated in details. Recently, the role of mast cells (MCs) in the development of drug resistance has been brought in the limelight. The aim of the study was to examine the morphological features of doxorubicin (DOX)-resistant Walker 256 carcinosarcoma and to assess the response of MCs and histamine content in these cells in relation to the development of resistance to DOX as well as in DOX-resistant tumors.
    Materials and methods: The DOX resistance was induced by serial passages of Walker 256 carcinosarcoma in rats in the setting of DOX treatment in vivo. MCs in tumors were detected in the sections by staining with Toluidine Blue O. Histamine content in MCs stained with solution of Water Blue-Orcein was assessed by Astaldi semiquantitative method taking into account different staining intensity.
    Results: Formation of DOX resistance in the course of serial passages of Walker 256 carcinosarcoma was accompanied by the increase in the number of MCs in tumors and histamine content. Nevertheless, in tumors with phenotype of complete DOX resistance the number of histamine-containing MCs decreased to the same level as in tumors of the original strain that are DOX-sensitive.
    Conclusion: MCs are involved in formation of DOX resistance in Walker 256 carcinosarcoma.
    MeSH term(s) Animals ; Carcinoma 256, Walker/metabolism ; Carcinoma 256, Walker/pathology ; Doxorubicin ; Drug Resistance, Neoplasm/physiology ; Histamine/metabolism ; Mast Cells/metabolism ; Mast Cells/pathology ; Rats
    Chemical Substances Doxorubicin (80168379AG) ; Histamine (820484N8I3)
    Language English
    Publishing date 2018-03-30
    Publishing country Ukraine
    Document type Journal Article
    ZDB-ID 2176927-8
    ISSN 1812-9269 ; 0204-3564
    ISSN 1812-9269 ; 0204-3564
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Human microbiota and effectiveness of cancer chemotherapy.

    Shvets, Yu V / Lukianova, N Yu / Chekhun, V F

    Experimental oncology

    2020  Volume 42, Issue 2, Page(s) 82–93

    Abstract: This review presents up-to-date information on the effects of microbiota on the individual chemotherapy sensitivity in cancer treatment. Recent studies have shown that a fine balance between the intestinal microbiota and the immune system is crucial for ... ...

    Abstract This review presents up-to-date information on the effects of microbiota on the individual chemotherapy sensitivity in cancer treatment. Recent studies have shown that a fine balance between the intestinal microbiota and the immune system is crucial for maintaining an efficacy of cancer chemotherapy. A number of antitumor drugs have complex mechanisms of action involving not only direct effects but also the activity of the intestinal microbiota and the immune system. A unique combination of these factors contributes to the individual chemotherapy sensitivity.
    MeSH term(s) Anti-Bacterial Agents/adverse effects ; Anti-Bacterial Agents/therapeutic use ; Antineoplastic Agents/adverse effects ; Antineoplastic Agents/pharmacokinetics ; Antineoplastic Agents/pharmacology ; Gastrointestinal Microbiome/drug effects ; Gastrointestinal Microbiome/physiology ; Humans ; Immunomodulation/drug effects ; Inactivation, Metabolic ; Intestinal Mucosa/drug effects ; Neoplasms/drug therapy ; Neoplasms/microbiology
    Chemical Substances Anti-Bacterial Agents ; Antineoplastic Agents
    Keywords covid19
    Language English
    Publishing date 2020-06-29
    Publishing country Ukraine
    Document type Journal Article ; Review
    ZDB-ID 2176927-8
    ISSN 1812-9269 ; 0204-3564
    ISSN 1812-9269 ; 0204-3564
    DOI 10.32471/exp-oncology.2312-8852.vol-42-no-2.14611
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: BIOMAGNETISM OF DRUG-SENSITIVE AND DRUG-RESISTANT MALIGNANT TUMORS AFTER INJECTION OF FERROMAGNETIC NANOCOMPOSITE.

    Todor, I N / Lukianova, N Yu / Primin, M A / Nedayvoda, I V / Chekhun, V F

    Experimental oncology

    2022  Volume 44, Issue 4, Page(s) 320–323

    Abstract: Magnetic signals emitted by living organisms, regardless of a biological species, are important biophysical indicators. The study of these indicators is very relevant and promising for the visualization of the tumor process and the development of ... ...

    Abstract Magnetic signals emitted by living organisms, regardless of a biological species, are important biophysical indicators. The study of these indicators is very relevant and promising for the visualization of the tumor process and the development of technologies using artificial intelligence when it comes to malignant neoplasms, particularly resistant to chemotherapy.
    Aim: To measure magnetic signals from transplantable rat tumors and their counterparts resistant to cytostatics for evaluating the features of the accumulation of iron-containing nanocomposite Ferroplat.
    Materials and methods: Doxorubicin (Dox)-sensitive and Dox-resistant Walker-256 carcinosarcoma and cisplatin-sensitive and cisplatin-resistant Guerin's carcinoma transplanted in female Wistar rats were studied. The magnetism of tumors, liver and heart was determined using Superconductive Quantum Interference Device (SQUID) - magnetometry in a non-contact (13 mm over the tumor) way using specially designed computer programs. In a group of the experimental animals, a ferromagnetic nanocomposite (Ferroplat) was administered as a single intravenous injection and biomagnetism was assessed in 1 h.
    Results: The magnetic signals coming from Dox-resistant Walker-256 carcinosarcoma in the exponential growth phase were significantly higher in comparison with sensitive tumor. Intravenous administration of Ferroplat increased biomagnetism by at least an order of magnitude, especially in resistant tumors. At the same time, the magnetic signals of the liver and heart were within the magnetic noise.
    Conclusion: The use of SQUID-magnetometry with ferromagnetic nanoparticles as a contrast agent is a promising approach for visualization of malignant neoplasms with varying sensitivity to chemotherapy.
    MeSH term(s) Rats ; Female ; Animals ; Cisplatin ; Rats, Wistar ; Artificial Intelligence ; Doxorubicin/therapeutic use ; Carcinoma/drug therapy ; Carcinosarcoma/drug therapy ; Nanocomposites
    Chemical Substances Cisplatin (Q20Q21Q62J) ; Doxorubicin (80168379AG)
    Language English
    Publishing date 2022-10-29
    Publishing country Ukraine
    Document type Journal Article
    ZDB-ID 2176927-8
    ISSN 1812-9269 ; 0204-3564
    ISSN 1812-9269 ; 0204-3564
    DOI 10.32471/exp-oncology.2312-8852.vol-44-no-4.19093
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Macrophages - a perspective target for antineoplastic immunotherapy.

    Karaman, О М / Ivanchenko, A V / Chekhun, V F

    Experimental oncology

    2019  Volume 41, Issue 4, Page(s) 282–290

    Abstract: The review discusses the data on the functional/phenotypic M1/M2 types of macrophages and their chimeric forms, the molecular mechanisms of polarization of these cells, and their role in the development of malignant tumors. Information on the prognostic ... ...

    Abstract The review discusses the data on the functional/phenotypic M1/M2 types of macrophages and their chimeric forms, the molecular mechanisms of polarization of these cells, and their role in the development of malignant tumors. Information on the prognostic value of the presence (density and location) of M1/M2 cells in tumor tissue is analyzed. Our own results evidence on the necessity of determination of the functional/phenotypic state of M1/M2 macrophages from different biological niches in the dynamics of tumor growth, in particular in terms of NO level and arginase activity.
    MeSH term(s) Animals ; Arginase/analysis ; Arginase/immunology ; Humans ; Immunotherapy ; Macrophage Activation ; Macrophages/immunology ; Macrophages/pathology ; Neoplasms/immunology ; Neoplasms/pathology ; Neoplasms/therapy ; Nitric Oxide/analysis ; Nitric Oxide/immunology
    Chemical Substances Nitric Oxide (31C4KY9ESH) ; Arginase (EC 3.5.3.1)
    Language English
    Publishing date 2019-12-23
    Publishing country Ukraine
    Document type Journal Article ; Review
    ZDB-ID 2176927-8
    ISSN 1812-9269 ; 0204-3564
    ISSN 1812-9269 ; 0204-3564
    DOI 10.32471/exp-oncology.2312-8852.vol-41-no-4.13698
    Database MEDical Literature Analysis and Retrieval System OnLINE

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