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    Wyświetlanie 1-11 z 11
    Tytuł:
    Application of the micronucleus assay performed by different scorers in case of large-scale radiation accidents
    Autorzy:
    Rawojć, K.
    Tarnawska, D. M.
    Miszczyk, J. U.
    Swakoń, J.
    Stolarczyk, L.
    Rydygier, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/146534.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    biological dosimetry
    cytokinesis-blocked micronucleus assay
    frequency of micronuclei
    Opis:
    Mass casualty scenarios of radiation exposure require high throughput biological dosimetry techniques for population triage, in order to rapidly identify individuals, who require clinical treatment. Accurate dose estimates can be made by biological dosimetry, to predict the acute radiation syndrome (ARS) within days after a radiation accident or a malicious act involving radiation. Timely information on dose is important for the medical management of acutely irradiated persons [1]. The aim of the study was to evaluate the usefulness of the micronuclei (MNi) scoring procedure in an experimental mode, where 500 binucleated cells were analyzed in different exposure dose ranges. Whole-body exposure was simulated in an in vitro experiment by irradiating whole blood collected from one healthy donor with 60 MeV protons and 250 keV X-rays, in the dose range of 0.3–4.0 Gy. For achieving meaningful results, sample scoring was performed by three independent persons, who followed guidelines described in detail by Fenech et al. [2, 3]. Compared results revealed no signifi cant differences between scorers, which has important meaning in reducing the analysis time. Moreover, presented data based on 500 cells distribution, show that there are significant differences between MNi yields after 1.0 Gy exposure of blood for both protons and X-rays, implicating this experimental mode as appropriate for the distinction between high and low dose-exposed individuals, which allows early classification of exposed victims into clinically relevant subgroups.
    Źródło:
    Nukleonika; 2015, 60, No. 3, part 2; 643-649
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Test mikrojądrowy w retrospektywnej dozymetrii biologicznej
    Micronucleus assay in rapid retrospective biological dosimetry
    Autorzy:
    Rawojć, K.
    Miszczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/134746.pdf
    Data publikacji:
    2016
    Wydawca:
    ADVSEO
    Tematy:
    micronuclei
    micronucleus assay
    retrospective biological dosimetry
    ionizing radiation
    cell death
    Opis:
    Rapid retrospective biological dosimetry allows absorbed dose evaluation post exposure to ionizing radiation. One of the main tools of biodosimetry is based on the analysis of the effects resulting from the impact of ionizing radiation on the cell. Various cytogenetic tests give possibility of the accurate dose estimation. To investigate cell response to radiation one performs the analysis of biomarkers approved by International Atomic Energy Agency e.g. the analysis of dicentric chromosomes or micronuclei frequency. Micronucleus test is relatively a faster and therefore more effective method to study changes in the genetic material, induced by various genotoxic agents. This study confirms that micronulei frequency and nuclear division index analysis allows for appropriate absorbed dose estimation when it comes to ionizing radiation. In order to further optimize and facilitate the micronucleus assay and other cytogenetic tests in rapid retrospective biological dosimetry, the research are still ongoing.
    Źródło:
    Technical Issues; 2016, 4; 78-82
    2392-3954
    Pojawia się w:
    Technical Issues
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A cytogenetic approach to the effects of low levels of ionizing radiation (IR) on the exposed Tunisian hospital workers
    Autorzy:
    Bouraoui, Sana
    Mougou, Soumaya
    Drira, Afef
    Tabka, Faten
    Bouali, Nouha
    Mrizek, Najib
    Elghezal, Hatem
    Saad, Ali
    Powiązania:
    https://bibliotekanauki.pl/articles/2179799.pdf
    Data publikacji:
    2013-03-01
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    centromere-micronucleus assay
    occupational radiation exposure
    hospital workers
    centromere negative micronuculei
    Opis:
    Objectives: The aim of this study is to assess chromosomal damage in Tunisian hospital workers occupationally exposed to low levels of ionizing radiation (IR). Materials and Methods: The cytokinesis-block micronucleus (CBMN) assay in the peripheral lymphocytes of 67 exposed workers compared to 43 controls matched for gender, age and smoking habits was used. The clastogenic/aneugenic effect of IR was evaluated using the CBMN assay in combination with fluorescence in situ hybridization with human pan-centromeric DNA in all the exposed subjects and controls. Results: The study showed a signifi cant increase of the micronucleus (MN) frequency in the lymphocytes of the exposed workers compared to the control group (13.63±4.9‰ vs. 6.52±4.21‰, p < 0.05). The centromere analysis performed in our study showed that MNs in hospital staff were predominantly centromere negative (72%) and the mean negative labeled micronucleus (C–MN) frequency was signifi cantly higher in the exposed subjects than in the controls (9.04±4.57‰ vs. 1.17±0.77‰). The multivariate regression analysis, taking into account all confounding factors, showed that only the time of exposure to IR had a signifi cant effect on the level of MNs and C–MN. Conclusion: The present study shows that chromosomal damage leading to the formation of micronucleated lymphocytes is more frequent in the hospital workers exposed to IR than in the controls, despite the low levels of exposure. The results of the study confi rm the well-known clastogenic properties of ionizing radiation. In regards to health monitoring, detection of early genotoxic effects may allow for the adoption of preventive biological control measures, such as hygienic improvements in the workplace or reduction of hours of occupational exposure.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2013, 26, 1; 144-154
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cytotoxicity and genotoxicity of GO-Fe3O4 hybrid in cultured mammalian cells
    Autorzy:
    Jedrzejczak-Silicka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/779480.pdf
    Data publikacji:
    2017
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    GO-Fe3O4 hybrid
    relative viability
    DNA fragmentation
    micronucleus assay
    genotoxicity
    Opis:
    The study was aimed at investigating the effect of the Fe3O4  hybrid deposited on graphene oxide (GO- Fe3O4) on the relative viability and DNA integrity. The properties of the GO-Fe3O4  hybrid were analyzed using a transmission electron microscopy (TEM), X-ray diffraction technique (XRD) and thermal gravimetric method (TGA), while the efficiency of graphene oxide covalent functionalization with iron oxide nanospheres was determined by Fourier transform infrared spectroscopy (FT-IR). L929 and MCF-7 cell lines were selected to analyze the biocompatibility of GO-Fe3O4  nanoparticles. The hybrid was tested using WST-1 and LDH leakage assays. DNA integrity was analyzed by agarose gel electrophoresis and micronucleus assay was performed to examine chromosomal damage in the exposed cell lines. The tested GO-Fe3O4  hybrid did not significantly reduce cell metabolism of L929 cells. GO-Fe3O4 hybrid particles only slightly affected the integrity of cell membranes. DNA integrity and micronucleus assays did not indicate genotoxicity of the hybrid.
    Źródło:
    Polish Journal of Chemical Technology; 2017, 19, 1; 27-33
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Induction of Micronuclei in Mice Bone Marrow Cells by Cobalt and Copper Chlorides
    Autorzy:
    Goc Rasgele, P.
    Kekecoglu, M.
    Gokalp Muranli, F. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/204945.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chlorek kobaltu
    chlorek miedzi
    metale ciężkie
    test mikrojąderkowy
    mysz
    cobalt chloride
    copper chloride
    heavy metal
    mice
    micronucleus assay
    Opis:
    The aim of our research was to investigate the genotoxic effects of cobalt chloride and copper chloride in mouse bone marrow cells using the micronucleus (MN) assay. The three different concentrations of cobalt chloride (11.2, 22.5 and 45 mg kg-1) and copper chloride (1.17, 2.35 and 4.70 mg kg-1) were injected intraperitoneally to mice for 24 and 48 hours. It was observed that both of these heavy metals induced a signifi cant increase in frequency of micronucleated polychromatic erythrocytes (MNPCE) at different concentrations in mice for 24 and 48 hours when compared with the control. Furthermore, the signifi cant reduction for the polychromatic erythrocyte/normochromatic erythrocyte (PCE/NCE) ratio which is indicative of bone marrow cytotoxicity was observed in bone marrow cells which were treated with copper chloride at all concentrations for 24 and 48 hours. No reduction of the PCE/NCE ratio was observed both 24 and 48 hours after all the doses of cobalt chloride tested as compared to the negative control. These results lead us to the conclusion that copper chloride may have genotoxic and cytotoxic properties due to induction in the frequency of MN and a reduction in PCE/NCE ratio in bone marrow cells of mice, whereas cobalt chloride induced only genotoxic effect in mice bone marrow.
    Źródło:
    Archives of Environmental Protection; 2013, 39, 1; 75-82
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ biopaliw na częstość występowania mikrojąder w komórkach CHO-9 i A5491
    Effect of biofuels on frequency of micronuclei in CHO-9 and A549 cells
    Autorzy:
    Skowroń, Jolanta
    Zapór, Lidia
    Miranowicz-Dzierżawska, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/23352090.pdf
    Data publikacji:
    2023
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    biopaliwa
    genotoksyczność
    test mikrojądrowy
    in vitro
    nauki o zdrowiu
    inżynieria środowiskowa
    biofuels
    genotoxicity
    micronucleus assay
    health sciences
    environmental engineering
    Opis:
    Biopaliwa mają wiele zalet, które czynią je atrakcyjnym źródłem energii, jednak ich wpływ na organizm człowieka nie został jeszcze w pełni poznany. W artykule przedstawiono wyniki badań przeprowadzonych różnymi metodami w warunkach in vitro nad działaniem genotoksycznym czterech biopaliw otrzymanych w procesie transestryfikacji tłuszczów odpadowych. Badania uszkodzeń DNA (badanie mikrojąder) powodowanych przez biopaliwa przeprowadzono na komórkach nabłonka płuc pochodzenia nowotworowego (A549) oraz komórkach jajnika chomika chińskiego (CHO-9). Badane biopaliwa powodowały statystycznie istotny wzrost częstości występowania mikrojąder w komórkach CHO-9 (p < 0,05) w zależności od zastosowanych stężeń. Nie powodowały one jednak statystycznie znaczącego wzrostu częstości występowania mikrojąder w komórkach A549. Wyniki przeglądu baz danych (głównie MEDLINE i EMBASE) pozwoliły wskazać cztery główne źródła zagrożeń dla zdrowia ludzkiego, które są związane ze stosowaniem biopaliw: ryzyko zawodowe, zanieczyszczenie wody/gleby, zanieczyszczenie powietrza związane z produkcją i stosowaniem biopaliw oraz wpływ na ceny żywności. Wyniki przedstawionych badań stanowią jedynie etap oceny toksykologicznej biopaliw, których wpływ na komórki zależy od ich składu chemicznego i od rodzaju komórek stosowanych do badań. Biopaliwo II, otrzymywane z tłuszczu zwierzęcego i zawierające największe stężenie estrów metylowych kwasów tłuszczowych, wykazało działanie genotoksyczne (częstość występowania mikrojąder) w komórkach jajnika chomika chińskiego CHO-9. Przedstawione wyniki badań pozwolą producentom i użytkownikom biopaliw zapoznać się z ryzykiem związanym z ich produkcją i stosowaniem. Zakres tematyczny artykułu obejmuje zagadnienia zdrowia oraz bezpieczeństwa i higieny środowiska pracy będące przedmiotem badań z zakresu nauk o zdrowiu i inżynierii środowiska.
    Biofuels have a number of advantages that make them an attractive source of energy. However, their effect on the human body has not been fully understood. The article presents the results of studies on the genotoxic effect of four biofuels obtained in the process of transesterification of waste fats with in vitro methods. DNA damage tests (micronucleus test) of biofuels were carried out on the cells of: neoplastic lung epithelium (A549) and Chinese hamster ovary (CHO-9). The tested biofuels caused a statistically significant increase in the frequency of micronuclei in CHO-9 cells (p < 0.05), depending on the concentrations used. However, they did not induce a statistically significant increase in the frequency of micronuclei in A549 cells. The results of the database review (mainly MEDLINE and EMBASE) identified four main sources of human health risks from biofuels: occupational hazards, water / soil contamination, air pollution from biofuel production and use, and the impact on food prices. The results of the presented studies are only a step in the toxicological assessment of biofuels, the effect of which on cells depends on their chemical composition and the type of cells used for the tests. Biofuel II, obtained from animal fat, containing the highest concentration of fatty acid methyl esters showed the strongest genotoxic effect (induced frequency of micronuclei) on CHO-9 Chinese hamster ovary cells. The presented research results could familiarize the producers and users of biofuels with the risks associated with their use. This article discusses the problems of occupational safety and health, which are covered by health sciences and environmental engineering.
    Źródło:
    Podstawy i Metody Oceny Środowiska Pracy; 2023, 1 (115); 27--43
    1231-868X
    Pojawia się w:
    Podstawy i Metody Oceny Środowiska Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of buccal mucosa genotoxicity in insecticide-exposed urban fumigators in Cali, Colombia
    Autorzy:
    Londoño-Velasco, Elizabeth
    Asencio-Santofimio, Helberg
    Ortega-Avila, Jose G.
    Rosero-Caldón, Aldair B.
    Aristizabal-Grisales, Juan C.
    Rey-Henao, Laura
    Vargas-Rivera, Jairo A.
    Vergara-Escudero, Enrique
    Powiązania:
    https://bibliotekanauki.pl/articles/28762056.pdf
    Data publikacji:
    2024-03-05
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    insecticides
    occupational exposure
    buccal micronucleus cytome assay
    DNA damage
    biomarker
    personal protective equipment
    Opis:
    Objectives This study aimed to evaluate cytogenetic damage in the buccal mucosa of non-exposed subjects (N = 33) and insecticide-exposed fumigators (N = 31) in the urban area of Cali, Colombia. Material and Methods Through a questionnaire sociodemographic data, anthropometric measurements, state of health, and lifestyle were collected. Buccal micronucleus cytome (BMCyt) assay was using for evaluate cytogenetic damage. Results The study showed that all fumigators used adequate personal protective equipment (PPE) and had low alcohol consumption. The authors did not find significant differences in BMCyt biomarkers between the groups (p > 0.05). Multivariate analysis showed a 13% increase in micronucleus (MN) frequency for every year of increasing age (OR = 1.13, p = 0.029), and higher MN with the decrease in daily fruit consumption (OR = 4.71, p = 0.084), without statistical significance. Conclusions The results between groups could be related to healthy habits and PPE use among the subjects.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2024, 37, 1; 128-137
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Micronucleus assay in epithelial cells from the oral cavity and urinary tract in female smokers and non-smokers
    Autorzy:
    Błaszczyk, E.
    Mielzynska-Svach, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/363246.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    epithelial cells
    micronucleus assay
    oral cavity
    tobacco smoking
    urinary tract
    komórki nabłonkowe
    test mikrojądrowy
    jama ustna
    palenie tytoniu
    drogi moczowe
    Opis:
    The aim of the work was to investigate the possible use of epithelial cells from the oral cavity and urinary tract in identifying smoking-related effects in women. Epithelial cells from the oral cavity and urinary tract were collected from 9 smoking and 9 non-smoking women and subjected to micronucleus assay. The DNA damage (cells with micronuclei and nuclear buds), cytokinetic defects (binucleated cells) and cell death (condensed chromatin, karyorrhexis, pyknosis and karyolysis) were observed after DNA specific staining. In pooled analysis of the frequency of binucleated cells and condensed chromatin cells in 18 studied women, statistically significant differences were noted only in epithelial cells from the oral cavity in comparison to those of the urinary tract. Non pooled results demonstrated no differences in damage frequency in cells collected from the oral cavity and isolated from the urine. The lack of differences in the observed frequencies of micronuclei in buccal and urothelial cells could be an effect of the small size of the sampled group, smoking pattern of the women and the number of cigarettes smoked per day.
    Źródło:
    Environmental Biotechnology; 2014, 10, 2; 60-65
    1734-4964
    Pojawia się w:
    Environmental Biotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    In vitro micronucleus test assessment of polycyclic aromatic hydrocarbons
    Autorzy:
    Żelazna, K.
    Rudnicka, K.
    Tejs, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/363120.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    test mikrojądowy in-vitro
    blok cytokinetyczny
    linia komórkowa
    WWA
    właściwości mutagenne
    in vitro MN test
    cytokinesis-block micronucleus assay
    cell line
    PAH
    mutagenic properties
    Opis:
    Polycyclic aromatic hydrocarbons (PAH) can be dangerous due to their genotoxic properties and the formation of DNA adducts in the target organs. The increasing number of environmental pollutants containing polycyclic aromatic compounds requires the use of inexpensive and relatively quick assays enabling evaluation of potential genotoxicity of chemicals. Therefore, the in vitro micronucleus assay (MN) has been developed as a rapid screening test based on measuring and counting the micronuclei in various cells subjected to the examined compound. Combined with the cytokinesis-block micronucleus (CBMN) technique and the fluorescence in situ hybridization (FISH) assay, it also enables classification of compound mutagenic activity into aneugenic or clastogenic categories, the identification of the mechanism of MNi formation and the estimation of malsegregations of chromosomes amongst the two nuclei in binucleated cells. The combination of these different approaches is very useful in performing risk assessments of PAH with threshold types of dose responses.
    Źródło:
    Environmental Biotechnology; 2011, 7, 2; 70-80
    1734-4964
    Pojawia się w:
    Environmental Biotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlation between folate and vitamin B12 and markers of DNA stability in healthy men: preliminary results
    Autorzy:
    Milić, Mirta
    Rozgaj, Ružica
    Kašuba, Vilena
    Oreščanin, Višnja
    Balija, Melita
    Jukić, Irena
    Powiązania:
    https://bibliotekanauki.pl/articles/1040381.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    folic acid
    vitamin B12
    DNA damage
    healthy men
    comet assay
    micronucleus
    Opis:
    The aim of this study was to find correlations between folate and vitamin B12 on baseline damage in white blood cells and their association with smoking, alcohol consumption and ageing. Thirty-six healthy vitamin non-deficient male subjects were selected in a randomized study. Comet assay (SCGE) and micronucleus (MN) assay were used as biomarkers of DNA damage. The amount of DNA damage was correlated with vitamin B12 and folic acid concentration. Positive, but non-significant correlation (canonical R = 0.61; χ2=28.97; P=0.253) was found between micronucleus (MN) frequency or comet assay parameters (SCGE) and five covariates (age, smoking, alcohol consumption, vitamin B12 and folate blood serum concentration). The highest MN frequency was observed in the group with the lowest vitamin B12 concentration (F=3.59; P=0.024). The SCGE assay failed to show significant correlation with vitamin B12 or folic acid concentration. Concentration of vitamin B12 was significantly correlated with incidence of micronuclei. Our results present background data that could be valuable for future genotoxicological monitoring.
    Źródło:
    Acta Biochimica Polonica; 2010, 57, 3; 339-345
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    DNA damage in subpopulations of human lymphocytes irradiated with doses in the range of 0-1 Gy of X-radiation
    Autorzy:
    Wojewódzka, M.
    Machaj, E. K.
    Goździk, A.
    Iwaneńko, T.
    Ołdak, T.
    Kruszewski, M.
    Pojda, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/147760.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    alkaline comet assay
    biodosimetry
    micronucleus test
    histone gammaH2AX foci immunofluorescence assay
    T lymphocytes
    B lymphocytes
    ionizing radiation
    DNA damage
    Opis:
    We compared three methods usually applied in biological dosimetry for estimation of radiation-induced DNA damage in human T and B lymphocytes: alkaline comet assay, micronucleus (MN) test and formation of histone gamma-H2AX foci. Human peripheral blood lymphocytes were fractionated using T cells and B cells isolation kits. Cells were irradiated with doses in the range of 0-1 Gy of X-rays. Induction of DNA damage was assessed by the standard alkaline comet assay, MN test and histone gammaH2AX foci immunofluorescence assay. Notwithstanding different end-points measured by the applied methods, all tests revealed a similar induction of DNA damage in B lymphocytes as compared with T lymphocytes. The results indicated that all three tests detect DNA damage with similar sensitivity, the lowest dose being approximately 0.3 Gy. The difference between irradiated and control cells was expressed as the ratio of the value obtained for irradiated cells (1 Gy) to that for control cells. The highest ratio was obtained for formation of gammaH2AX foci and was 6.2 for T and 13.8 for B lymphocytes, whereas those for comet assay and micronucleus test were 3.5; 3.6 and 5.6; 4.8, respectively.
    Źródło:
    Nukleonika; 2008, 53, 4; 145-149
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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