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Pajic J, Rakic B. Re-evaluation of CBMN test reference values of persons continuously occupationally exposed to low doses of ionizing radiation in Serbia. Mutat Res Genet Toxicol Environ Mutagen 2023; 886:503583. [PMID: 36868697 DOI: 10.1016/j.mrgentox.2023.503583] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/01/2023] [Accepted: 01/02/2023] [Indexed: 01/05/2023]
Abstract
When established, cytokinesis-block micronucleus (CBMN) test reference values should be periodically evaluated according to the recommendations of reference documents. The biodosimetry cytogenetic laboratory of the Serbian Institute of Occupational Health established the CBMN test reference range for people occupationally exposed to ionizing radiation in 2016. Since then, new occupationally exposed persons have been subjected to micronucleus testing, resulting in the need for re-evaluation of existing CBMN test values. The examined population comprised 608 occupationally exposed subjects - 201 from the previous laboratory database and 407 newly examined. Comparison of groups based on gender, age and cigarette consumption did not show significant differences, although certain CBMN values differed significantly between the old and new groups. Duration of occupational exposure, gender, age and smoking habit influenced micronuclei frequency in all three analyzed groups, while no relation was found between type of work and micronucleus test parameters. Since the mean values of all tested parameters in the new group of examinees are within previously established reference ranges, existing values can be used in further research.
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Affiliation(s)
- J Pajic
- Serbian Institute of Occupational Health "Dr Dragomir Karajovic", Deligradska 29, Belgrade, Serbia.
| | - B Rakic
- Serbian Institute of Occupational Health "Dr Dragomir Karajovic", Deligradska 29, Belgrade, Serbia.
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Giri S, Barhoi D, Nath Barbhuiya S, Giri A, Das S, Das A, Devi SH, Talukdar D, Upadhaya P, Langthasa P, Pandey N, Singh S. Consumption pattern and genotoxic potential of various smokeless tobacco products in Assam, India: A public health concern. Mutat Res 2021; 866:503349. [PMID: 33985693 DOI: 10.1016/j.mrgentox.2021.503349] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 03/02/2021] [Accepted: 03/12/2021] [Indexed: 01/23/2023]
Abstract
Smokeless tobacco (SLT) consumption is presumed to be one of the major causes of high incidence of oral cancer in India. The present study aimed to document various types of SLT products consumed and their potential impact on the genome instability on the population from Assam state in Northeast India. A cross-sectional study (n = 5000) showed that 60.56 % of the study population consumed at least one of the three forms (sadagura, zarda and khaini) of SLT of which 52.0 % were only sadagura users. Genotoxicity assessment using buccal cytome assay in 240 age and sex matched volunteers revealed that except for zarda, other forms of SLT induced significantly higher incidence micronuclei in the buccal epithelial cells compared to the control individuals. Similar effects were also observed in other cytome parameters related to cell proliferation, cytokinesis defects and cell death. Significantly higher incidence of micronucleus was observed among sadagura and khaini users in lymphocyte cytokinesis-blocked micronucleus assay. The addition of lime in sadagura increased the pH and anion levels which possibly result in higher absorption and may lead to the development of cellular anomalies.
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Affiliation(s)
- Sarbani Giri
- Molecular and Cell Biology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India.
| | - Dharmeswar Barhoi
- Molecular and Cell Biology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India.
| | - Sweety Nath Barbhuiya
- Molecular and Cell Biology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India.
| | - Anirudha Giri
- Laboratory of Environmental and Human Toxicology, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India.
| | - Samrat Das
- Molecular and Cell Biology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India.
| | - Aparajita Das
- Molecular and Cell Biology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India.
| | - Salam Himika Devi
- Molecular and Cell Biology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India.
| | - Doli Talukdar
- Molecular and Cell Biology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India.
| | - Puja Upadhaya
- Molecular and Cell Biology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India.
| | - Pimily Langthasa
- Molecular and Cell Biology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India.
| | - Neelam Pandey
- Molecular and Cell Biology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India.
| | - Supriya Singh
- Molecular and Cell Biology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India.
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Kiraz A. Reply. Arch Gynecol Obstet 2016; 294:887. [PMID: 27518599 DOI: 10.1007/s00404-016-4156-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 07/03/2016] [Indexed: 10/21/2022]
Affiliation(s)
- Aslıhan Kiraz
- Department of Medical Genetics, Education and Research Hospital, Kocasinan/ Kayseri, Turkey.
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Miszczyk J, Rawojć K, Panek A, Swakoń J, Prasanna PG, Rydygier M. Response of human lymphocytes to proton radiation of 60 MeV compared to 250 kV X-rays by the cytokinesis-block micronucleus assay. Radiother Oncol 2015; 115:128-34. [PMID: 25818831 DOI: 10.1016/j.radonc.2015.03.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 03/03/2015] [Accepted: 03/05/2015] [Indexed: 11/20/2022]
Abstract
Particle radiotherapy such as protons provides a new promising treatment modality to cancer. However, studies on its efficacy and risks are relatively sparse. Using the cytokinesis-blocked micronucleus assay, we characterized response of human peripheral blood lymphocytes, obtained from health donors irradiated in vitro in the dose range: 0-4. 0 Gy, to therapeutic proton radiation of 60 MeV from AIC-144 isochronous cyclotron, by studying nuclear division index and DNA damage and compared them with X-rays. Peripheral blood lymphocytes show decreased ability to proliferate with increasing radiation doses for both radiation types, however, in contrast to X-rays, irradiation with protons resulted in a higher proliferation index at lower doses of 0.75 and 1.0 Gy. Protons are more effective in producing MN at doses above 1.75 Gy compared to X-rays. Dose-response curves for micronucleus incidence can be best described by a cubic model for protons, while for X-rays the response was linear. The differences in the energy spectrum and intracellular distribution of energy between radiation types are also apparent at the intracellular distribution of cytogenetic damage as seen by the distribution of various numbers of micronuclei in binucleated cells. Our studies, although preliminary, further contribute to the understanding of the mechanistic differences in the response of HPBL in terms of cellular proliferation and cytogenetic damage induced by protons and X-rays as well as intra-cellular distribution of energy and thus radiobiological effectiveness.
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Akyıl D, Özkara A, Erdoğmuş SF, Eren Y, Konuk M, Sağlam E. Micronucleus assay in human lymphocytes after exposure to alloxydim sodium herbicide in vitro. Cytotechnology 2015; 67:1059-66. [PMID: 25017922 DOI: 10.1007/s10616-014-9746-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 05/15/2014] [Indexed: 10/24/2022] Open
Abstract
This study evaluates the cytotoxic and genotoxic potential of alloxydim sodium using micronucleus (MN) assay, in human peripheral lymphocytes. MN assay was used to investigate the genotoxic effects of alloxydim sodium in human peripheral lymphocytes treated with 250, 500, 750, 1,000 µg/ml concentrations of alloxydim sodium for 24 and 48 h. Solvent, negative and positive controls were also used in the experiments in parallel. The obtained results were evaluated in statistical analyses by using Dunnett-t test (two sided) and p < 0.05 was accepted as significant. Alloxydim sodium significantly increased the MN formation compared with the negative control, at both 750 and 1,000 µg/ml concentrations and treatment periods. We also evaluated the nuclear division index (NDI) for cytotoxicity of this pesticide in the experiment, and finally observed a significant decrease of the NDI values at all concentrations of alloxydim sodium and at both treatment periods.
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