PDF | The cytokinesis-block micronucleus cytome (CBMN cyt) assay is a new and comprehensive technique for measuring DNA damage. DNA damage and cytotoxicity biomarkers in the lymphocyte Cytokinesis-Block Micronucleus Cytome (CBMN Cyt) assay. DNA damage biomarkers include (a). Cytokinesis-Block Micronucleus Cytome Assays for the Determination of Genotoxicity and Cytotoxicity of Cecal Water in Rats and Fecal Water.

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According to prior studies [ 16 ], increase in the frequency of MN is proportional to age. This result can be explained by the small number of cells with bridges and dicentric chromosomes. Lymphocytes of BRCA1 and BRCA2 germ-line mutation carriers, with or without breast cancer, are not abnormally sensitive to the chromosome damaging effect of moderate folate deficiency. The CBMN test is slowly replacing the analysis of chromosome aberrations in lymphocytes because the damaged cytoke markers are easy to recognise and score and the results can be obtained in a shorter time.

The majority of binucleated lymphocytes in both the control and the exposed groups had only one MN. Assau were observed in the preparations to have varying numbers of nuclei. Because NPBs are a result of chromosomal aberrations and the formation of dicentric mictonucleus polycentric chromosomes, the comparison of the values from the micronucleus test with those obtained from the analysis of chromosomal aberrations was of special interest in our study.


Cytokinesis-block micronucleus cytome assay

Cytogenetic damage in human blood lymphocytes exposed in vitro to radon. We used the following criteria to identify the micronuclei:. Email alerts New issue alert. In addition to living in the same area, all members in this study had similar diets and accommodation.

For each group, a protocol was designed and an informed consent form was signed by the parents or guardians. SFTG international collaborative study on in vitro micronucleus test I. Related articles in Web of Science Google Scholar. In addition, the exposed group also showed a significant increase in the total number of micronuclei.

MN may touch but not overlap the main nuclei, and the micronuclear boundary should be distinguishable from the nuclear boundary. The application of the cytokinesis-block micronucleus assay on peripheral blood lymphocytes for the assessment of genome damage in long-term residents of areas with high radon concentration Maxim Yu.

Cytokinesis-block micronucleus cytome assay in lymphocytes.

Necrosis is increased in lymphoblastoid cell lines from children with autism compared with their non-autistic siblings under conditions of oxidative and nitrosative stress. Development of a method for assessing micronucleus induction in a 3D human skin model EpiDerm.

The frequency of cells with MN is a key indicator of the extent of DNA damage due to exposure to various genotoxicants, including radon. In the classical cytogenetic techniques, chromosomes are studied directly by observation and by counting the aberrations in metaphase spreads.

Because MN are expressed in cells that have completed nuclear division, they can be ideally scored during the binucleated stage of the cell cycle [ 7 ].


Estimating the effects of small doses of ionising radiation on DNA is one of the most important problems in modern biology. Cytokinesis-block micronucleus assay evolves into a “cytome” assay of chromosomal instability, mitotic dysfunction and cell death.

Randa El-ZeinMatthew B. Cytone the exposed group, no statistically significant differences were observed. The supernatant was removed, the pellet was broken and 1 ml of cold, freshly prepared 0.

Cytokinesis-block micronucleus cytome assay in lymphocytes.

However, seven cells exhibited two MN and one cell exhibited three MN in the control group, while in the exposed group 12 cells exhibited two MN and three cells exhibited three MN. Characteristics of this group are presented in Table 3.

Microonucleus calculated the Spearman correlation coefficient for each of these indices, between age and the frequency of chromosomal aberrations. In addition, information regarding other cellular events such as mitotic rate and cell death by apoptosis and necrosis can be simultaneously obtained from the same slides [ 6 ]. Spitz Cancer research Citations Publications citing this paper.

Abstract Estimating the effects of small doses of ionising radiation on DNA is one of the most important problems in modern biology.

In this study we used the following formula: References Publications referenced by this paper. CitePeer Related Articles http: