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Micronucleus Assay: The State of Art, and Future Directions
Sylwester Sommer1, Iwona Buraczewska1, Marcin Kruszewski1,2
1Centre for Radiobiology and Biological Dosimetry, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warszawa, Poland.
Abstract:
During almost 40 years of use, the micronucleus assay (MN) has become one of the most popular methods to assess genotoxicity of different chemical and physical factors, including ionizing radiation-induced DNA damage. In this minireview, we focus on the position of MN among the other genotoxicity tests, its usefulness in different applications and visibility by international organizations, such as International Atomic Energy Agency, Organization for Economic Co-operation and Development and International Organization for Standardization. In addition, the mechanism of micronuclei formation is discussed. Finally, foreseen directions of the MN development are pointed, such as automation, buccal cells MN and chromothripsis phenomenon.
Insights
The micronucleus assay (MN) is a popular genotoxicity test for DNA damage from radiation and chemicals. This review covers its applications, international recognition, and future developments like automation and buccal cell analysis.
Area of Science:
- Toxicology
- Genetics
- Molecular Biology
Background:
- The micronucleus assay (MN) has been a widely adopted method for nearly 40 years.
- It is extensively used to evaluate genotoxicity induced by various chemical and physical agents.
- Ionizing radiation-induced DNA damage is a key area where MN assays are applied.
Purpose of the Study:
- To review the position of the MN assay relative to other genotoxicity testing methods.
- To highlight the assay's versatility across different applications.
- To discuss the MN assay's recognition by international bodies like the IAEA, OECD, and ISO.
Main Methods:
- Review of existing literature on the micronucleus assay.
- Analysis of the MN assay's role in genotoxicity testing.
- Discussion of micronuclei formation mechanisms.
Main Results:
- The MN assay is a prominent method for assessing genotoxicity.
- It holds significant visibility and acceptance among international organizations.
- The review details the mechanisms underlying micronuclei formation.
Conclusions:
- The MN assay is a valuable tool for genotoxicity assessment with broad international recognition.
- Future directions include automation, application to buccal cells, and understanding chromothripsis.
- Continued development will enhance the assay's utility in toxicology and radiation research.
