Related Experiment Video
Updated: Mar 19, 2026
12:56
An Automated Method to Perform The In Vitro Micronucleus Assay using Multispectral Imaging Flow Cytometry
Published on: May 13, 2019
23.4K
Biogenesis of Micronuclei
O P Kisurina-Evgenieva1, O I Sutiagina, G E Onishchenko
1Lomonosov Moscow State University, Faculty of Biology, Moscow, 119234, Russia. evgengeva@mail.ru.
Biochemistry. Biokhimiia
|June 15, 2016
Summary
Micronuclei indicate DNA damage and genetic instability. This review explores how the chromosomal material within micronuclei influences their formation, function, and elimination.
Area of Science:
- Cell Biology
- Genetics
- Molecular Biology
Background:
- Micronuclei are key biomarkers for genotoxicity and chromosomal instability.
- Understanding micronuclei formation and fate is crucial for assessing DNA damage.
Purpose of the Study:
- To review the mechanisms underlying micronuclei emergence.
- To discuss the functional activities and elimination pathways of micronuclei.
- To explore the role of chromosomal content in micronuclei characteristics.
Main Methods:
- Literature review of studies on micronuclei formation, function, and elimination.
- Analysis of research on the relationship between chromosomal material and micronuclei properties.
Main Results:
- Micronuclei formation is linked to DNA damage and genetic instability.
- Diverse mechanisms govern micronuclei emergence, activity, and clearance.
- The chromosomal content within micronuclei dictates their morphology, function, and degradation.
Conclusions:
- Micronuclei serve as critical indicators of cellular genetic integrity.
- The composition of micronuclei influences their biological roles and cellular processing.
- Further research into micronuclei heterogeneity can advance our understanding of DNA repair and disease.
Related Concept Videos
01:23Microtubule Formation
8.0K
Microtubules are dynamic structures that undergo continuous assembly and disassembly. They originate from specialized multi-protein complexes known as microtubule organizing centers or MTOCs. Within the MTOC, the point of origin of the microtubule is known as the minus end, while the end radiating outward is the plus end. Microtubules serve two primary functions — the organization of spindle complexes to separate sister chromatids during mitotic or meiotic cell division and the formation...
8.0K
02:55The Nucleolus
10.6K
The nucleolus is the most prominent substructure of the nucleus. When it was first discovered, it was considered to be an isolated organelle that forms fibrils and granules. In 1931, the relationship between the nucleolus and chromosomes was first described by Heitz. He observed that the appearance and size of nucleolus varies depending on the stage of the cell cycle. He also noticed constricted regions on different chromosomes clustered together at definite cell cycle stages. These regions,...
10.6K
02:38Mitogens and the Cell Cycle
8.3K
Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
8.3K
02:31Chromosome Replication
11.0K
Before a cell can divide, it must accurately replicate all of its chromosomes, including the DNA and its associated histone and non-histone proteins. This process begins at numerous origins of replication during the S phase of the cell cycle in each of a cell’s chromosomes simultaneously. Certain nucleotides can act as origins of replication, but these sequences are not well defined - especially in complex, multi-cellular, eukaryotic species. The length of DNA that spans an origin...
11.0K
01:38Nucleotide Excision Repair
5.6K
DNA Distortion and Damage
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
5.6K
01:57Meiosis II
210.1K
Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each...
210.1K