Micronucleus


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micronucleus

[¦mī·krō′nü·klē·əs]
(invertebrate zoology)
The smaller, reproductive nucleus in multinucleate protozoans.

Micronucleus

 

in infusorians, the smaller (generative) nucleus. The micronucleus is usually diploid and divides by mitosis; however, during the sexual process in infusorians (conjugation), it divides meiotically and gives rise to sexual nuclei or pronuclei. During the vegetative period, the genetic apparatus of the micronucleus remains inactive, does not synthesize ribonucleic acid, and has no influence on the phenotype of the organism.

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References in periodicals archive ?
Evaluating the genotoxocity of surface water of Yangzhong city using the Vicia faba micronucleus test and the comet assay, Bull.
An ameliorative effect of chrysanthemum indicum on doxorubicin-induced DNA damage and histopathotogical alterations in mice
To measure the chromosomal radiosensitivity of SA breast cancer patients in a case-control study design with the micronucleus assay and the Metafer 4 scoring system.
Chromosomal radiosensitivity of lymphocytes in south African breast cancer patients of different ethnicity: an indirect measure of cancer susceptibility
The results obtained by micronucleus assay showed significantly a higher frequency of erythrocyte with micronuclei, blebbed nuclei, lobed, notched, heteropicnotic nuclei, binucleated and pear shape erythrocyte.
Hemato-biochemical and Genetic Damage Caused by Triazophos in Fresh Water Fish, Labeo rohita
Sensitivity of the erythrocyte micronucleus assay: dependence on number of cells scored and inter-animal variability.
Diversity Outbred mice identify population-based exposure thresholds and genetic factors that influence benzene-induced genotoxicity
One simple and economical method for this is the micronucleus test in interphase cells (24).
Cytogenetic alterations in preimplantation mice embryos following male mouse gonadal gamma-irradiation: comparison of two methods for reproductive toxicity screening
High level but not low-level occupational exposure to inhaled anesthetics is associated with genotoxicity in the micronucleus assay.
Genotoxicidad y citotoxicidad del sevoflurane en dos lineas celulares humanas in vitro con radiacion ionizante
triacum Buisson, 1923, but the shape of macronucleus and the location of micronucleus are different.
New Rumen Ciliate, Entodinium kastamonicum, New Species (Ophryoscolecidae: Entodiniomorphida) from Turkish Domestic Cattle, Bos taurus Taurus
Arnaboldi, "Human lymphocyte micronucleus genotoxicity test with mixtures of phytochemicals in environmental concentrations," Mutation Research--Genetic Toxicology and Environmental Mutagenesis, vol.
Protective effects of quercetin against dimethoate-induced cytotoxicity and genotoxicity in Allium sativum test
Validation of the mouse peripheral blood micronucleus assay using acridine orange supravital staining with urethane.
El cerdo joven como bioindicador de concentraciones bajas de genotoxicos mediante eritrocitos micronucleados
The Human MicroNucleus Project: an international collaborative study on the use of micronucleus technique for measuring DNA damage in humans.
Micronucleus analysis in Behqet's disease with and without HLA-B51/HLA-B51 pozitif ve negatif Behcet hastaliginda mikronukleus analizi
6) The micronucleus test detects mutagenic substances that break chromosomes (clastogenic substances) or that interfere with mitotic spindle formation, thus altering the equitable distribution of chromosomes during cell division.
Assessment of methyl methacrylate genotoxicity by the micronucleus test
The Reconstructed Skin Micronucleus (RSMN) Assay is the first commercial offering of a Genetic Toxicology assay using three-dimensional tissue models.
BioReliance launches 3D skin assay

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