Evaluation of the rat micronucleus test with bone marrow and peripheral blood: Summary of the 9th collaborative study by CSGMT/JEMS·MMS
| Autor: | Takumi Awogi, Akihiro Wakata, Takayoshi Suzuki, Takeshi Morita, Koji Kondo, Makoto Hayashi, Norihide Asano, Youichi Miyamae, Sei-ichi Sato |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Pathology
medicine.medical_specialty Epidemiology Health Toxicology and Mutagenesis Acridine orange Biology Peripheral blood Staining chemistry.chemical_compound medicine.anatomical_structure chemistry Toxicity Micronucleus test Immunology medicine Rat Spleen Bone marrow Genetics (clinical) Carcinogen |
| Zdroj: | Environmental and Molecular Mutagenesis. 32:84-100 |
| ISSN: | 1098-2280 0893-6692 |
| Popis: | The mouse has traditionally been used for the micronucleus test, with bone marrow the usual target organ. The aim of the 9th collaborative study by CSGMT was to evaluate the suitability of the rat for the micronucleus test, with bone marrow and peripheral blood as the target organ. Since the rat spleen eliminates circulating micronucleated erythrocytes, a rat peripheral blood micronucleus assay might not be feasible. Thirty-four Japanese laboratories and six overseas laboratories participated in this collaboration, and 40 chemicals were studied. As a rule, rat bone marrow and peripheral blood were analyzed using acridine orange staining. Among 36 mouse micronucleus-positive rat carcinogens, 34 of which had been evaluated by CSGMT, we observed 33 positive and three negative results with rat bone marrow and 30 positive, three equivocal, and three negative responses with rat peripheral blood. Of the two mouse micronucleus-negative rat carcinogens, acrylonitrile was positive in rat bone marrow and 4,4'-methylene bis(2-chloroaniline) was negative in both rat bone marrow and peripheral blood. Two chemicals reported to be mouse micronucleus-negative and rat-positive, azobenzene and Solvent Yellow 14, and one chemical reported to be mouse-positive and rat-negative, 1,2-dimethylhydrazine, gave positive responses in rat bone marrow and peripheral blood. The concordance between bone marrow and peripheral blood with rats was 92%. The concordance between rat and mouse erythrocytes was 88%. We concluded that the rat micronucleus assay, using either bone marrow or peripheral blood, can be used as an alternative to the mouse micronucleus assay. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text