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RECORD NUMBER: 23 OF 53

OLS Field Name OLS Field Data
Main Title Genetic Assay for Aneuploidy: Quantitation of Chromosome Loss Using a Mouse/Human Monochromosomal Hybrid Cell Line (Journal Version).
Author Sandhu, S. S. ; Gudi, R. ; Athwal, R. S. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC. Genetic Toxicology Div. ;New Jersey Medical School, Newark.
Publisher c1988
Year Published 1988
Report Number EPA/600/J-88/206;
Stock Number PB89-144489
Additional Subjects Bioassay ; Chromosome abnormalities ; Mice ; Humans ; Eschericea coli ; Reprints ; Aneuploidy ; Chromosome losses ; Toxic hazards ; Nocodazole ; Hybridomas ; Animal cells ; Genetic effects ; Hypoxanthine guanine phosphoribosyltransferase (HGPRT) ; Thioguanine ; Colcemid
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Status
NTIS  PB89-144489 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/08/1989
Collation 10p
Abstract
A genetic assay is described in which a mouse/human hybrid cell line R3-5 containing a single human chromosome (a monochromosomal hybrid) is used to detect chemically induced aneuploidy. The hybrid cells are deficient in hypoxanthine guanine phosphoribosyltransferase (HGPRT) and contain human chromosome 2, marked with Ecogpt, an E. coli gene for xanthine guanine phosphoribosyltransferase. These cells with a genotype of HGPRT(sup -)/Ecogpt (sup +) can grow in the medium containing mycophenolic acid and xanthine (MX medium) but not in the medium containing 6-thioguanine (6-TG). The loss of the human chromosome from R3-5 cells as a result of chemical treatment produces cells with a genotype of HGPT(sup -)/Ecogpt(sup -) which are capable of growth in the medium containing 6-TG. Thus, the cloning efficiency of cells treated with a test chemical in 6-TG provides a method to determine the frequency of cells that have lost the human chromosome. Colcemid and nocodazole, known to induce aneuploidy at concentrations ranging from 0.002 to 0.032 micrograms/ml, showed a concentration-related positive response in this assay.(Copyright (c) 1988 Elsevier Science Publishers B.V.)