title: An approach for evaluating and increasing the informational content of mutagenicity and clastogenicity data bases.
abstract: A method is described for using the fragments identified by the CASE structure-activity relational expert system to identify the type of chemicals that require further testing in mutagenicity and clastogenicity assays. Inclusion of such chemicals will increase the informational content of databases with respect to structural features that are under-represented in currently available data bases. The method is applied to existing databases (mutagenicity in Salmonella, chromosomal aberrations in Chinese hamster ovary cells, unscheduled DNA synthesis in rat hepatocytes, in vivo induction of micronuclei, somatic mutations in Drosophila melanogaster) to identify structural determinants that are absent.
authors.affiliation: Department of Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, PA 15261.
authors.forename: N
authors.initials: N
authors.lastname: Takihi
authors.forename: Y P
authors.initials: YP
authors.lastname: Zhang
authors.forename: G
authors.initials: G
authors.lastname: Klopman
authors.forename: H S
authors.initials: HS
authors.lastname: Rosenkranz
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry / Q000633:toxicity; D000818:Animals; D016466:CHO Cells; D002869:Chromosome Aberrations; D006224:Cricetinae; D004260:DNA Repair / Q000187:drug effects; D016206:Databases, Bibliographic; D004331:Drosophila melanogaster / Q000187:drug effects / Q000235:genetics; D008099:Liver / Q000187:drug effects / Q000378:metabolism; D015162:Micronucleus Tests; D015394:Molecular Structure; D009025:Morpholines / Q000737:chemistry / Q000633:toxicity; D016296:Mutagenesis; D009152:Mutagenicity Tests; D009153:Mutagens / Q000737:chemistry / Q000633:toxicity*; D009570:Nitriles / Q000737:chemistry / Q000633:toxicity; D009574:Nitro Compounds / Q000737:chemistry / Q000633:toxicity; D009602:Nitrosamines / Q000737:chemistry / Q000633:toxicity; D009603:Nitroso Compounds / Q000737:chemistry / Q000633:toxicity; D010797:Phthalimides / Q000737:chemistry / Q000633:toxicity; D011799:Quinazolines / Q000737:chemistry / Q000633:toxicity; D051381:Rats; D012486:Salmonella typhimurium / Q000187:drug effects; D013329:Structure-Activity Relationship; D013449:Sulfonamides
chemical_list: D000814:Aniline Compounds; D009025:Morpholines; D009153:Mutagens; D009570:Nitriles; D009574:Nitro Compounds; D009602:Nitrosamines; D009603:Nitroso Compounds; D010797:Phthalimides; D011799:Quinazolines; D013449:Sulfonamides; C036591:tetramethylsuccinonitrile; C082212:5-pentyl-N-nitrosomorpholine; C002741:N-nitrosomorpholine; C050700:quinethazone; C015157:N,N-dimethylaniline; C082211:4-nitrophthalimide