PMID- 1311674 OWN - NLM STAT- MEDLINE DCOM- 19920409 LR - 20191021 IS - 0893-6692 (Print) IS - 0893-6692 (Linking) VI - 19 IP - 2 DP - 1992 TI - Nitrobenzo[a]pyrene-induced DNA amplification in SV40-transformed Chinese hamster embryo cells. PG - 156-60 AB - Nitrobenzo[a]pyrenes (NBaPs) are ubiquitous environmental pollutants that produce mutations in Salmonella typhimurium and Chinese hamster ovary cells. In this study, 1-, 3-, and 6-NBaP induced amplification of SV40 DNA sequences in an SV40-transformed Chinese hamster embryo cell line which is sensitive to DNA amplification by various known carcinogens. Of the three isomers, 3-NBaP produced the highest level of gene amplification, which was 4.8 relative to untreated controls at a dose of 5 micrograms/ml. Considering the relationship between gene amplification and tumorigenesis, it seems prudent to carry out a more exhaustive analysis of the carcinogenic potential of these agents. FAU - Neft, R E AU - Neft RE AD - Division of Genetic Toxicology, Food and Drug Administration, National Center for Toxicological Research, Jefferson, AR 72079-9502. FAU - Roe, A L AU - Roe AL FAU - Schol, H M AU - Schol HM FAU - Fu, P P AU - Fu PP FAU - Mittelstaedt, R A AU - Mittelstaedt RA FAU - Casciano, D A AU - Casciano DA LA - eng PT - Journal Article PL - United States TA - Environ Mol Mutagen JT - Environmental and molecular mutagenesis JID - 8800109 RN - 0 (Benzopyrenes) RN - 0 (DNA, Viral) RN - 0 (Mutagens) SB - IM MH - Animals MH - Benzopyrenes/*toxicity MH - Cell Line, Transformed MH - Cell Transformation, Viral/*drug effects MH - Cricetinae MH - Cricetulus MH - DNA, Viral/biosynthesis/*drug effects MH - Embryo, Mammalian/cytology MH - Gene Amplification/*drug effects MH - *Mutagens MH - Simian virus 40/*genetics/physiology EDAT- 1992/01/01 00:00 MHDA- 1992/01/01 00:01 CRDT- 1992/01/01 00:00 PHST- 1992/01/01 00:00 [pubmed] PHST- 1992/01/01 00:01 [medline] PHST- 1992/01/01 00:00 [entrez] AID - 10.1002/em.2850190210 [doi] PST - ppublish SO - Environ Mol Mutagen. 1992;19(2):156-60. doi: 10.1002/em.2850190210.