PMID- 3173402 OWN - NLM STAT- MEDLINE DCOM- 19881117 LR - 20190702 IS - 0027-5107 (Print) IS - 0027-5107 (Linking) VI - 209 IP - 1-2 DP - 1988 Sep-Oct TI - Differential effects induced by N-hydroxy-2-acetylaminofluorene and N-hydroxy-2-aminofluorene in DNA excision-repair-deficient Chinese hamster cells. PG - 45-50 AB - The direct-acting cytotoxic properties of N-hydroxy-2-acetylaminofluorene (N-OH-AAF) and N-hydroxy-2-aminofluorene (N-OH-AF) have been determined in repair-proficient (AA8-4) and repair-deficient (UV-5) Chinese hamster ovary cells. Cytotoxicity comparisons indicate that UV-5 cells are considerably more sensitive to exposure to N-OH-AAF than is the parental AA8-4 cell line, i.e., concentrations needed to obtain a D37 for survival of AA8-4 is greater than 5-fold higher than for UV-5. Mutation analysis at the HGPRT locus also indicates the increased sensitivity of UV-5 cells to N-OH-AAF as witnessed by an enhanced induction of 6-thioguanine-resistant colonies at equitoxic doses. Conversely, N-OH-AAF, did not induce a 'UV-mimetic' response when comparing genotoxicity between these two cell lines. Our data coupled with previously published model-building and adduct removal studies (Broyde and Hingerty, 1983; Fuchs and Daune, 1974; Grunberger and Weinstein, 1976; Yamasaki et al., 1977) suggest that the minor DNA adduct species, N-(2'-deoxyguanosin-8-yl)-2-acetylaminofluorene, may be responsible for the hypermutagenicity witnessed in DNA excision-repair-deficient cells treated with N-OH-AAF. FAU - Okinaka, R T AU - Okinaka RT AD - Life Sciences Division, Los Alamos National Laboratory, NM 87545. FAU - Whaley, T W AU - Whaley TW FAU - Strniste, G F AU - Strniste GF LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. PL - Netherlands TA - Mutat Res JT - Mutation research JID - 0400763 RN - 0 (Fluorenes) RN - 53-95-2 (Hydroxyacetylaminofluorene) RN - 61M94X4V24 (N-hydroxy-2-aminofluorene) RN - 9M98QLJ2DL (2-Acetylaminofluorene) SB - IM MH - 2-Acetylaminofluorene/*analogs & derivatives MH - Animals MH - Cell Division/drug effects MH - Cricetinae MH - *DNA Repair MH - Fluorenes/*toxicity MH - Hydroxyacetylaminofluorene/*toxicity MH - Mutation/*drug effects MH - Ultraviolet Rays EDAT- 1988/09/01 00:00 MHDA- 1988/09/01 00:01 CRDT- 1988/09/01 00:00 PHST- 1988/09/01 00:00 [pubmed] PHST- 1988/09/01 00:01 [medline] PHST- 1988/09/01 00:00 [entrez] AID - 0165-7992(88)90109-1 [pii] AID - 10.1016/0165-7992(88)90109-1 [doi] PST - ppublish SO - Mutat Res. 1988 Sep-Oct;209(1-2):45-50. doi: 10.1016/0165-7992(88)90109-1.