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Mutagenicity and cytotoxicity of reactive oxygen and nitrogen species in the MN-11 murine tumor cell line.
- Source :
-
Mutation research [Mutat Res] 1997 Oct 06; Vol. 379 (2), pp. 241-52. - Publication Year :
- 1997
-
Abstract
- There is increasing evidence that endogenously generated reactive oxygen (ROS) and reactive nitrogen (RNS) species at sites of inflammation and in tumors may be genotoxic. We have developed a murine tumor model (MN-11) in which mutations at the hypoxanthine phosphoribosyltransferase (HPRT) locus, arising both in vitro and in vivo, can be detected. In the present report, we describe an in vitro study of the ability of ROS and RNS to induce mutations in our model system. 137Cs radiation and radiomimetic drugs caused a dose-dependent increase in mutant frequency. At D0, radiation induced about 170 mutants per 10(5) viable cells, compared to 50 and 95 for streptonigrin and bleomycin, respectively. H2O2 induced a lower frequency of mutants, 20-30 per 10(5), for enzymatically generated or bolus, respectively. For the following treatments, mutant frequency at 50% survival is shown. Incubation with human granulocytes induced a low frequency of mutants (about 15 per 10(5)). RNS was tested using a series of NO-donating drugs. Spermine/NO. induced cytotoxicity but no mutants while S-nitroso-N-acetylpenicillamine induced a low level, 10 per 10(5). Both release nitrogen monoxide spontaneously, with a t1/2 < 3 h. Glyceryl trinitrate and sodium nitroprusside are two drugs that were slowly metabolized by MN-11 cells (> 12 h). Glyceryl trinitrate induced about 20 per 10(5) while nitroprusside induced 50 per 10(5). Our results indicate that RNS can readily induce mutations detectable in MN-11 cells. At equicytotoxic doses, the induced mutant frequency varied considerably for different drugs, suggesting that different states of nitrogen monoxide (such as NO+ or NO.) may be generated and these may vary in their mutagenic/cytotoxic potential.
- Subjects :
- Animals
Bleomycin toxicity
Cells, Cultured
Cyanides
Gamma Rays
Granulocytes drug effects
Humans
Hydrogen Peroxide toxicity
Hypoxanthine Phosphoribosyltransferase genetics
Mice
Mutagens pharmacology
Mutagens toxicity
Nitroglycerin pharmacology
Nitroprusside pharmacology
Penicillamine analogs & derivatives
Penicillamine pharmacology
Penicillamine toxicity
S-Nitroso-N-Acetylpenicillamine
Spermine pharmacology
Streptonigrin toxicity
Thiosulfate Sulfurtransferase pharmacology
Thiosulfates pharmacology
Tumor Cells, Cultured
Mutagenicity Tests methods
Nitric Oxide physiology
Reactive Oxygen Species
Subjects
Details
- Language :
- English
- ISSN :
- 0027-5107
- Volume :
- 379
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Mutation research
- Publication Type :
- Academic Journal
- Accession number :
- 9357553
- Full Text :
- https://doi.org/10.1016/s0027-5107(97)00140-1