Abstract:
:N-Hydroxymethylacrylamide (NHMA), a mouse carcinogen inactive in the Salmonella assay and mouse micronucleus (MN) assay, was tested for reproductive effects in a mouse continuous breeding study. In that study, increased embryonic deaths were observed after 13 weeks exposure of parental animals to NHMA via drinking water (highest dose, 360 ppm); the results indicated the possible induction of chromosome damage in germ cells of treated males. An additional mouse MN test was conducted using a 31-day treatment period to better match the dosing regimen used in the breeding study; the results were negative. Additional studies were conducted to explore the germ cell activity of NHMA. A male mouse dominant lethal study was conducted using a single intraperitoneal injection of 150 mg/kg NHMA; the results were negative. A follow-up study was conducted using fractionated dosing, 50 mg/kg/day for 5 days; again, no increase in dominant lethal mutations was observed. NHMA (180-720 ppm) was then administered to male mice in drinking water for 13 weeks, during which three sets of matings occurred. Two weeks after mating, females were killed and the uterine contents were analyzed. Large, dose-related increases in dominant lethal mutations were observed with increasing length of exposure. The magnitude of the increases stabilized after 8 weeks of treatment. However, the frequency of micronucleated peripheral blood erythrocytes was not elevated in mice treated for 13 weeks with NHMA in drinking water. Thus, NHMA appears to be unique in inducing genetic damage in germ cells but not somatic cells of male mice.
journal_name
Environ Mol Mutagenjournal_title
Environmental and molecular mutagenesisauthors
Witt KL,Hughes LA,Burka LT,McFee AF,Mathews JM,Black SL,Bishop JBdoi
10.1002/em.10139subject
Has Abstractpub_date
2003-01-01 00:00:00pages
111-20issue
2eissn
0893-6692issn
1098-2280journal_volume
41pub_type
杂志文章abstract::DAS (diallyl sulfide), DADS (diallyl disulfide), and DATS (diallyl trisulfide) are major oil-soluble allyl sulfides (OAS) that represent major garlic constituents. The anticarcinogenic and antimutagenic effects of these substances have been extensively studied during the last decades. Previous reports suggest that ind...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20467
更新日期:2009-04-01 00:00:00
abstract::Malignant gliomas are heterogeneous populations of dynamically interacting cells. Genomic and transcriptional changes define this cellular hierarchy and allow certain tumor cells to co-opt metabolic machinery and adopt gene expression profiles that promote cellular reprogramming. Resultant expansion of privileged subp...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.21988
更新日期:2016-06-01 00:00:00
abstract::To protect human and ecosystem health, it is necessary to develop sensitive assays and to identify responsive cells and species (and their life stages). In this study, the relative genotoxicity of two inorganic arsenicals: trivalent sodium arsenite (As(3+)) and pentavalent sodium arsenate (As(5+)), was evaluated in tw...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20027
更新日期:2004-01-01 00:00:00
abstract::The in vivo model Drosophila melanogaster was used here to determine the detrimental effects induced by silver nanoparticles (AgNPs) exposure. The main aim was to explore its interaction with the intestinal barrier and the genotoxic effects induced in hemocytes. The observed effects were compared with those obtained b...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.22262
更新日期:2019-04-01 00:00:00
abstract::To what extent noncovalent chemical-DNA interactions, in particular weak nonbonded DNA intercalation, contribute to genotoxic responses in mammalian cells has not been fully elucidated. Moreover, with the exception of predominantly flat, multiple-fused-ring structures, our ability to predict intercalation ability of n...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20036
更新日期:2004-01-01 00:00:00
abstract::We evaluated the effects of urban air pollutants on human nasal mucosa over an 8-month period on 102 subjects living in Florence, Tuscany, Italy. A group of subjects living in a city with a lower level of pollution (Sassari, Sardinia, Italy) was also analyzed. Nasal mucosa cells were harvested by brushing, a noninvasi...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.10188
更新日期:2003-01-01 00:00:00
abstract::To evaluate whether blood-based genotoxicity endpoints can provide temporal and dose-response data within the low-dose carcinogenic range that could contribute to carcinogenic mode of action (MoA) assessments, we evaluated the sensitivity of flow cytometry-based micronucleus and Pig-a gene mutation assays at and below...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.21846
更新日期:2014-05-01 00:00:00
abstract::The genotoxic responses of mixtures of four chlorohydroxyfuranones (CHFs), 3-chloro-4-(dichloromethyl)-5-hydroxy-2(5H)-furanone (MX), 3,4-dichloro-5-hydroxy-2(5H)-furanone (MCA), 3-chloro- 4-(chloromethyl)-5-hydroxy-2(5H)-furanone (CMCF) and 3-chloro-4-methyl-5-hydroxy-2(5H)-furanone (MCF), were compared with the geno...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20017
更新日期:2004-01-01 00:00:00
abstract::The Ames Salmonella/microsomal assay was employed to test the mutagenicity of some benzamines (aniline, and o- and p-phenylenediamine) and their nitro-derivatives (p-nitroaniline, 2-nitro-p-phenylenediamine, 3- and 4-nitro-o-phenylenediamine), using strains TA98 and TA100 and their nitroreductase-deficient mutants, TA...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/(SICI)1098-2280(1996)27:1<67::AID-EM9>3.0.
更新日期:1996-01-01 00:00:00
abstract::The placenta is a readily available source of material for molecular epidemiological investigations. As such, DNA damage in this tissue can be indicative of maternal exposure to environmental pollutants such as polycyclic aromatic hydrocarbons (PAHs). Previous reports have demonstrated that (32)P-postlabeling (PPL) is...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/1098-2280(2000)36:4<274::aid-em3>3.0.co;2-
更新日期:2000-01-01 00:00:00
abstract::Molybdenum is an essential element in plants and animals as a cofactor for enzymes. Molybdenum trioxide is used in metallurgical processes, in cosmetics as a pigment, and in contact lens solution, yet limited information is available on molybdenum genotoxicity. In the present study the micronucleus (MN) assay in human...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/(sici)1098-2280(1998)32:3<251::aid-em8>3.0
更新日期:1998-01-01 00:00:00
abstract::It is known that N-nitrosopyrrolidine (NPYR), a carcinogen in rodents, is metabolically activated by microsomal cytochrome P450 to form an alpha-hydroxylated derivative, which induces mutations. The mutations have been demonstrated by use of Salmonella typhimurium and Escherichia coli. We discovered directly acting mu...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:
更新日期:1999-01-01 00:00:00
abstract::We describe an in vivo mutagenesis model that utilizes reverse mutation and forward mutation at the endogenous Aprt locus. Reverse mutation provides an in situ method for detecting environments or agents that cause point mutations. Forward mutation detects large chromosomal events, including mitotic recombination, chr...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/(SICI)1098-2280(1996)28:4<471::AID-EM25>3.
更新日期:1996-01-01 00:00:00
abstract::311 chemicals were tested under code, for mutagenicity, in Salmonella typhimurium; 35 of the chemicals were tested more than once in the same or different laboratories. The tests were conducted using a preincubation protocol in the absence of exogenous metabolic activation, and in the presence of liver S-9 from Aroclo...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.2850190603
更新日期:1992-01-01 00:00:00
abstract::DNA damage and its subsequent repair occur heterogeneously throughout the genome, which reflects the nature of the damaging agents, gross chromosomal structure, the specific nucleotide sequence, and transcriptional status. We selected to investigate the repair of DNA damage in an artificial, transgenic situation. Here...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:
更新日期:1999-01-01 00:00:00
abstract::Fluorescence in situ hybridization with 7, 17, X, and Y chromosome-specific DNA probe was used to investigate the ability of Adriamycin (AM) to induce aneuploidy in interphase human lymphocytes. The reliability of the probes was tested by hybridization to metaphases and interphase nuclei of untreated normal lymphocyte...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/(sici)1098-2280(1999)33:2<161::aid-em8>3.0
更新日期:1999-01-01 00:00:00
abstract::National and international regulatory agencies historically have used genotoxicity information as part of a weight-of-evidence approach to evaluate potential human carcinogenicity. Additionally, some agencies consider heritable mutation a regulatory endpoint. Furthermore, genotoxicity has the potential to contribute t...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章,评审
doi:10.1002/em.20216
更新日期:2006-06-01 00:00:00
abstract::Therapy-related leukemia has been a recognized sequela of cancer treatment for decades with "signature" abnormalities of chromosomes 5, 7, and 11 observed in treated patients. Risk to oncology personnel handling anti-cancer agents has also been documented by non-specific measures of genotoxicity in blood and urine. Us...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.21852
更新日期:2014-05-01 00:00:00
abstract::Chromosome aberrations can occur by secondary mechanism(s) associated with cytotoxicity, induced by chemicals that do not attack DNA. Aberrations are formed from DNA double-strand breaks, and DSBs are known to be induced by nonmutagenic (Ames test negative) noncarcinogens at toxic levels [Storer et al. (1996): Mutat R...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract::Synthetic dyes are released in wastewater from textile manufacturing plants, and many of these dyes are genotoxic. In the present study, the mutagenicity of azo, anthraquinone, and triphenyl methane dyes was investigated before and after successive biodegradation with activated sludge and the ligninolytic fungus, Irpe...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20224
更新日期:2006-08-01 00:00:00
abstract::Diesel exhaust (DE) is a major airborne pollutant of urban areas. It contains various polycyclic aromatic hydrocarbons (PAH) and nitrated PAHs. In this study, gpt delta mice were treated with inhalation of 1 or 3 mg m(-3) DE, or a single intratracheal instillation of diesel exhaust particles (DEP) or DEP extract. In t...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20335
更新日期:2007-10-01 00:00:00
abstract::Animal studies have linked perinatal bisphenol A (BPA) exposure to altered DNA methylation, but little attention is given to analyzing multiple physiologically relevant doses. Utilizing the viable yellow agouti (A(vy)) mouse, we examine the effects of developmental exposure through maternal diet to 50 ng BPA/kg (n = 1...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.21692
更新日期:2012-06-01 00:00:00
abstract::The genome is programmed by the epigenome. Two of the fundamental components of the epigenome are chromatin structure and covalent modification of the DNA molecule itself by methylation. DNA methylation patterns are sculpted during development and it has been a long held belief that they remain stable after birth in s...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章,评审
doi:10.1002/em.20357
更新日期:2008-01-01 00:00:00
abstract::We have applied the alkaline comet assay to study the functional impact of gene polymorphisms in base excision repair (APEX1 Asp148Glu, XRCC1 Arg194Trp, XRCC1 Arg399Gln) and homologous recombination repair (XRCC3 Thr241Met, NBS1 Glu185Gln), two pathways that play crucial roles in the repair of DNA damage induced by me...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20415
更新日期:2008-12-01 00:00:00
abstract::Micronuclei were assessed among the bone marrow PCEs of mice 28 hr after exposures to 1 to 8 Gy of X-rays and at 6-hr intervals from 12-60 hr after exposures to 2 or 6 Gy. At 28 hr, the frequency of micronuclei declined as the exposure level increased from 1 to 8 Gy. The peak proportion of micronucleated PCEs appeared...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.2850230209
更新日期:1994-01-01 00:00:00
abstract::Exposure to inorganic arsenic increases the risk of basal cell carcinoma (BCC). Arsenic metabolism is a susceptibility factor for arsenic toxicity, and specific haplotypes in arsenic (+3 oxidation state) methyltransferase (AS3MT) have been associated with increased urinary fractions of the most toxic arsenic metabolit...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.21896
更新日期:2015-01-01 00:00:00
abstract::Non-isotopic in situ hybridization using a mouse gamma (major) satellite probe DNA was applied to detect centromeres in micronuclei, which were induced in vitro in mouse liver cells by ionizing radiation and by vinblastine sulfate. In a cytokinesis-blocked micronucleus assay a dose-dependent induction of micronuclei w...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.2850190102
更新日期:1992-01-01 00:00:00
abstract::There is scientific and regulatory interest in using mutation assays in transgenic mice in safety assessments for new chemicals and drugs. Currently these assays are in the process of being validated, and protocols for routine testing are being defined. Some of the issues and results to date with regard to assay valid...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章,评审
doi:10.1002/em.2850250309
更新日期:1995-01-01 00:00:00
abstract::Interactions between bleomycin (BLM) and conventional or unconventional intercalating agents were analyzed in an assay for mitotic gene conversion at the trp5 locus and reversion of the ilv1-92 allele in Saccharomyces cerevisiae strain D7. BLM is a potent recombinagen and mutagen in the assay. Various chemicals modula...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20592
更新日期:2011-03-01 00:00:00
abstract::Oxidative damage (lipid peroxidation, LPO) induced in a completely defined system containing glutathione (GSH), purified gamma-glutamyl transpeptidase (GGT), and EDTA- and ADP-chelated ferric iron was enhanced by catalytic amounts of cupric ions and by ceruloplasmin (CP). The enhancement depended on GSH concentration,...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/(sici)1098-2280(1997)29:1<73::aid-em10>3.0
更新日期:1997-01-01 00:00:00