Results 61 to 70 of about 53,897 (283)

Interpretation of in vitro concentration‐response data for risk assessment and regulatory decision‐making: Report from the 2022 IWGT quantitative analysis expert working group meeting

Environmental and Molecular Mutagenesis, EarlyView.
Abstract Quantitative risk assessments of chemicals are routinely performed using in vivo data from rodents; however, there is growing recognition that non‐animal approaches can be human‐relevant alternatives. There is an urgent need to build confidence in non‐animal alternatives given the international support to reduce the use of animals in toxicity ...
Marc A. Beal, Guangchao Chen, Kerry L. Dearfield, Min Gi, Bhaskar Gollapudi, Robert H. Heflich, Katsuyoshi Horibata, Alexandra S. Long, David P. Lovell, Barbara L. Parsons, Stefan Pfuhler, John Wills, Andreas Zeller, George Johnson, Paul A. White   +14 more
wiley   +1 more source

Seed viability, germination and seedling growth of canola (Brassica napus L.) as influenced by chemical mutagens [PDF]

, 2013
Mutation induction is considered as an effective way to enrich plant genetic variation, particularly for traits with a very low level of genetic variation. The objectives of this study were to evaluate the effect of different dosages of chemical mutagens
Arzani, A, Emrani, SN, Saeidi, G
core   +2 more sources

Severity of effect considerations regarding the use of mutation as a toxicological endpoint for risk assessment: A report from the 8th International Workshop on Genotoxicity Testing (IWGT)

Environmental and Molecular Mutagenesis, EarlyView.
Abstract Exposure levels without appreciable human health risk may be determined by dividing a point of departure on a dose–response curve (e.g., benchmark dose) by a composite adjustment factor (AF). An “effect severity” AF (ESAF) is employed in some regulatory contexts.
Barbara L. Parsons, Marc A. Beal, Kerry L. Dearfield, George R. Douglas, Min Gi, B. Bhaskar Gollapudi, Robert H. Heflich, Katsuyoshi Horibata, Michelle Kenyon, Alexandra S. Long, David P. Lovell, Anthony M. Lynch, Meagan B. Myers, Stefan Pfuhler, Alisa Vespa, Andreas Zeller, George E. Johnson, Paul A. White   +17 more
wiley   +1 more source

Detection of carcinogens as mutagens in the Salmonella/microsome test: assay of 300 chemicals: discussion.

Proceedings of the National Academy of Sciences of the United States of America, 1976
About 300 carcinogens and non-carcinogens of a wide variety of chemical types have been tested for mutagenicity in the simple Salmonella/microsome test.
J. McCann, B. Ames
semanticscholar   +1 more source

Epigenotoxicity: Decoding the epigenetic imprints of genotoxic agents and their implications for regulatory genetic toxicology

Environmental and Molecular Mutagenesis, EarlyView.
Abstract Regulatory genetic toxicology focuses on DNA damage and subsequent gene mutations. However, genotoxic agents can also affect epigenetic marks, and incorporation of epigenetic data into the regulatory framework may thus enhance the accuracy of risk assessment.
Roger Godschalk, Christopher Faulk, Jessica LaRocca, Jan van Benthem, Francesco Marchetti   +4 more
wiley   +1 more source

Nonmutagenic carcinogens induce intrachromosomal recombination in dividing yeast cells. [PDF]

, 1993
A large number of animal and human carcinogens without apparent genotoxic activity exist (nonmutagenic carcinogens) that are difficult or impossible to detect with the currently used short-term tests.
Schiestl, RH
core   +2 more sources

Antimutagenic effect of ellagic acid and its effect on the immune response in mice

Czech Journal of Food Sciences, 2002
Using the Ames bacterial mutagenicity test and an in vivo micronucleus test, we investigated the antigenotoxic effect of ellagic acid on the genotoxicity of three mutagens: amino-methylimidazo-quinoline (IQ), aflatoxin B1 (AFB1), and N-nitroso-N ...
P. Šmerák, H. Šestáková, Z. Polívková, I. Bárta, B. Turek, J. Bártová, M. Langová, M. Anděl   +7 more
doaj   +1 more source

Use of high throughput sequencing to observe genome dynamics at a single cell level [PDF]

, 2009
With the development of high throughput sequencing technology, it becomes possible to directly analyze mutation distribution in a genome-wide fashion, dissociating mutation rate measurements from the traditional underlying assumptions. Here, we sequenced several genomes of Escherichia coli from colonies obtained after chemical mutagenesis and observed ...
arxiv   +1 more source

Meat-cooking mutagens and risk of renal cell carcinoma

British Journal of Cancer, 2011
Background:High-temperature cooked meat contains two families of carcinogens, heterocyclic amines (HCAs) and polycyclic aromatic hydrocarbons (PAHs). Given the kidneys’ role in metabolism and urinary excretion of these compounds, we investigated meat ...
C. Daniel, K. Schwartz, J. Colt, Linda M. Dong, J. Ruterbusch, M. Purdue, A. Cross, N. Rothman, F. Davis, S. Wacholder, B. Graubard, W. Chow, R. Sinha   +12 more
semanticscholar   +1 more source

Consensus findings of an International Workshops on Genotoxicity Testing workshop on using transcriptomic biomarkers to predict genotoxicity

Environmental and Molecular Mutagenesis, EarlyView.
Abstract Gene expression biomarkers have the potential to identify genotoxic and non‐genotoxic carcinogens, providing opportunities for integrated testing and reducing animal use. In August 2022, an International Workshops on Genotoxicity Testing (IWGT) workshop was held to critically review current methods to identify genotoxicants using ...
Roland Froetschl, J. Christopher Corton, Henghong Li, Jiri Aubrecht, Scott S. Auerbach, Florian Caiment, Tatyana Y. Doktorova, Yurika Fujita, Danyel Jennen, Naoki Koyama, Matthew J. Meier, Roman Mezencev, Leslie Recio, Takayoshi Suzuki, Carole L. Yauk   +14 more
wiley   +1 more source