Related Experiment Video
Updated: Aug 12, 2026
14:45
Transgenic Rodent Assay for Quantifying Male Germ Cell Mutant Frequency
Published on: August 6, 2014
[The modifications of mutagenesis and anticarcinogenesis]
Vestnik Rossiiskoi Akademii Meditsinskikh Nauk
|January 1, 1993
Summary
This study explores anticarcinogenesis by examining multistage carcinogenesis mechanisms. It highlights promising agents like nitrosation modifiers and dietary sorbents for cancer prevention, emphasizing effective screening methods.
Area of Science:
- Oncology
- Molecular Biology
- Toxicology
Context:
- Discusses anticarcinogenesis within the framework of mechanistic approaches.
- Highlights the complex, multistage nature of carcinogenesis involving extra- and intracellular events.
- Addresses the challenges in identifying effective cancer prevention strategies.
Purpose:
- To review and discuss mechanistic approaches to anticarcinogenesis.
- To identify promising agents and strategies for suppressing chemical carcinogenesis.
- To evaluate the suitability of mutagenicity and anticarcinogenesis bioassays for agent screening.
Summary:
- Reviews multistage carcinogenesis mechanisms and related molecular events.
- Identifies key classes of anticarcinogenic agents, including nitrosation modifiers, dietary sorbents, metabolic modulators, and gene expression inhibitors.
- Recommends short-term mutagenicity tests for screening anticarcinogenic agents and emphasizes the need for sensitive, specific, and predictive anticarcinogenesis bioassays.
Impact:
- Provides a comprehensive overview of anticarcinogenesis strategies.
- Guides the selection and development of novel cancer prevention agents.
- Informs the design of more effective screening protocols for potential anticancer drugs.
Related Concept Videos
01:39Mutations
Overview
01:16In-vitro Mutagenesis
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
01:16In vitro Mutagenesis
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
01:35Mutations
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
01:25Mutagenicity and Carcinogenicity
Mutagenicity and carcinogenicity refer to the ability of drugs to cause genetic defects and induce cancer, respectively. The International Agency for Research on Cancer (IARC) classifies agents into four groups based on their carcinogenic potential. Group 1 agents are known human carcinogens; group 2A agents are probably carcinogenic to humans; group 3 agents lack data to support their role in carcinogenesis; and group 4 includes agents for which data support that they are not likely to be...
01:30Spontaneous and Induced Mutations
Spontaneous mutations arise infrequently during DNA replication due to errors in the process. A key factor behind these errors is tautomeric shifts in nitrogenous bases, where bases transition from keto to enol forms or amino to imino forms. This shift can alter base-pairing rules, leading to mutations. Additionally, reactive oxygen species (ROS) arising from aerobic metabolism can damage DNA, resulting in depurination (loss of a purine base) or depyrimidination (loss of a pyrimidine base).