Related Experiment Video
Updated: May 11, 2026

08:58
Using Caenorhabditis elegans for Studying Trans- and Multi-Generational Effects of Toxicants
Published on: July 29, 2019
[Genetic toxicology: findings and challenges].
1Vavilov Institute of General Genetics, RAS, Moscow, Russia
Genetika
|May 14, 2013
Summary
Genetic toxicology studies the effects of chemicals on DNA to identify potential carcinogens and mutagens. This review summarizes its history, methods, and future challenges in human health risk assessment.
Area of Science:
- Genetic toxicology
- Molecular toxicology
- Chemical carcinogenesis
Context:
- Evolution of genetic toxicology as a distinct scientific discipline.
- Methodological advancements in assessing genetic damage.
- Regulatory and ethical considerations in genotoxicity testing.
Purpose:
- To review the historical development and key issues in genetic toxicology.
- To discuss strategies for identifying genotoxic compounds, including potential human carcinogens.
- To outline methods for detecting compounds that induce heritable mutations.
Summary:
- The review covers the history and evolution of genetic toxicology methodologies.
- It examines testing strategies for genotoxic compounds to identify carcinogens and mutagens.
- Key 20th-century achievements and 21st-century challenges are presented.
Impact:
- Provides a comprehensive overview of genetic toxicology for researchers and regulators.
- Informs the identification of hazardous chemicals, protecting human health.
- Highlights future research directions in genotoxicity assessment and risk evaluation.
Related Concept Videos
Mutagenicity 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...
Toxicity Testing in Animals
Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...
Drug Toxicity: Dose-Dependent Reactions
Drug toxicities can be stratified into pharmacological, pathological, or genotoxic based on their mechanisms. The incidence and severity of these toxicities generally increase with the drug's concentration in the body and exposure time.Pharmacological toxicity is evident when the therapeutic effects of drugs overshoot into adverse reactions in a predictable, dose-dependent manner. Central nervous system (CNS) depression from barbiturates is a classic example, with effects escalating from...
Types of Toxins
Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Drug toxicity: Idiosyncratic Reactions
Idiosyncratic drug reactions represent abnormal chemical responses that vary significantly among individuals, ranging from extreme sensitivity to low doses to insensitivity to high doses. These reactions often occur due to the drug's covalent binding with serum proteins, forming a foreign hapten that triggers an immunotoxicological response. The variability in drug reactions has a strong pharmacogenetic foundation, with genetic differences crucial in how individuals metabolize drugs. For...
Toxic Reactions: Overview
When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...

