Related Experiment Video
Updated: Mar 20, 2026

17:28
Human Pluripotent Stem Cell Based Developmental Toxicity Assays for Chemical Safety Screening and Systems Biology Data Generation
Published on: June 17, 2015
13.2K
The Emergence of Systematic Review in Toxicology
Martin L Stephens1, Kellyn Betts2, Nancy B Beck3
1Johns Hopkins Center for Alternatives to Animal Testing, Baltimore, Maryland msteph14@jhu.edu.
Summary
Systematic review methods are emerging in toxicology, drawing from medical approaches. Harmonizing these evidence-based methods across agencies is recommended for consistent application in toxicology.
Area of Science:
- Toxicology
- Evidence-based science
- Systematic review
Background:
- The Evidence-based Toxicology Collaboration convened a workshop on systematic review and evidence-based approaches in toxicology.
- The workshop gathered experts applying these methods in toxicology, from medicine and healthcare, and diverse stakeholders.
Framework:
- Examined historical antecedents of systematic review in medicine and toxicology.
- Identified challenges in translating medical systematic review methods to toxicology.
- Explored the current state of systematic review in toxicology.
Implementation:
- Focused on adapting systematic review methods for toxicological questions.
- Highlighted experiences from various agencies and organizations.
- Facilitated discussion among diverse stakeholders.
Implications:
- Recommends continued collaboration for harmonized application of systematic review methods.
- Aims to ensure consistency in evidence-based toxicology.
- Supports the advancement of reliable toxicological assessments.
Related Concept Videos
Toxicity Testing in Animals
124
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...
124
Toxic Reactions: Overview
3.6K
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,...
3.6K
Toxicokinetics: Overview
145
Studies that assess how a drug is absorbed, distributed, metabolized, and excreted (ADME) at toxic doses are termed toxicokinetics. Understanding toxicokinetics helps predict adverse drug reactions (ADRs) and manage toxicity in humans.Toxicokinetics differs from pharmacokinetics mainly in the dose levels studied, with toxicokinetics focusing on higher toxic doses. The kinetics at these levels can be non-linear due to altered physiological processes. Toxicodynamics examines the relationship...
145
Drug Toxicity: Overview
159
Drug toxicity quantifies the harm a compound causes to an organism, varying by dose and potentially impacting whole systems or specific organs like the liver. Toxic reactions may arise from venomous insect or spider bites, with effects ranging from mild symptoms to severe outcomes such as brain damage or death. Common forms of acute poisoning include ethanol intoxication and overdose of pain or fever medications, with substances like GHB and heroin being particularly lethal at doses close to...
159
Types of Toxins
4.0K
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...
4.0K
Bioactivation and Tissue Toxicity
102
Bioactivation is a metabolic process that transforms less reactive substances into highly reactive metabolites, initiating tissue toxicity. This transformation can lead to various toxic effects, including carcinogenesis and teratogenesis. Reactive metabolites are classified into two main types: electrophiles and free radicals.Electrophiles are electron-deficient species and are produced primarily by the enzyme cytochrome P-450 during the metabolism of compounds containing carbon, nitrogen, or...
102

