Toxicology intro
Undergraduate · Chemistry
Syllabus focus
Standard syllabus · STEM / applied
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Topics typically covered
Standard syllabus
Foundations of toxicology
- History and scope of toxicology
- Paracelsus principle: dose makes the poison
- Types of toxicology: descriptive, mechanistic, regulatory, forensic
- Exposure routes: oral, dermal, inhalation, injection
- Absorption, distribution, metabolism, excretion (ADME) of xenobiotics
- Toxicokinetics vs toxicodynamics
- Acute vs chronic toxicity
- Local vs systemic toxicity
- Reversible vs irreversible toxic effects
- Synergism, antagonism, and potentiation
Dose–response and hazard assessment
- Dose–response curves and threshold concepts
- LD₅₀, LC₅₀, and median effective doses
- No-observed-adverse-effect level (NOAEL)
- Reference dose and margin of safety
- Hormesis and low-dose effects (debate)
- Species differences and allometric scaling
- Interspecies extrapolation in risk assessment
- Sensitive subpopulations: children, elderly, pregnant
- Occupational exposure limits: PEL, TLV
- Hazard vs risk: identification, characterization, management
Mechanisms of toxicity
- Electrophilic and nucleophilic toxic reactions
- Reactive oxygen species and oxidative stress
- Lipid peroxidation and membrane damage
- DNA adducts, mutations, and carcinogenesis
- Cytochrome P450 metabolism and reactive metabolites
- Phase II conjugation and toxicity modification
- Receptor-mediated toxicity: endocrine disruption
- Neurotoxicity: cholinesterase inhibitors, neurotransmitters
- Hepatotoxicity and nephrotoxicity mechanisms
- Immunotoxicity and hypersensitivity reactions
Testing and regulatory toxicology
- In vitro assays: cell culture, Ames test
- In vivo animal studies: acute, subchronic, chronic
- Alternative methods: 3Rs (replacement, reduction, refinement)
- Epidemiological studies and human evidence
- IARC carcinogen classification groups
- OSHA, EPA, and FDA regulatory roles
- REACH and TSCA chemical registration (overview)
- Material safety data sheets and GHS labeling
- Environmental toxicology: bioaccumulation, ecotoxicity
- Risk assessment framework: hazard identification through risk characterization
STEM / applied
Laboratory and analytical methods
- Ames mutagenicity assay principles
- Cell viability assays: MTT, LDH release
- LC-MS/MS for toxicant detection in biological samples
- Sample preparation for biofluid analysis
- Dose calculation and solution preparation for assays
- Statistical analysis of dose–response data
- Probit analysis for LD₅₀ determination (intro)
- Quality control in toxicology laboratories
- Good laboratory practice (GLP) standards (overview)
- Writing toxicology study reports
Applied toxicology
- Pharmaceutical toxicity screening in drug development
- Pesticide registration toxicology requirements
- Occupational exposure in chemical manufacturing
- Environmental disasters: case studies (Love Canal, Minamata)
- Food toxicants: mycotoxins, heavy metals, acrylamide
- Consumer product safety: cosmetics, cleaning products
- Forensic toxicology: drugs of abuse and poisoning
- Clinical toxicology and poison control
- Risk communication to the public
- Career paths in regulatory, industrial, and academic toxicology
Notes
Introduction to toxicology for chemistry undergraduates. Topics reflect common toxicology intro syllabi at US colleges and universities. Interdisciplinary connections to biochemistry, pharmacology, and environmental science are common.