Developmental Toxicology
Developmental Toxicology - Related Videos
09:06
An Introduction to Developmental Genetics
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Development is the complex process through which a single-celled embryo transforms into a multicellular organism. Developmental processes are guided by information encoded in an organism's DNA, and geneticists are trying to understand how this information leads to a fully formed organism. This video reviews seminal research in the field of developmental biology, including the identification of specific genes that control various embryonic processes. An introduction to the major questions asked...
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An Introduction to Molecular Developmental Biology
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2023
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06:25
Explant Culture for Developmental Studies
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2023
Explant culture is a technique in which living cells or tissues are removed from an embryo for continued development outside of the organism. This ex vivo approach allows researchers to manipulate and observe developing tissues in ways that are not possible in vivo. Once established, explant culture is frequently used to understand the role of genes and signaling molecules in organogenesis. This video will first introduce the basic principles of explant culture and demonstrate a protocol to...
11:38
High Content Screening Analysis to Evaluate the Toxicological Effects of Harmful and Potentially Harmful Constituents (HPHC)
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Cited by 23 •
2016
The objective of the study was to assess the biological impact of 15 cigarette smoke constituents using a combination of an impedance-based real time cell analyzer and a high-content screening (HCS)-based platform for toxicological assessment in vitro. This study provides information on effective doses, toxicity and modes of action of the tested compounds.
FAQs
Risk depends on more than the amount of an exposure. Dose must be interpreted alongside when exposure occurs, how the mother metabolizes the substance, and whether it crosses the placenta. These variables can change the concentration reaching the developing organism and can alter effects on signaling, gene expression, organ formation, growth, or maturation.
Developmental stage changes which biological processes may be affected. An exposure encountered while organs are forming may be evaluated for effects on formation, whereas exposure during later functional maturation may raise different concerns involving growth or developing regulatory systems. This timing-sensitive analysis helps explain why the same agent can produce different developmental outcomes at different stages.
Placental transfer and maternal metabolism connect an external exposure with fetal or early-life biology. Maternal metabolism can modify the substance before it reaches the placenta, while transfer determines whether the developing organism is exposed. Developmental toxicology therefore considers both processes when interpreting dose, mechanism, and potential pharmacological risk rather than treating administered dose as the only relevant measure.
An assessment typically begins by defining the exposure and its dose and timing, then considering maternal metabolism and placental transfer. Experimental models can be used to examine developmental responses across relevant stages. Investigators then relate observed changes in signaling, gene expression, organ formation, growth, or functional maturation to drug-safety and reproductive-risk decisions.
Experimental outcomes can be organized across several levels rather than reduced to a single visible effect. Studies may examine altered cell signaling or gene expression, followed by consequences for organ formation, growth, and functional maturation. This layered interpretation connects molecular and developmental observations, helping pharmacologists evaluate whether an exposure may affect development and how dose selection should proceed.
In pharmacology, the findings inform more than a hazard classification. They support selection of doses, evaluation of teratogenicity and reproductive risk, development of safer therapeutic strategies, and regulatory decisions. The same evidence also helps focus protection on embryos, fetuses, infants, and developing children, whose immature organs and regulatory systems can increase concern.