In Vitro Toxicity
In Vitro Toxicity - Related Videos
05:44
In vitro Cell Culture Model for Toxic Inhaled Chemical Testing
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Cited by 25 •
2014
This protocol is designed to demonstrate exposure method of cell cultures to inhaled toxic chemicals. Exposure of differentiated air-liquid interface (ALI) cultures of airway epithelial cells provides a unique model of airway exposure to toxic gases such as chlorine. In this manuscript we describe effect of chlorine exposure on air-liquid interface cultures of epithelial cells and submerged culture of cardiomyocytes. In vitro exposure systems allow important mechanistic studies to evaluate...
14:40
Long-term Lethal Toxicity Test with the Crustacean Artemia franciscana
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Cited by 34 •
2012
This study concerns the development and standardization of a valuable methodological protocol to determine long-term (14 days) lethal toxicity exerted by chemical substances, industrial wastewater or sewage and liquid environmental samples on the saltwater crustacean, Artemia franciscana.
09:06
Growth Assays to Assess Polyglutamine Toxicity in Yeast
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Cited by 3 •
2012
This manuscript describes three complementary protocols for assessing the toxicity of polyglutamine (polyQ)-expansion proteins in the yeast Saccharomyces cerevisiae. These protocols can easily be modified to monitor the toxicity of other misfolded proteins in yeast.
11:06
Human Liver Microphysiological System for Assessing Drug-Induced Liver Toxicity In Vitro
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Cited by 11 •
2022
Drug-induced liver injury (DILI) is a major cause of drug failure. A protocol has been developed to accurately predict the DILI liability of a compound using a liver microphysiological system (MPS). The liver model uses the coculture of primary hepatic cells and translationally relevant endpoints to assess cellular responses to treatment.
08:25
Advanced 3D Liver Models for In vitro Genotoxicity Testing Following Long-Term Nanomaterial Exposure
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Cited by 21 •
2020
This procedure was established to be used for developing advanced 3D hepatic cultures in vitro, which can provide a more physiologically relevant assessment of the genotoxic hazards associated with nanomaterial exposures over both an acute or long-term, repeated dose regimes.
FAQs
Dose and exposure time determine how strongly a biological system responds to a substance. Testing defined concentrations over controlled periods allows researchers to compare mild and severe effects and identify whether responses increase with concentration or duration. This design supports dose-dependent analysis, helping distinguish weaker effects from conditions that produce substantial cellular damage.
Each endpoint captures a different aspect of biological injury. Viability indicates whether cells remain alive, membrane integrity reflects damage to the cell boundary, oxidative stress identifies a damaging cellular response, and functional measurements reveal disruption without necessarily showing immediate cell death. Using several endpoints provides a broader picture of how a substance affects cells or tissues.
In vitro systems provide controlled conditions that make substances, concentrations, and exposure periods easier to compare. However, cultured cells or tissues do not reproduce every feature of a whole organism, so their responses require careful interpretation before predicting organism-level toxicity. The approach is therefore valuable for early investigation, but it does not by itself establish complete biological effects in an organism.
Researchers first maintain a selected cell or tissue system outside the organism, then expose it to defined concentrations of the chemical, drug, or other substance for controlled periods. They subsequently measure relevant responses, such as viability, membrane integrity, oxidative stress, or altered cellular function. Comparing these measurements across conditions reveals concentration- and time-related patterns.
The method is useful when researchers need an early comparison of how chemicals, drugs, or other substances affect biological systems. Controlled exposure and measurable cellular responses can indicate potentially harmful effects before more extensive investigation. Its speed and ability to compare defined conditions also make it suitable for prioritizing substances that require closer safety evaluation.
In vitro assays can support environmental risk assessment by showing how biological cells or tissues respond to substances under controlled exposure conditions. Measurements such as reduced viability, disrupted membrane integrity, oxidative stress, or altered cellular function provide evidence of potential biological harm. These findings help investigate hazards, while interpretation remains necessary before extending results to whole organisms.
By measuring distinct cellular responses after controlled exposure, researchers can examine how harmful substances affect biological systems and identify patterns associated with tissue damage. Changes in viability, membrane integrity, oxidative stress, or cellular function provide complementary evidence rather than a single outcome. This mechanistic information can clarify injury processes and reduce reliance on animal studies during early research.