Sub-lethal Toxicity
Sub-lethal Toxicity - Related Videos
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.
09:49
Kupffer Cell Isolation for Nanoparticle Toxicity Testing
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Cited by 28 •
2015
Liver macrophages, named Kupffer cells, are responsible for the capture of circulating nanoparticles. We describe here a method, of high cell purity and yield, for Kupffer cell isolation. The modified LDH assay is used here to measure the toxicity induced by carbon nanotubes in Kupffer cells.
02:56
C. elegans Survival Assay: A Short-Term Toxicity Test
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2023
This video introduces a short-term survival assay that tests a treatment for acute toxicity or tests a genetic strain for resistance to a toxic condition. The example protocol shows an example survival assay in which worms are tested for their ability to resist oxidative stress induced by paraquat (PQ).
13:59
Assaying β-amyloid Toxicity using a Transgenic C. elegans Model
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Cited by 76 •
2010
The intensely studied nematode worm Caenorhabditis elegans can be transgenically engineered to express the human β-amyloid peptide (Aβ). Induced expression of Aβ in C. elegans muscle leads to a rapid, reproducible paralysis phenotype that can be used to monitor treatments that modulate Aβ toxicity.
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.
FAQs
Sub-lethal toxicity is strongly influenced by dose, exposure duration, and developmental stage. The same chemical or environmental exposure can produce different neurological effects when intensity, timing, or persistence changes. Considering these variables helps explain why investigations may detect altered behavior, signaling, or neurodevelopment in some conditions but not others, even without rapid mortality.
Several interacting processes may be affected, including neuronal signaling, synaptic communication, ion balance, neurotransmitter systems, and cellular energy. Disruption in any of these areas can alter how neurons communicate or maintain normal function. Examining these mechanisms helps connect an exposure with later changes in cognition, motor function, sensory processing, or other neurological outcomes.
Repeated or low-level exposures can reveal neurological effects that are less visible than rapid mortality. Their importance lies in examining how ongoing exposure may influence signaling, synaptic communication, cellular energy, behavior, or neurodevelopment over time. This perspective supports investigations into whether sustained environmental or chemical exposure contributes to neurological disease or functional impairment.
A neuroscience assessment can examine changes in cognition, motor function, sensory processing, and neurodevelopment, while also considering cellular and signaling effects. These endpoints provide complementary information: behavioral changes show altered function, whereas disrupted ion balance, neurotransmitter systems, or cellular energy can indicate possible biological mechanisms underlying those outcomes.
Researchers should interpret findings in relation to dose, duration, and developmental stage rather than treating an exposure as a single uniform condition. Comparing these variables can clarify whether effects are associated with exposure intensity, persistence, or timing. Such comparisons also help distinguish changes in cognition, behavior, signaling, or neurodevelopment across experimental conditions.
It is relevant when chemical or environmental exposures produce neurological changes without rapid mortality. Assessing cognition, motor function, sensory processing, neurodevelopment, and underlying cellular processes can reveal impacts that mortality-based evaluations may overlook. These findings support environmental risk assessment by incorporating less visible effects on health and behavior into exposure evaluation.
Studies can identify neurological effects linked with chemical or environmental exposure, including disruption of signaling, synaptic communication, ion balance, neurotransmitter systems, or cellular energy. That information can guide safer chemical design by highlighting biological functions that require protection. It also provides a basis for considering behavioral and neurodevelopmental outcomes alongside survival.
Sub-lethal toxicity research examines whether repeated or low-level exposures contribute to neurological disease through changes in neuronal communication, neurotransmitter systems, ion balance, cellular energy, or development. Connecting these mechanisms with cognition, motor function, and sensory processing can help frame exposure-related disease investigations without relying only on immediate mortality as an outcome.