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Related Concept Videos

Enhanced Elimination of Poison01:26

Enhanced Elimination of Poison

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Poison can be effectively removed from the gastrointestinal (GI) tract through various decontamination procedures.
Antidotes serve a crucial role in counteracting the effects of poison by inhibiting enzymes responsible for producing harmful drug metabolites. In some cases, these toxic metabolites can be neutralized by endogenous cosubstrates, which are maintained at specific concentrations to prevent interaction with cellular macromolecules and subsequent cell death.
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Prevention of Further Absorption of Poison01:14

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In cases of acute poisoning, the primary objective is to prevent further absorption of the toxic substance into the body. Immediate interventions using various decontamination techniques targeting the gastrointestinal (GI) tract can achieve this. Decontamination is crucial to prevent poison from entering the systemic circulation, which involves washing affected areas with water and mild soap and removing contaminated clothing. Once external decontamination is done, attention must be turned to...
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Anticholinesterase Agents: Poisoning and Treatment01:26

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Anticholinesterases, also known as cholinesterase inhibitors, work by blocking the breakdown of acetylcholine, leading to its accumulation in the synaptic cleft. This accumulation indirectly enhances both muscarinic and nicotinic actions. These agents are classified as reversible or irreversible based on their mechanism of action.     
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Toxic Reactions: Overview01:26

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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.
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Types of Toxins01:36

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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.
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Antidotes01:17

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Antidotes are medicinal substances used to counteract the harmful effects of toxins or drugs in the body. They function in various ways, each uniquely designed to combat specific toxic compounds.
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Updated: Nov 22, 2025

Detection of Toxin Translocation into the Host Cytosol by Surface Plasmon Resonance
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Rapid toxin sequestration modifies poison frog physiology.

Lauren A O'Connell1,2, , Jeremy D O'Connell3

  • 1Department of Biology, Stanford University, Stanford, CA 94305, USA loconnel@stanford.edu.

The Journal of Experimental Biology
|January 7, 2021
PubMed
Summary
This summary is machine-generated.

Poison frogs quickly accumulate dietary alkaloids, like decahydroquinoline, within days. This toxin exposure alters key proteins in their intestines, liver, and skin, impacting physiology and immune responses.

Keywords:
AlkaloidsComplement systemCytochrome P450sProteomicsSaxiphilin

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Area of Science:

  • Toxicology
  • Biochemistry
  • Animal Physiology

Background:

  • Poison frogs utilize sequestered alkaloids from arthropod diets for defense.
  • The physiological mechanisms enabling alkaloid bioaccumulation in frogs remain largely uncharacterized.

Purpose of the Study:

  • To investigate the kinetics of alkaloid accumulation in poison frogs.
  • To identify physiological adaptations and protein expression changes in response to dietary alkaloid exposure.

Main Methods:

  • An alkaloid-feeding experiment was performed using the Diablito poison frog (Oophaga sylvatica).
  • Quantitative proteomics was employed to analyze tissue proteomes after decahydroquinoline exposure.

Main Results:

  • Diablito poison frogs rapidly accumulated decahydroquinoline within 4 days.
  • Dietary decahydroquinoline significantly altered protein abundance in frog intestines, liver, and skin.
  • Upregulated proteins included plasma glycoproteins (complement system, saxiphilin) and membrane transport proteins.

Conclusions:

  • Poison frogs exhibit rapid dietary alkaloid sequestration.
  • Alkaloid exposure induces significant physiological changes, including immune response modulation and altered small molecule transport and metabolism.
  • These findings highlight key adaptations in poison frogs for managing toxic compounds.