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Related Concept Videos

Toxicity Testing in Animals01:23

Toxicity Testing in Animals

Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...
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Toxicokinetics: Overview

Studies that assess how a drug is absorbed, distributed, metabolized, and excreted (ADME) at toxic doses are termed toxicokinetics. Understanding toxicokinetics helps predict adverse drug reactions (ADRs) and manage toxicity in humans.Toxicokinetics differs from pharmacokinetics mainly in the dose levels studied, with toxicokinetics focusing on higher toxic doses. The kinetics at these levels can be non-linear due to altered physiological processes. Toxicodynamics examines the relationship...
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Toxic Reactions: Overview

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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Drug Toxicity: Dose-Dependent Reactions

Drug toxicities can be stratified into pharmacological, pathological, or genotoxic based on their mechanisms. The incidence and severity of these toxicities generally increase with the drug's concentration in the body and exposure time.Pharmacological toxicity is evident when the therapeutic effects of drugs overshoot into adverse reactions in a predictable, dose-dependent manner. Central nervous system (CNS) depression from barbiturates is a classic example, with effects escalating from...
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Drug toxicity quantifies the harm a compound causes to an organism, varying by dose and potentially impacting whole systems or specific organs like the liver. Toxic reactions may arise from venomous insect or spider bites, with effects ranging from mild symptoms to severe outcomes such as brain damage or death. Common forms of acute poisoning include ethanol intoxication and overdose of pain or fever medications, with substances like GHB and heroin being particularly lethal at doses close to...
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High Content Screening Analysis to Evaluate the Toxicological Effects of Harmful and Potentially Harmful Constituents (HPHC)
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High Content Screening Analysis to Evaluate the Toxicological Effects of Harmful and Potentially Harmful Constituents (HPHC)

Published on: May 10, 2016

Analytical toxicology.

Hans H Maurer1

  • 1Department of Experimental and Clinical Toxicology, Institute of Experimental and Clinical Pharmacology and Toxicology, Saarland University, Homburg, Germany. hans.maurer@uks.eu

EXS
|April 3, 2010
PubMed
Summary
This summary is machine-generated.

This review covers methods for detecting drugs, poisons, and metabolites in biological samples using advanced techniques like gas and liquid chromatography-mass spectrometry. It discusses sample selection, quality control, and result interpretation in analytical toxicology.

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Area of Science:

  • Analytical Chemistry
  • Forensic Science
  • Toxicology

Background:

  • Analytical toxicology relies on precise detection of exogenous compounds in biological matrices.
  • Established methods require careful consideration of sample type and analytical technique for accurate results.

Purpose of the Study:

  • To provide a comprehensive overview of current analytical toxicology procedures.
  • To discuss the selection of appropriate biosamples and analytical methodologies.
  • To highlight the importance of quality control and result interpretation.

Main Methods:

  • Review of established and emerging techniques for drug, poison, and metabolite screening, identification, and quantification.
  • Focus on gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS).
  • Discussion of sample preparation (work-up) procedures for various biological matrices.

Main Results:

  • GC-MS and LC-MS are the predominant techniques in modern analytical toxicology.
  • Selection of the optimal biosample (e.g., blood, urine, tissues, hair, oral fluid) is critical for reliable analysis.
  • Quality control measures and the interpretation of analytical findings are essential for valid conclusions.

Conclusions:

  • Effective analytical toxicology requires careful method selection, appropriate sample choice, and rigorous quality assurance.
  • Understanding the possibilities and limitations of interpretation is key to applying analytical results in forensic and clinical settings.